text: # Copyright (c) 2011 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.
  
  """Presubmit script for changes affecting chrome/
  
  See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
  for more details about the presubmit API built into depot_tools.
  """
  
  import re
  
  INCLUDE_CPP_FILES_ONLY = (
    r'.*\.(cc|h)$',
  )
  
  INCLUDE_SOURCE_FILES_ONLY = (
    r'.*\.(c|cc|cpp|h|m|mm)$',
  )
  
  EXCLUDE = (
    # Objective C confuses everything.
    r'.*cocoa.*',
    r'.*_mac\.(cc|h)$',
    r'.*_mac_.*',
    # All the messages files do weird multiple include trickery
    r'.*_messages.*\.h$',
    r'render_messages.h$',
    # Autogenerated window resources files are off limits
    r'.*resource.h$',
    # Header trickery
    r'.*-inl\.h$',
    # Has safe printf usage that cpplint complains about
    r'safe_browsing_util\.cc$',
  )
  
  def _CheckChangeLintsClean(input_api, output_api):
    """Makes sure that the chrome/ code is cpplint clean."""
    files_to_skip = input_api.DEFAULT_FILES_TO_SKIP + EXCLUDE
    sources = lambda x: input_api.FilterSourceFile(
      x, files_to_check=INCLUDE_CPP_FILES_ONLY, files_to_skip=files_to_skip)
    return input_api.canned_checks.CheckChangeLintsClean(
        input_api, output_api, sources)
  
  
  def _CheckNoContentUnitTestsInChrome(input_api, output_api):
    """Makes sure that no unit tests from content/ are included in unit_tests."""
    problems = []
    for f in input_api.AffectedFiles():
      if not f.LocalPath().endswith('BUILD.gn'):
        continue
  
      for line_num, line in f.ChangedContents():
        m = re.search(r"'(.*\/content\/.*unittest.*)'", line)
        if m:
          problems.append(m.group(1))
  
    if not problems:
      return []
    return [output_api.PresubmitPromptWarning(
        'Unit tests located in content/ should be added to the ' +
        'content_unittests target.',
        items=problems)]
  
  
  def _CheckNoOSIOSMacrosInChromeFile(input_api, f):
    """Check for OS_IOS in a given file in chrome/."""
    preprocessor_statement = input_api.re.compile(r'^\s*#')
    ios_macro = input_api.re.compile(r'defined\(OS_IOS\)')
    results = []
    for lnum, line in f.ChangedContents():
      if preprocessor_statement.search(line) and ios_macro.search(line):
        results.append('    %s:%d' % (f.LocalPath(), lnum))
  
    return results
  
  
  def _CheckNoOSIOSMacrosInChrome(input_api, output_api):
    """Check for OS_IOS which isn't used in chrome/."""
    ios_macros = []
    def SourceFilter(affected_file):
      return input_api.FilterSourceFile(affected_file, INCLUDE_SOURCE_FILES_ONLY,
                                        input_api.DEFAULT_FILES_TO_SKIP)
    for f in input_api.AffectedSourceFiles(SourceFilter):
      ios_macros.extend(_CheckNoOSIOSMacrosInChromeFile(input_api, f))
  
    if not ios_macros:
      return []
  
    return [output_api.PresubmitError(
        'OS_IOS is not used in chrome/ but found in:\n', ios_macros)]
  
  
  def _CommonChecks(input_api, output_api):
    """Checks common to both upload and commit."""
    results = []
    results.extend(_CheckNoContentUnitTestsInChrome(input_api, output_api))
    results.extend(_CheckNoOSIOSMacrosInChrome(input_api, output_api))
    return results
  
  
  def CheckChangeOnUpload(input_api, output_api):
    results = []
    results.extend(_CommonChecks(input_api, output_api))
    results.extend(_CheckChangeLintsClean(input_api, output_api))
    return results
  
  
  def CheckChangeOnCommit(input_api, output_api):
    results = []
    results.extend(_CommonChecks(input_api, output_api))
    return results
  