git cl: add python implementation of Change-Id generation.
This allows to generate new IDs on the fly without installing
commit-msg hook and works just fine on Windows.
BUG=579183
Review URL: https://codereview.chromium.org/1757133002
git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@299094 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/git_cl.py b/git_cl.py
index d1802cc..8f71fd5 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -2148,6 +2148,36 @@
print >> sys.stderr, 'ERROR: Gerrit commit-msg hook not available.'
+def GenerateGerritChangeId(message):
+ """Returns Ixxxxxx...xxx change id.
+
+ Works the same way as
+ https://gerrit-review.googlesource.com/tools/hooks/commit-msg
+ but can be called on demand on all platforms.
+
+ The basic idea is to generate git hash of a state of the tree, original commit
+ message, author/committer info and timestamps.
+ """
+ lines = []
+ tree_hash = RunGitSilent(['write-tree'])
+ lines.append('tree %s' % tree_hash.strip())
+ code, parent = RunGitWithCode(['rev-parse', 'HEAD~0'], suppress_stderr=False)
+ if code == 0:
+ lines.append('parent %s' % parent.strip())
+ author = RunGitSilent(['var', 'GIT_AUTHOR_IDENT'])
+ lines.append('author %s' % author.strip())
+ committer = RunGitSilent(['var', 'GIT_COMMITTER_IDENT'])
+ lines.append('committer %s' % committer.strip())
+ lines.append('')
+ # Note: Gerrit's commit-hook actually cleans message of some lines and
+ # whitespace. This code is not doing this, but it clearly won't decrease
+ # entropy.
+ lines.append(message)
+ change_hash = RunCommand(['git', 'hash-object', '-t', 'commit', '--stdin'],
+ stdin='\n'.join(lines))
+ return 'I%s' % change_hash.strip()
+
+
def GerritUpload(options, args, cl, change):
"""upload the current branch to gerrit."""
# We assume the remote called "origin" is the one we want.