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#!/usr/bin/python
# Copyright (c) 2009 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.

"""Top-level presubmit script for Chromium.

See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
for details on the presubmit API built into gcl.
"""

EXCLUDED_PATHS = (
    r"breakpad[\\\/].*",
    r"skia[\\\/].*",
    r"v8[\\\/].*",
)


def CheckChangeOnUpload(input_api, output_api):
  results = []
  # What does this code do?
  # It loads the default black list (e.g. third_party, experimental, etc) and
  # add our black list (breakpad, skia and v8 are still not following
  # google style and are not really living this repository).
  # See presubmit_support.py InputApi.FilterSourceFile for the (simple) usage.
  black_list = input_api.DEFAULT_BLACK_LIST + EXCLUDED_PATHS
  sources = lambda x: input_api.FilterSourceFile(x, black_list=black_list)
  results.extend(input_api.canned_checks.CheckLongLines(
      input_api, output_api, sources))
  results.extend(input_api.canned_checks.CheckChangeHasNoTabs(
      input_api, output_api, sources))
  results.extend(input_api.canned_checks.CheckChangeHasNoStrayWhitespace(
      input_api, output_api, sources))
  results.extend(input_api.canned_checks.CheckChangeHasBugField(
      input_api, output_api))
  results.extend(input_api.canned_checks.CheckChangeHasTestField(
      input_api, output_api))
  results.extend(input_api.canned_checks.CheckChangeSvnEolStyle(
      input_api, output_api, sources))
  results.extend(input_api.canned_checks.CheckSvnForCommonMimeTypes(
      input_api, output_api))
  return results


def CheckChangeOnCommit(input_api, output_api):
  results = []
  black_list = input_api.DEFAULT_BLACK_LIST + EXCLUDED_PATHS
  sources = lambda x: input_api.FilterSourceFile(x, black_list=black_list)
  results.extend(input_api.canned_checks.CheckLongLines(
      input_api, output_api, sources))
  results.extend(input_api.canned_checks.CheckChangeHasNoTabs(
      input_api, output_api, sources))
  results.extend(input_api.canned_checks.CheckChangeHasNoStrayWhitespace(
      input_api, output_api, sources))
  results.extend(input_api.canned_checks.CheckChangeHasBugField(
      input_api, output_api))
  results.extend(input_api.canned_checks.CheckChangeHasTestField(
      input_api, output_api))
  results.extend(input_api.canned_checks.CheckChangeSvnEolStyle(
      input_api, output_api, sources))
  results.extend(input_api.canned_checks.CheckSvnForCommonMimeTypes(
      input_api, output_api))
  results.extend(input_api.canned_checks.CheckSvnModifiedDirectories(
      input_api, output_api, sources))
  # Make sure the tree is 'open'.
  # TODO(maruel): Run it in a separate thread to parallelize checks?
  results.extend(CheckTreeIsOpen(
      input_api,
      output_api,
      'http://chromium-status.appspot.com/status',
      '0',
      'http://chromium-status.appspot.com/current?format=raw'))
  results.extend(CheckTryJobExecution(input_api, output_api))
  return results


def CheckTryJobExecution(input_api, output_api):
  outputs = []
  if not input_api.change.issue or not input_api.change.patchset:
    return outputs
  url = "http://codereview.chromium.org/%d/get_build_results/%d" % (
            input_api.change.issue, input_api.change.patchset)
  PLATFORMS = ('win', 'linux', 'mac')
  try:
    connection = input_api.urllib2.urlopen(url)
    # platform|status|url
    values = [item.split('|', 2) for item in connection.read().splitlines()]
    connection.close()
    # Reformat as an dict of platform: [status, url]
    values = dict([[v[0], [v[1], v[2]]] for v in values])
    for platform in PLATFORMS:
      values.setdefault(platform, ['not started', ''])
    message = None
    non_success = [k.upper() for k,v in values.iteritems() if v[0] != 'success']
    if 'failure' in [v[0] for v in values.itervalues()]:
      message = 'Try job failures on %s!\n' % ', '.join(non_success)
    elif non_success:
      message = ('Unfinished (or not even started) try jobs on '
                 '%s.\n') % ', '.join(non_success)
    if message:
      message += (
          'Is try server wrong or broken? Please notify maruel@chromium.org. '
          'Thanks.\n')
      outputs.append(output_api.PresubmitPromptWarning(message=message))
  except input_api.urllib2.HTTPError, e:
    if e.code == 404:
      # Fallback to no try job.
      # TODO(maruel): Change to a PresubmitPromptWarning once the try server is
      # stable enough and it seems to work fine.
      outputs.append(output_api.PresubmitNotifyResult(
          'You should try the patch first.'))
    else:
      # Another HTTP error happened, warn the user.
      # TODO(maruel): Change to a PresubmitPromptWarning once it deemed to work
      # fine.
      outputs.append(output_api.PresubmitNotifyResult(
          'Got %s while looking for try job status.' % str(e)))
  return outputs


def CheckTreeIsOpen(input_api, output_api, url, closed, url_text):
  """Similar to the one in presubmit_canned_checks except it shows an helpful
  status text instead.
  """
  assert(input_api.is_committing)
  try:
    connection = input_api.urllib2.urlopen(url)
    status = connection.read()
    connection.close()
    if input_api.re.match(closed, status):
      long_text = status + '\n' + url
      try:
        connection = input_api.urllib2.urlopen(url_text)
        long_text = connection.read().strip()
        connection.close()
      except IOError:
        pass
      return [output_api.PresubmitError("The tree is closed.",
                                        long_text=long_text)]
  except IOError:
    pass
  return []