commit 3f8f4c3a85cc3952c74ee274f868e716e6a973ad
author Michael Bolin <mbolin@fb.com> Mon Sep 16 18:12:43 2013 -0700
committer Michael Bolin <mbolin@fb.com> Thu Sep 19 15:25:03 2013 -0700
tree 69537e6398cf4550aa0c0a138332597b319cb0d4
parent ff4723894d96eb458f072fe3850262c83a25c5f8

Introduce preprocess_java_classes_bash option to android_binary.

Summary:
This introduces a new pair of options to `android_binary`:
`preprocess_java_classes_deps` and `preprocess_java_classes_bash`.
Together, these options give the developer the opportunity to
pre-process the `.class` files for the APK before they are fed into ProGuard.

`preprocess_java_classes_bash` is a `genrule`-like `bash` argument that must contain
the strings `$IN_JARS_DIR` and `$OUT_JARS_DIR`. Just like in a `genrule`,
`preprocess_java_classes_bash` may contain `$(exe //build:target)` or
`$(location //build:target)` expressions so long as the target is listed in
`preprocess_java_classes_deps`. (This also ensures that any such targets are
built before the `android_binary` rule itself.)

The contract is that the executable must write out the contents of
`$OUT_JARS_DIR` so that the file structure matches that of `$IN_JARS_DIR`
exactly.

Test Plan:
Sandcastle builds.