Add git-cl upload hooks....

Add git-cl upload hooks.

Provide git-cl upload and dcommit hooks based on this
single hooks file.  Installed via git-cl config.
Loads and calls the PresubmitSupport library.
Test failure before a dcommit halts the check-in.

BUG=5339
TEST=hooks file runs presubmit checks and halts
checkin (dcommit) or repeats error messages (upload).
hooks file runs and doesn't interrupt process if no
errors present.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=28125

[M-A Ruel, 2009-10-06 15:06:54]

lgtm

[Evan Martin, 2009-10-06 17:06:11]

http://codereview.chromium.org/256075/diff/1/2
File git-cl-upload-hook (right):

http://codereview.chromium.org/256075/diff/1/2#newcode36
Line 36: root = Backquote(['git', 'rev-parse', '--show-cdup']).rstrip()
fwiw, you call strip() above in backquote, so you don't need all of these
rstrips.

[chase, 2009-10-06 17:11:43]

http://codereview.chromium.org/256075/diff/1/2
File git-cl-upload-hook (right):

http://codereview.chromium.org/256075/diff/1/2#newcode36
Line 36: root = Backquote(['git', 'rev-parse', '--show-cdup']).rstrip()
On 2009/10/06 17:06:11, Evan Martin wrote:
> fwiw, you call strip() above in backquote, so you don't need all of these
> rstrips.

Done.