Use glob expression as file dependency

[Elberet]

I'm using broccoli-babel-transpiler with a bunch of custom Babel plugins. Among other things, these include a wildcard module resolver to allow for things such as import "tests/**/*.spec" - in other words, my source file depends on a glob expression, not a single file. When a new test is added to the project, or when a test file is removed, the source file containing the wildcard import (presumably /alltests.js or similar) needs to be rebuilt.

Can I achieve this with the current dependencyInvalidation mechanism?

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On first reading of the code, I don't believe the current implementation can do this, but a fix should be fairly simple. Storing glob-like dependencies in a separate inverse-map and matching changes against each registered pattern after the regular dependent lookup should be sufficient.

Is this something you would be interested in?

[chriseppstein]

I wrote the dependency invalidation feature. I think this would be a good feature to add. I'm happy to review your PR if you still want to make one up.