[Culprit-Finder] Merge lib/ to libs/.

appengine/findit/lib/gitiles/commit_util.py

-# Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import re
-
-CODE_REVIEW_URL_PATTERN = re.compile(
-    '^(?:Review URL|Review-Url): (.*\d+).*$', re.IGNORECASE)
-COMMIT_POSITION_PATTERN = re.compile(
-    '^Cr-Commit-Position: refs/heads/master@{#(\d+)}$', re.IGNORECASE)
-REVERTED_REVISION_PATTERN = re.compile(
-    '^> Committed: https://.+/([0-9a-fA-F]{40})$', re.IGNORECASE)
-START_OF_CR_COMMIT_POSITION = -5
-
-
-def ExtractCommitPositionAndCodeReviewUrl(message):
-  """Returns the commit position and code review url in the commit message.
-
-  A "commit position" is something similar to SVN version ids; i.e.,
-  numeric identifiers which are issued in sequential order. The reason
-  we care about them is that they're easier for humans to read than
-  the hashes that Git uses internally for identifying commits. We
-  should never actually use them for *identifying* commits; they're
-  only for pretty printing to humans.
-
-  Returns:
-    (commit_position, code_review_url)
-  """
-  if not message:
-    return (None, None)
-
-  commit_position = None
-  code_review_url = None
-
-  # Commit position and code review url are in the last 5 lines.
-  lines = message.strip().split('\n')[START_OF_CR_COMMIT_POSITION:]
-  lines.reverse()
-
-  for line in lines:
-    if commit_position is None:
-      match = COMMIT_POSITION_PATTERN.match(line)
-      if match:
-        commit_position = int(match.group(1))
-
-    if code_review_url is None:
-      match = CODE_REVIEW_URL_PATTERN.match(line)
-      if match:
-        code_review_url = match.group(1)
-  return (commit_position, code_review_url)
-
-
-def NormalizeEmail(email):
-  """Normalizes the email from git repo.
-
-  Some email is like: test@chromium.org@bbb929c8-8fbe-4397-9dbb-9b2b20218538.
-  """
-  parts = email.split('@')
-  return '@'.join(parts[0:2])
-
-
-def GetRevertedRevision(message):
-  """Parse message to get the reverted revision if there is one."""
-  lines = message.strip().splitlines()
-  if not lines[0].lower().startswith('revert'):
-    return None
-
-  for line in reversed(lines):  # pragma: no cover
-    # TODO: Handle cases where no reverted_revision in reverting message.
-    reverted_revision_match = REVERTED_REVISION_PATTERN.match(line)
-    if reverted_revision_match:
-      return reverted_revision_match.group(1)