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- #!/usr/bin/env python
- #
- # Copyright 2019 Google Inc.
- #
- # Use of this source code is governed by a BSD-style license that can be
- # found in the LICENSE file.
- import os
- import re
- import subprocess
- import sys
- from infra import git
- from infra import go
- _TOOLS_DIR = os.path.dirname(os.path.abspath(__file__))
- _REPO_ROOT = os.path.realpath(os.path.join(_TOOLS_DIR, os.pardir))
- _INFRA_BOTS = os.path.join(_REPO_ROOT, 'infra', 'bots')
- sys.path.insert(0, _INFRA_BOTS)
- import git_utils
- REFS_HEADS_PREFIX = 'refs/heads/'
- CHROME_REF_PREFIX = REFS_HEADS_PREFIX + 'chrome/m'
- SK_MILESTONE_H = os.path.join('include', 'core', 'SkMilestone.h')
- SK_MILESTONE_TMPL = r'#define SK_MILESTONE %s'
- SK_MILESTONE_RE = SK_MILESTONE_TMPL % r'(\d+)'
- SKIA_REPO = 'https://skia.googlesource.com/skia.git'
- SUPPORTED_CHROME_BRANCHES = 2 # Per infra policy; see skbug.com/8940
- UPDATE_MILESTONE_COMMIT_MSG = '''Update Skia milestone to %d'''
- def get_current_milestone():
- '''Read SkMilestone.h and parse out the current milestone.'''
- sk_milestone = os.path.join(_REPO_ROOT, SK_MILESTONE_H)
- with open(sk_milestone, 'r') as f:
- contents = f.read()
- for line in contents.splitlines():
- m = re.match(SK_MILESTONE_RE, line)
- if m:
- return int(m.groups()[0])
- print >> sys.stderr, (
- 'Failed to parse %s; has the format changed?' % SK_MILESTONE_H)
- sys.exit(1)
- def create_new_branch(new_branch, branch_at):
- '''Create a temporary checkout of the repo, create the new branch and push.'''
- b = new_branch[len(REFS_HEADS_PREFIX):]
- with git_utils.NewGitCheckout(SKIA_REPO, local=_REPO_ROOT):
- git.git('checkout', '-b', b)
- git.git('reset', '--hard', branch_at)
- git.git('push', '--set-upstream', 'origin', b)
- def update_milestone(m):
- '''Update SkMilestone.h to match the given milestone number.'''
- with git_utils.NewGitCheckout(SKIA_REPO, local=_REPO_ROOT):
- with git_utils.GitBranch(
- 'update_milestone', UPDATE_MILESTONE_COMMIT_MSG % m):
- with open(SK_MILESTONE_H, 'r+') as f:
- contents = re.sub(
- SK_MILESTONE_RE, SK_MILESTONE_TMPL % str(m), f.read(), flags=re.M)
- f.seek(0)
- f.write(contents)
- f.truncate()
- git.git('diff')
- def update_infra_config(old_branch, new_branch):
- '''Create a CL to add infra support for the new branch and remove the old.'''
- owner = git.git('config', 'user.email').rstrip()
- if not owner:
- print >> sys.stderr, ('No configured git user; please run '
- '"git config user.email <your email>".')
- sys.exit(1)
- go.get(go.INFRA_GO+'/go/supported_branches/cmd/new-branch')
- subprocess.check_call(['new-branch',
- '--branch', new_branch[len(REFS_HEADS_PREFIX):],
- '--delete', old_branch[len(REFS_HEADS_PREFIX):],
- '--owner', owner,
- '--exclude-trybots=chromium.*',
- '--exclude-trybots=.*Android_Framework.*'])
- def main():
- if len(sys.argv) != 2 or '--help' in sys.argv or '-h' in sys.argv:
- print >> sys.stderr, 'Usage: %s <commit hash for branch>' % sys.argv[0]
- sys.exit(1)
- go.check()
- branch_at = sys.argv[1]
- m = get_current_milestone()
- new_branch = '%s%d' % (CHROME_REF_PREFIX, m)
- old_branch = '%s%d' % (CHROME_REF_PREFIX, m-SUPPORTED_CHROME_BRANCHES)
- print 'Creating branch %s and removing support (eg. CQ) for %s' % (
- new_branch, old_branch)
- create_new_branch(new_branch, branch_at)
- update_milestone(m+1)
- update_infra_config(old_branch, new_branch)
- if __name__ == '__main__':
- main()
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