This is needed as normal chromium checkouts don't fetch
branch-heads.
These branches will also be replicated by GitHub and are
fetched when cloning from the repository.
The expected object size will be the same or smaller than
before as we currently push the same information onto the
candidates branch (which already is in refs/heads). The only
difference is the increasing number of refs in refs/heads.
BUG=chromium:451975
TBR=tandrii@chromium.org
NOTRY=true
LOG=n
TEST=./script_test.py
TEST=tools/release/create_release.py -r machenbach@chromium.org -a machenbach@chromium.org --dry-run
Review URL: https://codereview.chromium.org/914973002
Cr-Commit-Position: refs/heads/master@{#26629}
Also create new v8 versions based on the roll ref, which
has some more verification steps than the candidate ref.
Improve bailout regarding existing versions. Only create a
new version if the revisions is in the future.
BUG=chromium:451975
TBR=tandrii@chromium.org
NOTRY=true
LOG=n
Review URL: https://codereview.chromium.org/878913002
Cr-Commit-Position: refs/heads/master@{#26303}
Moved and renamed the scripts to fit with git.
These changes require documentation updates, updates of
the release spreadsheet and the buildbot side.
BUG=chromium:451975
TBR=tandrii@chromium.org
NOTRY=true
LOG=n
Review URL: https://codereview.chromium.org/868473004
Cr-Commit-Position: refs/heads/master@{#26271}
