Fix mocha.cmd binary lookup

[blah238]

This line of code was looking for mocha.cmd in Mocha's own bin folder.

This is incorrect; there is no mocha.cmd file there. The mocha.cmd file is in the node_modules/.bin folder.

Tested on Windows. Not sure about *nix.

There is probably a better way to get to the node_modules/.bin folder than this, but it "works for me (tm)".

[knpwrs]

Provided that gulp automatically switches the cwd to the directory of the gulpfile I'll go ahead and merge this. Linking to current CLI documentation for reference: https://github.com/gulpjs/gulp/blob/54197db5fde8138f8e850f9c8ab35f5de0aa0f61/docs/CLI.md

[knpwrs]

Published to npm as 0.1.7-beta.4.

[knpwrs]

So, on the other hand, there is child_process::fork.

We could do the equivalent of the following:

var fork = require('child_process').fork,
    path = require('path');
var args = [/*...*/];
fork(path.join(require.resolve('mocha'), 'bin', '_mocha'), args);

bin/_mocha is a node module which means we could fork it off. It's typically used for code coverage because then libraries like istanbul can inject instrumentation code with no effort required on the developers' part. This should support multiple platforms and make the planned coverage support in #10 a lot easier.

Thoughts?

[blah238]

@KenPowers Worth a try, IMO, so long as all the CLI arguments are supported (the problem with Mocha's programmatic interface is that many of the CLI args aren't supported).

But then you might have to rename this module gulp-fork-mocha 😉

[knpwrs]

I actually thought of that myself, but then I read

This is a special case of the spawn() functionality for spawning Node processes.

So I think we're good. :P

[knpwrs]

Also, it seems like it works as with all flags (such as --debug-brk) as long as fork is called on mocha and not on _mocha. In order for code coverage with istanbul to work we'll need to call _mocha which means arguments like --debug-brk won't work when doing coverage.

[knpwrs]

fork appears to work on a Windows test VM I just set up:

[knpwrs]

Published 0.3.0 to npm with fork.

[scott2449]

I will give it a shot tomorrow, thanks!