cli: Add license flag

This patch adds the option to print the license with a cli flag. It
uses go-bindata to store the license file. The file is generated by
running `make bindata` and the result is stored in the bindata
directory.

.gitignore

@@ -6,6 +6,7 @@
 old/
 tmp/
 *_stringer.go
+bindata/*.go
 mgmt
 mgmt.static
 mgmt.iml

Makefile

@@ -16,8 +16,8 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 SHELL = /usr/bin/env bash
-.PHONY: all art cleanart version program path deps run race generate build clean test gofmt yamlfmt format docs rpmbuild mkdirs rpm srpm spec tar upload upload-sources upload-srpms upload-rpms copr
+.PHONY: all art cleanart version program path deps run race bindata generate build clean test gofmt yamlfmt format docs rpmbuild mkdirs rpm srpm spec tar upload upload-sources upload-srpms upload-rpms copr
-.SILENT: clean
+.SILENT: clean bindata
 
 GO_FILES := $(shell find . -name '*.go')
 SVERSION := $(or $(SVERSION),$(shell git describe --match '[0-9]*\.[0-9]*\.[0-9]*' --tags --dirty --always))
@@ -101,10 +101,14 @@ run:
 race:
 	find . -maxdepth 1 -type f -name '*.go' -not -name '*_test.go' | xargs go run -race -ldflags "-X main.program=$(PROGRAM) -X main.version=$(SVERSION)"
 
+# generate go files from non-go source
+bindata:
+	$(MAKE) --quiet -C bindata
+
 generate:
 	go generate
 
-build: $(PROGRAM)
+build: bindata $(PROGRAM)
 
 $(PROGRAM): $(GO_FILES)
 	@echo "Building: $(PROGRAM), version: $(SVERSION)..."
@@ -120,7 +124,7 @@ clean:
 	rm -f *_stringer.go	# generated by `go generate`
 	rm -f *_mock.go		# generated by `go generate`
 
-test:
+test: bindata
 	./test.sh
 
 gofmt:

bindata/Makefile

@@ -0,0 +1,33 @@
+# 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/>.
+
+# The bindata target generates go files from any source defined below. To use
+# the files, import the "bindata" package and use:
+# `bytes, err := bindata.Asset("FILEPATH")`
+# where FILEPATH is the path of the original input file relative to `bindata/`.
+
+.PHONY: build
+default: build
+
+build: bindata.go
+
+# add more input files as dependencies at the end here...
+bindata.go: ../COPYING
+	# go-bindata --pkg bindata -o {OUTPUT} {INPUT}
+	go-bindata --pkg bindata -o ./$@ $^
+	# gofmt the output file
+	gofmt -s -w $@

lib/cli.go

@@ -24,6 +24,7 @@ import (
 	"os/signal"
 	"syscall"
 
+	"github.com/purpleidea/mgmt/bindata"
 	"github.com/purpleidea/mgmt/hcl"
 	"github.com/purpleidea/mgmt/puppet"
 	"github.com/purpleidea/mgmt/yamlgraph"
@@ -188,7 +189,32 @@ func CLI(program, version string, flags Flags) error {
 	app.Metadata = map[string]interface{}{ // additional flags
 		"flags": flags,
 	}
-	//app.Action = ... // without a default action, help runs
+
+	// if no app.Command is specified
+	app.Action = func(c *cli.Context) error {
+		// print the license
+		if c.Bool("license") {
+			license, err := bindata.Asset("../COPYING") // use go-bindata to get the bytes
+			if err != nil {
+				return err
+			}
+
+			fmt.Printf("%s", license)
+			return nil
+		}
+
+		// print help if no flags are set
+		cli.ShowAppHelp(c)
+		return nil
+	}
+
+	// global flags
+	app.Flags = []cli.Flag{
+		cli.BoolFlag{
+			Name:  "license",
+			Usage: "prints the software license",
+		},
+	}
 
 	app.Commands = []cli.Command{
 		{

misc/make-deps.sh

@@ -78,7 +78,8 @@ ret=$?
 if [[ $ret != 0 ]]; then
 	go get golang.org/x/tools/cmd/vet      # add in `go vet` for travis
 fi
-go get golang.org/x/tools/cmd/stringer	# for automatic stringer-ing
+go get golang.org/x/tools/cmd/stringer			# for automatic stringer-ing
-go get github.com/golang/lint/golint	# for `golint`-ing
+go get github.com/jteeuwen/go-bindata/go-bindata	# for compiling in non golang files
+go get github.com/golang/lint/golint			# for `golint`-ing
 go get -u gopkg.in/alecthomas/gometalinter.v1 && mv "$(dirname $(which gometalinter.v1))/gometalinter.v1" "$(dirname $(which gometalinter.v1))/gometalinter" && gometalinter --install	# bonus
 cd "$XPWD" >/dev/null

test/test-golint.sh

@@ -24,7 +24,7 @@ if [ "$COMMITS" != "" ] && [ "$COMMITS" -gt "1" ]; then
 	HACK="yes"
 fi
 
-LINT=`find . -maxdepth 3 -iname '*.go' -not -path './old/*' -not -path './tmp/*' -exec golint {} \;`	# current golint output
+LINT=`find . -maxdepth 3 -iname '*.go' -not -path './old/*' -not -path './tmp/*' -not -path './bindata/*' -exec golint {} \;`	# current golint output
 COUNT=`echo -e "$LINT" | wc -l`	# number of golint problems in current branch
 [ "$LINT" = "" ] && echo PASS && exit	# everything is "perfect"
 echo "$LINT"	# display the issues
@@ -51,7 +51,7 @@ while read -r line; do
 done <<< "$NUMSTAT1"	# three < is the secret to putting a variable into read
 
 git checkout "$PREVIOUS" &>/dev/null	# previous commit
-LINT1=`find . -maxdepth 3 -iname '*.go' -not -path './old/*' -not -path './tmp/*' -exec golint {} \;`
+LINT1=`find . -maxdepth 3 -iname '*.go' -not -path './old/*' -not -path './tmp/*' -not -path './bindata/*' -exec golint {} \;`
 COUNT1=`echo -e "$LINT1" | wc -l`	# number of golint problems in older branch
 
 # clean up

test/test-gometalinter.sh

@@ -43,7 +43,7 @@ gometalinter="$gml"
 
 # loop through directories in an attempt to scan each go package
 # TODO: lint the *.go examples as individual files and not as a single *.go
-for dir in `find . -maxdepth 5 -type d -not -path './old/*' -not -path './old' -not -path './tmp/*' -not -path './tmp' -not -path './.*' -not -path './vendor/*' -not -path './examples/*' -not -path './test/*'`; do
+for dir in `find . -maxdepth 5 -type d -not -path './old/*' -not -path './old' -not -path './tmp/*' -not -path './tmp' -not -path './.*' -not -path './vendor/*' -not -path './bindata/*'-not -path ' ./examples/*' -not -path './test/*'`; do
 	match="$dir/*.go"
 	#echo "match is: $match"
 	if ! ls $match &>/dev/null; then

test/test-headerfmt.sh

@@ -14,7 +14,7 @@ done < "$FILE"
 cd "${ROOT}"
 
 find_files() {
-	git ls-files | grep '\.go$' | grep -v '^examples/' | grep -v '^test/'
+	git ls-files | grep '\.go$' | grep -v '^bindata/' | grep -v '^examples/' | grep -v '^test/'
 }
 
 bad_files=$(