Add 'depfile' option to actions.

Add 'depfile' option to actions.

This adds a 'depfile' option to GYP actions, which allows an action to
provide that 'depfile' for use by ninja.

This is necessary for handling dependencies correctly when an action
compiles generated code.

BUG=https://code.google.com/p/chromium/issues/detail?id=440451
R=bradnelson@google.com

Committed: https://code.google.com/p/gyp/source/detail?r=2024

[bradn, 2015-01-03 21:34:41]

bradnelson@google.com changed reviewers:
+ bradnelson@google.com

[bradn, 2015-01-03 21:34:42]

A gyp system test would definitely be a good idea here.
There's a test suite in the gyp repo. Adding a test with the appropriate name
should will drag it in.

[teravest, 2015-01-14 21:18:58]

I've added a gyp test, though it just makes sure that the right "depfile = ..."
line appears in the output ninja file.

[bradn, 2015-01-15 01:07:07]

lgtm

https://codereview.chromium.org/793153004/diff/20001/test/actions-depfile/dep...
File test/actions-depfile/depfile.gyp (right):

https://codereview.chromium.org/793153004/diff/20001/test/actions-depfile/dep...
test/actions-depfile/depfile.gyp:1: # Copyright (c) 2014 Google Inc. All rights
reserved.
2015

https://codereview.chromium.org/793153004/diff/20001/test/actions-depfile/dep...
test/actions-depfile/depfile.gyp:26: 
Drop trailing newline

[teravest, 2015-01-15 15:36:54]

https://codereview.chromium.org/793153004/diff/20001/test/actions-depfile/dep...
File test/actions-depfile/depfile.gyp (right):

https://codereview.chromium.org/793153004/diff/20001/test/actions-depfile/dep...
test/actions-depfile/depfile.gyp:1: # Copyright (c) 2014 Google Inc. All rights
reserved.
On 2015/01/15 01:07:07, bradn wrote:
> 2015

Done.

https://codereview.chromium.org/793153004/diff/20001/test/actions-depfile/dep...
test/actions-depfile/depfile.gyp:26: 
On 2015/01/15 01:07:07, bradn wrote:
> Drop trailing newline

Done.

[teravest, 2015-01-15 16:10:43]

The CQ bit was checked by teravest@chromium.org

[commit-bot: I haz the power, 2015-01-15 16:12:48]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-01-15 16:12:49]

Commit queue rejected this change because it did not recognize the base URL.
Please commit your change manually.

[teravest, 2015-01-15 16:33:33]

Brad, can you grant me committer status in the gyp project? (Or, alternately,
commit this one yourself?)

[teravest, 2015-01-16 16:04:46]

Committed patchset #3 (id:40001) manually as 2024 (presubmit successful).