Commit Graph

17 Commits

Author SHA1 Message Date
James Shubin
57ce3fa587 lang: Allow matching underscores in some of the identifier's
This allows matching underscores in some of the identifier's, but not
when they're the last character.

This caused me to suffer a bit of pain tracking down a bug which turned
out to be in the lexer. It started with a failing test that I wrote in:

974c2498c4

and which followed with a fix in:

52682f463a

Glad that's fixed!
2018-12-20 21:21:30 -05:00
James Shubin
158bc1eb2a lang: Add an Apply iterator to the Stmt and Expr API
This adds a new interface Node which must implement the Apply method.
This method traverse the entire AST and applies a function to each node.
Both Stmt and Expr must implement this.
2018-12-20 21:21:30 -05:00
James Shubin
3f42e5f702 lang: Add logging and debug info via a new Init method
This expands the Stmt and Expr interfaces to add an Init method. This
is used to pass in Debug and Logf values, but is also used to validate
the AST. This gets rid of standalone use of the "log" package.
2018-12-20 21:21:30 -05:00
James Shubin
d990d2ad86 travis: Bump to golang 1.10
This requires breaking changes in gofmt. It is hilarious that this was
changed. Oh well. This also moves to the latest stable etcd. Lastly,
this changes the `go vet` testing to test by package, since the new go
vet changed how it works and now fails without this change.
2018-12-11 01:46:17 -05:00
Jonathan Gold
de90b592fb lang: Fix error message format strings
This commit replaces %s with %d in two error messages, where the
argument is an integer, not a string.
2018-12-03 19:27:35 -05:00
James Shubin
05f6ba7297 lang: Add partial recursive support/detection to class
This adds the additional bits onto the class/include statements to
support or detect class recursion. It's not currently supported, but
I figured I'd commit the detection code as a variant of the recursion
implementation, since I think this is correct, and it was a bit tricky
for me to get it right.
2018-06-17 17:35:34 -04:00
James Shubin
c62b8a5d4f lang: Add class and include statements
This adds support for the class definition statement and the include
statement which produces the output from the corresponding class.

The classes in this language support optional input parameters.

In contrast with other tools, the class is *not* a singleton, although
it can be used as one. Using include with equivalent input parameters
will cause the class to act as a singleton, although it can also be used
to produce distinct output.

The output produced by including a class is actually a list of
statements (a prog) which is ultimately a list of resources and edges.
This is different from functions which produces values.
2018-06-17 17:29:44 -04:00
James Shubin
83dab30ecf lang: Simplify bind stmt collection in the prog stmt
This cleans up the code to be more consistent with the other
improvements in this area.
2018-06-12 17:44:42 -04:00
James Shubin
70ccb3022a lang: Simplify struct interpolation
Cleaner code, nothing fancy.
2018-06-12 17:40:57 -04:00
James Shubin
6e20e48489 lang: Simplify graph function for edge half in parser 2018-06-12 17:40:18 -04:00
James Shubin
e25d499eeb lang: Add edges to StmtProg output
I think I forgot to add these previously, and I think they should be
part of the output now.
2018-06-12 17:40:18 -04:00
James Shubin
9969286224 engine: Resources package rewrite
This giant patch makes some much needed improvements to the code base.

* The engine has been rewritten and lives within engine/graph/
* All of the common interfaces and code now live in engine/
* All of the resources are in one package called engine/resources/
* The Res API can use different "traits" from engine/traits/
* The Res API has been simplified to hide many of the old internals
* The Watch & Process loops were previously inverted, but is now fixed
* The likelihood of package cycles has been reduced drastically
* And much, much more...

Unfortunately, some code had to be temporarily removed. The remote code
had to be taken out, as did the prometheus code. We hope to have these
back in new forms as soon as possible.
2018-04-19 01:10:58 -04:00
James Shubin
3ad7097c8a lang: Add internal, resource specific edges
This adds the ability to specify internal, resource specific edges, with
and without notifications. We use the special words: "Notify", "Before",
"Listen", and "Depend". They must have the first character capitalized.
They also support the "elvis" operator.
2018-02-27 23:26:25 -05:00
James Shubin
8e01b6db48 lang: Add a resource-specific elvis operator
This allows you to omit a resource parameter programmatically, and
avoids the need of an `undef` or `nil` in our language, which would
contribute to programming errors, crashes, and overall reduced safety.
2018-02-27 17:29:49 -05:00
James Shubin
6370f0cb95 lang: Add edges to lexer and parser
This adds some initial syntax for external edges to the language.

There are still improvements which are necessary for send/recv.
2018-02-25 19:29:27 -05:00
James Shubin
714afe35a1 test: Fix broken gometalinter test
The test for gometalinter got silently broken in an earlier commit.
Look for the missing space that was added back in this commit to see
why! In any case, this now fixes some of the things that weren't
previously caught by this change.

If anyone knows how to run these sorts of tests properly so that entire
packages are tested and so that we can enable additional tests, please
let me know!

It's also unclear why goreportcard catches a few additional problems
which aren't found by running this ourselves.

See:
https://goreportcard.com/report/github.com/purpleidea/mgmt
for more information.
2018-02-14 14:34:36 -05:00
James Shubin
b19583e7d3 lang: Initial implementation of the mgmt language
This is an initial implementation of the mgmt language. It is a
declarative (immutable) functional, reactive, domain specific
programming language. It is intended to be a language that is:

* safe
* powerful
* easy to reason about

With these properties, we hope this language, and the mgmt engine will
allow you to model the real-time systems that you'd like to automate.

This also includes a number of other associated changes. Sorry for the
large size of this patch.
2018-01-20 08:09:29 -05:00