support for building a .phar command line utility from project sources

[1ma]

Utility tools similar to codeclimate/php-test-reporter can usually be downloaded and used as a standalone .phar package. These binaries can be useful because importing the tool into your project's composer.json might unnecessarily restrict which dependencies you can use (see issue #31), plus there's the side benefit of taking pressure off Composer's package resolving process when you do a composer update.

With that in mind I've ported the satooshi/php-coveralls box.json file into the project. These are the steps to produce one such phar:

$ cd php-test-reporter
$ curl -LSs https://box-project.github.io/box2/installer.php | php
$ composer install --no-dev
$ ./box.phar build

And here is an example of how it might be used in a .travis.yml file.

If you were to accept this PR maybe you could distribute from now on a .phar file in the Releases page, just as Satooshi does with php-coveralls.

So, there's that. Have a nice day :)

[dblandin]

Hey @1ma,

Thank you for the PR! I like this approach and agree that phar archives would be a useful asset.

Here's what came out of the build process locally: codeclimate-test-reporter.phar.zip.

Would you mind updating the build product to codeclimate-test-reporter.phar? Then I'd be happy to merge this PR.

Thanks!

[1ma]

Sure, there you go.

[dblandin]

@1ma Thanks! 👍