tree b7eee9886a75e4f03f10a27f16b31f700a696885
parent 99f65912e94b535dbcba46fccad8d80cb2c867ff
author Chad Horohoe <chadh@wikimedia.org> 1519366728 -0800
committer Chad Horohoe <chadh@wikimedia.org> 1519367261 -0800

Abstract external_plugin_deps() one level

This allows core plugins to be extended more easily. Right now, to add
additional core plugins one must copy the dependencies one level. This
is error prone and requires manual changes to the core's
external_plugin_deps.bzl when a plugin's dependencies changes. Instead,
this allows our core external_plugin_deps.bzl to become:

```
load(":gitiles/external_plugin_deps.bzl", "gitiles")

def external_plugin_deps():
  gitiles()
```

And repeat as needed for any additional core plugins we want to add.
Ideally we'd generate these automagically from `tools/bzl/plugins.bzl`
but this is a step in the right direction to that.

Change-Id: I70b99a83c1b382a082eeddf73017239ba1a29ab5