resources: Enhancements to user and group

This patch adds autoedges between users and groups, and extends
users with additional fields for supplementary groups and a named
primary group. Also, some small fixes to log and error messages.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,36 @@
+## Tips:
+
+* commit message titles must be in the form:
+```topic: Capitalized message with no trailing period```
+or:
+```topic, topic2: Capitalized message with no trailing period```
+
+* golang code must be formatted according to the standard, please run:
+```
+make gofmt		# formats the entire project correctly
+```
+or format a single golang file correctly:
+```
+gofmt -w yourcode.go
+```
+
+* please rebase your patch against current git master:
+```
+git checkout master
+git pull origin master
+git checkout your-feature
+git rebase master
+git push your-remote your-feature
+hub pull-request	# or submit with the github web ui
+```
+
+* after a patch review, please ping @purpleidea so we know to re-review:
+```
+# make changes based on reviews...
+git add -p		# add new changes
+git commit --amend	# combine with existing commit
+git push your-remote your-feature -f
+# now ping @purpleidea in the github PR since it doesn't notify us automatically
+```
+
+## Thanks for contributing to mgmt and welcome to the team!

.gitignore

@@ -2,6 +2,7 @@
 .omv/
 .ssh/
 .vagrant/
+.envrc
 old/
 tmp/
 *_stringer.go

.gitmodules

@@ -16,3 +16,9 @@
 [submodule "vendor/honnef.co/go/augeas"]
 	path = vendor/honnef.co/go/augeas
 	url = https://github.com/dominikh/go-augeas/
+[submodule "vendor/github.com/grpc-ecosystem/go-grpc-prometheus"]
+	path = vendor/github.com/grpc-ecosystem/go-grpc-prometheus
+	url = https://github.com/grpc-ecosystem/go-grpc-prometheus
+[submodule "vendor/github.com/ugorji/go"]
+	path = vendor/github.com/ugorji/go
+	url = https://github.com/ugorji/go

.travis.yml

@@ -1,8 +1,7 @@
 language: go
 go:
-  - 1.6.x
-  - 1.7.x
   - 1.8.x
+  - 1.9.x
   - tip
 go_import_path: github.com/purpleidea/mgmt
 sudo: true
@@ -16,7 +15,7 @@ matrix:
   fast_finish: true
   allow_failures:
     - go: tip
-    - go: 1.8.x
+    - go: 1.9.x
 notifications:
   irc:
     channels:

COPYING

@@ -1,5 +1,5 @@
-                    GNU AFFERO GENERAL PUBLIC LICENSE
-                       Version 3, 19 November 2007
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
 
  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
@@ -7,15 +7,17 @@
 
                             Preamble
 
-  The GNU Affero General Public License is a free, copyleft license for
-software and other kinds of works, specifically designed to ensure
-cooperation with the community in the case of network server software.
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
 
   The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works.  By contrast,
-our General Public Licenses are intended to guarantee your freedom to
+the GNU General Public License is intended to guarantee your freedom to
 share and change all versions of a program--to make sure it remains free
-software for all its users.
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
 
   When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
@@ -24,34 +26,44 @@ them if you wish), that you receive source code or can get it if you
 want it, that you can change the software or use pieces of it in new
 free programs, and that you know you can do these things.
 
-  Developers that use our General Public Licenses protect your rights
-with two steps: (1) assert copyright on the software, and (2) offer
-you this License which gives you legal permission to copy, distribute
-and/or modify the software.
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
 
-  A secondary benefit of defending all users' freedom is that
-improvements made in alternate versions of the program, if they
-receive widespread use, become available for other developers to
-incorporate.  Many developers of free software are heartened and
-encouraged by the resulting cooperation.  However, in the case of
-software used on network servers, this result may fail to come about.
-The GNU General Public License permits making a modified version and
-letting the public access it on a server without ever releasing its
-source code to the public.
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
 
-  The GNU Affero General Public License is designed specifically to
-ensure that, in such cases, the modified source code becomes available
-to the community.  It requires the operator of a network server to
-provide the source code of the modified version running there to the
-users of that server.  Therefore, public use of a modified version, on
-a publicly accessible server, gives the public access to the source
-code of the modified version.
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
 
-  An older license, called the Affero General Public License and
-published by Affero, was designed to accomplish similar goals.  This is
-a different license, not a version of the Affero GPL, but Affero has
-released a new version of the Affero GPL which permits relicensing under
-this license.
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
 
   The precise terms and conditions for copying, distribution and
 modification follow.
@@ -60,7 +72,7 @@ modification follow.
 
   0. Definitions.
 
-  "This License" refers to version 3 of the GNU Affero General Public License.
+  "This License" refers to version 3 of the GNU General Public License.
 
   "Copyright" also means copyright-like laws that apply to other kinds of
 works, such as semiconductor masks.
@@ -537,45 +549,35 @@ to collect a royalty for further conveying from those to whom you convey
 the Program, the only way you could satisfy both those terms and this
 License would be to refrain entirely from conveying the Program.
 
-  13. Remote Network Interaction; Use with the GNU General Public License.
-
-  Notwithstanding any other provision of this License, if you modify the
-Program, your modified version must prominently offer all users
-interacting with it remotely through a computer network (if your version
-supports such interaction) an opportunity to receive the Corresponding
-Source of your version by providing access to the Corresponding Source
-from a network server at no charge, through some standard or customary
-means of facilitating copying of software.  This Corresponding Source
-shall include the Corresponding Source for any work covered by version 3
-of the GNU General Public License that is incorporated pursuant to the
-following paragraph.
+  13. Use with the GNU Affero General Public License.
 
   Notwithstanding any other provision of this License, you have
 permission to link or combine any covered work with a work licensed
-under version 3 of the GNU General Public License into a single
+under version 3 of the GNU Affero General Public License into a single
 combined work, and to convey the resulting work.  The terms of this
 License will continue to apply to the part which is the covered work,
-but the work with which it is combined will remain governed by version
-3 of the GNU General Public License.
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
 
   14. Revised Versions of this License.
 
   The Free Software Foundation may publish revised and/or new versions of
-the GNU Affero General Public License from time to time.  Such new versions
-will be similar in spirit to the present version, but may differ in detail to
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
 
   Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU Affero General
+Program specifies that a certain numbered version of the GNU General
 Public License "or any later version" applies to it, you have the
 option of following the terms and conditions either of that numbered
 version or of any later version published by the Free Software
 Foundation.  If the Program does not specify a version number of the
-GNU Affero General Public License, you may choose any version ever published
+GNU General Public License, you may choose any version ever published
 by the Free Software Foundation.
 
   If the Program specifies that a proxy can decide which future
-versions of the GNU Affero General Public License can be used, that proxy's
+versions of the GNU General Public License can be used, that proxy's
 public statement of acceptance of a version permanently authorizes you
 to choose that version for the Program.
 
@@ -633,29 +635,40 @@ the "copyright" line and a pointer to where the full notice is found.
     Copyright (C) <year>  <name of author>
 
     This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU Affero General Public License as published by
+    it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Affero General Public License for more details.
+    GNU General Public License for more details.
 
-    You should have received a copy of the GNU Affero General Public License
+    You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
-  If your software can interact with users remotely through a computer
-network, you should also make sure that it provides a way for users to
-get its source.  For example, if your program is a web application, its
-interface could display a "Source" link that leads users to an archive
-of the code.  There are many ways you could offer source, and different
-solutions will be better for different programs; see section 13 for the
-specific requirements.
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
 
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU AGPL, see
+For more information on this, and how to apply and follow the GNU GPL, see
 <http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

COPYRIGHT

@@ -3,14 +3,14 @@ Copyright (C) 2013-2017+ James Shubin and the project contributors
 Written by James Shubin <james@shubin.ca> and the project contributors
 
 This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU Affero General Public License as published by
+it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU Affero General Public License for more details.
+GNU General Public License for more details.
 
-You should have received a copy of the GNU Affero General Public License
+You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.

Makefile

@@ -3,16 +3,16 @@
 # Written by James Shubin <james@shubin.ca> and the project contributors
 #
 # This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
+# it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
+# GNU General Public License for more details.
 #
-# You should have received a copy of the GNU Affero General Public License
+# You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 SHELL = /usr/bin/env bash

README.md

@@ -80,6 +80,7 @@ We'd love to have your patches! Please send them by email, or as a pull request.
 | James Shubin | blog | [Metaparameters in mgmt](https://ttboj.wordpress.com/2017/03/01/metaparameters-in-mgmt/) |
 | James Shubin | video | [Recording from Incontro DevOps 2017](https://vimeo.com/212241877) |
 | Yves Brissaud | blog | [mgmt aux HumanTalks Grenoble (french)](http://log.winsos.net/2017/04/12/mgmt-aux-human-talks-grenoble.html) |
+| James Shubin | video | [Recording from OSDC Berlin 2017](https://www.youtube.com/watch?v=LkEtBVLfygE&html5=1) |
 
 ##
 

Vagrantfile

@@ -6,13 +6,16 @@ Vagrant.configure(2) do |config|
 	config.vm.synced_folder ".", "/vagrant", disabled: true
 
 	config.vm.define "mgmt-dev" do |instance|
-		instance.vm.box = "fedora/24-cloud-base"
+		instance.vm.box = "fedora/26-cloud-base"
 	end
 
 	config.vm.provider "virtualbox" do |v|
 		v.memory = 1536
 		v.cpus = 2
 	end
+	config.vm.provider "libvirt" do |v|
+		v.memory = 2048
+	end
 
 	config.vm.provision "file", source: "vagrant/motd", destination: ".motd"
 	config.vm.provision "shell", inline: "cp ~vagrant/.motd /etc/motd"

converger/converger.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package converger is a facility for reporting the converged state.
@@ -85,7 +85,7 @@ type cuid struct {
 }
 
 // NewConverger builds a new converger struct.
-func NewConverger(timeout int, stateFn func(bool) error) *converger {
+func NewConverger(timeout int, stateFn func(bool) error) Converger {
 	return &converger{
 		timeout: timeout,
 		stateFn: stateFn,

doc.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package main provides the main entrypoint for using the `mgmt` software.

docs/quick-start-guide.md

@@ -21,7 +21,8 @@ dependencies, _runtime_ dependencies, and additionally, a few extra dependencies
 required for running the _test_ suite.
 
 ### Build
-* `golang` 1.6 or higher (required, available in most distros)
+* `golang` 1.8 or higher (required, available in some distros and distributed
+  as a binary officially by [golang.org](https://golang.org/dl/))
 * golang libraries (required, available with `go get ./...`) a partial list includes:
 ```
 github.com/coreos/etcd/client
@@ -60,7 +61,7 @@ For building a visual representation of the graph, `graphviz` is required.
 * golint `github.com/golang/lint/golint`
 
 ## Quick start
-* Make sure you have golang version 1.6 or greater installed.
+* Make sure you have golang version 1.8 or greater installed.
 * If you do not have a GOPATH yet, create one and export it:
 ```
 mkdir $HOME/gopath

docs/resource-guide.md

@@ -73,14 +73,13 @@ Init() error
 ```
 
 This is called to initialize the resource. If something goes wrong, it should
-return an error. It should set the resource `kind`, do any resource specific
-work, and finish by calling the `Init` method of the base resource.
+return an error. It should do any resource specific work, and finish by calling
+the `Init` method of the base resource.
 
 #### Example
 ```golang
 // Init initializes the Foo resource.
 func (obj *FooRes) Init() error {
-	obj.BaseRes.Kind = "foo" // must lower case resource kind
 	// run the resource specific initialization, and error if anything fails
 	if some_error {
 		return err // something went wrong!
@@ -399,9 +398,9 @@ UnmarshalYAML(unmarshal func(interface{}) error) error // optional
 ```
 
 This is optional, but recommended for any resource that will have a YAML
-accessible struct, and an entry in the `GraphConfig` struct. It is not required
-because to do so would mean that third-party or custom resources (such as those
-someone writes to use with `libmgmt`) would have to implement this needlessly.
+accessible struct. It is not required because to do so would mean that
+third-party or custom resources (such as those someone writes to use with
+`libmgmt`) would have to implement this needlessly.
 
 The signature intentionally matches what is required to satisfy the `go-yaml`
 [Unmarshaler](https://godoc.org/gopkg.in/yaml.v2#Unmarshaler) interface.
@@ -453,35 +452,15 @@ type FooRes struct {
 }
 ```
 
-### YAML
-In addition to labelling your resource struct with YAML fields, you must also
-add an entry to the internal `GraphConfig` struct. It is a fairly straight
-forward one line patch.
+### Resource registration
+All resources must be registered with the engine so that they can be found. This
+also ensures they can be encoded and decoded. Make sure to include the following
+code snippet for this to work.
 
 ```golang
-type GraphConfig struct {
-// [snip...]
-	Resources struct {
-		Noop []*resources.NoopRes `yaml:"noop"`
-		File []*resources.FileRes `yaml:"file"`
-		// [snip...]
-		Foo []*resources.FooRes `yaml:"foo"` // tada :)
-	}
-}
-```
-
-It's also recommended that you add the [UnmarshalYAML](#unmarshalyaml) method to
-your resources so that unspecified values are given sane defaults.
-
-### Gob registration
-All resources must be registered with the `golang` _gob_ module so that they can
-be encoded and decoded. Make sure to include the following code snippet for this
-to work.
-
-```golang
-import "encoding/gob"
 func init() { // special golang method that runs once
-	gob.Register(&FooRes{}) // substitude your resource here
+	// set your resource kind and struct here (the kind must be lower case)
+	RegisterResource("foo", func() Res { return &FooRes{} })
 }
 ```
 

etcd/etcd.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // TODO: Add TTL's (eg: volunteering)
@@ -529,8 +529,9 @@ func (obj *EmbdEtcd) CtxError(ctx context.Context, err error) (context.Context,
 	if obj.ctxErr != nil { // stop on permanent error
 		return ctx, obj.ctxErr
 	}
-	const ctxErr = "ctxErr"
-	const ctxIter = "ctxIter"
+	type ctxKey string // use a non-basic type as ctx key (str can conflict)
+	const ctxErr ctxKey = "ctxErr"
+	const ctxIter ctxKey = "ctxIter"
 	expBackoff := func(tmin, texp, iter, tmax int) time.Duration {
 		// https://en.wikipedia.org/wiki/Exponential_backoff
 		// tmin <= texp^iter - 1 <= tmax // TODO: check my math

etcd/methods.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package etcd

etcd/resources.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package etcd
@@ -171,7 +171,6 @@ func GetResources(obj *EmbdEtcd, hostnameFilter, kindFilter []string) ([]resourc
 		}
 
 		if obj, err := resources.B64ToRes(val); err == nil {
-			obj.SetKind(kind) // cheap init
 			log.Printf("Etcd: Get: (Hostname, Kind, Name): (%s, %s, %s)", hostname, kind, name)
 			resourceList = append(resourceList, obj)
 		} else {

etcd/str.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package etcd

etcd/strmap.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package etcd

etcd/world.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package etcd

event/event.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package event provides some primitives that are used for message passing.

examples/autoedges4.yaml

@@ -0,0 +1,19 @@
+---
+graph: mygraph
+resources:
+  user:
+  - name: edgeuser
+    state: absent
+    gid: 10000
+  - name: edgeuser2
+    state: exists
+    group: edgegroup
+    groups: [edgegroup2, edgegroup3]
+  group:
+  - name: edgegroup
+    state: exists
+    gid: 10000
+  - name: edgegroup2
+    state: exists
+  - name: edgegroup3
+    state: exists

examples/aws_ec2_1.yaml

@@ -0,0 +1,10 @@
+---
+graph: mygraph
+resources:
+  aws:ec2:
+  - name: ec2example
+    region: ca-central-1
+    type: t2.micro
+    imageid: ami-5ac17f3e
+    state: running
+edges: []

examples/graph0.hcl

@@ -0,0 +1,14 @@
+resource "file" "file1" {
+  path = "/tmp/mgmt-hello-world"
+  content = "hello, world"
+  state = "exists"
+  depends_on = ["noop.noop1", "exec.sleep"]
+}
+
+resource "noop" "noop1" {
+  test = "nil"
+}
+
+resource "exec" "sleep" {
+ cmd = "sleep 10s"
+}

examples/graph1.hcl

@@ -0,0 +1,4 @@
+resource "exec" "exec1" {
+  cmd = "cat /tmp/mgmt-hello-world"
+  state =  "present"
+}

examples/group1.yaml

@@ -0,0 +1,8 @@
+---
+graph: mygraph
+resources:
+  group:
+  - name: testgroup
+    state: exists
+    gid: 10000
+edges: []

examples/hil.hcl

@@ -0,0 +1,9 @@
+resource "file" "file1" {
+  path = "/tmp/mgmt-hello-world"
+  content = "${exec.sleep.Output}"
+  state = "exists"
+}
+
+resource "exec" "sleep" {
+ cmd = "echo hello"
+}

examples/lib/exec-send-recv.go

@@ -61,12 +61,12 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 		return nil, err
 	}
 
-	// FIXME: these are being specified temporarily until it's the default!
 	metaparams := resources.DefaultMetaParams
 
 	exec1 := &resources.ExecRes{
 		BaseRes: resources.BaseRes{
 			Name:       "exec1",
+			Kind:       "exec",
 			MetaParams: metaparams,
 		},
 		Cmd:   "echo hello world && echo goodbye world 1>&2", // to stdout && stderr
@@ -77,6 +77,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	output := &resources.FileRes{
 		BaseRes: resources.BaseRes{
 			Name:       "output",
+			Kind:       "file",
 			MetaParams: metaparams,
 			// send->recv!
 			Recv: map[string]*resources.Send{
@@ -92,6 +93,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	stdout := &resources.FileRes{
 		BaseRes: resources.BaseRes{
 			Name:       "stdout",
+			Kind:       "file",
 			MetaParams: metaparams,
 			// send->recv!
 			Recv: map[string]*resources.Send{
@@ -107,6 +109,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	stderr := &resources.FileRes{
 		BaseRes: resources.BaseRes{
 			Name:       "stderr",
+			Kind:       "file",
 			MetaParams: metaparams,
 			// send->recv!
 			Recv: map[string]*resources.Send{
@@ -229,10 +232,7 @@ func Run() error {
 		}
 	}()
 
-	if err := obj.Run(); err != nil {
-		return err
-	}
-	return nil
+	return obj.Run()
 }
 
 func main() {

examples/lib/libmgmt-subgraph0.go

@@ -63,6 +63,7 @@ func (obj *MyGAPI) subGraph() (*pgraph.Graph, error) {
 	f1 := &resources.FileRes{
 		BaseRes: resources.BaseRes{
 			Name:       "file1",
+			Kind:       "file",
 			MetaParams: metaparams,
 		},
 		Path: "/tmp/mgmt/sub1",
@@ -74,6 +75,7 @@ func (obj *MyGAPI) subGraph() (*pgraph.Graph, error) {
 	n1 := &resources.NoopRes{
 		BaseRes: resources.BaseRes{
 			Name:       "noop1",
+			Kind:       "noop",
 			MetaParams: metaparams,
 		},
 	}
@@ -93,7 +95,6 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 		return nil, err
 	}
 
-	// FIXME: these are being specified temporarily until it's the default!
 	metaparams := resources.DefaultMetaParams
 
 	content := "I created a subgraph!\n"
@@ -238,10 +239,7 @@ func Run() error {
 		}
 	}()
 
-	if err := obj.Run(); err != nil {
-		return err
-	}
-	return nil
+	return obj.Run()
 }
 
 func main() {

examples/lib/libmgmt-subgraph1.go

@@ -61,13 +61,13 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 		return nil, err
 	}
 
-	// FIXME: these are being specified temporarily until it's the default!
 	metaparams := resources.DefaultMetaParams
 
 	content := "I created a subgraph!\n"
 	f0 := &resources.FileRes{
 		BaseRes: resources.BaseRes{
 			Name:       "README",
+			Kind:       "file",
 			MetaParams: metaparams,
 		},
 		Path:    "/tmp/mgmt/README",
@@ -86,6 +86,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	f1 := &resources.FileRes{
 		BaseRes: resources.BaseRes{
 			Name:       "file1",
+			Kind:       "file",
 			MetaParams: metaparams,
 		},
 		Path: "/tmp/mgmt/sub1",
@@ -97,6 +98,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	n1 := &resources.NoopRes{
 		BaseRes: resources.BaseRes{
 			Name:       "noop1",
+			Kind:       "noop",
 			MetaParams: metaparams,
 		},
 	}
@@ -110,6 +112,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	subGraphRes0 := &resources.GraphRes{ // TODO: should we name this SubGraphRes ?
 		BaseRes: resources.BaseRes{
 			Name:       "subgraph1",
+			Kind:       "graph",
 			MetaParams: metaparams,
 		},
 		Graph: subGraph,
@@ -226,10 +229,7 @@ func Run() error {
 		}
 	}()
 
-	if err := obj.Run(); err != nil {
-		return err
-	}
-	return nil
+	return obj.Run()
 }
 
 func main() {

examples/lib/libmgmt1.go

@@ -57,13 +57,13 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 		return nil, fmt.Errorf("libmgmt: MyGAPI is not initialized")
 	}
 
-	n1 := &resources.NoopRes{
-		BaseRes: resources.BaseRes{
-			Name:       "noop1",
-			MetaParams: resources.DefaultMetaParams,
-		},
+	n1, err := resources.NewNamedResource("noop", "noop1")
+	if err != nil {
+		return nil, err
 	}
 
+	// NOTE: This is considered the legacy method to build graphs. Avoid
+	// importing the legacy `yamlgraph` lib if possible for custom graphs.
 	// we can still build a graph via the yaml method
 	gc := &yamlgraph.GraphConfig{
 		Graph: obj.Name,
@@ -72,7 +72,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 			Exec:  []*resources.ExecRes{},
 			File:  []*resources.FileRes{},
 			Msg:   []*resources.MsgRes{},
-			Noop:  []*resources.NoopRes{n1},
+			Noop:  []*resources.NoopRes{n1.(*resources.NoopRes)},
 			Pkg:   []*resources.PkgRes{},
 			Svc:   []*resources.SvcRes{},
 			Timer: []*resources.TimerRes{},
@@ -190,10 +190,7 @@ func Run() error {
 		}
 	}()
 
-	if err := obj.Run(); err != nil {
-		return err
-	}
-	return nil
+	return obj.Run()
 }
 
 func main() {

examples/lib/libmgmt2.go

@@ -65,11 +65,9 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	}
 	var vertex pgraph.Vertex
 	for i := uint(0); i < obj.Count; i++ {
-		n := &resources.NoopRes{
-			BaseRes: resources.BaseRes{
-				Name:       fmt.Sprintf("noop%d", i),
-				MetaParams: resources.DefaultMetaParams,
-			},
+		n, err := resources.NewNamedResource("noop", fmt.Sprintf("noop%d", i))
+		if err != nil {
+			return nil, err
 		}
 		g.AddVertex(n)
 		if i > 0 {
@@ -186,10 +184,7 @@ func Run(count uint) error {
 		}
 	}()
 
-	if err := obj.Run(); err != nil {
-		return err
-	}
-	return nil
+	return obj.Run()
 }
 
 func main() {

examples/lib/libmgmt3.go

@@ -61,13 +61,13 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 		return nil, err
 	}
 
-	// FIXME: these are being specified temporarily until it's the default!
 	metaparams := resources.DefaultMetaParams
 
 	content := "Delete me to trigger a notification!\n"
 	f0 := &resources.FileRes{
 		BaseRes: resources.BaseRes{
 			Name:       "README",
+			Kind:       "file",
 			MetaParams: metaparams,
 		},
 		Path:    "/tmp/mgmt/README",
@@ -80,6 +80,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	p1 := &resources.PasswordRes{
 		BaseRes: resources.BaseRes{
 			Name:       "password1",
+			Kind:       "password",
 			MetaParams: metaparams,
 		},
 		Length: 8,    // generated string will have this many characters
@@ -90,6 +91,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	f1 := &resources.FileRes{
 		BaseRes: resources.BaseRes{
 			Name:       "file1",
+			Kind:       "file",
 			MetaParams: metaparams,
 			// send->recv!
 			Recv: map[string]*resources.Send{
@@ -106,6 +108,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	n1 := &resources.NoopRes{
 		BaseRes: resources.BaseRes{
 			Name:       "noop1",
+			Kind:       "noop",
 			MetaParams: metaparams,
 		},
 	}
@@ -231,10 +234,7 @@ func Run() error {
 		}
 	}()
 
-	if err := obj.Run(); err != nil {
-		return err
-	}
-	return nil
+	return obj.Run()
 }
 
 func main() {

examples/nspawn1.yaml

@@ -2,6 +2,6 @@
 graph: mygraph
 resources:
   nspawn:
-  - name: mgmt-nspawn1
+  - name: nspawn1
     state: running
 edges: []

examples/nspawn2.yaml

@@ -1,7 +0,0 @@
----
-graph: mygraph
-resources:
-  nspawn:
-  - name: mgmt-nspawn2
-    state: stopped
-edges: []

examples/user1.yaml

@@ -0,0 +1,9 @@
+---
+graph: mygraph
+resources:
+  user:
+  - name: testuser
+    uid: 1002
+    gid: 100
+    state: exists
+edges: []

gapi/gapi.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package gapi defines the interface that graph API generators must meet.

hcl/gapi.go

@@ -0,0 +1,155 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package hcl
+
+import (
+	"fmt"
+	"log"
+	"sync"
+
+	"github.com/purpleidea/mgmt/gapi"
+	"github.com/purpleidea/mgmt/pgraph"
+	"github.com/purpleidea/mgmt/recwatch"
+)
+
+// GAPI ...
+type GAPI struct {
+	File *string
+
+	initialized   bool
+	data          gapi.Data
+	wg            sync.WaitGroup
+	closeChan     chan struct{}
+	configWatcher *recwatch.ConfigWatcher
+}
+
+// NewGAPI ...
+func NewGAPI(data gapi.Data, file *string) (*GAPI, error) {
+	if file == nil {
+		return nil, fmt.Errorf("empty file given")
+	}
+
+	obj := &GAPI{
+		File: file,
+	}
+	return obj, obj.Init(data)
+}
+
+// Init ...
+func (obj *GAPI) Init(d gapi.Data) error {
+	if obj.initialized {
+		return fmt.Errorf("already initialized")
+	}
+
+	if obj.File == nil {
+		return fmt.Errorf("file cannot be nil")
+	}
+
+	obj.data = d
+	obj.closeChan = make(chan struct{})
+	obj.initialized = true
+	obj.configWatcher = recwatch.NewConfigWatcher()
+
+	return nil
+}
+
+// Graph ...
+func (obj *GAPI) Graph() (*pgraph.Graph, error) {
+	config, err := loadHcl(obj.File)
+	if err != nil {
+		return nil, fmt.Errorf("unable to parse graph: %s", err)
+	}
+
+	return graphFromConfig(config, obj.data)
+}
+
+// Next ...
+func (obj *GAPI) Next() chan gapi.Next {
+	ch := make(chan gapi.Next)
+	obj.wg.Add(1)
+
+	go func() {
+		defer obj.wg.Done()
+		defer close(ch)
+		if !obj.initialized {
+			next := gapi.Next{
+				Err:  fmt.Errorf("hcl: GAPI is not initialized"),
+				Exit: true,
+			}
+			ch <- next
+			return
+		}
+		startChan := make(chan struct{}) // start signal
+		close(startChan)                 // kick it off!
+
+		watchChan, configChan := make(chan error), make(chan error)
+		if obj.data.NoConfigWatch {
+			configChan = nil
+		} else {
+			configChan = obj.configWatcher.ConfigWatch(*obj.File) // simple
+		}
+		if obj.data.NoStreamWatch {
+			watchChan = nil
+		} else {
+			watchChan = obj.data.World.ResWatch()
+		}
+
+		for {
+			var err error
+			var ok bool
+
+			select {
+			case <-startChan:
+				startChan = nil
+			case err, ok = <-watchChan:
+			case err, ok = <-configChan:
+				if !ok {
+					return
+				}
+			case <-obj.closeChan:
+				return
+			}
+
+			log.Printf("hcl: generating new graph")
+			next := gapi.Next{
+				Err: err,
+			}
+
+			select {
+			case ch <- next:
+			case <-obj.closeChan:
+				return
+			}
+		}
+	}()
+
+	return ch
+}
+
+// Close ...
+func (obj *GAPI) Close() error {
+	if !obj.initialized {
+		return fmt.Errorf("hcl: GAPI is not initialized")
+	}
+
+	obj.configWatcher.Close()
+	close(obj.closeChan)
+	obj.wg.Wait()
+	obj.initialized = false
+	return nil
+}

hcl/parse.go

@@ -0,0 +1,387 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package hcl
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"strings"
+
+	"github.com/hashicorp/hcl"
+	"github.com/hashicorp/hcl/hcl/ast"
+	"github.com/hashicorp/hil"
+	"github.com/purpleidea/mgmt/gapi"
+	hv "github.com/purpleidea/mgmt/hil"
+	"github.com/purpleidea/mgmt/pgraph"
+	"github.com/purpleidea/mgmt/resources"
+)
+
+type collectorResConfig struct {
+	Kind    string
+	Pattern string
+}
+
+// Config defines the structure of the hcl config.
+type Config struct {
+	Resources []*Resource
+	Edges     []*Edge
+	Collector []collectorResConfig
+}
+
+// vertex is the data structure of a vertex.
+type vertex struct {
+	Kind string `hcl:"kind"`
+	Name string `hcl:"name"`
+}
+
+// Edge defines an edge in hcl.
+type Edge struct {
+	Name   string
+	From   vertex
+	To     vertex
+	Notify bool
+}
+
+// Resources define the state for resources.
+type Resources struct {
+	Resources []resources.Res
+}
+
+// Resource ...
+type Resource struct {
+	Name     string
+	Kind     string
+	resource resources.Res
+	Meta     resources.MetaParams
+	deps     []*Edge
+	rcv      map[string]*hv.ResourceVariable
+}
+
+type key struct {
+	kind, name string
+}
+
+func graphFromConfig(c *Config, data gapi.Data) (*pgraph.Graph, error) {
+	var graph *pgraph.Graph
+	var err error
+
+	graph, err = pgraph.NewGraph("Graph")
+	if err != nil {
+		return nil, fmt.Errorf("unable to create graph from config: %s", err)
+	}
+
+	lookup := make(map[key]pgraph.Vertex)
+
+	var keep []pgraph.Vertex
+	var resourceList []resources.Res
+
+	log.Printf("hcl: parsing %d resources", len(c.Resources))
+	for _, r := range c.Resources {
+		res := r.resource
+		kind := r.resource.GetKind()
+
+		log.Printf("hcl: resource \"%s\" \"%s\"", kind, r.Name)
+		if !strings.HasPrefix(res.GetName(), "@@") {
+			fn := func(v pgraph.Vertex) (bool, error) {
+				return resources.VtoR(v).Compare(res), nil
+			}
+			v, err := graph.VertexMatchFn(fn)
+			if err != nil {
+				return nil, fmt.Errorf("could not match vertex: %s", err)
+			}
+			if v == nil {
+				v = res
+				graph.AddVertex(v)
+			}
+			lookup[key{kind, res.GetName()}] = v
+			keep = append(keep, v)
+		} else if !data.Noop {
+			res.SetName(res.GetName()[2:])
+			res.SetKind(kind)
+			resourceList = append(resourceList, res)
+		}
+	}
+
+	// store in backend (usually etcd)
+	if err := data.World.ResExport(resourceList); err != nil {
+		return nil, fmt.Errorf("Config: Could not export resources: %v", err)
+	}
+
+	// lookup from backend (usually etcd)
+	var hostnameFilter []string // empty to get from everyone
+	kindFilter := []string{}
+	for _, t := range c.Collector {
+		kind := strings.ToLower(t.Kind)
+		kindFilter = append(kindFilter, kind)
+	}
+	// do all the graph look ups in one single step, so that if the backend
+	// database changes, we don't have a partial state of affairs...
+	if len(kindFilter) > 0 { // if kindFilter is empty, don't need to do lookups!
+		var err error
+		resourceList, err = data.World.ResCollect(hostnameFilter, kindFilter)
+		if err != nil {
+			return nil, fmt.Errorf("Config: Could not collect resources: %v", err)
+		}
+	}
+	for _, res := range resourceList {
+		matched := false
+		// see if we find a collect pattern that matches
+		for _, t := range c.Collector {
+			kind := strings.ToLower(t.Kind)
+			// use t.Kind and optionally t.Pattern to collect from storage
+			log.Printf("Collect: %v; Pattern: %v", kind, t.Pattern)
+
+			// XXX: expand to more complex pattern matching here...
+			if res.GetKind() != kind {
+				continue
+			}
+
+			if matched {
+				// we've already matched this resource, should we match again?
+				log.Printf("Config: Warning: Matching %s again!", res)
+			}
+			matched = true
+
+			// collect resources but add the noop metaparam
+			//if noop { // now done in mgmtmain
+			//	res.Meta().Noop = noop
+			//}
+
+			if t.Pattern != "" { // XXX: simplistic for now
+				res.CollectPattern(t.Pattern) // res.Dirname = t.Pattern
+			}
+
+			log.Printf("Collect: %s: collected!", res)
+
+			// XXX: similar to other resource add code:
+			// if _, exists := lookup[kind]; !exists {
+			// 	lookup[kind] = make(map[string]pgraph.Vertex)
+			// }
+
+			fn := func(v pgraph.Vertex) (bool, error) {
+				return resources.VtoR(v).Compare(res), nil
+			}
+			v, err := graph.VertexMatchFn(fn)
+			if err != nil {
+				return nil, fmt.Errorf("could not VertexMatchFn() resource: %s", err)
+			}
+			if v == nil { // no match found
+				v = res            // a standalone res can be a vertex
+				graph.AddVertex(v) // call standalone in case not part of an edge
+			}
+			lookup[key{kind, res.GetName()}] = v // used for constructing edges
+			keep = append(keep, v)               // append
+
+			//break // let's see if another resource even matches
+		}
+	}
+
+	for _, r := range c.Resources {
+		for _, e := range r.deps {
+			if _, ok := lookup[key{strings.ToLower(e.From.Kind), e.From.Name}]; !ok {
+				return nil, fmt.Errorf("can't find 'from' name")
+			}
+			if _, ok := lookup[key{strings.ToLower(e.To.Kind), e.To.Name}]; !ok {
+				return nil, fmt.Errorf("can't find 'to' name")
+			}
+			from := lookup[key{strings.ToLower(e.From.Kind), e.From.Name}]
+			to := lookup[key{strings.ToLower(e.To.Kind), e.To.Name}]
+			edge := &resources.Edge{
+				Name:   e.Name,
+				Notify: e.Notify,
+			}
+			graph.AddEdge(from, to, edge)
+		}
+
+		recv := make(map[string]*resources.Send)
+		// build Rcv's from resource variables
+		for k, v := range r.rcv {
+			send, ok := lookup[key{strings.ToLower(v.Kind), v.Name}]
+			if !ok {
+				return nil, fmt.Errorf("resource not found")
+			}
+
+			recv[strings.ToUpper(string(k[0]))+k[1:]] = &resources.Send{
+				Res: resources.VtoR(send),
+				Key: v.Field,
+			}
+
+			to := lookup[key{strings.ToLower(r.Kind), r.Name}]
+			edge := &resources.Edge{
+				Name:   v.Name,
+				Notify: true,
+			}
+			graph.AddEdge(send, to, edge)
+		}
+
+		r.resource.SetRecv(recv)
+	}
+
+	return graph, nil
+}
+
+func loadHcl(f *string) (*Config, error) {
+	if f == nil {
+		return nil, fmt.Errorf("empty file given")
+	}
+
+	data, err := ioutil.ReadFile(*f)
+	if err != nil {
+		return nil, fmt.Errorf("unable to read file: %v", err)
+	}
+
+	file, err := hcl.ParseBytes(data)
+	if err != nil {
+		return nil, fmt.Errorf("unable to parse file: %s", err)
+	}
+
+	config := new(Config)
+
+	list, ok := file.Node.(*ast.ObjectList)
+	if !ok {
+		return nil, fmt.Errorf("unable to parse file: file does not contain root node object")
+	}
+
+	if resources := list.Filter("resource"); len(resources.Items) > 0 {
+		var err error
+		config.Resources, err = loadResourcesHcl(resources)
+		if err != nil {
+			return nil, fmt.Errorf("unable to parse: %s", err)
+		}
+	}
+
+	return config, nil
+}
+
+func loadResourcesHcl(list *ast.ObjectList) ([]*Resource, error) {
+	list = list.Children()
+	if len(list.Items) == 0 {
+		return nil, nil
+	}
+
+	var result []*Resource
+
+	for _, item := range list.Items {
+		kind := item.Keys[0].Token.Value().(string)
+		name := item.Keys[1].Token.Value().(string)
+
+		var listVal *ast.ObjectList
+		if ot, ok := item.Val.(*ast.ObjectType); ok {
+			listVal = ot.List
+		} else {
+			return nil, fmt.Errorf("module '%s': should be an object", name)
+		}
+
+		var params = resources.DefaultMetaParams
+		if o := listVal.Filter("meta"); len(o.Items) > 0 {
+			err := hcl.DecodeObject(&params, o)
+			if err != nil {
+				return nil, fmt.Errorf(
+					"Error parsing meta for %s: %s",
+					name,
+					err)
+			}
+		}
+
+		var deps []string
+		if edges := listVal.Filter("depends_on"); len(edges.Items) > 0 {
+			err := hcl.DecodeObject(&deps, edges.Items[0].Val)
+			if err != nil {
+				return nil, fmt.Errorf("unable to parse: %s", err)
+			}
+		}
+
+		var edges []*Edge
+		for _, dep := range deps {
+			vertices := strings.Split(dep, ".")
+			edges = append(edges, &Edge{
+				To: vertex{
+					Kind: kind,
+					Name: name,
+				},
+				From: vertex{
+					Kind: vertices[0],
+					Name: vertices[1],
+				},
+			})
+		}
+
+		var config map[string]interface{}
+		if err := hcl.DecodeObject(&config, item.Val); err != nil {
+			log.Printf("hcl: unable to decode body: %v", err)
+			return nil, fmt.Errorf(
+				"Error reading config for %s: %s",
+				name,
+				err)
+		}
+
+		delete(config, "meta")
+		delete(config, "depends_on")
+
+		rcv := make(map[string]*hv.ResourceVariable)
+		// parse strings for hil
+		for k, v := range config {
+			n, err := hil.Parse(v.(string))
+			if err != nil {
+				return nil, fmt.Errorf("unable to parse fields: %v", err)
+			}
+
+			variables, err := hv.ParseVariables(n)
+			if err != nil {
+				return nil, fmt.Errorf("unable to parse variables: %v", err)
+			}
+
+			for _, v := range variables {
+				val, ok := v.(*hv.ResourceVariable)
+				if !ok {
+					continue
+				}
+
+				rcv[k] = val
+			}
+		}
+
+		res, err := resources.NewNamedResource(kind, name)
+		if err != nil {
+			log.Printf("hcl: unable to parse resource: %v", err)
+			return nil, err
+		}
+
+		if err := hcl.DecodeObject(res, item.Val); err != nil {
+			log.Printf("hcl: unable to decode body: %v", err)
+			return nil, fmt.Errorf(
+				"Error reading config for %s: %s",
+				name,
+				err)
+		}
+
+		meta := res.Meta()
+		*meta = params
+
+		result = append(result, &Resource{
+			Name:     name,
+			Kind:     kind,
+			resource: res,
+			deps:     edges,
+			rcv:      rcv,
+		})
+	}
+
+	return result, nil
+}

hil/interpolate.go

@@ -0,0 +1,89 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package hil
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/hashicorp/hil/ast"
+)
+
+// Variable defines an interpolated variable.
+type Variable interface {
+	Key() string
+}
+
+// ResourceVariable defines a variable type used to reference fields of a resource
+// e.g.  ${file.file1.Content}
+type ResourceVariable struct {
+	Kind, Name, Field string
+}
+
+// Key returns a string representation of the variable key.
+func (r *ResourceVariable) Key() string {
+	return fmt.Sprintf("%s.%s.%s", r.Kind, r.Name, r.Field)
+}
+
+// NewInterpolatedVariable takes a variable key and return the interpolated variable
+// of the required type.
+func NewInterpolatedVariable(k string) (Variable, error) {
+	// for now resource variables are the only thing.
+	parts := strings.SplitN(k, ".", 3)
+
+	return &ResourceVariable{
+		Kind:  parts[0],
+		Name:  parts[1],
+		Field: parts[2],
+	}, nil
+}
+
+// ParseVariables will traverse a HIL tree looking for variables and returns a
+// list of them.
+func ParseVariables(tree ast.Node) ([]Variable, error) {
+	var result []Variable
+	var finalErr error
+
+	visitor := func(n ast.Node) ast.Node {
+		if finalErr != nil {
+			return n
+		}
+
+		switch nt := n.(type) {
+		case *ast.VariableAccess:
+			v, err := NewInterpolatedVariable(nt.Name)
+			if err != nil {
+				finalErr = err
+				return n
+			}
+			result = append(result, v)
+		default:
+			return n
+		}
+
+		return n
+	}
+
+	tree.Accept(visitor)
+
+	if finalErr != nil {
+		return nil, finalErr
+	}
+
+	return result, nil
+}

lib/cli.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package lib
@@ -24,6 +24,7 @@ import (
 	"os/signal"
 	"syscall"
 
+	"github.com/purpleidea/mgmt/hcl"
 	"github.com/purpleidea/mgmt/puppet"
 	"github.com/purpleidea/mgmt/yamlgraph"
 	"github.com/purpleidea/mgmt/yamlgraph2"
@@ -89,6 +90,14 @@ func run(c *cli.Context) error {
 			PuppetConf:  c.String("puppet-conf"),
 		}
 	}
+	if h := c.String("hcl"); c.IsSet("hcl") {
+		if obj.GAPI != nil {
+			return fmt.Errorf("can't combine hcl GAPI with existing GAPI")
+		}
+		obj.GAPI = &hcl.GAPI{
+			File: &h,
+		}
+	}
 	obj.Remotes = c.StringSlice("remote") // FIXME: GAPI-ify somehow?
 
 	obj.NoWatch = c.Bool("no-watch")
@@ -222,6 +231,11 @@ func CLI(program, version string, flags Flags) error {
 					Value: "",
 					Usage: "yaml graph definition to run (parser v2)",
 				},
+				cli.StringFlag{
+					Name:  "hcl",
+					Value: "",
+					Usage: "hcl graph definition to run",
+				},
 				cli.StringFlag{
 					Name:  "puppet, p",
 					Value: "",

lib/main.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package lib
@@ -524,6 +524,8 @@ func (obj *Main) Run() error {
 				continue
 			}
 
+			//savedGraph := oldGraph.Copy() // save a copy for errors
+
 			// TODO: should we call each Res.Setup() here instead?
 
 			// add autoedges; modifies the graph only if no error
@@ -537,12 +539,20 @@ func (obj *Main) Run() error {
 				continue
 			}
 
-			graph.Update(oldGraph) // copy in structure of new graph
+			// at this point, any time we error after a destructive
+			// modification of the graph we need to restore the old
+			// graph that was previously running, eg:
+			//
+			//	oldGraph = savedGraph.Copy()
+			//
+			// which we are (luckily) able to avoid testing for now
 
-			resources.AutoGroup(graph.Graph, &resources.NonReachabilityGrouper{}) // run autogroup; modifies the graph
+			resources.AutoGroup(oldGraph, &resources.NonReachabilityGrouper{}) // run autogroup; modifies the graph
 			// TODO: do we want to do a transitive reduction?
 			// FIXME: run a type checker that verifies all the send->recv relationships
 
+			graph.Update(oldGraph) // copy in structure of new graph
+
 			// Call this here because at this point the graph does
 			// not know anything about the prometheus instance.
 			if err := prom.UpdatePgraphStartTime(); err != nil {
@@ -619,6 +629,14 @@ func (obj *Main) Run() error {
 	// TODO: is there any benefit to running the remotes above in the loop?
 	// wait for etcd to be running before we remote in, which we do above!
 	go remotes.Run()
+	// wait for remotes to be ready before continuing...
+	select {
+	case <-remotes.Ready():
+		log.Printf("Main: Remotes: Run: Ready!")
+		// pass
+		//case <-time.After( ? * time.Second):
+		//	obj.Exit(fmt.Errorf("Main: Remotes: Run timeout"))
+	}
 
 	if obj.GAPI == nil {
 		converger.Start() // better start this for empty graphs

main.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package main

misc/make-deps.sh

@@ -80,5 +80,5 @@ if [[ $ret != 0 ]]; then
 fi
 go get golang.org/x/tools/cmd/stringer	# for automatic stringer-ing
 go get github.com/golang/lint/golint	# for `golint`-ing
-go get github.com/alecthomas/gometalinter && gometalinter --install	# bonus
+go get -u gopkg.in/alecthomas/gometalinter.v1 && mv "$(dirname $(which gometalinter.v1))/gometalinter.v1" "$(dirname $(which gometalinter.v1))/gometalinter" && gometalinter --install	# bonus
 cd "$XPWD" >/dev/null

pgp/pgp.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package pgp

pgraph/graphsync.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package pgraph
@@ -23,12 +23,25 @@ import (
 	errwrap "github.com/pkg/errors"
 )
 
+func strVertexCmpFn(v1, v2 Vertex) (bool, error) {
+	if v1.String() == "" || v2.String() == "" {
+		return false, fmt.Errorf("empty vertex")
+	}
+	return v1.String() == v2.String(), nil
+}
+
+func strEdgeCmpFn(e1, e2 Edge) (bool, error) {
+	if e1.String() == "" || e2.String() == "" {
+		return false, fmt.Errorf("empty edge")
+	}
+	return e1.String() == e2.String(), nil
+}
+
 // GraphSync updates the Graph so that it matches the newGraph. It leaves
 // identical elements alone so that they don't need to be refreshed.
 // It tries to mutate existing elements into new ones, if they support this.
 // This updates the Graph on success only.
 // FIXME: should we do this with copies of the vertex resources?
-// FIXME: add test cases
 func (obj *Graph) GraphSync(newGraph *Graph, vertexCmpFn func(Vertex, Vertex) (bool, error), vertexAddFn func(Vertex) error, vertexRemoveFn func(Vertex) error, edgeCmpFn func(Edge, Edge) (bool, error)) error {
 
 	oldGraph := obj.Copy() // work on a copy of the old graph
@@ -41,6 +54,19 @@ func (obj *Graph) GraphSync(newGraph *Graph, vertexCmpFn func(Vertex, Vertex) (b
 	}
 	oldGraph.SetName(newGraph.GetName()) // overwrite the name
 
+	if vertexCmpFn == nil {
+		vertexCmpFn = strVertexCmpFn // use simple string cmp version
+	}
+	if vertexAddFn == nil {
+		vertexAddFn = func(Vertex) error { return nil } // noop
+	}
+	if vertexRemoveFn == nil {
+		vertexRemoveFn = func(Vertex) error { return nil } // noop
+	}
+	if edgeCmpFn == nil {
+		edgeCmpFn = strEdgeCmpFn // use simple string cmp version
+	}
+
 	var lookup = make(map[Vertex]Vertex)
 	var vertexKeep []Vertex // list of vertices which are the same in new graph
 	var edgeKeep []Edge     // list of vertices which are the same in new graph

pgraph/graphsync_test.go

@@ -0,0 +1,92 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package pgraph
+
+import (
+	"testing"
+)
+
+func TestGraphSync1(t *testing.T) {
+	g := &Graph{}
+	v1 := NV("v1")
+	v2 := NV("v2")
+	v3 := NV("v3")
+
+	e1 := NE("e1")
+	e2 := NE("e2")
+	g.AddEdge(v1, v3, e1)
+	g.AddEdge(v2, v3, e2)
+
+	// new graph
+	newGraph := &Graph{}
+	v4 := NV("v4")
+	v5 := NV("v5")
+	e3 := NE("e3")
+	newGraph.AddEdge(v4, v5, e3)
+
+	err := g.GraphSync(newGraph, nil, nil, nil, nil)
+	if err != nil {
+		t.Errorf("GraphSync failed: %v", err)
+		return
+	}
+
+	// g should change and become the same
+	if s := runGraphCmp(t, g, newGraph); s != "" {
+		t.Errorf("%s", s)
+	}
+}
+
+func TestGraphSync2(t *testing.T) {
+	v1 := NV("v1")
+	v2 := NV("v2")
+	v3 := NV("v3")
+	v4 := NV("v4")
+	v5 := NV("v5")
+	e1 := NE("e1")
+	e2 := NE("e2")
+	e3 := NE("e3")
+
+	g := &Graph{}
+	g.AddEdge(v1, v3, e1)
+	g.AddEdge(v2, v3, e2)
+
+	// new graph
+	newGraph := &Graph{}
+	newGraph.AddEdge(v1, v3, e1)
+	newGraph.AddEdge(v2, v3, e2)
+	newGraph.AddEdge(v4, v5, e3)
+	//newGraph.AddEdge(v3, v4, NE("v3,v4"))
+	//newGraph.AddEdge(v3, v5, NE("v3,v5"))
+
+	// graphs should differ!
+	if runGraphCmp(t, g, newGraph) == "" {
+		t.Errorf("graphs should differ initially")
+		return
+	}
+
+	err := g.GraphSync(newGraph, strVertexCmpFn, vertexAddFn, vertexRemoveFn, strEdgeCmpFn)
+	if err != nil {
+		t.Errorf("GraphSync failed: %v", err)
+		return
+	}
+
+	// g should change and become the same
+	if s := runGraphCmp(t, g, newGraph); s != "" {
+		t.Errorf("%s", s)
+	}
+}

pgraph/graphviz.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package pgraph // TODO: this should be a subpackage

pgraph/pgraph.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package pgraph represents the internal "pointer graph" that we use.
@@ -142,7 +142,6 @@ func (g *Graph) AddEdge(v1, v2 Vertex, e Edge) {
 }
 
 // DeleteEdge deletes a particular edge from the graph.
-// FIXME: add test cases
 func (g *Graph) DeleteEdge(e Edge) {
 	for v1 := range g.adjacency {
 		for v2, edge := range g.adjacency[v1] {

pgraph/pgraph_test.go

@@ -3,58 +3,26 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package pgraph
 
 import (
-	"fmt"
 	"reflect"
 	"testing"
 )
 
-// vertex is a test struct to test the library.
-type vertex struct {
-	name string
-}
-
-// String is a required method of the Vertex interface that we must fulfill.
-func (v *vertex) String() string {
-	return v.name
-}
-
-// NV is a helper function to make testing easier. It creates a new noop vertex.
-func NV(s string) Vertex {
-	return &vertex{s}
-}
-
-// edge is a test struct to test the library.
-type edge struct {
-	name string
-}
-
-// String is a required method of the Edge interface that we must fulfill.
-func (e *edge) String() string {
-	return e.name
-}
-
-// NE is a helper function to make testing easier. It creates a new noop edge.
-func NE(s string) Edge {
-	return &edge{s}
-}
-
-func TestPgraphT1(t *testing.T) {
-
+func TestCount1(t *testing.T) {
 	G := &Graph{}
 
 	if i := G.NumVertices(); i != 0 {
@@ -79,8 +47,7 @@ func TestPgraphT1(t *testing.T) {
 	}
 }
 
-func TestPgraphT2(t *testing.T) {
-
+func TestAddVertex1(t *testing.T) {
 	G := &Graph{Name: "g2"}
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -106,8 +73,7 @@ func TestPgraphT2(t *testing.T) {
 	}
 }
 
-func TestPgraphT3(t *testing.T) {
-
+func TestDFS1(t *testing.T) {
 	G, _ := NewGraph("g3")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -147,8 +113,7 @@ func TestPgraphT3(t *testing.T) {
 	}
 }
 
-func TestPgraphT4(t *testing.T) {
-
+func TestDFS2(t *testing.T) {
 	G, _ := NewGraph("g4")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -170,7 +135,7 @@ func TestPgraphT4(t *testing.T) {
 	}
 }
 
-func TestPgraphT5(t *testing.T) {
+func TestFilterGraph1(t *testing.T) {
 	G, _ := NewGraph("g5")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -203,7 +168,7 @@ func TestPgraphT5(t *testing.T) {
 	}
 }
 
-func TestPgraphT6(t *testing.T) {
+func TestDisconnectedGraphs1(t *testing.T) {
 	G, _ := NewGraph("g6")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -235,8 +200,7 @@ func TestPgraphT6(t *testing.T) {
 	}
 }
 
-func TestPgraphT7(t *testing.T) {
-
+func TestDeleteVertex1(t *testing.T) {
 	G, _ := NewGraph("g7")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -277,8 +241,17 @@ func TestPgraphT7(t *testing.T) {
 	}
 }
 
-func TestPgraphT8(t *testing.T) {
+func TestDeleteVertex2(t *testing.T) {
+	G := &Graph{}
+	v1 := NV("v1")
+	G.DeleteVertex(v1) // check this doesn't panic
 
+	if i := G.NumVertices(); i != 0 {
+		t.Errorf("should have 0 vertices instead of: %d", i)
+	}
+}
+
+func TestVertexContains1(t *testing.T) {
 	v1 := NV("v1")
 	v2 := NV("v2")
 	v3 := NV("v3")
@@ -306,8 +279,7 @@ func TestPgraphT8(t *testing.T) {
 	}
 }
 
-func TestPgraphT9(t *testing.T) {
-
+func TestTopoSort1(t *testing.T) {
 	G, _ := NewGraph("g9")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -382,8 +354,7 @@ func TestPgraphT9(t *testing.T) {
 	}
 }
 
-func TestPgraphT10(t *testing.T) {
-
+func TestTopoSort2(t *testing.T) {
 	G, _ := NewGraph("g10")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -410,7 +381,7 @@ func TestPgraphT10(t *testing.T) {
 }
 
 // empty
-func TestPgraphReachability0(t *testing.T) {
+func TestReachability0(t *testing.T) {
 	{
 		G, _ := NewGraph("g")
 		result := G.Reachability(nil, nil)
@@ -474,7 +445,7 @@ func TestPgraphReachability0(t *testing.T) {
 }
 
 // simple linear path
-func TestPgraphReachability1(t *testing.T) {
+func TestReachability1(t *testing.T) {
 	G, _ := NewGraph("g")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -508,7 +479,7 @@ func TestPgraphReachability1(t *testing.T) {
 }
 
 // pick one of two correct paths
-func TestPgraphReachability2(t *testing.T) {
+func TestReachability2(t *testing.T) {
 	G, _ := NewGraph("g")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -545,7 +516,7 @@ func TestPgraphReachability2(t *testing.T) {
 }
 
 // pick shortest path
-func TestPgraphReachability3(t *testing.T) {
+func TestReachability3(t *testing.T) {
 	G, _ := NewGraph("g")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -580,7 +551,7 @@ func TestPgraphReachability3(t *testing.T) {
 }
 
 // direct path
-func TestPgraphReachability4(t *testing.T) {
+func TestReachability4(t *testing.T) {
 	G, _ := NewGraph("g")
 	v1 := NV("v1")
 	v2 := NV("v2")
@@ -614,7 +585,7 @@ func TestPgraphReachability4(t *testing.T) {
 	}
 }
 
-func TestPgraphT11(t *testing.T) {
+func TestReverse1(t *testing.T) {
 	v1 := NV("v1")
 	v2 := NV("v2")
 	v3 := NV("v3")
@@ -639,7 +610,7 @@ func TestPgraphT11(t *testing.T) {
 	}
 }
 
-func TestPgraphCopy1(t *testing.T) {
+func TestCopy1(t *testing.T) {
 	g1 := &Graph{}
 	g2 := g1.Copy() // check this doesn't panic
 	if !reflect.DeepEqual(g1.String(), g2.String()) {
@@ -647,31 +618,7 @@ func TestPgraphCopy1(t *testing.T) {
 	}
 }
 
-func TestPgraphDelete1(t *testing.T) {
-	G := &Graph{}
-	v1 := NV("v1")
-	G.DeleteVertex(v1) // check this doesn't panic
-
-	if i := G.NumVertices(); i != 0 {
-		t.Errorf("should have 0 vertices instead of: %d", i)
-	}
-}
-
-func vertexCmpFn(v1, v2 Vertex) (bool, error) {
-	if v1.String() == "" || v2.String() == "" {
-		return false, fmt.Errorf("oops, empty vertex")
-	}
-	return v1.String() == v2.String(), nil
-}
-
-func edgeCmpFn(e1, e2 Edge) (bool, error) {
-	if e1.String() == "" || e2.String() == "" {
-		return false, fmt.Errorf("oops, empty edge")
-	}
-	return e1.String() == e2.String(), nil
-}
-
-func TestPgraphGraphCmp1(t *testing.T) {
+func TestGraphCmp1(t *testing.T) {
 	g1 := &Graph{}
 	g2 := &Graph{}
 	g3 := &Graph{}
@@ -679,20 +626,20 @@ func TestPgraphGraphCmp1(t *testing.T) {
 	g4 := &Graph{}
 	g4.AddVertex(NV("v2"))
 
-	if err := g1.GraphCmp(g2, vertexCmpFn, edgeCmpFn); err != nil {
+	if err := g1.GraphCmp(g2, strVertexCmpFn, strEdgeCmpFn); err != nil {
 		t.Errorf("should have no error during GraphCmp, but got: %v", err)
 	}
 
-	if err := g1.GraphCmp(g3, vertexCmpFn, edgeCmpFn); err == nil {
+	if err := g1.GraphCmp(g3, strVertexCmpFn, strEdgeCmpFn); err == nil {
 		t.Errorf("should have error during GraphCmp, but got nil")
 	}
 
-	if err := g3.GraphCmp(g4, vertexCmpFn, edgeCmpFn); err == nil {
+	if err := g3.GraphCmp(g4, strVertexCmpFn, strEdgeCmpFn); err == nil {
 		t.Errorf("should have error during GraphCmp, but got nil")
 	}
 }
 
-func TestPgraphSort0(t *testing.T) {
+func TestSort0(t *testing.T) {
 	vs := []Vertex{}
 	s := Sort(vs)
 
@@ -710,7 +657,7 @@ func TestPgraphSort0(t *testing.T) {
 	}
 }
 
-func TestPgraphSort1(t *testing.T) {
+func TestSort1(t *testing.T) {
 	v1 := NV("v1")
 	v2 := NV("v2")
 	v3 := NV("v3")
@@ -739,3 +686,84 @@ func TestPgraphSort1(t *testing.T) {
 		t.Errorf(str)
 	}
 }
+
+func TestDeleteEdge1(t *testing.T) {
+	g, _ := NewGraph("g")
+
+	v1 := NV("v1")
+	v2 := NV("v2")
+	v3 := NV("v3")
+
+	e1 := NE("e1")
+	e2 := NE("e2")
+	e3 := NE("e3")
+	e4 := NE("e4")
+	e5 := NE("e5")
+	e6 := NE("e6")
+
+	g.AddEdge(v1, v2, e1)
+	g.AddEdge(v2, v3, e2)
+	g.AddEdge(v1, v3, e3)
+	g.AddEdge(v2, v1, e4)
+	g.AddEdge(v3, v2, e5)
+	g.AddEdge(v3, v1, e6)
+
+	g.DeleteEdge(e1)
+	g.DeleteEdge(e2)
+	g.DeleteEdge(e3)
+	g.DeleteEdge(e3)
+
+	if g.NumEdges() != 3 {
+		t.Errorf("expected number of edges: 3, instead of: %d", g.NumEdges())
+	}
+}
+
+func TestDeleteEdge2(t *testing.T) {
+	g, _ := NewGraph("g")
+
+	v1 := NV("v1")
+	v2 := NV("v2")
+	v3 := NV("v3")
+	v4 := NV("v4")
+
+	e1 := NE("e1")
+	e2 := NE("e2")
+	e3 := NE("e3")
+	e4 := NE("e4")
+	e5 := NE("e5")
+	e6 := NE("e6")
+	e7 := NE("e7")
+
+	g.AddEdge(v1, v2, e1)
+	g.AddEdge(v1, v2, e2)
+	g.AddEdge(v1, v3, e3)
+	g.AddEdge(v1, v4, e4)
+	g.AddEdge(v2, v1, e5)
+	g.AddEdge(v3, v1, e6)
+	g.AddEdge(v4, v1, e7)
+
+	g.DeleteEdge(e1)
+	g.DeleteEdge(e2)
+	g.DeleteEdge(e3)
+	g.DeleteEdge(e5)
+	g.DeleteEdge(e6)
+
+	ie := g.IncomingGraphEdges(v1)
+	oe := g.OutgoingGraphEdges(v1)
+
+	if !reflect.DeepEqual(ie, []Edge{e7}) {
+		res := ""
+		for _, e := range ie {
+			res += e.String() + " "
+		}
+		t.Errorf("expected incoming graph edges for vertex v1: e7, instead of: %s", res)
+	}
+
+	if !reflect.DeepEqual(oe, []Edge{e4}) {
+		res := ""
+		for _, e := range oe {
+			res += e.String() + " "
+		}
+		t.Errorf("expected outgoing graph edges for vertex v1: e4, instead of: %s", res)
+	}
+}

pgraph/subgraph.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package pgraph

pgraph/subgraph_test.go

@@ -3,58 +3,25 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package pgraph
 
 import (
-	"fmt"
 	"testing"
 )
 
-// TODO: unify with the other function like this...
-// TODO: where should we put our test helpers?
-func runGraphCmp(t *testing.T, g1, g2 *Graph) {
-	err := g1.GraphCmp(g2, vertexCmpFn, edgeCmpFn)
-	if err != nil {
-		t.Logf("  actual (g1): %v%v", g1, fullPrint(g1))
-		t.Logf("expected (g2): %v%v", g2, fullPrint(g2))
-		t.Logf("Cmp error:")
-		t.Errorf("%v", err)
-	}
-}
-
-// TODO: unify with the other function like this...
-func fullPrint(g *Graph) (str string) {
-	str += "\n"
-	for v := range g.Adjacency() {
-		str += fmt.Sprintf("* v: %s\n", v)
-	}
-	for v1 := range g.Adjacency() {
-		for v2, e := range g.Adjacency()[v1] {
-			str += fmt.Sprintf("* e: %s -> %s # %s\n", v1, v2, e)
-		}
-	}
-	return
-}
-
-// edgeGenFn generates unique edges for each vertex pair, assuming unique
-// vertices.
-func edgeGenFn(v1, v2 Vertex) Edge {
-	return NE(fmt.Sprintf("%s,%s", v1, v2))
-}
-
-func TestPgraphAddEdgeGraph1(t *testing.T) {
+func TestAddEdgeGraph1(t *testing.T) {
 	v1 := NV("v1")
 	v2 := NV("v2")
 	v3 := NV("v3")
@@ -82,10 +49,12 @@ func TestPgraphAddEdgeGraph1(t *testing.T) {
 	//expected.AddEdge(v3, v4, NE("v3,v4"))
 	//expected.AddEdge(v3, v5, NE("v3,v5"))
 
-	runGraphCmp(t, g, expected)
+	if s := runGraphCmp(t, g, expected); s != "" {
+		t.Errorf("%s", s)
+	}
 }
 
-func TestPgraphAddEdgeVertexGraph1(t *testing.T) {
+func TestAddEdgeVertexGraph1(t *testing.T) {
 	v1 := NV("v1")
 	v2 := NV("v2")
 	v3 := NV("v3")
@@ -113,10 +82,12 @@ func TestPgraphAddEdgeVertexGraph1(t *testing.T) {
 	expected.AddEdge(v3, v4, NE("v3,v4"))
 	expected.AddEdge(v3, v5, NE("v3,v5"))
 
-	runGraphCmp(t, g, expected)
+	if s := runGraphCmp(t, g, expected); s != "" {
+		t.Errorf("%s", s)
+	}
 }
 
-func TestPgraphAddEdgeGraphVertex1(t *testing.T) {
+func TestAddEdgeGraphVertex1(t *testing.T) {
 	v1 := NV("v1")
 	v2 := NV("v2")
 	v3 := NV("v3")
@@ -144,10 +115,12 @@ func TestPgraphAddEdgeGraphVertex1(t *testing.T) {
 	expected.AddEdge(v4, v3, NE("v4,v3"))
 	expected.AddEdge(v5, v3, NE("v5,v3"))
 
-	runGraphCmp(t, g, expected)
+	if s := runGraphCmp(t, g, expected); s != "" {
+		t.Errorf("%s", s)
+	}
 }
 
-func TestPgraphAddEdgeVertexGraphLight1(t *testing.T) {
+func TestAddEdgeVertexGraphLight1(t *testing.T) {
 	v1 := NV("v1")
 	v2 := NV("v2")
 	v3 := NV("v3")
@@ -175,10 +148,12 @@ func TestPgraphAddEdgeVertexGraphLight1(t *testing.T) {
 	expected.AddEdge(v3, v4, NE("v3,v4"))
 	//expected.AddEdge(v3, v5, NE("v3,v5")) // not needed with light
 
-	runGraphCmp(t, g, expected)
+	if s := runGraphCmp(t, g, expected); s != "" {
+		t.Errorf("%s", s)
+	}
 }
 
-func TestPgraphAddEdgeGraphVertexLight1(t *testing.T) {
+func TestAddEdgeGraphVertexLight1(t *testing.T) {
 	v1 := NV("v1")
 	v2 := NV("v2")
 	v3 := NV("v3")
@@ -206,5 +181,7 @@ func TestPgraphAddEdgeGraphVertexLight1(t *testing.T) {
 	//expected.AddEdge(v4, v3, NE("v4,v3")) // not needed with light
 	expected.AddEdge(v5, v3, NE("v5,v3"))
 
-	runGraphCmp(t, g, expected)
+	if s := runGraphCmp(t, g, expected); s != "" {
+		t.Errorf("%s", s)
+	}
 }

pgraph/util_test.go

@@ -0,0 +1,93 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package pgraph
+
+import (
+	"fmt"
+	"testing"
+)
+
+// vertex is a test struct to test the library.
+type vertex struct {
+	name string
+}
+
+// String is a required method of the Vertex interface that we must fulfill.
+func (v *vertex) String() string {
+	return v.name
+}
+
+// NV is a helper function to make testing easier. It creates a new noop vertex.
+func NV(s string) Vertex {
+	return &vertex{s}
+}
+
+// edge is a test struct to test the library.
+type edge struct {
+	name string
+}
+
+// String is a required method of the Edge interface that we must fulfill.
+func (e *edge) String() string {
+	return e.name
+}
+
+// NE is a helper function to make testing easier. It creates a new noop edge.
+func NE(s string) Edge {
+	return &edge{s}
+}
+
+// edgeGenFn generates unique edges for each vertex pair, assuming unique
+// vertices.
+func edgeGenFn(v1, v2 Vertex) Edge {
+	return NE(fmt.Sprintf("%s,%s", v1, v2))
+}
+
+func vertexAddFn(v Vertex) error {
+	return nil
+}
+
+func vertexRemoveFn(v Vertex) error {
+	return nil
+}
+
+func runGraphCmp(t *testing.T, g1, g2 *Graph) string {
+	err := g1.GraphCmp(g2, strVertexCmpFn, strEdgeCmpFn)
+	if err != nil {
+		str := ""
+		str += fmt.Sprintf("  actual (g1): %v%s", g1, fullPrint(g1))
+		str += fmt.Sprintf("expected (g2): %v%s", g2, fullPrint(g2))
+		str += fmt.Sprintf("cmp error:")
+		str += fmt.Sprintf("%v", err)
+		return str
+	}
+	return ""
+}
+
+func fullPrint(g *Graph) (str string) {
+	str += "\n"
+	for v := range g.Adjacency() {
+		str += fmt.Sprintf("* v: %s\n", v)
+	}
+	for v1 := range g.Adjacency() {
+		for v2, e := range g.Adjacency()[v1] {
+			str += fmt.Sprintf("* e: %s -> %s # %s\n", v1, v2, e)
+		}
+	}
+	return
+}

prometheus/prometheus.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package prometheus provides functions that are useful to control and manage

puppet/gapi.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package puppet

puppet/puppet.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package puppet provides the integration entrypoint for the puppet language.

recwatch/configwatch.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package recwatch

recwatch/flags.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package recwatch

recwatch/recwatch.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package recwatch provides recursive file watching events via fsnotify.

remote/remote.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package remote provides the remoting facilities for agentless execution.
@@ -692,7 +692,7 @@ type Remotes struct {
 	fileWatch    chan string
 	cConns       uint16 // number of concurrent ssh connections, zero means unlimited
 	interactive  bool   // allow interactive prompting
-	sshPrivIdRsa string // path to ~/.ssh/id_rsa
+	sshPrivIDRsa string // path to ~/.ssh/id_rsa
 	caching      bool   // whether to try and cache the copy of the binary
 	depth        uint16 // depth of this node in the remote execution hierarchy
 	prefix       string // folder prefix to use for misc storage
@@ -702,6 +702,7 @@ type Remotes struct {
 	wg                 sync.WaitGroup       // keep track of each running SSH connection
 	lock               sync.Mutex           // mutex for access to sshmap
 	sshmap             map[string]*SSH      // map to each SSH struct with the remote as the key
+	running            chan struct{}        // closes when main loop is running
 	exiting            bool                 // flag to let us know if we're exiting
 	exitChan           chan struct{}        // closes when we should exit
 	semaphore          *semaphore.Semaphore // counting semaphore to limit concurrent connections
@@ -714,7 +715,7 @@ type Remotes struct {
 }
 
 // NewRemotes builds a Remotes struct.
-func NewRemotes(clientURLs, remoteURLs []string, noop bool, remotes []string, fileWatch chan string, cConns uint16, interactive bool, sshPrivIdRsa string, caching bool, depth uint16, prefix string, converger cv.Converger, convergerCb func(func(map[string]bool) error) (func(), error), flags Flags) *Remotes {
+func NewRemotes(clientURLs, remoteURLs []string, noop bool, remotes []string, fileWatch chan string, cConns uint16, interactive bool, sshPrivIDRsa string, caching bool, depth uint16, prefix string, converger cv.Converger, convergerCb func(func(map[string]bool) error) (func(), error), flags Flags) *Remotes {
 	return &Remotes{
 		clientURLs:   clientURLs,
 		remoteURLs:   remoteURLs,
@@ -723,13 +724,14 @@ func NewRemotes(clientURLs, remoteURLs []string, noop bool, remotes []string, fi
 		fileWatch:    fileWatch,
 		cConns:       cConns,
 		interactive:  interactive,
-		sshPrivIdRsa: sshPrivIdRsa,
+		sshPrivIDRsa: sshPrivIDRsa,
 		caching:      caching,
 		depth:        depth,
 		prefix:       prefix,
 		converger:    converger,
 		convergerCb:  convergerCb,
 		sshmap:       make(map[string]*SSH),
+		running:      make(chan struct{}),
 		exitChan:     make(chan struct{}),
 		semaphore:    semaphore.NewSemaphore(int(cConns)),
 		hostnames:    make([]string, len(remotes)),
@@ -830,18 +832,18 @@ func (obj *Remotes) NewSSH(file string) (*SSH, error) {
 
 // sshKeyAuth is a helper function to get the ssh key auth struct needed
 func (obj *Remotes) sshKeyAuth() (ssh.AuthMethod, error) {
-	if obj.sshPrivIdRsa == "" {
+	if obj.sshPrivIDRsa == "" {
 		return nil, fmt.Errorf("empty path specified")
 	}
 	p := ""
 	// TODO: this doesn't match strings of the form: ~james/.ssh/id_rsa
-	if strings.HasPrefix(obj.sshPrivIdRsa, "~/") {
+	if strings.HasPrefix(obj.sshPrivIDRsa, "~/") {
 		usr, err := user.Current()
 		if err != nil {
 			log.Printf("Remote: Can't find home directory automatically.")
 			return nil, err
 		}
-		p = path.Join(usr.HomeDir, obj.sshPrivIdRsa[len("~/"):])
+		p = path.Join(usr.HomeDir, obj.sshPrivIDRsa[len("~/"):])
 	}
 	if p == "" {
 		return nil, fmt.Errorf("empty path specified")
@@ -1022,11 +1024,17 @@ func (obj *Remotes) Run() {
 		}(sshobj, f)
 		obj.lock.Unlock()
 	}
+	close(obj.running) // notify
 }
 
+// Ready closes its returned channel when the Run method is up and ready. It is
+// useful to know when ready, since we often execute Run in a go routine.
+func (obj *Remotes) Ready() <-chan struct{} { return obj.running }
+
 // Exit causes as much of the Remotes struct to shutdown as quickly and as
 // cleanly as possible. It only returns once everything is shutdown.
 func (obj *Remotes) Exit() error {
+	<-obj.running // wait for Run to be finished before we exit!
 	obj.lock.Lock()
 	obj.exiting = true // don't spawn new ones once this flag is set!
 	obj.lock.Unlock()

resources/actions.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/augeas.go

@@ -3,23 +3,23 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 // +build !noaugeas
 
 package resources
 
 import (
-	"encoding/gob"
 	"fmt"
 	"log"
 	"os"
@@ -39,7 +39,6 @@ const (
 )
 
 func init() {
-	gob.Register(&AugeasRes{})
 	RegisterResource("augeas", func() Res { return &AugeasRes{} })
 }
 
@@ -94,7 +93,6 @@ func (obj *AugeasRes) Validate() error {
 
 // Init initiates the resource.
 func (obj *AugeasRes) Init() error {
-	obj.BaseRes.Kind = "augeas"
 	return obj.BaseRes.Init() // call base init, b/c we're overriding
 }
 

resources/augeas_disabled.go

@@ -3,17 +3,18 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 // +build noaugeas
 
 package resources

resources/autoedge.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/autogroup.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/autogroup_test.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
@@ -108,6 +108,7 @@ func NewNoopResTest(name string) *NoopResTest {
 		NoopRes: NoopRes{
 			BaseRes: BaseRes{
 				Name: name,
+				Kind: "noop",
 				MetaParams: MetaParams{
 					AutoGroup: true, // always autogroup
 				},

resources/aws_ec2.go

@@ -0,0 +1,653 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package resources
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"sync"
+	"time"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/ec2"
+	errwrap "github.com/pkg/errors"
+)
+
+func init() {
+	RegisterResource("aws:ec2", func() Res { return &AwsEc2Res{} })
+}
+
+// AwsPrefix is a const which gets prepended onto the instance name.
+const AwsPrefix = "mgmt:"
+
+// AwsRegions is a list of all AWS regions generated using ec2.DescribeRegions.
+// cn-north-1 and us-gov-west-1 are not returned, probably due to security.
+// List available at http://docs.aws.amazon.com/general/latest/gr/rande.html
+var AwsRegions = []string{
+	"ap-northeast-1",
+	"ap-northeast-2",
+	"ap-south-1",
+	"ap-southeast-1",
+	"ap-southeast-2",
+	"ca-central-1",
+	"cn-north-1",
+	"eu-central-1",
+	"eu-west-1",
+	"eu-west-2",
+	"sa-east-1",
+	"us-east-1",
+	"us-east-2",
+	"us-gov-west-1",
+	"us-west-1",
+	"us-west-2",
+}
+
+// AwsEc2Res is an AWS EC2 resource. In order to create a client session, your
+// AWS credentials must be present in ~/.aws - For detailed instructions see
+// http://docs.aws.amazon.com/cli/latest/userguide/cli-config-files.html
+type AwsEc2Res struct {
+	BaseRes `yaml:",inline"`
+	State   string `yaml:"state"` // state: running, stopped, terminated
+	Region  string `yaml:"region"`
+	Type    string `yaml:"type"` // the ec2 instance type, ie. t2.micro
+	ImageID string `yaml:"imageid"`
+
+	client *ec2.EC2 // client session for AWS API calls
+}
+
+// Default returns some sensible defaults for this resource.
+func (obj *AwsEc2Res) Default() Res {
+	return &AwsEc2Res{
+		BaseRes: BaseRes{
+			MetaParams: DefaultMetaParams, // force a default
+		},
+	}
+}
+
+// Validate if the params passed in are valid data.
+func (obj *AwsEc2Res) Validate() error {
+	if obj.State != "running" && obj.State != "stopped" && obj.State != "terminated" {
+		return fmt.Errorf("state must be 'running', 'stopped' or 'terminated'")
+	}
+
+	// compare obj.Region to the list of available AWS endpoints.
+	validRegion := false
+	for _, region := range AwsRegions {
+		if obj.Region == region {
+			validRegion = true
+			break
+		}
+	}
+	if !validRegion {
+		return fmt.Errorf("region must be a valid AWS endpoint")
+	}
+
+	// check the instance type
+	// there is currently no api call to enumerate available instance types
+	if obj.Type == "" {
+		return fmt.Errorf("no instance type specified")
+	}
+
+	// check imageId against a list of available images
+	sess, err := session.NewSession(&aws.Config{
+		Region: aws.String(obj.Region),
+	})
+	if err != nil {
+		return errwrap.Wrapf(err, "error creating session")
+	}
+	client := ec2.New(sess)
+
+	imagesInput := &ec2.DescribeImagesInput{}
+	images, err := client.DescribeImages(imagesInput)
+	if err != nil {
+		return errwrap.Wrapf(err, "error describing images")
+	}
+	validImage := false
+	for _, image := range images.Images {
+		if obj.ImageID == *image.ImageId {
+			validImage = true
+			break
+		}
+	}
+	if !validImage {
+		return fmt.Errorf("imageid must be a valid ami available in the specified region")
+	}
+
+	return obj.BaseRes.Validate()
+}
+
+// Init initializes the resource.
+func (obj *AwsEc2Res) Init() error {
+	// create a client session for the AWS API
+	sess, err := session.NewSession(&aws.Config{
+		Region: aws.String(obj.Region),
+	})
+	if err != nil {
+		return errwrap.Wrapf(err, "error creating session")
+	}
+	obj.client = ec2.New(sess)
+
+	return obj.BaseRes.Init() // call base init, b/c we're overriding
+}
+
+// Watch is the primary listener for this resource and it outputs events.
+func (obj *AwsEc2Res) Watch() error {
+	send := false
+	var exit *error
+	if err := obj.Running(); err != nil {
+		return err
+	}
+	type chanStruct struct {
+		str string
+		err error
+	}
+	awsChan := make(chan *chanStruct)
+	closeChan := make(chan struct{})
+	ctx, cancel := context.WithCancel(context.TODO())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		select {
+		case <-closeChan:
+			cancel()
+		}
+	}()
+	wg.Add(1)
+	defer wg.Wait()
+	go func() {
+		defer wg.Done()
+		defer close(awsChan)
+		for {
+			diInput := &ec2.DescribeInstancesInput{
+				Filters: []*ec2.Filter{
+					{
+						Name:   aws.String("tag:Name"),
+						Values: []*string{aws.String(obj.prependName())},
+					},
+					{
+						Name: aws.String("instance-state-name"),
+						Values: []*string{
+							aws.String("pending"),
+							aws.String("running"),
+							aws.String("stopping"),
+							aws.String("stopped"),
+						},
+					},
+				},
+			}
+			diOutput, err := obj.client.DescribeInstances(diInput)
+			if err != nil {
+				select {
+				case awsChan <- &chanStruct{
+					err: errwrap.Wrapf(err, "error describing instances"),
+				}:
+				case <-closeChan:
+				}
+				return
+			}
+			if obj.State == "running" {
+				stoppedInput := &ec2.DescribeInstancesInput{
+					Filters: []*ec2.Filter{
+						{
+							Name:   aws.String("tag:Name"),
+							Values: []*string{aws.String(obj.prependName())},
+						},
+						{
+							Name: aws.String("instance-state-name"),
+							Values: []*string{
+								aws.String("stopped"),
+							},
+						},
+					},
+				}
+				stoppedOutput, err := obj.client.DescribeInstances(stoppedInput)
+				if err != nil {
+					select {
+					case awsChan <- &chanStruct{
+						err: errwrap.Wrapf(err, "error describing instances"),
+					}:
+					case <-closeChan:
+					}
+					return
+				}
+				if len(diOutput.Reservations) == 1 && len(stoppedOutput.Reservations) == 0 {
+					waitInput := &ec2.DescribeInstancesInput{
+						InstanceIds: []*string{diOutput.Reservations[0].Instances[0].InstanceId},
+						Filters: []*ec2.Filter{
+							{
+								Name: aws.String("instance-state-name"),
+								Values: []*string{
+									aws.String("stopped"),
+									aws.String("terminated"),
+								},
+							},
+						},
+					}
+					log.Printf("%s: Watching: %s", obj, *diOutput.Reservations[0].Instances[0].InstanceId)
+					if err := obj.client.WaitUntilInstanceStoppedWithContext(ctx, waitInput); err != nil {
+						if aerr, ok := err.(awserr.Error); ok {
+							if aerr.Code() == request.CanceledErrorCode {
+								log.Printf("%s: Request cancelled", obj)
+							}
+						}
+						select {
+						case awsChan <- &chanStruct{
+							err: errwrap.Wrapf(err, "unknown error waiting for instance to stop"),
+						}:
+						case <-closeChan:
+						}
+						return
+					}
+					stateOutput, err := obj.client.DescribeInstances(diInput)
+					if err != nil {
+						select {
+						case awsChan <- &chanStruct{
+							err: errwrap.Wrapf(err, "error describing instances"),
+						}:
+						case <-closeChan:
+						}
+						return
+					}
+					var stateName string
+					if len(stateOutput.Reservations) == 1 {
+						stateName = *stateOutput.Reservations[0].Instances[0].State.Name
+					}
+					if len(stateOutput.Reservations) == 0 || (len(stateOutput.Reservations) == 1 && stateName != "running") {
+						select {
+						case awsChan <- &chanStruct{
+							str: "stopped",
+						}:
+						case <-closeChan:
+							return
+						}
+					}
+				}
+			}
+			if obj.State == "stopped" {
+				runningInput := &ec2.DescribeInstancesInput{
+					Filters: []*ec2.Filter{
+						{
+							Name:   aws.String("tag:Name"),
+							Values: []*string{aws.String(obj.prependName())},
+						},
+						{
+							Name: aws.String("instance-state-name"),
+							Values: []*string{
+								aws.String("running"),
+							},
+						},
+					},
+				}
+				runningOutput, err := obj.client.DescribeInstances(runningInput)
+				if err != nil {
+					select {
+					case awsChan <- &chanStruct{
+						err: errwrap.Wrapf(err, "error describing instances"),
+					}:
+					case <-closeChan:
+					}
+					return
+				}
+				if len(diOutput.Reservations) == 1 && len(runningOutput.Reservations) == 0 {
+					waitInput := &ec2.DescribeInstancesInput{
+						InstanceIds: []*string{diOutput.Reservations[0].Instances[0].InstanceId},
+						Filters: []*ec2.Filter{
+							{
+								Name:   aws.String("instance-state-name"),
+								Values: []*string{aws.String("running")},
+							},
+						},
+					}
+					log.Printf("%s: watching: %s", obj, *diOutput.Reservations[0].Instances[0].InstanceId)
+					if err := obj.client.WaitUntilInstanceRunningWithContext(ctx, waitInput); err != nil {
+						if aerr, ok := err.(awserr.Error); ok {
+							if aerr.Code() == request.CanceledErrorCode {
+								log.Printf("%s: Request cancelled", obj)
+							}
+						}
+						select {
+						case awsChan <- &chanStruct{
+							err: errwrap.Wrapf(err, "unknown error waiting for instance to start"),
+						}:
+						case <-closeChan:
+						}
+						return
+					}
+					stateOutput, err := obj.client.DescribeInstances(diInput)
+					if err != nil {
+						select {
+						case awsChan <- &chanStruct{
+							err: errwrap.Wrapf(err, "error describing instances"),
+						}:
+						case <-closeChan:
+						}
+						return
+					}
+					var stateName string
+					if len(stateOutput.Reservations) == 1 {
+						stateName = *stateOutput.Reservations[0].Instances[0].State.Name
+					}
+					if len(stateOutput.Reservations) == 0 || (len(stateOutput.Reservations) == 1 && stateName != "stopped") {
+						select {
+						case awsChan <- &chanStruct{
+							str: "running",
+						}:
+						case <-closeChan:
+							return
+						}
+					}
+				}
+			}
+			if obj.State == "terminated" {
+				obj.client.WaitUntilInstanceExistsWithContext(ctx, diInput)
+				if err := obj.client.WaitUntilInstanceExistsWithContext(ctx, diInput); err != nil {
+					if aerr, ok := err.(awserr.Error); ok {
+						if aerr.Code() == request.CanceledErrorCode {
+							log.Printf("%s: Request cancelled", obj)
+						}
+					}
+					select {
+					case awsChan <- &chanStruct{
+						err: errwrap.Wrapf(err, "unknown error waiting for instance to exist"),
+					}:
+					case <-closeChan:
+					}
+					return
+				}
+				stateOutput, err := obj.client.DescribeInstances(diInput)
+				if err != nil {
+					select {
+					case awsChan <- &chanStruct{
+						err: errwrap.Wrapf(err, "error describing instances"),
+					}:
+					case <-closeChan:
+					}
+					return
+				}
+				if len(stateOutput.Reservations) == 1 {
+					{
+						select {
+						case awsChan <- &chanStruct{
+							str: "exists",
+						}:
+						case <-closeChan:
+							return
+						}
+					}
+				}
+			}
+			select {
+			case <-closeChan:
+				return
+			default:
+			}
+		}
+	}()
+	for {
+		select {
+		case event := <-obj.Events():
+			if exit, send = obj.ReadEvent(event); exit != nil {
+				close(closeChan)
+				return *exit
+			}
+		case msg, ok := <-awsChan:
+			if !ok {
+				return *exit
+			}
+			if err := msg.err; err != nil {
+				return err
+			}
+			log.Printf("%s: State: %s", obj, msg.str)
+			obj.StateOK(false)
+			send = true
+		}
+		if send {
+			send = false
+			obj.Event()
+		}
+	}
+}
+
+// CheckApply method for AwsEc2 resource.
+func (obj *AwsEc2Res) CheckApply(apply bool) (checkOK bool, err error) {
+	log.Printf("%s: CheckApply(%t)", obj, apply)
+
+	const waitTimeout = 400
+
+	diInput := ec2.DescribeInstancesInput{
+		Filters: []*ec2.Filter{
+			{
+				Name:   aws.String("tag:Name"),
+				Values: []*string{aws.String(obj.prependName())},
+			},
+			{
+				Name: aws.String("instance-state-name"),
+				Values: []*string{
+					aws.String("running"),
+					aws.String("pending"),
+					aws.String("stopped"),
+					aws.String("stopping"),
+				},
+			},
+		},
+	}
+	diOutput, err := obj.client.DescribeInstances(&diInput)
+	if err != nil {
+		return false, errwrap.Wrapf(err, "error describing instances")
+	}
+
+	if len(diOutput.Reservations) < 1 && obj.State == "terminated" {
+		return true, nil
+	}
+	if len(diOutput.Reservations) == 1 && *diOutput.Reservations[0].Instances[0].State.Name == obj.State {
+		return true, nil
+	}
+	if !apply {
+		return false, nil
+	}
+
+	if len(diOutput.Reservations) > 1 {
+		return false, fmt.Errorf("too many reservations")
+	}
+	ctx, cancel := context.WithTimeout(context.TODO(), waitTimeout*time.Second)
+	defer cancel()
+	if len(diOutput.Reservations) == 1 {
+		instanceID := diOutput.Reservations[0].Instances[0].InstanceId
+		describeInput := &ec2.DescribeInstancesInput{
+			InstanceIds: []*string{instanceID},
+		}
+		if len(diOutput.Reservations[0].Instances) > 1 {
+			return false, fmt.Errorf("more than one instance was returned")
+		}
+		if obj.State == "running" {
+			startInput := &ec2.StartInstancesInput{
+				InstanceIds: []*string{instanceID},
+			}
+			_, err := obj.client.StartInstances(startInput)
+			if err != nil {
+				return false, errwrap.Wrapf(err, "error starting instance")
+			}
+			if err := obj.client.WaitUntilInstanceRunningWithContext(ctx, describeInput); err != nil {
+				if aerr, ok := err.(awserr.Error); ok {
+					if aerr.Code() == request.CanceledErrorCode {
+						return false, errwrap.Wrapf(err, "timeout while waiting for instance to start")
+					}
+				}
+				return false, errwrap.Wrapf(err, "unknown error waiting for instance to start")
+			}
+			log.Printf("%s: instance running", obj)
+		}
+		if obj.State == "stopped" {
+			stopInput := &ec2.StopInstancesInput{
+				InstanceIds: []*string{instanceID},
+			}
+			_, err := obj.client.StopInstances(stopInput)
+			if err != nil {
+				return false, errwrap.Wrapf(err, "error stopping instance")
+			}
+			if err := obj.client.WaitUntilInstanceStoppedWithContext(ctx, describeInput); err != nil {
+				if aerr, ok := err.(awserr.Error); ok {
+					if aerr.Code() == request.CanceledErrorCode {
+						return false, errwrap.Wrapf(err, "timeout while waiting for instance to stop")
+					}
+				}
+				return false, errwrap.Wrapf(err, "unknown error waiting for instance to stop")
+			}
+			log.Printf("%s: instance stopped", obj)
+		}
+		if obj.State == "terminated" {
+			terminateInput := &ec2.TerminateInstancesInput{
+				InstanceIds: []*string{instanceID},
+			}
+			_, err := obj.client.TerminateInstances(terminateInput)
+			if err != nil {
+				return false, errwrap.Wrapf(err, "error terminating instance")
+			}
+			if err := obj.client.WaitUntilInstanceTerminatedWithContext(ctx, describeInput); err != nil {
+				if aerr, ok := err.(awserr.Error); ok {
+					if aerr.Code() == request.CanceledErrorCode {
+						return false, errwrap.Wrapf(err, "timeout while waiting for instance to terminate")
+					}
+				}
+				return false, errwrap.Wrapf(err, "unknown error waiting for instance to terminate")
+			}
+			log.Printf("%s: instance terminated", obj)
+		}
+	}
+	if len(diOutput.Reservations) < 1 && obj.State == "running" {
+		runParams := &ec2.RunInstancesInput{
+			ImageId:      aws.String(obj.ImageID),
+			InstanceType: aws.String(obj.Type),
+		}
+		runParams.SetMinCount(1)
+		runParams.SetMaxCount(1)
+		runResult, err := obj.client.RunInstances(runParams)
+		if err != nil {
+			return false, errwrap.Wrapf(err, "could not create instance")
+		}
+		_, err = obj.client.CreateTags(&ec2.CreateTagsInput{
+			Resources: []*string{runResult.Instances[0].InstanceId},
+			Tags: []*ec2.Tag{
+				&ec2.Tag{
+					Key:   aws.String("Name"),
+					Value: aws.String(obj.prependName()),
+				},
+			},
+		})
+		if err != nil {
+			return false, errwrap.Wrapf(err, "could not create tags for instance")
+		}
+
+		describeInput := &ec2.DescribeInstancesInput{
+			InstanceIds: []*string{runResult.Instances[0].InstanceId},
+		}
+		err = obj.client.WaitUntilInstanceRunningWithContext(ctx, describeInput)
+		if err != nil {
+			if aerr, ok := err.(awserr.Error); ok {
+				if aerr.Code() == request.CanceledErrorCode {
+					return false, errwrap.Wrapf(err, "timeout while waiting for instance to start")
+				}
+			}
+			return false, errwrap.Wrapf(err, "unknown error waiting for instance to start")
+		}
+		log.Printf("%s: instance running", obj)
+	}
+	return false, nil
+}
+
+// AwsEc2UID is the UID struct for AwsEc2Res.
+type AwsEc2UID struct {
+	BaseUID
+	name string
+}
+
+// UIDs includes all params to make a unique identification of this object.
+// Most resources only return one, although some resources can return multiple.
+func (obj *AwsEc2Res) UIDs() []ResUID {
+	x := &AwsEc2UID{
+		BaseUID: BaseUID{Name: obj.GetName(), Kind: obj.GetKind()},
+		name:    obj.Name,
+	}
+	return []ResUID{x}
+}
+
+// GroupCmp returns whether two resources can be grouped together or not.
+func (obj *AwsEc2Res) GroupCmp(r Res) bool {
+	_, ok := r.(*AwsEc2Res)
+	if !ok {
+		return false
+	}
+	return false
+}
+
+// Compare two resources and return if they are equivalent.
+func (obj *AwsEc2Res) Compare(r Res) bool {
+	// we can only compare AwsEc2Res to others of the same resource kind
+	res, ok := r.(*AwsEc2Res)
+	if !ok {
+		return false
+	}
+	if !obj.BaseRes.Compare(res) { // call base Compare
+		return false
+	}
+	if obj.Name != res.Name {
+		return false
+	}
+	if obj.State != res.State {
+		return false
+	}
+	if obj.Region != res.Region {
+		return false
+	}
+	if obj.Type != res.Type {
+		return false
+	}
+	if obj.ImageID != res.ImageID {
+		return false
+	}
+	return true
+}
+
+// UnmarshalYAML is the custom unmarshal handler for this struct.
+// It is primarily useful for setting the defaults.
+func (obj *AwsEc2Res) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	type rawRes AwsEc2Res // indirection to avoid infinite recursion
+
+	def := obj.Default()        // get the default
+	res, ok := def.(*AwsEc2Res) // put in the right format
+	if !ok {
+		return fmt.Errorf("could not convert to AwsEc2Res")
+	}
+	raw := rawRes(*res) // convert; the defaults go here
+
+	if err := unmarshal(&raw); err != nil {
+		return err
+	}
+
+	*obj = AwsEc2Res(raw) // restore from indirection with type conversion!
+	return nil
+}
+
+func (obj *AwsEc2Res) prependName() string {
+	return AwsPrefix + obj.GetName()
+}

resources/edge.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/exec.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
@@ -20,7 +20,6 @@ package resources
 import (
 	"bufio"
 	"bytes"
-	"encoding/gob"
 	"fmt"
 	"log"
 	"os/exec"
@@ -34,7 +33,6 @@ import (
 )
 
 func init() {
-	gob.Register(&ExecRes{})
 	RegisterResource("exec", func() Res { return &ExecRes{} })
 }
 
@@ -73,7 +71,6 @@ func (obj *ExecRes) Validate() error {
 
 // Init runs some startup code for this resource.
 func (obj *ExecRes) Init() error {
-	obj.BaseRes.Kind = "exec"
 	return obj.BaseRes.Init() // call base init, b/c we're overriding
 }
 

resources/exec_test.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
@@ -24,14 +24,18 @@ import (
 func TestExecSendRecv1(t *testing.T) {
 	r1 := &ExecRes{
 		BaseRes: BaseRes{
-			Name: "exec1",
-			//MetaParams: MetaParams,
+			Name:       "exec1",
+			Kind:       "exec",
+			MetaParams: DefaultMetaParams,
 		},
 		Cmd:   "echo hello world",
 		Shell: "/bin/bash",
 	}
 
 	r1.Setup(nil, r1, r1)
+	if err := r1.Validate(); err != nil {
+		t.Errorf("validate failed with: %v", err)
+	}
 	defer func() {
 		if err := r1.Close(); err != nil {
 			t.Errorf("close failed with: %v", err)
@@ -70,14 +74,18 @@ func TestExecSendRecv1(t *testing.T) {
 func TestExecSendRecv2(t *testing.T) {
 	r1 := &ExecRes{
 		BaseRes: BaseRes{
-			Name: "exec1",
-			//MetaParams: MetaParams,
+			Name:       "exec1",
+			Kind:       "exec",
+			MetaParams: DefaultMetaParams,
 		},
 		Cmd:   "echo hello world 1>&2", // to stderr
 		Shell: "/bin/bash",
 	}
 
 	r1.Setup(nil, r1, r1)
+	if err := r1.Validate(); err != nil {
+		t.Errorf("validate failed with: %v", err)
+	}
 	defer func() {
 		if err := r1.Close(); err != nil {
 			t.Errorf("close failed with: %v", err)
@@ -116,14 +124,18 @@ func TestExecSendRecv2(t *testing.T) {
 func TestExecSendRecv3(t *testing.T) {
 	r1 := &ExecRes{
 		BaseRes: BaseRes{
-			Name: "exec1",
-			//MetaParams: MetaParams,
+			Name:       "exec1",
+			Kind:       "exec",
+			MetaParams: DefaultMetaParams,
 		},
 		Cmd:   "echo hello world && echo goodbye world 1>&2", // to stdout && stderr
 		Shell: "/bin/bash",
 	}
 
 	r1.Setup(nil, r1, r1)
+	if err := r1.Validate(); err != nil {
+		t.Errorf("validate failed with: %v", err)
+	}
 	defer func() {
 		if err := r1.Close(); err != nil {
 			t.Errorf("close failed with: %v", err)

resources/file.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
@@ -20,7 +20,6 @@ package resources
 import (
 	"bytes"
 	"crypto/sha256"
-	"encoding/gob"
 	"encoding/hex"
 	"fmt"
 	"io"
@@ -41,7 +40,6 @@ import (
 )
 
 func init() {
-	gob.Register(&FileRes{})
 	RegisterResource("file", func() Res { return &FileRes{} })
 }
 
@@ -148,7 +146,6 @@ func (obj *FileRes) Init() error {
 	obj.path = obj.GetPath()                     // compute once
 	obj.isDir = strings.HasSuffix(obj.path, "/") // dirs have trailing slashes
 
-	obj.BaseRes.Kind = "file"
 	return obj.BaseRes.Init() // call base init, b/c we're overriding
 }
 

resources/file_attrs.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // +build go1.7

resources/file_attrs_go1.6.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // +build !go1.7

resources/file_test.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/graph.go

@@ -3,22 +3,21 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
-	"encoding/gob"
 	"fmt"
 
 	"github.com/purpleidea/mgmt/pgraph"
@@ -29,7 +28,6 @@ import (
 
 func init() {
 	RegisterResource("graph", func() Res { return &GraphRes{} })
-	gob.Register(&GraphRes{})
 }
 
 // GraphRes is a resource that recursively runs a sub graph of resources.
@@ -89,7 +87,6 @@ func (obj *GraphRes) Init() error {
 		}
 	}
 
-	obj.BaseRes.Kind = "graph"
 	return obj.BaseRes.Init() // call base init, b/c we're overrriding
 }
 

resources/group.go

@@ -0,0 +1,314 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package resources
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os/exec"
+	"os/user"
+	"strconv"
+	"syscall"
+
+	"github.com/purpleidea/mgmt/recwatch"
+
+	errwrap "github.com/pkg/errors"
+)
+
+func init() {
+	RegisterResource("group", func() Res { return &GroupRes{} })
+}
+
+const groupFile = "/etc/group"
+
+// GroupRes is a user group resource.
+type GroupRes struct {
+	BaseRes `yaml:",inline"`
+	State   string  `yaml:"state"` // state: exists, absent
+	GID     *uint32 `yaml:"gid"`   // the group's gid
+
+	recWatcher *recwatch.RecWatcher
+}
+
+// Default returns some sensible defaults for this resource.
+func (obj *GroupRes) Default() Res {
+	return &GroupRes{
+		BaseRes: BaseRes{
+			MetaParams: DefaultMetaParams, // force a default
+		},
+	}
+}
+
+// Validate if the params passed in are valid data.
+func (obj *GroupRes) Validate() error {
+	if obj.State != "exists" && obj.State != "absent" {
+		return fmt.Errorf("State must be 'exists' or 'absent'")
+	}
+	return obj.BaseRes.Validate()
+}
+
+// Init initializes the resource.
+func (obj *GroupRes) Init() error {
+	return obj.BaseRes.Init() // call base init, b/c we're overriding
+}
+
+// Watch is the primary listener for this resource and it outputs events.
+func (obj *GroupRes) Watch() error {
+	var err error
+	obj.recWatcher, err = recwatch.NewRecWatcher(groupFile, false)
+	if err != nil {
+		return err
+	}
+	defer obj.recWatcher.Close()
+
+	// notify engine that we're running
+	if err := obj.Running(); err != nil {
+		return err // bubble up a NACK...
+	}
+
+	var send = false // send event?
+	var exit *error
+
+	for {
+		if obj.debug {
+			log.Printf("%s: Watching: %s", obj, groupFile) // attempting to watch...
+		}
+
+		select {
+		case event, ok := <-obj.recWatcher.Events():
+			if !ok { // channel shutdown
+				return nil
+			}
+			if err := event.Error; err != nil {
+				return errwrap.Wrapf(err, "Unknown %s watcher error", obj)
+			}
+			if obj.debug { // don't access event.Body if event.Error isn't nil
+				log.Printf("%s: Event(%s): %v", obj, event.Body.Name, event.Body.Op)
+			}
+			send = true
+			obj.StateOK(false) // dirty
+
+		case event := <-obj.Events():
+			if exit, send = obj.ReadEvent(event); exit != nil {
+				return *exit // exit
+			}
+			//obj.StateOK(false) // dirty // these events don't invalidate state
+		}
+
+		// do all our event sending all together to avoid duplicate msgs
+		if send {
+			send = false
+			obj.Event()
+		}
+	}
+}
+
+// CheckApply method for Group resource.
+func (obj *GroupRes) CheckApply(apply bool) (checkOK bool, err error) {
+	log.Printf("%s: CheckApply(%t)", obj, apply)
+
+	// check if the group exists
+	exists := true
+	group, err := user.LookupGroup(obj.GetName())
+	if err != nil {
+		if _, ok := err.(user.UnknownGroupError); !ok {
+			return false, errwrap.Wrapf(err, "error looking up group")
+		}
+		exists = false
+	}
+	// if the group doesn't exist and should be absent, we are done
+	if obj.State == "absent" && !exists {
+		return true, nil
+	}
+	// if the group exists and no GID is specified, we are done
+	if obj.State == "exists" && exists && obj.GID == nil {
+		return true, nil
+	}
+	if exists && obj.GID != nil {
+		// check if GID is taken
+		lookupGID, err := user.LookupGroupId(strconv.Itoa(int(*obj.GID)))
+		if err != nil {
+			if _, ok := err.(user.UnknownGroupIdError); !ok {
+				return false, errwrap.Wrapf(err, "error looking up GID")
+			}
+		}
+		if lookupGID != nil && lookupGID.Name != obj.GetName() {
+			return false, fmt.Errorf("the requested GID belongs to another group")
+		}
+		// get the existing group's GID
+		existingGID, err := strconv.ParseUint(group.Gid, 10, 32)
+		if err != nil {
+			return false, errwrap.Wrapf(err, "error casting existing GID")
+		}
+		// check if existing group has the wrong GID
+		// if it is wrong groupmod will change it to the desired value
+		if *obj.GID != uint32(existingGID) {
+			log.Printf("%s: Inconsistent GID: %s", obj, obj.GetName())
+		}
+		// if the group exists and has the correct GID, we are done
+		if obj.State == "exists" && *obj.GID == uint32(existingGID) {
+			return true, nil
+		}
+	}
+
+	if !apply {
+		return false, nil
+	}
+
+	var cmdName string
+	args := []string{obj.GetName()}
+
+	if obj.State == "exists" {
+		if exists {
+			log.Printf("%s: Modifying group: %s", obj, obj.GetName())
+			cmdName = "groupmod"
+		} else {
+			log.Printf("%s: Adding group: %s", obj, obj.GetName())
+			cmdName = "groupadd"
+		}
+		if obj.GID != nil {
+			args = append(args, "-g", fmt.Sprintf("%d", *obj.GID))
+		}
+	}
+	if obj.State == "absent" && exists {
+		log.Printf("%s: Deleting group: %s", obj, obj.GetName())
+		cmdName = "groupdel"
+	}
+
+	cmd := exec.Command(cmdName, args...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		Setpgid: true,
+		Pgid:    0,
+	}
+
+	// open a pipe to get error messages from os/exec
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		return false, errwrap.Wrapf(err, "failed to initialize stderr pipe")
+	}
+
+	// start the command
+	if err := cmd.Start(); err != nil {
+		return false, errwrap.Wrapf(err, "cmd failed to start")
+	}
+	// capture any error messages
+	slurp, err := ioutil.ReadAll(stderr)
+	if err != nil {
+		return false, errwrap.Wrapf(err, "error slurping error message")
+	}
+	// wait until cmd exits and return error message if any
+	if err := cmd.Wait(); err != nil {
+		return false, errwrap.Wrapf(err, "%s", slurp)
+	}
+
+	return false, nil
+}
+
+// GroupUID is the UID struct for GroupRes.
+type GroupUID struct {
+	BaseUID
+	name string
+	gid  *uint32
+}
+
+// IFF aka if and only if they are equivalent, return true. If not, false.
+func (obj *GroupUID) IFF(uid ResUID) bool {
+	res, ok := uid.(*GroupUID)
+	if !ok {
+		return false
+	}
+	if obj.gid != nil && res.gid != nil {
+		if *obj.gid != *res.gid {
+			return false
+		}
+	}
+	if obj.name != "" && res.name != "" {
+		if obj.name != res.name {
+			return false
+		}
+	}
+	return true
+}
+
+// UIDs includes all params to make a unique identification of this object.
+// Most resources only return one, although some resources can return multiple.
+func (obj *GroupRes) UIDs() []ResUID {
+	x := &GroupUID{
+		BaseUID: BaseUID{Name: obj.GetName(), Kind: obj.GetKind()},
+		name:    obj.Name,
+		gid:     obj.GID,
+	}
+	return []ResUID{x}
+}
+
+// GroupCmp returns whether two resources can be grouped together or not.
+func (obj *GroupRes) GroupCmp(r Res) bool {
+	_, ok := r.(*GroupRes)
+	if !ok {
+		return false
+	}
+	return false
+}
+
+// Compare two resources and return if they are equivalent.
+func (obj *GroupRes) Compare(r Res) bool {
+	// we can only compare GroupRes to others of the same resource kind
+	res, ok := r.(*GroupRes)
+	if !ok {
+		return false
+	}
+	if !obj.BaseRes.Compare(res) { // call base Compare
+		return false
+	}
+	if obj.Name != res.Name {
+		return false
+	}
+	if obj.State != res.State {
+		return false
+	}
+	if (obj.GID == nil) != (res.GID == nil) {
+		return false
+	}
+	if obj.GID != nil && res.GID != nil {
+		if *obj.GID != *res.GID {
+			return false
+		}
+	}
+	return true
+}
+
+// UnmarshalYAML is the custom unmarshal handler for this struct.
+// It is primarily useful for setting the defaults.
+func (obj *GroupRes) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	type rawRes GroupRes // indirection to avoid infinite recursion
+
+	def := obj.Default()       // get the default
+	res, ok := def.(*GroupRes) // put in the right format
+	if !ok {
+		return fmt.Errorf("could not convert to GroupRes")
+	}
+	raw := rawRes(*res) // convert; the defaults go here
+
+	if err := unmarshal(&raw); err != nil {
+		return err
+	}
+
+	*obj = GroupRes(raw) // restore from indirection with type conversion!
+	return nil
+}

resources/hostname.go

@@ -3,22 +3,21 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
-	"encoding/gob"
 	"errors"
 	"fmt"
 	"log"
@@ -36,7 +35,6 @@ var ErrResourceInsufficientParameters = errors.New(
 
 func init() {
 	RegisterResource("hostname", func() Res { return &HostnameRes{} })
-	gob.Register(&HostnameRes{})
 }
 
 const (
@@ -88,7 +86,6 @@ func (obj *HostnameRes) Validate() error {
 
 // Init runs some startup code for this resource.
 func (obj *HostnameRes) Init() error {
-	obj.BaseRes.Kind = "hostname"
 	if obj.PrettyHostname == "" {
 		obj.PrettyHostname = obj.Hostname
 	}

resources/kv.go

@@ -3,22 +3,21 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
-	"encoding/gob"
 	"fmt"
 	"log"
 	"strconv"
@@ -28,7 +27,6 @@ import (
 
 func init() {
 	RegisterResource("kv", func() Res { return &KVRes{} })
-	gob.Register(&KVRes{})
 }
 
 // KVResSkipCmpStyle represents the different styles of comparison when using SkipLessThan.
@@ -89,7 +87,6 @@ func (obj *KVRes) Validate() error {
 
 // Init initializes the resource.
 func (obj *KVRes) Init() error {
-	obj.BaseRes.Kind = "kv"
 	return obj.BaseRes.Init() // call base init, b/c we're overriding
 }
 

resources/metaparams.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/mgraph.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources // TODO: can this be a separate package or will it break the dag?

resources/msg.go

@@ -3,22 +3,21 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
-	"encoding/gob"
 	"fmt"
 	"log"
 	"regexp"
@@ -29,7 +28,6 @@ import (
 
 func init() {
 	RegisterResource("msg", func() Res { return &MsgRes{} })
-	gob.Register(&MsgRes{})
 }
 
 // MsgRes is a resource that writes messages to logs.
@@ -71,12 +69,23 @@ func (obj *MsgRes) Validate() error {
 			return fmt.Errorf("fields cannot begin with _")
 		}
 	}
+	switch obj.Priority {
+	case "Emerg":
+	case "Alert":
+	case "Crit":
+	case "Err":
+	case "Warning":
+	case "Notice":
+	case "Info":
+	case "Debug":
+	default:
+		return fmt.Errorf("invalid Priority '%s'", obj.Priority)
+	}
 	return obj.BaseRes.Validate()
 }
 
 // Init runs some startup code for this resource.
 func (obj *MsgRes) Init() error {
-	obj.BaseRes.Kind = "msg"
 	return obj.BaseRes.Init() // call base init, b/c we're overrriding
 }
 
@@ -97,7 +106,6 @@ func (obj *MsgRes) updateStateOK() {
 }
 
 // JournalPriority converts a string description to a numeric priority.
-// XXX: Have Validate() make sure it actually is one of these.
 func (obj *MsgRes) journalPriority() journal.Priority {
 	switch obj.Priority {
 	case "Emerg":

resources/msg_test.go

@@ -0,0 +1,54 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package resources
+
+import (
+	"testing"
+)
+
+func TestMsgValidate1(t *testing.T) {
+	r1 := &MsgRes{
+		BaseRes: BaseRes{
+			Name:       "msg1",
+			Kind:       "msg",
+			MetaParams: DefaultMetaParams,
+		},
+		Priority: "Debug",
+	}
+
+	r1.Setup(nil, r1, r1)
+	if err := r1.Validate(); err != nil {
+		t.Errorf("validate failed with: %v", err)
+	}
+}
+
+func TestMsgValidate2(t *testing.T) {
+	r1 := &MsgRes{
+		BaseRes: BaseRes{
+			Name:       "msg1",
+			Kind:       "msg",
+			MetaParams: DefaultMetaParams,
+		},
+		Priority: "UnrealPriority",
+	}
+
+	r1.Setup(nil, r1, r1)
+	if err := r1.Validate(); err == nil {
+		t.Errorf("validation error is nil")
+	}
+}

resources/noop.go

@@ -3,29 +3,27 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
-	"encoding/gob"
 	"fmt"
 	"log"
 )
 
 func init() {
 	RegisterResource("noop", func() Res { return &NoopRes{} })
-	gob.Register(&NoopRes{})
 }
 
 // NoopRes is a no-op resource that does nothing.
@@ -50,7 +48,6 @@ func (obj *NoopRes) Validate() error {
 
 // Init runs some startup code for this resource.
 func (obj *NoopRes) Init() error {
-	obj.BaseRes.Kind = "noop"
 	return obj.BaseRes.Init() // call base init, b/c we're overriding
 }
 

resources/nspawn.go

@@ -3,32 +3,34 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
-	"encoding/gob"
 	"errors"
 	"fmt"
 	"log"
+	"strconv"
+	"unicode"
 
 	"github.com/purpleidea/mgmt/util"
 
+	systemdDbus "github.com/coreos/go-systemd/dbus"
+	machined "github.com/coreos/go-systemd/machine1"
 	systemdUtil "github.com/coreos/go-systemd/util"
 	"github.com/godbus/dbus"
 	errwrap "github.com/pkg/errors"
-	machined "github.com/purpleidea/go-systemd/machine1"
 )
 
 const (
@@ -42,15 +44,14 @@ const (
 
 func init() {
 	RegisterResource("nspawn", func() Res { return &NspawnRes{} })
-	gob.Register(&NspawnRes{})
 }
 
 // NspawnRes is an nspawn container resource.
 type NspawnRes struct {
 	BaseRes `yaml:",inline"`
 	State   string `yaml:"state"`
-	// We're using the svc resource to start the machine because that's
-	// what machinectl does. We're not using svc.Watch because then we
+	// We're using the svc resource to start and stop the machine because
+	// that's what machinectl does. We're not using svc.Watch because then we
 	// would have two watches potentially racing each other and producing
 	// potentially unexpected results. We get everything we need to monitor
 	// the machine state changes from the org.freedesktop.machine1 object.
@@ -67,33 +68,90 @@ func (obj *NspawnRes) Default() Res {
 	}
 }
 
+// makeComposite creates a pointer to a SvcRes. The pointer is used to
+// validate and initialize the nested svc.
+func (obj *NspawnRes) makeComposite() (*SvcRes, error) {
+	res, err := NewNamedResource("svc", fmt.Sprintf(nspawnServiceTmpl, obj.GetName()))
+	if err != nil {
+		return nil, err
+	}
+	svc := res.(*SvcRes)
+	svc.State = obj.State
+	return svc, nil
+}
+
+// systemdVersion uses dbus to check which version of systemd is installed.
+func systemdVersion() (uint16, error) {
+	// check if systemd is running
+	if !systemdUtil.IsRunningSystemd() {
+		return 0, fmt.Errorf("systemd is not running")
+	}
+	bus, err := systemdDbus.NewSystemdConnection()
+	if err != nil {
+		return 0, errwrap.Wrapf(err, "failed to connect to bus")
+	}
+	defer bus.Close()
+	// get the systemd version
+	verString, err := bus.GetManagerProperty("Version")
+	if err != nil {
+		return 0, errwrap.Wrapf(err, "could not get version property")
+	}
+	// lose the surrounding quotes
+	verNum, err := strconv.Unquote(verString)
+	if err != nil {
+		return 0, errwrap.Wrapf(err, "error unquoting version number")
+	}
+	// cast to uint16
+	ver, err := strconv.ParseUint(verNum, 10, 16)
+	if err != nil {
+		return 0, errwrap.Wrapf(err, "error casting systemd version number")
+	}
+	return uint16(ver), nil
+}
+
 // Validate if the params passed in are valid data.
 func (obj *NspawnRes) Validate() error {
-	// TODO: validStates should be an enum!
-	validStates := map[string]struct{}{
-		stopped: {},
-		running: {},
+	if len(obj.GetName()) > 64 {
+		return fmt.Errorf("name must be 64 characters or less")
 	}
-	if _, exists := validStates[obj.State]; !exists {
+	// check if systemd version is higher than 231 to allow non-alphanumeric
+	// machine names, as previous versions would error in such cases
+	ver, err := systemdVersion()
+	if err != nil {
+		return err
+	}
+	if ver < 231 {
+		for _, char := range obj.GetName() {
+			if !unicode.IsLetter(char) && !unicode.IsNumber(char) {
+				return fmt.Errorf("name must only contain alphanumeric characters for systemd versions < 231")
+			}
+		}
+	}
+
+	if obj.State != running && obj.State != stopped {
 		return fmt.Errorf("invalid state: %s", obj.State)
 	}
 
-	if err := obj.svc.Validate(); err != nil { // composite resource
-		return errwrap.Wrapf(err, "validate failed for embedded svc")
+	svc, err := obj.makeComposite()
+	if err != nil {
+		return errwrap.Wrapf(err, "makeComposite failed in validate")
+	}
+	if err := svc.Validate(); err != nil { // composite resource
+		return errwrap.Wrapf(err, "validate failed for embedded svc: %s", obj.svc)
 	}
 	return obj.BaseRes.Validate()
 }
 
 // Init runs some startup code for this resource.
 func (obj *NspawnRes) Init() error {
-	var serviceName = fmt.Sprintf(nspawnServiceTmpl, obj.GetName())
-	obj.svc = &SvcRes{}
-	obj.svc.Name = serviceName
-	obj.svc.State = obj.State
+	svc, err := obj.makeComposite()
+	if err != nil {
+		return errwrap.Wrapf(err, "makeComposite failed in init")
+	}
+	obj.svc = svc
 	if err := obj.svc.Init(); err != nil {
 		return err
 	}
-	obj.BaseRes.Kind = "nspawn"
 	return obj.BaseRes.Init()
 }
 
@@ -118,8 +176,10 @@ func (obj *NspawnRes) Watch() error {
 	if err := call.Err; err != nil {
 		return err
 	}
-	buschan := make(chan *dbus.Signal, 10)
-	bus.Signal(buschan)
+	// TODO: verify that implementation doesn't deadlock if there are unread
+	// messages left in the channel
+	busChan := make(chan *dbus.Signal, 10)
+	bus.Signal(busChan)
 
 	// notify engine that we're running
 	if err := obj.Running(); err != nil {
@@ -129,9 +189,12 @@ func (obj *NspawnRes) Watch() error {
 	var send = false
 	var exit *error
 
+	defer close(busChan)
+	defer bus.Close()
+	defer bus.RemoveSignal(busChan)
 	for {
 		select {
-		case event := <-buschan:
+		case event := <-busChan:
 			// process org.freedesktop.machine1 events for this resource's name
 			if event.Body[0] == obj.GetName() {
 				log.Printf("%s: Event received: %v", obj, event.Name)
@@ -178,7 +241,7 @@ func (obj *NspawnRes) CheckApply(apply bool) (checkOK bool, err error) {
 	// compare the current state with the desired state and perform the
 	// appropriate action
 	var exists = true
-	properties, err := conn.GetProperties(obj.GetName())
+	properties, err := conn.DescribeMachine(obj.GetName())
 	if err != nil {
 		if err, ok := err.(dbus.Error); ok && err.Name !=
 			"org.freedesktop.machine1.NoSuchMachine" {
@@ -211,25 +274,10 @@ func (obj *NspawnRes) CheckApply(apply bool) (checkOK bool, err error) {
 		return false, nil
 	}
 
-	if obj.debug {
-		log.Printf("%s: CheckApply() applying '%s' state", obj, obj.State)
-	}
-
-	if obj.State == running {
-		// start the machine using svc resource
-		log.Printf("%s: Starting machine", obj)
-		// assume state had to be changed at this point, ignore checkOK
-		if _, err := obj.svc.CheckApply(apply); err != nil {
-			return false, errwrap.Wrapf(err, "nested svc failed")
-		}
-	}
-	if obj.State == stopped {
-		// terminate the machine with
-		// org.freedesktop.machine1.Manager.KillMachine
-		log.Printf("%s: Stopping machine", obj)
-		if err := conn.TerminateMachine(obj.GetName()); err != nil {
-			return false, errwrap.Wrapf(err, "failed to stop machine")
-		}
+	log.Printf("%s: CheckApply() applying '%s' state", obj, obj.State)
+	// use the embedded svc to apply the correct state
+	if _, err := obj.svc.CheckApply(apply); err != nil {
+		return false, errwrap.Wrapf(err, "nested svc failed")
 	}
 
 	return false, nil
@@ -287,6 +335,9 @@ func (obj *NspawnRes) Compare(r Res) bool {
 	if obj.Name != res.Name {
 		return false
 	}
+	if obj.State != res.State {
+		return false
+	}
 
 	if !obj.svc.Compare(res.svc) {
 		return false

resources/packagekit/packagekit.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package packagekit provides an interface to interact with packagekit.
@@ -33,8 +33,8 @@ import (
 
 // global tweaks of verbosity and code path
 const (
-	PK_DEBUG = false
-	PARANOID = false // enable if you see any ghosts
+	Debug    = false
+	Paranoid = false // enable if you see any ghosts
 )
 
 // constants which might need to be tweaked or which contain special dbus strings.
@@ -74,76 +74,76 @@ var (
 //type enum_filter uint64
 // https://github.com/hughsie/PackageKit/blob/master/lib/packagekit-glib2/pk-enum.c
 const ( //static const PkEnumMatch enum_filter[]
-	PK_FILTER_ENUM_UNKNOWN         uint64 = 1 << iota // "unknown"
-	PK_FILTER_ENUM_NONE                               // "none"
-	PK_FILTER_ENUM_INSTALLED                          // "installed"
-	PK_FILTER_ENUM_NOT_INSTALLED                      // "~installed"
-	PK_FILTER_ENUM_DEVELOPMENT                        // "devel"
-	PK_FILTER_ENUM_NOT_DEVELOPMENT                    // "~devel"
-	PK_FILTER_ENUM_GUI                                // "gui"
-	PK_FILTER_ENUM_NOT_GUI                            // "~gui"
-	PK_FILTER_ENUM_FREE                               // "free"
-	PK_FILTER_ENUM_NOT_FREE                           // "~free"
-	PK_FILTER_ENUM_VISIBLE                            // "visible"
-	PK_FILTER_ENUM_NOT_VISIBLE                        // "~visible"
-	PK_FILTER_ENUM_SUPPORTED                          // "supported"
-	PK_FILTER_ENUM_NOT_SUPPORTED                      // "~supported"
-	PK_FILTER_ENUM_BASENAME                           // "basename"
-	PK_FILTER_ENUM_NOT_BASENAME                       // "~basename"
-	PK_FILTER_ENUM_NEWEST                             // "newest"
-	PK_FILTER_ENUM_NOT_NEWEST                         // "~newest"
-	PK_FILTER_ENUM_ARCH                               // "arch"
-	PK_FILTER_ENUM_NOT_ARCH                           // "~arch"
-	PK_FILTER_ENUM_SOURCE                             // "source"
-	PK_FILTER_ENUM_NOT_SOURCE                         // "~source"
-	PK_FILTER_ENUM_COLLECTIONS                        // "collections"
-	PK_FILTER_ENUM_NOT_COLLECTIONS                    // "~collections"
-	PK_FILTER_ENUM_APPLICATION                        // "application"
-	PK_FILTER_ENUM_NOT_APPLICATION                    // "~application"
-	PK_FILTER_ENUM_DOWNLOADED                         // "downloaded"
-	PK_FILTER_ENUM_NOT_DOWNLOADED                     // "~downloaded"
+	PkFilterEnumUnknown        uint64 = 1 << iota // "unknown"
+	PkFilterEnumNone                              // "none"
+	PkFilterEnumInstalled                         // "installed"
+	PkFilterEnumNotInstalled                      // "~installed"
+	PkFilterEnumDevelopment                       // "devel"
+	PkFilterEnumNotDevelopment                    // "~devel"
+	PkFilterEnumGui                               // "gui"
+	PkFilterEnumNotGui                            // "~gui"
+	PkFilterEnumFree                              // "free"
+	PkFilterEnumNotFree                           // "~free"
+	PkFilterEnumVisible                           // "visible"
+	PkFilterEnumNotVisible                        // "~visible"
+	PkFilterEnumSupported                         // "supported"
+	PkFilterEnumNotSupported                      // "~supported"
+	PkFilterEnumBasename                          // "basename"
+	PkFilterEnumNotBasename                       // "~basename"
+	PkFilterEnumNewest                            // "newest"
+	PkFilterEnumNotNewest                         // "~newest"
+	PkFilterEnumArch                              // "arch"
+	PkFilterEnumNotArch                           // "~arch"
+	PkFilterEnumSource                            // "source"
+	PkFilterEnumNotSource                         // "~source"
+	PkFilterEnumCollections                       // "collections"
+	PkFilterEnumNotCollections                    // "~collections"
+	PkFilterEnumApplication                       // "application"
+	PkFilterEnumNotApplication                    // "~application"
+	PkFilterEnumDownloaded                        // "downloaded"
+	PkFilterEnumNotDownloaded                     // "~downloaded"
 )
 
 // constants from packagekit c library.
 const ( //static const PkEnumMatch enum_transaction_flag[]
-	PK_TRANSACTION_FLAG_ENUM_NONE            uint64 = 1 << iota // "none"
-	PK_TRANSACTION_FLAG_ENUM_ONLY_TRUSTED                       // "only-trusted"
-	PK_TRANSACTION_FLAG_ENUM_SIMULATE                           // "simulate"
-	PK_TRANSACTION_FLAG_ENUM_ONLY_DOWNLOAD                      // "only-download"
-	PK_TRANSACTION_FLAG_ENUM_ALLOW_REINSTALL                    // "allow-reinstall"
-	PK_TRANSACTION_FLAG_ENUM_JUST_REINSTALL                     // "just-reinstall"
-	PK_TRANSACTION_FLAG_ENUM_ALLOW_DOWNGRADE                    // "allow-downgrade"
+	PkTransactionFlagEnumNone           uint64 = 1 << iota // "none"
+	PkTransactionFlagEnumOnlyTrusted                       // "only-trusted"
+	PkTransactionFlagEnumSimulate                          // "simulate"
+	PkTransactionFlagEnumOnlyDownload                      // "only-download"
+	PkTransactionFlagEnumAllowReinstall                    // "allow-reinstall"
+	PkTransactionFlagEnumJustReinstall                     // "just-reinstall"
+	PkTransactionFlagEnumAllowDowngrade                    // "allow-downgrade"
 )
 
 // constants from packagekit c library.
 const ( //typedef enum
-	PK_INFO_ENUM_UNKNOWN uint64 = 1 << iota
-	PK_INFO_ENUM_INSTALLED
-	PK_INFO_ENUM_AVAILABLE
-	PK_INFO_ENUM_LOW
-	PK_INFO_ENUM_ENHANCEMENT
-	PK_INFO_ENUM_NORMAL
-	PK_INFO_ENUM_BUGFIX
-	PK_INFO_ENUM_IMPORTANT
-	PK_INFO_ENUM_SECURITY
-	PK_INFO_ENUM_BLOCKED
-	PK_INFO_ENUM_DOWNLOADING
-	PK_INFO_ENUM_UPDATING
-	PK_INFO_ENUM_INSTALLING
-	PK_INFO_ENUM_REMOVING
-	PK_INFO_ENUM_CLEANUP
-	PK_INFO_ENUM_OBSOLETING
-	PK_INFO_ENUM_COLLECTION_INSTALLED
-	PK_INFO_ENUM_COLLECTION_AVAILABLE
-	PK_INFO_ENUM_FINISHED
-	PK_INFO_ENUM_REINSTALLING
-	PK_INFO_ENUM_DOWNGRADING
-	PK_INFO_ENUM_PREPARING
-	PK_INFO_ENUM_DECOMPRESSING
-	PK_INFO_ENUM_UNTRUSTED
-	PK_INFO_ENUM_TRUSTED
-	PK_INFO_ENUM_UNAVAILABLE
-	PK_INFO_ENUM_LAST
+	PkInfoEnumUnknown uint64 = 1 << iota
+	PkInfoEnumInstalled
+	PkInfoEnumAvailable
+	PkInfoEnumLow
+	PkInfoEnumEnhancement
+	PkInfoEnumNormal
+	PkInfoEnumBugfix
+	PkInfoEnumImportant
+	PkInfoEnumSecurity
+	PkInfoEnumBlocked
+	PkInfoEnumDownloading
+	PkInfoEnumUpdating
+	PkInfoEnumInstalling
+	PkInfoEnumRemoving
+	PkInfoEnumCleanup
+	PkInfoEnumObsoleting
+	PkInfoEnumCollectionInstalled
+	PkInfoEnumCollectionAvailable
+	PkInfoEnumFinished
+	PkInfoEnumReinstalling
+	PkInfoEnumDowngrading
+	PkInfoEnumPreparing
+	PkInfoEnumDecompressing
+	PkInfoEnumUntrusted
+	PkInfoEnumTrusted
+	PkInfoEnumUnavailable
+	PkInfoEnumLast
 )
 
 // Conn is a wrapper struct so we can pass bus connection around in the struct.
@@ -184,7 +184,7 @@ func (bus *Conn) Close() error {
 
 // internal helper to add signal matches to the bus, should only be called once
 func (bus *Conn) matchSignal(ch chan *dbus.Signal, path dbus.ObjectPath, iface string, signals []string) error {
-	if PK_DEBUG {
+	if Debug {
 		log.Printf("PackageKit: matchSignal(%v, %v, %v, %v)", ch, path, iface, signals)
 	}
 	// eg: gdbus monitor --system --dest org.freedesktop.PackageKit --object-path /org/freedesktop/PackageKit | grep <signal>
@@ -224,7 +224,7 @@ func (bus *Conn) WatchChanges() (chan *dbus.Signal, error) {
 	if err != nil {
 		return nil, err
 	}
-	if PARANOID { // TODO: this filtering might not be necessary anymore...
+	if Paranoid { // TODO: this filtering might not be necessary anymore...
 		// try to handle the filtering inside this function!
 		rch := make(chan *dbus.Signal)
 		go func() {
@@ -257,7 +257,7 @@ func (bus *Conn) WatchChanges() (chan *dbus.Signal, error) {
 
 // CreateTransaction creates and returns a transaction path.
 func (bus *Conn) CreateTransaction() (dbus.ObjectPath, error) {
-	if PK_DEBUG {
+	if Debug {
 		log.Println("PackageKit: CreateTransaction()")
 	}
 	var interfacePath dbus.ObjectPath
@@ -266,7 +266,7 @@ func (bus *Conn) CreateTransaction() (dbus.ObjectPath, error) {
 	if call != nil {
 		return "", call
 	}
-	if PK_DEBUG {
+	if Debug {
 		log.Printf("PackageKit: CreateTransaction(): %v", interfacePath)
 	}
 	return interfacePath, nil
@@ -284,12 +284,12 @@ func (bus *Conn) ResolvePackages(packages []string, filter uint64) ([]string, er
 	// add signal matches for Package and Finished which will always be last
 	var signals = []string{"Package", "Finished", "Error", "Destroy"}
 	bus.matchSignal(ch, interfacePath, PkIfaceTransaction, signals)
-	if PK_DEBUG {
+	if Debug {
 		log.Printf("PackageKit: ResolvePackages(): Object(%v, %v)", PkIface, interfacePath)
 	}
 	obj := bus.GetBus().Object(PkIface, interfacePath) // pass in found transaction path
 	call := obj.Call(FmtTransactionMethod("Resolve"), 0, filter, packages)
-	if PK_DEBUG {
+	if Debug {
 		log.Println("PackageKit: ResolvePackages(): Call: Success!")
 	}
 	if call.Err != nil {
@@ -300,7 +300,7 @@ loop:
 		// FIXME: add a timeout option to error in case signals are dropped!
 		select {
 		case signal := <-ch:
-			if PK_DEBUG {
+			if Debug {
 				log.Printf("PackageKit: ResolvePackages(): Signal: %+v", signal)
 			}
 			if signal.Path != interfacePath {
@@ -338,8 +338,8 @@ loop:
 
 // IsInstalledList queries a list of packages to see if they are installed.
 func (bus *Conn) IsInstalledList(packages []string) ([]bool, error) {
-	var filter uint64             // initializes at the "zero" value of 0
-	filter += PK_FILTER_ENUM_ARCH // always search in our arch
+	var filter uint64          // initializes at the "zero" value of 0
+	filter += PkFilterEnumArch // always search in our arch
 	packageIDs, e := bus.ResolvePackages(packages, filter)
 	if e != nil {
 		return nil, fmt.Errorf("ResolvePackages error: %v", e)
@@ -396,7 +396,11 @@ func (bus *Conn) InstallPackages(packageIDs []string, transactionFlags uint64) e
 	bus.matchSignal(ch, interfacePath, PkIfaceTransaction, signals)
 
 	obj := bus.GetBus().Object(PkIface, interfacePath) // pass in found transaction path
-	call := obj.Call(FmtTransactionMethod("InstallPackages"), 0, transactionFlags, packageIDs)
+	call := obj.Call(FmtTransactionMethod("RefreshCache"), 0, false)
+	if call.Err != nil {
+		return call.Err
+	}
+	call = obj.Call(FmtTransactionMethod("InstallPackages"), 0, transactionFlags, packageIDs)
 	if call.Err != nil {
 		return call.Err
 	}
@@ -593,7 +597,7 @@ loop:
 
 // GetUpdates gets a list of packages that are installed and which can be updated, mod filter.
 func (bus *Conn) GetUpdates(filter uint64) ([]string, error) {
-	if PK_DEBUG {
+	if Debug {
 		log.Println("PackageKit: GetUpdates()")
 	}
 	packageIDs := []string{}
@@ -664,11 +668,11 @@ func (bus *Conn) PackagesToPackageIDs(packageMap map[string]string, filter uint6
 		count++
 	}
 
-	if !(filter&PK_FILTER_ENUM_ARCH == PK_FILTER_ENUM_ARCH) {
-		filter += PK_FILTER_ENUM_ARCH // always search in our arch
+	if !(filter&PkFilterEnumArch == PkFilterEnumArch) {
+		filter += PkFilterEnumArch // always search in our arch
 	}
 
-	if PK_DEBUG {
+	if Debug {
 		log.Printf("PackageKit: PackagesToPackageIDs(): %v", strings.Join(packages, ", "))
 	}
 	resolved, e := bus.ResolvePackages(packages, filter)
@@ -771,7 +775,7 @@ func (bus *Conn) PackagesToPackageIDs(packageMap map[string]string, filter uint6
 	// this check is for packages that need to verify their "newest" status
 	// we need to know this so we can install the correct newest packageID!
 	recursion := make(map[string]*PkPackageIDActionData)
-	if !(filter&PK_FILTER_ENUM_NEWEST == PK_FILTER_ENUM_NEWEST) {
+	if !(filter&PkFilterEnumNewest == PkFilterEnumNewest) {
 		checkPackages := []string{}
 		filteredPackageMap := make(map[string]string)
 		for index, pkg := range packages {
@@ -788,13 +792,13 @@ func (bus *Conn) PackagesToPackageIDs(packageMap map[string]string, filter uint6
 		}
 
 		// we _could_ do a second resolve and then parse like this...
-		//resolved, e := bus.ResolvePackages(..., filter+PK_FILTER_ENUM_NEWEST)
+		//resolved, e := bus.ResolvePackages(..., filter+PkFilterEnumNewest)
 		// but that's basically what recursion here could do too!
 		if len(checkPackages) > 0 {
-			if PK_DEBUG {
+			if Debug {
 				log.Printf("PackageKit: PackagesToPackageIDs(): Recurse: %v", strings.Join(checkPackages, ", "))
 			}
-			recursion, e = bus.PackagesToPackageIDs(filteredPackageMap, filter+PK_FILTER_ENUM_NEWEST)
+			recursion, e = bus.PackagesToPackageIDs(filteredPackageMap, filter+PkFilterEnumNewest)
 			if e != nil {
 				return nil, fmt.Errorf("Recursion error: %v", e)
 			}

resources/password.go

@@ -3,23 +3,22 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
 	"crypto/rand"
-	"encoding/gob"
 	"fmt"
 	"io/ioutil"
 	"log"
@@ -35,7 +34,6 @@ import (
 
 func init() {
 	RegisterResource("password", func() Res { return &PasswordRes{} })
-	gob.Register(&PasswordRes{})
 }
 
 const (
@@ -74,7 +72,6 @@ func (obj *PasswordRes) Validate() error {
 // Init generates a new password for this resource if one was not provided. It
 // will save this into a local file. It will load it back in from previous runs.
 func (obj *PasswordRes) Init() error {
-	obj.BaseRes.Kind = "password" // must be set before using VarDir
 
 	dir, err := obj.VarDir("")
 	if err != nil {

resources/pkg.go

@@ -3,22 +3,21 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
-	"encoding/gob"
 	"fmt"
 	"log"
 	"path"
@@ -32,7 +31,6 @@ import (
 
 func init() {
 	RegisterResource("pkg", func() Res { return &PkgRes{} })
-	gob.Register(&PkgRes{})
 }
 
 // PkgRes is a package resource for packagekit.
@@ -67,7 +65,6 @@ func (obj *PkgRes) Validate() error {
 
 // Init runs some startup code for this resource.
 func (obj *PkgRes) Init() error {
-	obj.BaseRes.Kind = "pkg"
 	if err := obj.BaseRes.Init(); err != nil { // call base init, b/c we're overriding
 		return err
 	}
@@ -180,22 +177,22 @@ func (obj *PkgRes) groupMappingHelper() map[string]string {
 }
 
 func (obj *PkgRes) pkgMappingHelper(bus *packagekit.Conn) (map[string]*packagekit.PkPackageIDActionData, error) {
-	packageMap := obj.groupMappingHelper()   // get the grouped values
-	packageMap[obj.Name] = obj.State         // key is pkg name, value is pkg state
-	var filter uint64                        // initializes at the "zero" value of 0
-	filter += packagekit.PK_FILTER_ENUM_ARCH // always search in our arch (optional!)
+	packageMap := obj.groupMappingHelper() // get the grouped values
+	packageMap[obj.Name] = obj.State       // key is pkg name, value is pkg state
+	var filter uint64                      // initializes at the "zero" value of 0
+	filter += packagekit.PkFilterEnumArch  // always search in our arch (optional!)
 	// we're requesting latest version, or to narrow down install choices!
 	if obj.State == "newest" || obj.State == "installed" {
 		// if we add this, we'll still see older packages if installed
 		// this is an optimization, and is *optional*, this logic is
 		// handled inside of PackagesToPackageIDs now automatically!
-		filter += packagekit.PK_FILTER_ENUM_NEWEST // only search for newest packages
+		filter += packagekit.PkFilterEnumNewest // only search for newest packages
 	}
 	if !obj.AllowNonFree {
-		filter += packagekit.PK_FILTER_ENUM_FREE
+		filter += packagekit.PkFilterEnumFree
 	}
 	if !obj.AllowUnsupported {
-		filter += packagekit.PK_FILTER_ENUM_SUPPORTED
+		filter += packagekit.PkFilterEnumSupported
 	}
 	result, err := bus.PackagesToPackageIDs(packageMap, filter)
 	if err != nil {
@@ -301,7 +298,7 @@ func (obj *PkgRes) CheckApply(apply bool) (checkOK bool, err error) {
 
 	var transactionFlags uint64 // initializes at the "zero" value of 0
 	if !obj.AllowUntrusted {    // allow
-		transactionFlags += packagekit.PK_TRANSACTION_FLAG_ENUM_ONLY_TRUSTED
+		transactionFlags += packagekit.PkTransactionFlagEnumOnlyTrusted
 	}
 	// apply correct state!
 	log.Printf("%s: Set: %v...", obj.fmtNames(util.StrListIntersection(applyPackages, obj.getNames())), obj.State)

resources/pkg_test.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/refresh.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/resources.go

@@ -3,22 +3,23 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // Package resources provides the resource framework and idempotent primitives.
 package resources
 
 import (
+	"encoding/gob"
 	"fmt"
 	"log"
 	"math"
@@ -43,18 +44,40 @@ var registeredResources = map[string]func() Res{}
 
 // RegisterResource registers a new resource by providing a constructor
 // function that returns a resource object ready to be unmarshalled from YAML.
-func RegisterResource(name string, creator func() Res) {
-	registeredResources[name] = creator
+func RegisterResource(kind string, fn func() Res) {
+	if _, ok := registeredResources[kind]; ok {
+		panic(fmt.Sprintf("a resource kind of %s is already registered", kind))
+	}
+	gob.Register(fn())
+	registeredResources[kind] = fn
 }
 
-// NewEmptyNamedResource returns an empty resource object from a registered
-// type, ready to be unmarshalled.
-func NewEmptyNamedResource(name string) (Res, error) {
-	fn, ok := registeredResources[name]
+// NewResource returns an empty resource object from a registered kind. It
+// errors if the resource kind doesn't exist.
+func NewResource(kind string) (Res, error) {
+	fn, ok := registeredResources[kind]
 	if !ok {
-		return nil, fmt.Errorf("no resource named %s available", name)
+		return nil, fmt.Errorf("no resource kind `%s` available", kind)
 	}
-	return fn(), nil
+	res := fn().Default()
+	res.SetKind(kind)
+	//*res.Meta() = DefaultMetaParams // TODO: centralize this here?
+	return res, nil
+}
+
+// NewNamedResource returns an empty resource object from a registered kind. It
+// also sets the name. It is a wrapper around NewResource. It also errors if the
+// name is empty.
+func NewNamedResource(kind, name string) (Res, error) {
+	if name == "" {
+		return nil, fmt.Errorf("resource name is empty")
+	}
+	res, err := NewResource(kind)
+	if err != nil {
+		return nil, err
+	}
+	res.SetName(name)
+	return res, nil
 }
 
 //go:generate stringer -type=ResState -output=resstate_stringer.go
@@ -108,11 +131,13 @@ type ResData struct {
 // The Base interface is everything that is common to all resources.
 // Everything here only needs to be implemented once, in the BaseRes.
 type Base interface {
+	fmt.Stringer // String() string
+
 	GetName() string // can't be named "Name()" because of struct field
 	SetName(string)
 	SetKind(string)
 	GetKind() string
-	String() string
+
 	Meta() *MetaParams
 	Events() chan *event.Event
 	Data() *ResData
@@ -130,6 +155,7 @@ type Base interface {
 	Refresh() bool                         // is there a pending refresh to run?
 	SetRefresh(bool)                       // set the refresh state of this resource
 	SendRecv(Res) (map[string]bool, error) // send->recv data passing function
+	SetRecv(map[string]*Send)
 	IsStateOK() bool
 	StateOK(b bool)
 	GroupCmp(Res) bool  // TODO: is there a better name for this?
@@ -520,6 +546,19 @@ func (obj *BaseRes) Compare(res Res) bool {
 	if !cmpSlices(obj.Meta().Sema, res.Meta().Sema) {
 		return false
 	}
+
+	// if resources are grouped, are the groups the same?
+	if i, j := obj.GetGroup(), res.GetGroup(); len(i) != len(j) {
+		return false
+	} else if len(i) > 0 { // trick the golinter
+		ix, jx := Sort(i), Sort(j)
+		for k := range ix {
+			if !ix[k].Compare(jx[k]) { // compare sub resources
+				return false
+			}
+		}
+	}
+
 	return true
 }
 

resources/resources_test.go

@@ -3,24 +3,21 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
-	"bytes"
-	"encoding/base64"
-	"encoding/gob"
 	"testing"
 )
 
@@ -42,6 +39,7 @@ func TestCompare2(t *testing.T) {
 	r1 := &NoopRes{
 		BaseRes: BaseRes{
 			Name: "noop1",
+			Kind: "noop",
 			MetaParams: MetaParams{
 				Noop: true,
 			},
@@ -49,7 +47,8 @@ func TestCompare2(t *testing.T) {
 	}
 	r2 := &NoopRes{
 		BaseRes: BaseRes{
-			Name: "noop1", // same nampe
+			Name: "noop1", // same name
+			Kind: "noop",
 			MetaParams: MetaParams{
 				Noop: false, // different noop
 			},
@@ -65,86 +64,6 @@ func TestCompare2(t *testing.T) {
 	}
 }
 
-func TestMiscEncodeDecode1(t *testing.T) {
-	var err error
-	//gob.Register( &NoopRes{} ) // happens in noop.go : init()
-	//gob.Register( &FileRes{} ) // happens in file.go : init()
-	// ...
-
-	// encode
-	var input interface{} = &FileRes{}
-	b1 := bytes.Buffer{}
-	e := gob.NewEncoder(&b1)
-	err = e.Encode(&input) // pass with &
-	if err != nil {
-		t.Errorf("Gob failed to Encode: %v", err)
-	}
-	str := base64.StdEncoding.EncodeToString(b1.Bytes())
-
-	// decode
-	var output interface{}
-	bb, err := base64.StdEncoding.DecodeString(str)
-	if err != nil {
-		t.Errorf("Base64 failed to Decode: %v", err)
-	}
-	b2 := bytes.NewBuffer(bb)
-	d := gob.NewDecoder(b2)
-	err = d.Decode(&output) // pass with &
-	if err != nil {
-		t.Errorf("Gob failed to Decode: %v", err)
-	}
-
-	res1, ok := input.(Res)
-	if !ok {
-		t.Errorf("Input %v is not a Res", res1)
-		return
-	}
-	res2, ok := output.(Res)
-	if !ok {
-		t.Errorf("Output %v is not a Res", res2)
-		return
-	}
-	if !res1.Compare(res2) {
-		t.Error("The input and output Res values do not match!")
-	}
-}
-
-func TestMiscEncodeDecode2(t *testing.T) {
-	var err error
-	//gob.Register( &NoopRes{} ) // happens in noop.go : init()
-	//gob.Register( &FileRes{} ) // happens in file.go : init()
-	// ...
-
-	// encode
-	var input Res = &FileRes{}
-
-	b64, err := ResToB64(input)
-	if err != nil {
-		t.Errorf("Can't encode: %v", err)
-		return
-	}
-
-	output, err := B64ToRes(b64)
-	if err != nil {
-		t.Errorf("Can't decode: %v", err)
-		return
-	}
-
-	res1, ok := input.(Res)
-	if !ok {
-		t.Errorf("Input %v is not a Res", res1)
-		return
-	}
-	res2, ok := output.(Res)
-	if !ok {
-		t.Errorf("Output %v is not a Res", res2)
-		return
-	}
-	if !res1.Compare(res2) {
-		t.Error("The input and output Res values do not match!")
-	}
-}
-
 func TestIFF(t *testing.T) {
 	uid := &BaseUID{Name: "/tmp/unit-test"}
 	same := &BaseUID{Name: "/tmp/unit-test"}

resources/semaphore.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/semaphore_test.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
@@ -41,6 +41,7 @@ func NewNoopResTestSema(name string, semas []string) *NoopResTest {
 		NoopRes: NoopRes{
 			BaseRes: BaseRes{
 				Name: name,
+				Kind: "noop",
 				MetaParams: MetaParams{
 					AutoGroup: true, // always autogroup
 					Sema:      semas,

resources/sendrecv.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
@@ -173,6 +173,11 @@ type Send struct {
 	Changed bool // set to true if this key was updated, read only!
 }
 
+// SetRecv sets the Res Recv field to given map of Send structs.
+func (obj *BaseRes) SetRecv(recv map[string]*Send) {
+	obj.Recv = recv
+}
+
 // SendRecv pulls in the sent values into the receive slots. It is called by the
 // receiver and must be given as input the full resource struct to receive on.
 func (obj *BaseRes) SendRecv(res Res) (map[string]bool, error) {

resources/svc.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 // DOCS: https://godoc.org/github.com/coreos/go-systemd/dbus
@@ -20,7 +20,6 @@
 package resources
 
 import (
-	"encoding/gob"
 	"fmt"
 	"log"
 
@@ -34,7 +33,6 @@ import (
 
 func init() {
 	RegisterResource("svc", func() Res { return &SvcRes{} })
-	gob.Register(&SvcRes{})
 }
 
 // SvcRes is a service resource for systemd units.
@@ -67,7 +65,6 @@ func (obj *SvcRes) Validate() error {
 
 // Init runs some startup code for this resource.
 func (obj *SvcRes) Init() error {
-	obj.BaseRes.Kind = "svc"
 	return obj.BaseRes.Init() // call base init, b/c we're overriding
 }
 

resources/timer.go

@@ -3,22 +3,21 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
 
 import (
-	"encoding/gob"
 	"fmt"
 	"log"
 	"time"
@@ -26,7 +25,6 @@ import (
 
 func init() {
 	RegisterResource("timer", func() Res { return &TimerRes{} })
-	gob.Register(&TimerRes{})
 }
 
 // TimerRes is a timer resource for time based events.
@@ -59,7 +57,6 @@ func (obj *TimerRes) Validate() error {
 
 // Init runs some startup code for this resource.
 func (obj *TimerRes) Init() error {
-	obj.BaseRes.Kind = "timer"
 	return obj.BaseRes.Init() // call base init, b/c we're overrriding
 }
 

resources/uid.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources

resources/user.go

@@ -0,0 +1,451 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package resources
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os/exec"
+	"os/user"
+	"sort"
+	"strconv"
+	"strings"
+	"syscall"
+
+	"github.com/purpleidea/mgmt/recwatch"
+
+	errwrap "github.com/pkg/errors"
+)
+
+func init() {
+	RegisterResource("user", func() Res { return &UserRes{} })
+}
+
+const passwdFile = "/etc/passwd"
+
+// UserRes is a user account resource.
+type UserRes struct {
+	BaseRes           `yaml:",inline"`
+	State             string   `yaml:"state"`             // state: exists, absent
+	UID               *uint32  `yaml:"uid"`               // uid must be unique unless AllowDuplicateUID is true
+	GID               *uint32  `yaml:"gid"`               // gid of the user's primary group
+	Group             *string  `yaml:"group"`             // name of the user's primary group
+	Groups            []string `yaml:"groups"`            // list of supplemental groups
+	HomeDir           *string  `yaml:"homedir"`           // path to the user's home directory
+	AllowDuplicateUID bool     `yaml:"allowduplicateuid"` // allow duplicate uid
+
+	recWatcher *recwatch.RecWatcher
+}
+
+// Default returns some sensible defaults for this resource.
+func (obj *UserRes) Default() Res {
+	return &UserRes{
+		BaseRes: BaseRes{
+			MetaParams: DefaultMetaParams, // force a default
+		},
+	}
+}
+
+// Validate if the params passed in are valid data.
+func (obj *UserRes) Validate() error {
+	const whitelist string = "_abcdefghijklmnopqrstuvwxyz0123456789"
+
+	if obj.State != "exists" && obj.State != "absent" {
+		return fmt.Errorf("state must be 'exists' or 'absent'")
+	}
+	if obj.GID != nil && obj.Group != nil {
+		return fmt.Errorf("cannot use both GID and Group")
+	}
+	if obj.Group != nil {
+		if *obj.Group == "" {
+			return fmt.Errorf("group cannot be empty string")
+		}
+		for _, char := range *obj.Group {
+			if !strings.Contains(whitelist, string(char)) {
+				return fmt.Errorf("group contains invalid character(s)")
+			}
+		}
+	}
+	if obj.Groups != nil {
+		for _, group := range obj.Groups {
+			if group == "" {
+				return fmt.Errorf("group cannot be empty string")
+			}
+			for _, char := range group {
+				if !strings.Contains(whitelist, string(char)) {
+					return fmt.Errorf("groups list contains invalid character(s)")
+				}
+			}
+		}
+	}
+	return obj.BaseRes.Validate()
+}
+
+// Init initializes the resource.
+func (obj *UserRes) Init() error {
+	return obj.BaseRes.Init() // call base init, b/c we're overriding
+}
+
+// Watch is the primary listener for this resource and it outputs events.
+func (obj *UserRes) Watch() error {
+	var err error
+	obj.recWatcher, err = recwatch.NewRecWatcher(passwdFile, false)
+	if err != nil {
+		return err
+	}
+	defer obj.recWatcher.Close()
+
+	// notify engine that we're running
+	if err := obj.Running(); err != nil {
+		return err // bubble up a NACK...
+	}
+
+	var send = false // send event?
+	var exit *error
+
+	for {
+		if obj.debug {
+			log.Printf("%s: Watching: %s", obj, passwdFile) // attempting to watch...
+		}
+
+		select {
+		case event, ok := <-obj.recWatcher.Events():
+			if !ok { // channel shutdown
+				return nil
+			}
+			if err := event.Error; err != nil {
+				return errwrap.Wrapf(err, "Unknown %s watcher error", obj)
+			}
+			if obj.debug { // don't access event.Body if event.Error isn't nil
+				log.Printf("%s: Event(%s): %v", obj, event.Body.Name, event.Body.Op)
+			}
+			send = true
+			obj.StateOK(false) // dirty
+
+		case event := <-obj.Events():
+			if exit, send = obj.ReadEvent(event); exit != nil {
+				return *exit // exit
+			}
+			//obj.StateOK(false) // dirty // these events don't invalidate state
+		}
+
+		// do all our event sending all together to avoid duplicate msgs
+		if send {
+			send = false
+			obj.Event()
+		}
+	}
+}
+
+// CheckApply method for User resource.
+func (obj *UserRes) CheckApply(apply bool) (checkOK bool, err error) {
+	log.Printf("%s: CheckApply(%t)", obj, apply)
+
+	var exists = true
+	usr, err := user.Lookup(obj.GetName())
+	if err != nil {
+		if _, ok := err.(user.UnknownUserError); !ok {
+			return false, errwrap.Wrapf(err, "error looking up user")
+		}
+		exists = false
+	}
+
+	if obj.AllowDuplicateUID == false && obj.UID != nil {
+		existingUID, err := user.LookupId(strconv.Itoa(int(*obj.UID)))
+		if err != nil {
+			if _, ok := err.(user.UnknownUserIdError); !ok {
+				return false, errwrap.Wrapf(err, "error looking up UID")
+			}
+		} else if existingUID.Username != obj.GetName() {
+			return false, fmt.Errorf("the requested UID is already taken")
+		}
+	}
+
+	if obj.State == "absent" && !exists {
+		return true, nil
+	}
+
+	if usercheck := true; exists && obj.State == "exists" {
+		intUID, err := strconv.Atoi(usr.Uid)
+		if err != nil {
+			return false, errwrap.Wrapf(err, "error casting UID to int")
+		}
+		intGID, err := strconv.Atoi(usr.Gid)
+		if err != nil {
+			return false, errwrap.Wrapf(err, "error casting GID to int")
+		}
+		if obj.UID != nil && int(*obj.UID) != intUID {
+			usercheck = false
+		}
+		if obj.GID != nil && int(*obj.GID) != intGID {
+			usercheck = false
+		}
+		if obj.HomeDir != nil && *obj.HomeDir != usr.HomeDir {
+			usercheck = false
+		}
+		if usercheck {
+			return true, nil
+		}
+	}
+
+	if !apply {
+		return false, nil
+	}
+
+	var cmdName string
+	var args []string
+	if obj.State == "exists" {
+		if exists {
+			cmdName = "usermod"
+			log.Printf("%s: Modifying user: %s", obj, obj.GetName())
+		} else {
+			cmdName = "useradd"
+			log.Printf("%s: Adding user: %s", obj, obj.GetName())
+		}
+		if obj.AllowDuplicateUID {
+			args = append(args, "--non-unique")
+		}
+		if obj.UID != nil {
+			args = append(args, "-u", fmt.Sprintf("%d", *obj.UID))
+		}
+		if obj.GID != nil {
+			args = append(args, "-g", fmt.Sprintf("%d", *obj.GID))
+		}
+		if obj.Group != nil {
+			args = append(args, "-g", *obj.Group)
+		}
+		if obj.Groups != nil {
+			args = append(args, "-G", strings.Join(obj.Groups, ","))
+		}
+		if obj.HomeDir != nil {
+			args = append(args, "-d", *obj.HomeDir)
+		}
+	}
+	if obj.State == "absent" {
+		cmdName = "userdel"
+		log.Printf("%s: Deleting user: %s", obj, obj.GetName())
+	}
+
+	args = append(args, obj.GetName())
+
+	cmd := exec.Command(cmdName, args...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		Setpgid: true,
+		Pgid:    0,
+	}
+
+	// open a pipe to get error messages from os/exec
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		return false, errwrap.Wrapf(err, "failed to initialize stderr pipe")
+	}
+
+	// start the command
+	if err := cmd.Start(); err != nil {
+		return false, errwrap.Wrapf(err, "cmd failed to start")
+	}
+	// capture any error messages
+	slurp, err := ioutil.ReadAll(stderr)
+	if err != nil {
+		return false, errwrap.Wrapf(err, "error slurping error message")
+	}
+	// wait until cmd exits and return error message if any
+	if err := cmd.Wait(); err != nil {
+		return false, errwrap.Wrapf(err, "%s", slurp)
+	}
+
+	return false, nil
+}
+
+// UserUID is the UID struct for UserRes.
+type UserUID struct {
+	BaseUID
+	name string
+}
+
+// UserResAutoEdges holds the state of the auto edge generator.
+type UserResAutoEdges struct {
+	UIDs    []ResUID
+	pointer int
+}
+
+// AutoEdges returns edges from the user resource to each group found in
+// its definition. The groups can be in any of the three applicable fields
+// (GID, Group and Groups.) If the user exists, reversed ensures the edge
+// goes from group to user, and if the user is absent the edge goes from
+// user to group. This ensures that we don't add users to groups that
+// don't exist or delete groups before we delete their members.
+func (obj *UserRes) AutoEdges() (AutoEdge, error) {
+	var result []ResUID
+	var reversed bool
+	if obj.State == "exists" {
+		reversed = true
+	}
+	if obj.GID != nil {
+		result = append(result, &GroupUID{
+			BaseUID: BaseUID{
+				Reversed: &reversed,
+			},
+			gid: obj.GID,
+		})
+	}
+	if obj.Group != nil {
+		result = append(result, &GroupUID{
+			BaseUID: BaseUID{
+				Reversed: &reversed,
+			},
+			name: *obj.Group,
+		})
+	}
+	for _, group := range obj.Groups {
+		result = append(result, &GroupUID{
+			BaseUID: BaseUID{
+				Reversed: &reversed,
+			},
+			name: group,
+		})
+	}
+	return &UserResAutoEdges{
+		UIDs:    result,
+		pointer: 0,
+	}, nil
+}
+
+// Next returns the next automatic edge.
+func (obj *UserResAutoEdges) Next() []ResUID {
+	if len(obj.UIDs) == 0 {
+		return nil
+	}
+	value := obj.UIDs[obj.pointer]
+	obj.pointer++
+	return []ResUID{value}
+}
+
+// Test gets results of the earlier Next() call, & returns if we should continue.
+func (obj *UserResAutoEdges) Test(input []bool) bool {
+	if len(obj.UIDs) <= obj.pointer {
+		return false
+	}
+	if len(input) != 1 { // in case we get given bad data
+		log.Fatal("Expecting a single value!")
+	}
+	return true // keep going
+}
+
+// UIDs includes all params to make a unique identification of this object.
+// Most resources only return one, although some resources can return multiple.
+func (obj *UserRes) UIDs() []ResUID {
+	x := &UserUID{
+		BaseUID: BaseUID{Name: obj.GetName(), Kind: obj.GetKind()},
+		name:    obj.Name,
+	}
+	return []ResUID{x}
+}
+
+// GroupCmp returns whether two resources can be grouped together or not.
+func (obj *UserRes) GroupCmp(r Res) bool {
+	_, ok := r.(*UserRes)
+	if !ok {
+		return false
+	}
+	return false
+}
+
+// Compare two resources and return if they are equivalent.
+func (obj *UserRes) Compare(r Res) bool {
+	// we can only compare UserRes to others of the same resource kind
+	res, ok := r.(*UserRes)
+	if !ok {
+		return false
+	}
+	if !obj.BaseRes.Compare(res) { // call base Compare
+		return false
+	}
+	if obj.Name != res.Name {
+		return false
+	}
+	if obj.State != res.State {
+		return false
+	}
+	if (obj.UID == nil) != (res.UID == nil) {
+		return false
+	}
+	if obj.UID != nil && res.UID != nil {
+		if *obj.UID != *res.UID {
+			return false
+		}
+	}
+	if (obj.GID == nil) != (res.GID == nil) {
+		return false
+	}
+	if obj.GID != nil && res.GID != nil {
+		if *obj.GID != *res.GID {
+			return false
+		}
+	}
+	if (obj.Groups == nil) != (res.Groups == nil) {
+		return false
+	}
+	if obj.Groups != nil && res.Groups != nil {
+		if len(obj.Groups) != len(res.Groups) {
+			return false
+		}
+		objGroups := obj.Groups
+		resGroups := res.Groups
+		sort.Strings(objGroups)
+		sort.Strings(resGroups)
+		for i := range objGroups {
+			if objGroups[i] != resGroups[i] {
+				return false
+			}
+		}
+	}
+	if (obj.HomeDir == nil) != (res.HomeDir == nil) {
+		return false
+	}
+	if obj.HomeDir != nil && res.HomeDir != nil {
+		if *obj.HomeDir != *obj.HomeDir {
+			return false
+		}
+	}
+	if obj.AllowDuplicateUID != res.AllowDuplicateUID {
+		return false
+	}
+	return true
+}
+
+// UnmarshalYAML is the custom unmarshal handler for this struct.
+// It is primarily useful for setting the defaults.
+func (obj *UserRes) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	type rawRes UserRes // indirection to avoid infinite recursion
+
+	def := obj.Default()      // get the default
+	res, ok := def.(*UserRes) // put in the right format
+	if !ok {
+		return fmt.Errorf("could not convert to UserRes")
+	}
+	raw := rawRes(*res) // convert; the defaults go here
+
+	if err := unmarshal(&raw); err != nil {
+		return err
+	}
+
+	*obj = UserRes(raw) // restore from indirection with type conversion!
+	return nil
+}

resources/util.go

@@ -3,16 +3,16 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package resources
@@ -22,10 +22,37 @@ import (
 	"encoding/base64"
 	"encoding/gob"
 	"fmt"
+	"reflect"
+	"sort"
+	"strings"
 
 	errwrap "github.com/pkg/errors"
 )
 
+const (
+	// StructTag is the key we use in struct field names for key mapping.
+	StructTag = "lang"
+)
+
+// ResourceSlice is a linear list of resources. It can be sorted.
+type ResourceSlice []Res
+
+func (rs ResourceSlice) Len() int           { return len(rs) }
+func (rs ResourceSlice) Swap(i, j int)      { rs[i], rs[j] = rs[j], rs[i] }
+func (rs ResourceSlice) Less(i, j int) bool { return rs[i].String() < rs[j].String() }
+
+// Sort the list of resources and return a copy without modifying the input.
+func Sort(rs []Res) []Res {
+	resources := []Res{}
+	for _, r := range rs { // copy
+		resources = append(resources, r)
+	}
+	sort.Sort(ResourceSlice(resources))
+	return resources
+	// sort.Sort(ResourceSlice(rs)) // this is wrong, it would modify input!
+	//return rs
+}
+
 // ResToB64 encodes a resource to a base64 encoded string (after serialization).
 func ResToB64(res Res) (string, error) {
 	b := bytes.Buffer{}
@@ -52,8 +79,57 @@ func B64ToRes(str string) (Res, error) {
 	}
 	res, ok := output.(Res)
 	if !ok {
-		return nil, fmt.Errorf("Output %v is not a Res", res)
+		return nil, fmt.Errorf("output `%v` is not a Res", output)
 
 	}
 	return res, nil
 }
+
+// StructTagToFieldName returns a mapping from recommended alias to actual field
+// name. It returns an error if it finds a collision. It uses the `lang` tags.
+func StructTagToFieldName(res Res) (map[string]string, error) {
+	// TODO: fallback to looking up yaml tags, although harder to parse
+	result := make(map[string]string) // `lang` field tag -> field name
+	st := reflect.TypeOf(res).Elem()  // elem for ptr to res
+	for i := 0; i < st.NumField(); i++ {
+		field := st.Field(i)
+		name := field.Name
+		// TODO: golang 1.7+
+		// if !ok, then nothing is found
+		//if alias, ok := field.Tag.Lookup(StructTag); ok { // golang 1.7+
+		if alias := field.Tag.Get(StructTag); alias != "" { // golang 1.6
+			if val, exists := result[alias]; exists {
+				return nil, fmt.Errorf("field `%s` uses the same key `%s` as field `%s`", name, alias, val)
+			}
+			// empty string ("") is a valid value
+			if alias != "" {
+				result[alias] = name
+			}
+		}
+	}
+	return result, nil
+}
+
+// LowerStructFieldNameToFieldName returns a mapping from the lower case version
+// of each field name to the actual field name. It only returns public fields.
+// It returns an error if it finds a collision.
+func LowerStructFieldNameToFieldName(res Res) (map[string]string, error) {
+	result := make(map[string]string) // lower field name -> field name
+	st := reflect.TypeOf(res).Elem()  // elem for ptr to res
+	for i := 0; i < st.NumField(); i++ {
+		field := st.Field(i)
+		name := field.Name
+
+		if strings.Title(name) != name { // must have been a priv field
+			continue
+		}
+
+		if alias := strings.ToLower(name); alias != "" {
+			if val, exists := result[alias]; exists {
+				return nil, fmt.Errorf("field `%s` uses the same key `%s` as field `%s`", name, alias, val)
+			}
+			result[alias] = name
+		}
+	}
+	return result, nil
+}

resources/util_test.go

@@ -0,0 +1,238 @@
+// Mgmt
+// Copyright (C) 2013-2017+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package resources
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/gob"
+	"reflect"
+	"testing"
+)
+
+func TestSort0(t *testing.T) {
+	rs := []Res{}
+	s := Sort(rs)
+
+	if !reflect.DeepEqual(s, []Res{}) {
+		t.Errorf("sort failed!")
+		if s == nil {
+			t.Logf("output is nil!")
+		} else {
+			str := "Got:"
+			for _, r := range s {
+				str += " " + r.String()
+			}
+			t.Errorf(str)
+		}
+	}
+}
+
+func TestSort1(t *testing.T) {
+	r1, _ := NewNamedResource("noop", "noop1")
+	r2, _ := NewNamedResource("noop", "noop2")
+	r3, _ := NewNamedResource("noop", "noop3")
+	r4, _ := NewNamedResource("noop", "noop4")
+	r5, _ := NewNamedResource("noop", "noop5")
+	r6, _ := NewNamedResource("noop", "noop6")
+
+	rs := []Res{r3, r2, r6, r1, r5, r4}
+	s := Sort(rs)
+
+	if !reflect.DeepEqual(s, []Res{r1, r2, r3, r4, r5, r6}) {
+		t.Errorf("sort failed!")
+		str := "Got:"
+		for _, r := range s {
+			str += " " + r.String()
+		}
+		t.Errorf(str)
+	}
+
+	if !reflect.DeepEqual(rs, []Res{r3, r2, r6, r1, r5, r4}) {
+		t.Errorf("sort modified input!")
+		str := "Got:"
+		for _, r := range rs {
+			str += " " + r.String()
+		}
+		t.Errorf(str)
+	}
+}
+
+func TestMiscEncodeDecode1(t *testing.T) {
+	var err error
+
+	// encode
+	var input interface{} = &FileRes{}
+	b1 := bytes.Buffer{}
+	e := gob.NewEncoder(&b1)
+	err = e.Encode(&input) // pass with &
+	if err != nil {
+		t.Errorf("Gob failed to Encode: %v", err)
+	}
+	str := base64.StdEncoding.EncodeToString(b1.Bytes())
+
+	// decode
+	var output interface{}
+	bb, err := base64.StdEncoding.DecodeString(str)
+	if err != nil {
+		t.Errorf("Base64 failed to Decode: %v", err)
+	}
+	b2 := bytes.NewBuffer(bb)
+	d := gob.NewDecoder(b2)
+	err = d.Decode(&output) // pass with &
+	if err != nil {
+		t.Errorf("Gob failed to Decode: %v", err)
+	}
+
+	res1, ok := input.(Res)
+	if !ok {
+		t.Errorf("Input %v is not a Res", res1)
+		return
+	}
+	res2, ok := output.(Res)
+	if !ok {
+		t.Errorf("Output %v is not a Res", res2)
+		return
+	}
+	if !res1.Compare(res2) {
+		t.Error("The input and output Res values do not match!")
+	}
+}
+
+func TestMiscEncodeDecode2(t *testing.T) {
+	var err error
+
+	// encode
+	input, err := NewNamedResource("file", "file1")
+	if err != nil {
+		t.Errorf("Can't create: %v", err)
+		return
+	}
+
+	b64, err := ResToB64(input)
+	if err != nil {
+		t.Errorf("Can't encode: %v", err)
+		return
+	}
+
+	output, err := B64ToRes(b64)
+	if err != nil {
+		t.Errorf("Can't decode: %v", err)
+		return
+	}
+
+	res1, ok := input.(Res)
+	if !ok {
+		t.Errorf("Input %v is not a Res", res1)
+		return
+	}
+	res2, ok := output.(Res)
+	if !ok {
+		t.Errorf("Output %v is not a Res", res2)
+		return
+	}
+	if !res1.Compare(res2) {
+		t.Error("The input and output Res values do not match!")
+	}
+}
+
+func TestStructTagToFieldName0(t *testing.T) {
+	type TestStruct struct {
+		// TODO: switch this to TestRes when it is in git master
+		NoopRes        // so that this struct implements `Res`
+		Alpha   bool   `lang:"alpha" yaml:"nope"`
+		Beta    string `yaml:"beta"`
+		Gamma   string
+		Delta   int `lang:"surprise"`
+	}
+
+	mapping, err := StructTagToFieldName(&TestStruct{})
+	if err != nil {
+		t.Errorf("failed: %+v", err)
+		return
+	}
+
+	expected := map[string]string{
+		"alpha":    "Alpha",
+		"surprise": "Delta",
+	}
+
+	if !reflect.DeepEqual(mapping, expected) {
+		t.Errorf("expected: %+v", expected)
+		t.Errorf("received: %+v", mapping)
+	}
+}
+
+func TestLowerStructFieldNameToFieldName0(t *testing.T) {
+	type TestStruct struct {
+		// TODO: switch this to TestRes when it is in git master
+		NoopRes   // so that this struct implements `Res`
+		Alpha     bool
+		skipMe    bool
+		Beta      string
+		IAmACamel uint
+		pass      *string
+		Gamma     string
+		Delta     int
+	}
+
+	mapping, err := LowerStructFieldNameToFieldName(&TestStruct{})
+	if err != nil {
+		t.Errorf("failed: %+v", err)
+		return
+	}
+
+	expected := map[string]string{
+		"noopres": "NoopRes", // TODO: switch this to TestRes when it is in git master
+		"alpha":   "Alpha",
+		//"skipme": "skipMe",
+		"beta":      "Beta",
+		"iamacamel": "IAmACamel",
+		//"pass": "pass",
+		"gamma": "Gamma",
+		"delta": "Delta",
+	}
+
+	if !reflect.DeepEqual(mapping, expected) {
+		t.Errorf("expected: %+v", expected)
+		t.Errorf("received: %+v", mapping)
+	}
+}
+
+func TestLowerStructFieldNameToFieldName1(t *testing.T) {
+	type TestStruct struct {
+		// TODO: switch this to TestRes when it is in git master
+		NoopRes // so that this struct implements `Res`
+		Alpha   bool
+		skipMe  bool
+		Beta    string
+		// these two should collide
+		DoubleWord bool
+		Doubleword string
+		IAmACamel  uint
+		pass       *string
+		Gamma      string
+		Delta      int
+	}
+
+	mapping, err := LowerStructFieldNameToFieldName(&TestStruct{})
+	if err == nil {
+		t.Errorf("expected failure, but passed with: %+v", mapping)
+		return
+	}
+}

resources/virt.go

@@ -3,29 +3,30 @@
 // Written by James Shubin <james@shubin.ca> and the project contributors
 //
 // This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
+// it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
+// GNU General Public License for more details.
 //
-// You should have received a copy of the GNU Affero General Public License
+// You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 // +build !novirt
 
 package resources
 
 import (
-	"encoding/gob"
 	"fmt"
 	"log"
 	"math/rand"
 	"net/url"
 	"os/user"
 	"path"
+	"regexp"
 	"strings"
 	"sync"
 	"time"
@@ -38,7 +39,6 @@ import (
 
 func init() {
 	RegisterResource("virt", func() Res { return &VirtRes{} })
-	gob.Register(&VirtRes{})
 }
 
 const (
@@ -192,7 +192,6 @@ func (obj *VirtRes) Init() error {
 		}
 	}
 	obj.wg = &sync.WaitGroup{}
-	obj.BaseRes.Kind = "virt"
 	return obj.BaseRes.Init() // call base init, b/c we're overriding
 }
 
@@ -1000,7 +999,7 @@ func (d *diskDevice) GetXML(idx int) string {
 	b += "<disk type='file' device='disk'>"
 	b += fmt.Sprintf("<driver name='qemu' type='%s'/>", d.Type)
 	b += fmt.Sprintf("<source file='%s'/>", source)
-	b += fmt.Sprintf("<target dev='vd%s' bus='virtio'/>", (string)(idx+97)) // TODO: 26, 27... should be 'aa', 'ab'...
+	b += fmt.Sprintf("<target dev='vd%s' bus='virtio'/>", numToAlpha(idx))
 	b += "</disk>"
 	return b
 }
@@ -1011,7 +1010,7 @@ func (d *cdRomDevice) GetXML(idx int) string {
 	b += "<disk type='file' device='cdrom'>"
 	b += fmt.Sprintf("<driver name='qemu' type='%s'/>", d.Type)
 	b += fmt.Sprintf("<source file='%s'/>", source)
-	b += fmt.Sprintf("<target dev='hd%s' bus='ide'/>", (string)(idx+97)) // TODO: 26, 27... should be 'aa', 'ab'...
+	b += fmt.Sprintf("<target dev='hd%s' bus='ide'/>", numToAlpha(idx))
 	b += "<readonly/>"
 	b += "</disk>"
 	return b
@@ -1171,15 +1170,38 @@ func isNotFound(err error) bool {
 	return false // some other error
 }
 
-// expandHome does a simple expansion of the tilde into your $HOME value.
+// expandHome does an expansion of ~/ or ~james/ into user's home dir value.
 func expandHome(p string) (string, error) {
-	// TODO: this doesn't match strings of the form: ~james/...
-	if !strings.HasPrefix(p, "~/") {
-		return p, nil
+	if strings.HasPrefix(p, "~/") {
+		usr, err := user.Current()
+		if err != nil {
+			return p, fmt.Errorf("can't expand ~ into home directory")
+		}
+		return path.Join(usr.HomeDir, p[len("~/"):]), nil
 	}
-	usr, err := user.Current()
+
+	// check if provided path is in format ~username and keep track of provided username
+	r, err := regexp.Compile("~([^/]+)/")
 	if err != nil {
-		return p, fmt.Errorf("can't expand ~ into home directory")
+		return p, errwrap.Wrapf(err, "can't compile regexp")
 	}
-	return path.Join(usr.HomeDir, p[len("~/"):]), nil
+	if match := r.FindStringSubmatch(p); match != nil {
+		username := match[len(match)-1]
+		usr, err := user.Lookup(username)
+		if err != nil {
+			return p, fmt.Errorf("can't expand %s into home directory", match[0])
+		}
+		return path.Join(usr.HomeDir, p[len(match[0]):]), nil
+	}
+
+	return p, nil
+}
+
+func numToAlpha(idx int) string {
+	var mod = idx % 26
+	var div = idx / 26
+	if div > 0 {
+		return numToAlpha(div-1) + string(rune(mod+int('a')))
+	}
+	return string(rune(mod + int('a')))
 }