[release-tools] Only read from the chromium checkout in v8rel.

[release-tools] Only read from the chromium checkout in v8rel.

Don't create local branches or otherwise manipulate the
checkout. This reads refs from remote branches and
reads file contents using show. It is faster and requires
less bootstrapping and cleanup.

TBR=tandrii@chromium.org
NOTRY=true

Committed: https://crrev.com/3449e4f833590fd6f1548be53be8c1b84e187942
Cr-Commit-Position: refs/heads/master@{#27640}

[Michael Achenbach, 2015-04-07 14:17:07]

machenbach@chromium.org changed reviewers:
+ hablich@chromium.org, tandrii@chromium.org

[Michael Achenbach, 2015-04-07 14:21:15]

PTAL

https://codereview.chromium.org/1060013003/diff/1/tools/release/releases.py
File tools/release/releases.py (right):

https://codereview.chromium.org/1060013003/diff/1/tools/release/releases.py#n...
tools/release/releases.py:363: if count_past_last_v8 > 20:
10 was a bit too small... missed exactly one commit in this cycles branch mess.

[tandrii(chromium), 2015-04-07 15:13:51]

lgtm

https://codereview.chromium.org/1060013003/diff/1/tools/release/git_recipes.py
File tools/release/git_recipes.py (right):

https://codereview.chromium.org/1060013003/diff/1/tools/release/git_recipes.p...
tools/release/git_recipes.py:183: args.extend(["--", path])
nice!

https://codereview.chromium.org/1060013003/diff/1/tools/release/releases.py
File tools/release/releases.py (right):

https://codereview.chromium.org/1060013003/diff/1/tools/release/releases.py#n...
tools/release/releases.py:494: RietrieveChromiumBranches,
unrelated CL nit: /s/RietrieveChromiumBranches/RetrieveChromiumBranches

[Michael Achenbach, 2015-04-07 19:41:48]

https://codereview.chromium.org/1060013003/diff/1/tools/release/releases.py
File tools/release/releases.py (right):

https://codereview.chromium.org/1060013003/diff/1/tools/release/releases.py#n...
tools/release/releases.py:494: RietrieveChromiumBranches,
On 2015/04/07 15:13:51, tandrii(chromium) wrote:
> unrelated CL nit: /s/RietrieveChromiumBranches/RetrieveChromiumBranches

Yea - looks like Rietveld :) - but I'll hit the CQ as I'm not on my comp and
this also fixes a bug. Will take care of that nit in the next CL...

[Michael Achenbach, 2015-04-07 19:42:04]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-04-07 19:42:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1060013003/1

[commit-bot: I haz the power, 2015-04-07 19:42:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-07 19:42:49]

Patchset 1 (id:??) landed as
https://crrev.com/3449e4f833590fd6f1548be53be8c1b84e187942
Cr-Commit-Position: refs/heads/master@{#27640}