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132 lines
3.9 KiB
Python
132 lines
3.9 KiB
Python
#!/usr/bin/env python
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# Copyright (c) 2011 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Watchlists
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Watchlists is a mechanism that allow a developer (a "watcher") to watch over
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portions of code that he is interested in. A "watcher" will be cc-ed to
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changes that modify that portion of code, thereby giving him an opportunity
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to make comments on codereview.chromium.org even before the change is
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committed.
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Refer: http://dev.chromium.org/developers/contributing-code/watchlists
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When invoked directly from the base of a repository, this script lists out
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the watchers for files given on the command line. This is useful to verify
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changes to WATCHLISTS files.
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"""
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import logging
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import os
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import re
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import sys
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class Watchlists(object):
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"""Manage Watchlists.
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This class provides mechanism to load watchlists for a repo and identify
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watchers.
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Usage:
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wl = Watchlists("/path/to/repo/root")
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watchers = wl.GetWatchersForPaths(["/path/to/file1",
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"/path/to/file2",])
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"""
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_RULES = "WATCHLISTS"
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_RULES_FILENAME = _RULES
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_repo_root = None
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_defns = {} # Definitions
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_watchlists = {} # name to email mapping
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def __init__(self, repo_root):
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self._repo_root = repo_root
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self._LoadWatchlistRules()
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def _GetRulesFilePath(self):
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"""Returns path to WATCHLISTS file."""
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return os.path.join(self._repo_root, self._RULES_FILENAME)
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def _HasWatchlistsFile(self):
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"""Determine if watchlists are available for this repo."""
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return os.path.exists(self._GetRulesFilePath())
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def _ContentsOfWatchlistsFile(self):
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"""Read the WATCHLISTS file and return its contents."""
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try:
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watchlists_file = open(self._GetRulesFilePath())
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contents = watchlists_file.read()
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watchlists_file.close()
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return contents
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except IOError, e:
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logging.error("Cannot read %s: %s" % (self._GetRulesFilePath(), e))
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return ''
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def _LoadWatchlistRules(self):
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"""Load watchlists from WATCHLISTS file. Does nothing if not present."""
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if not self._HasWatchlistsFile():
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return
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contents = self._ContentsOfWatchlistsFile()
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watchlists_data = None
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try:
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watchlists_data = eval(contents, {'__builtins__': None}, None)
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except SyntaxError, e:
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logging.error("Cannot parse %s. %s" % (self._GetRulesFilePath(), e))
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return
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defns = watchlists_data.get("WATCHLIST_DEFINITIONS")
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if not defns:
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logging.error("WATCHLIST_DEFINITIONS not defined in %s" %
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self._GetRulesFilePath())
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return
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watchlists = watchlists_data.get("WATCHLISTS")
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if not watchlists:
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logging.error("WATCHLISTS not defined in %s" % self._GetRulesFilePath())
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return
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self._defns = defns
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self._watchlists = watchlists
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# Verify that all watchlist names are defined
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for name in watchlists:
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if name not in defns:
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logging.error("%s not defined in %s" % (name, self._GetRulesFilePath()))
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def GetWatchersForPaths(self, paths):
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"""Fetch the list of watchers for |paths|
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Args:
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paths: [path1, path2, ...]
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Returns:
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[u1@chromium.org, u2@gmail.com, ...]
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"""
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watchers = set() # A set, to avoid duplicates
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for path in paths:
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path = path.replace(os.sep, '/')
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for name, rule in self._defns.iteritems():
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if name not in self._watchlists:
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continue
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rex_str = rule.get('filepath')
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if not rex_str:
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continue
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if re.search(rex_str, path):
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map(watchers.add, self._watchlists[name])
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return list(watchers)
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def main(argv):
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# Confirm that watchlists can be parsed and spew out the watchers
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if len(argv) < 2:
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print "Usage (from the base of repo):"
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print " %s [file-1] [file-2] ...." % argv[0]
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return 1
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wl = Watchlists(os.getcwd())
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watchers = wl.GetWatchersForPaths(argv[1:])
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print watchers
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if __name__ == '__main__':
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main(sys.argv)
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