PRESUBMIT.py

   1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 """Top-level presubmit script for Chromium.
   6
   7 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
   8 for more details about the presubmit API built into depot_tools.
   9 """
  10
  11
  12 _EXCLUDED_PATHS = (
  13     r"^breakpad[\\\/].*",
  14     r"^native_client_sdk[\\\/]src[\\\/]build_tools[\\\/]make_rules.py",
  15     r"^native_client_sdk[\\\/]src[\\\/]build_tools[\\\/]make_simple.py",
  16     r"^native_client_sdk[\\\/]src[\\\/]tools[\\\/].*.mk",
  17     r"^net[\\\/]tools[\\\/]spdyshark[\\\/].*",
  18     r"^skia[\\\/].*",
  19     r"^v8[\\\/].*",
  20     r".*MakeFile$",
  21     r".+_autogen\.h$",
  22     r".+[\\\/]pnacl_shim\.c$",
  23     r"^gpu[\\\/]config[\\\/].*_list_json\.cc$",
  24     r"^chrome[\\\/]browser[\\\/]resources[\\\/]pdf[\\\/]index.js"
  25 )
  26
  27 # The NetscapePlugIn library is excluded from pan-project as it will soon
  28 # be deleted together with the rest of the NPAPI and it's not worthwhile to
  29 # update the coding style until then.
  30 _TESTRUNNER_PATHS = (
  31     r"^content[\\\/]shell[\\\/]tools[\\\/]plugin[\\\/].*",
  32 )
  33
  34 # Fragment of a regular expression that matches C++ and Objective-C++
  35 # implementation files.
  36 _IMPLEMENTATION_EXTENSIONS = r'\.(cc|cpp|cxx|mm)$'
  37
  38 # Regular expression that matches code only used for test binaries
  39 # (best effort).
  40 _TEST_CODE_EXCLUDED_PATHS = (
  41     r'.*[\\\/](fake_|test_|mock_).+%s' % _IMPLEMENTATION_EXTENSIONS,
  42     r'.+_test_(base|support|util)%s' % _IMPLEMENTATION_EXTENSIONS,
  43     r'.+_(api|browser|kif|perf|pixel|unit|ui)?test(_[a-z]+)?%s' %
  44         _IMPLEMENTATION_EXTENSIONS,
  45     r'.+profile_sync_service_harness%s' % _IMPLEMENTATION_EXTENSIONS,
  46     r'.*[\\\/](test|tool(s)?)[\\\/].*',
  47     # content_shell is used for running layout tests.
  48     r'content[\\\/]shell[\\\/].*',
  49     # At request of folks maintaining this folder.
  50     r'chrome[\\\/]browser[\\\/]automation[\\\/].*',
  51     # Non-production example code.
  52     r'mojo[\\\/]examples[\\\/].*',
  53     # Launcher for running iOS tests on the simulator.
  54     r'testing[\\\/]iossim[\\\/]iossim\.mm$',
  55 )
  56
  57 _TEST_ONLY_WARNING = (
  58     'You might be calling functions intended only for testing from\n'
  59     'production code.  It is OK to ignore this warning if you know what\n'
  60     'you are doing, as the heuristics used to detect the situation are\n'
  61     'not perfect.  The commit queue will not block on this warning.')
  62
  63
  64 _INCLUDE_ORDER_WARNING = (
  65     'Your #include order seems to be broken. Remember to use the right '
  66     'collation (LC_COLLATE=C) and check https://google-styleguide.googlecode'
  67     '.com/svn/trunk/cppguide.html#Names_and_Order_of_Includes')
  68
  69 _BANNED_OBJC_FUNCTIONS = (
  70     (
  71       'addTrackingRect:',
  72       (
  73        'The use of -[NSView addTrackingRect:owner:userData:assumeInside:] is'
  74        'prohibited. Please use CrTrackingArea instead.',
  75        'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
  76       ),
  77       False,
  78     ),
  79     (
  80       r'/NSTrackingArea\W',
  81       (
  82        'The use of NSTrackingAreas is prohibited. Please use CrTrackingArea',
  83        'instead.',
  84        'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
  85       ),
  86       False,
  87     ),
  88     (
  89       'convertPointFromBase:',
  90       (
  91        'The use of -[NSView convertPointFromBase:] is almost certainly wrong.',
  92        'Please use |convertPoint:(point) fromView:nil| instead.',
  93        'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
  94       ),
  95       True,
  96     ),
  97     (
  98       'convertPointToBase:',
  99       (
 100        'The use of -[NSView convertPointToBase:] is almost certainly wrong.',
 101        'Please use |convertPoint:(point) toView:nil| instead.',
 102        'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
 103       ),
 104       True,
 105     ),
 106     (
 107       'convertRectFromBase:',
 108       (
 109        'The use of -[NSView convertRectFromBase:] is almost certainly wrong.',
 110        'Please use |convertRect:(point) fromView:nil| instead.',
 111        'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
 112       ),
 113       True,
 114     ),
 115     (
 116       'convertRectToBase:',
 117       (
 118        'The use of -[NSView convertRectToBase:] is almost certainly wrong.',
 119        'Please use |convertRect:(point) toView:nil| instead.',
 120        'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
 121       ),
 122       True,
 123     ),
 124     (
 125       'convertSizeFromBase:',
 126       (
 127        'The use of -[NSView convertSizeFromBase:] is almost certainly wrong.',
 128        'Please use |convertSize:(point) fromView:nil| instead.',
 129        'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
 130       ),
 131       True,
 132     ),
 133     (
 134       'convertSizeToBase:',
 135       (
 136        'The use of -[NSView convertSizeToBase:] is almost certainly wrong.',
 137        'Please use |convertSize:(point) toView:nil| instead.',
 138        'http://dev.chromium.org/developers/coding-style/cocoa-dos-and-donts',
 139       ),
 140       True,
 141     ),
 142 )
 143
 144
 145 _BANNED_CPP_FUNCTIONS = (
 146     # Make sure that gtest's FRIEND_TEST() macro is not used; the
 147     # FRIEND_TEST_ALL_PREFIXES() macro from base/gtest_prod_util.h should be
 148     # used instead since that allows for FLAKY_ and DISABLED_ prefixes.
 149     (
 150       'FRIEND_TEST(',
 151       (
 152        'Chromium code should not use gtest\'s FRIEND_TEST() macro. Include',
 153        'base/gtest_prod_util.h and use FRIEND_TEST_ALL_PREFIXES() instead.',
 154       ),
 155       False,
 156       (),
 157     ),
 158     (
 159       'ScopedAllowIO',
 160       (
 161        'New code should not use ScopedAllowIO. Post a task to the blocking',
 162        'pool or the FILE thread instead.',
 163       ),
 164       True,
 165       (
 166         r"^base[\\\/]process[\\\/]process_metrics_linux\.cc$",
 167         r"^chrome[\\\/]browser[\\\/]chromeos[\\\/]boot_times_recorder\.cc$",
 168         r"^chrome[\\\/]browser[\\\/]chromeos[\\\/]"
 169             "customization_document_browsertest\.cc$",
 170         r"^components[\\\/]crash[\\\/]app[\\\/]breakpad_mac\.mm$",
 171         r"^content[\\\/]shell[\\\/]browser[\\\/]shell_browser_main\.cc$",
 172         r"^content[\\\/]shell[\\\/]browser[\\\/]shell_message_filter\.cc$",
 173         r"^mojo[\\\/]edk[\\\/]embedder[\\\/]" +
 174             r"simple_platform_shared_buffer_posix\.cc$",
 175         r"^net[\\\/]disk_cache[\\\/]cache_util\.cc$",
 176         r"^net[\\\/]url_request[\\\/]test_url_fetcher_factory\.cc$",
 177         r"^ui[\\\/]ozone[\\\/]platform[\\\/]drm[\\\/]host[\\\/]"
 178             "drm_native_display_delegate\.cc$",
 179       ),
 180     ),
 181     (
 182       'SkRefPtr',
 183       (
 184         'The use of SkRefPtr is prohibited. ',
 185         'Please use skia::RefPtr instead.'
 186       ),
 187       True,
 188       (),
 189     ),
 190     (
 191       'SkAutoRef',
 192       (
 193         'The indirect use of SkRefPtr via SkAutoRef is prohibited. ',
 194         'Please use skia::RefPtr instead.'
 195       ),
 196       True,
 197       (),
 198     ),
 199     (
 200       'SkAutoTUnref',
 201       (
 202         'The use of SkAutoTUnref is dangerous because it implicitly ',
 203         'converts to a raw pointer. Please use skia::RefPtr instead.'
 204       ),
 205       True,
 206       (),
 207     ),
 208     (
 209       'SkAutoUnref',
 210       (
 211         'The indirect use of SkAutoTUnref through SkAutoUnref is dangerous ',
 212         'because it implicitly converts to a raw pointer. ',
 213         'Please use skia::RefPtr instead.'
 214       ),
 215       True,
 216       (),
 217     ),
 218     (
 219       r'/HANDLE_EINTR\(.*close',
 220       (
 221        'HANDLE_EINTR(close) is invalid. If close fails with EINTR, the file',
 222        'descriptor will be closed, and it is incorrect to retry the close.',
 223        'Either call close directly and ignore its return value, or wrap close',
 224        'in IGNORE_EINTR to use its return value. See http://crbug.com/269623'
 225       ),
 226       True,
 227       (),
 228     ),
 229     (
 230       r'/IGNORE_EINTR\((?!.*close)',
 231       (
 232        'IGNORE_EINTR is only valid when wrapping close. To wrap other system',
 233        'calls, use HANDLE_EINTR. See http://crbug.com/269623',
 234       ),
 235       True,
 236       (
 237         # Files that #define IGNORE_EINTR.
 238         r'^base[\\\/]posix[\\\/]eintr_wrapper\.h$',
 239         r'^ppapi[\\\/]tests[\\\/]test_broker\.cc$',
 240       ),
 241     ),
 242     (
 243       r'/v8::Extension\(',
 244       (
 245         'Do not introduce new v8::Extensions into the code base, use',
 246         'gin::Wrappable instead. See http://crbug.com/334679',
 247       ),
 248       True,
 249       (
 250         r'extensions[\\\/]renderer[\\\/]safe_builtins\.*',
 251       ),
 252     ),
 253 )
 254
 255 _IPC_ENUM_TRAITS_DEPRECATED = (
 256     'You are using IPC_ENUM_TRAITS() in your code. It has been deprecated.\n'
 257     'See http://www.chromium.org/Home/chromium-security/education/security-tips-for-ipc')
 258
 259
 260 _VALID_OS_MACROS = (
 261     # Please keep sorted.
 262     'OS_ANDROID',
 263     'OS_ANDROID_HOST',
 264     'OS_BSD',
 265     'OS_CAT',       # For testing.
 266     'OS_CHROMEOS',
 267     'OS_FREEBSD',
 268     'OS_IOS',
 269     'OS_LINUX',
 270     'OS_MACOSX',
 271     'OS_NACL',
 272     'OS_NACL_NONSFI',
 273     'OS_NACL_SFI',
 274     'OS_OPENBSD',
 275     'OS_POSIX',
 276     'OS_QNX',
 277     'OS_SOLARIS',
 278     'OS_WIN',
 279 )
 280
 281
 282 def _CheckNoProductionCodeUsingTestOnlyFunctions(input_api, output_api):
 283   """Attempts to prevent use of functions intended only for testing in
 284   non-testing code. For now this is just a best-effort implementation
 285   that ignores header files and may have some false positives. A
 286   better implementation would probably need a proper C++ parser.
 287   """
 288   # We only scan .cc files and the like, as the declaration of
 289   # for-testing functions in header files are hard to distinguish from
 290   # calls to such functions without a proper C++ parser.
 291   file_inclusion_pattern = r'.+%s' % _IMPLEMENTATION_EXTENSIONS
 292
 293   base_function_pattern = r'[ :]test::[^\s]+|ForTest(ing)?|for_test(ing)?'
 294   inclusion_pattern = input_api.re.compile(r'(%s)\s*\(' % base_function_pattern)
 295   comment_pattern = input_api.re.compile(r'//.*(%s)' % base_function_pattern)
 296   exclusion_pattern = input_api.re.compile(
 297     r'::[A-Za-z0-9_]+(%s)|(%s)[^;]+\{' % (
 298       base_function_pattern, base_function_pattern))
 299
 300   def FilterFile(affected_file):
 301     black_list = (_EXCLUDED_PATHS +
 302                   _TEST_CODE_EXCLUDED_PATHS +
 303                   input_api.DEFAULT_BLACK_LIST)
 304     return input_api.FilterSourceFile(
 305       affected_file,
 306       white_list=(file_inclusion_pattern, ),
 307       black_list=black_list)
 308
 309   problems = []
 310   for f in input_api.AffectedSourceFiles(FilterFile):
 311     local_path = f.LocalPath()
 312     for line_number, line in f.ChangedContents():
 313       if (inclusion_pattern.search(line) and
 314           not comment_pattern.search(line) and
 315           not exclusion_pattern.search(line)):
 316         problems.append(
 317           '%s:%d\n    %s' % (local_path, line_number, line.strip()))
 318
 319   if problems:
 320     return [output_api.PresubmitPromptOrNotify(_TEST_ONLY_WARNING, problems)]
 321   else:
 322     return []
 323
 324
 325 def _CheckNoIOStreamInHeaders(input_api, output_api):
 326   """Checks to make sure no .h files include <iostream>."""
 327   files = []
 328   pattern = input_api.re.compile(r'^#include\s*<iostream>',
 329                                  input_api.re.MULTILINE)
 330   for f in input_api.AffectedSourceFiles(input_api.FilterSourceFile):
 331     if not f.LocalPath().endswith('.h'):
 332       continue
 333     contents = input_api.ReadFile(f)
 334     if pattern.search(contents):
 335       files.append(f)
 336
 337   if len(files):
 338     return [ output_api.PresubmitError(
 339         'Do not #include <iostream> in header files, since it inserts static '
 340         'initialization into every file including the header. Instead, '
 341         '#include <ostream>. See http://crbug.com/94794',
 342         files) ]
 343   return []
 344
 345
 346 def _CheckNoUNIT_TESTInSourceFiles(input_api, output_api):
 347   """Checks to make sure no source files use UNIT_TEST"""
 348   problems = []
 349   for f in input_api.AffectedFiles():
 350     if (not f.LocalPath().endswith(('.cc', '.mm'))):
 351       continue
 352
 353     for line_num, line in f.ChangedContents():
 354       if 'UNIT_TEST ' in line or line.endswith('UNIT_TEST'):
 355         problems.append('    %s:%d' % (f.LocalPath(), line_num))
 356
 357   if not problems:
 358     return []
 359   return [output_api.PresubmitPromptWarning('UNIT_TEST is only for headers.\n' +
 360       '\n'.join(problems))]
 361
 362
 363 def _FindHistogramNameInLine(histogram_name, line):
 364   """Tries to find a histogram name or prefix in a line."""
 365   if not "affected-histogram" in line:
 366     return histogram_name in line
 367   # A histogram_suffixes tag type has an affected-histogram name as a prefix of
 368   # the histogram_name.
 369   if not '"' in line:
 370     return False
 371   histogram_prefix = line.split('\"')[1]
 372   return histogram_prefix in histogram_name
 373
 374
 375 def _CheckUmaHistogramChanges(input_api, output_api):
 376   """Check that UMA histogram names in touched lines can still be found in other
 377   lines of the patch or in histograms.xml. Note that this check would not catch
 378   the reverse: changes in histograms.xml not matched in the code itself."""
 379   touched_histograms = []
 380   histograms_xml_modifications = []
 381   pattern = input_api.re.compile('UMA_HISTOGRAM.*\("(.*)"')
 382   for f in input_api.AffectedFiles():
 383     # If histograms.xml itself is modified, keep the modified lines for later.
 384     if f.LocalPath().endswith(('histograms.xml')):
 385       histograms_xml_modifications = f.ChangedContents()
 386       continue
 387     if not f.LocalPath().endswith(('cc', 'mm', 'cpp')):
 388       continue
 389     for line_num, line in f.ChangedContents():
 390       found = pattern.search(line)
 391       if found:
 392         touched_histograms.append([found.group(1), f, line_num])
 393
 394   # Search for the touched histogram names in the local modifications to
 395   # histograms.xml, and, if not found, on the base histograms.xml file.
 396   unmatched_histograms = []
 397   for histogram_info in touched_histograms:
 398     histogram_name_found = False
 399     for line_num, line in histograms_xml_modifications:
 400       histogram_name_found = _FindHistogramNameInLine(histogram_info[0], line)
 401       if histogram_name_found:
 402         break
 403     if not histogram_name_found:
 404       unmatched_histograms.append(histogram_info)
 405
 406   problems = []
 407   if unmatched_histograms:
 408     with open('tools/metrics/histograms/histograms.xml') as histograms_xml:
 409       for histogram_name, f, line_num in unmatched_histograms:
 410         histograms_xml.seek(0)
 411         histogram_name_found = False
 412         for line in histograms_xml:
 413           histogram_name_found = _FindHistogramNameInLine(histogram_name, line)
 414           if histogram_name_found:
 415             break
 416         if not histogram_name_found:
 417           problems.append(' [%s:%d] %s' %
 418                           (f.LocalPath(), line_num, histogram_name))
 419
 420   if not problems:
 421     return []
 422   return [output_api.PresubmitPromptWarning('Some UMA_HISTOGRAM lines have '
 423     'been modified and the associated histogram name has no match in either '
 424     'metrics/histograms.xml or the modifications of it:',  problems)]
 425
 426
 427 def _CheckNoNewWStrings(input_api, output_api):
 428   """Checks to make sure we don't introduce use of wstrings."""
 429   problems = []
 430   for f in input_api.AffectedFiles():
 431     if (not f.LocalPath().endswith(('.cc', '.h')) or
 432         f.LocalPath().endswith(('test.cc', '_win.cc', '_win.h')) or
 433         '/win/' in f.LocalPath()):
 434       continue
 435
 436     allowWString = False
 437     for line_num, line in f.ChangedContents():
 438       if 'presubmit: allow wstring' in line:
 439         allowWString = True
 440       elif not allowWString and 'wstring' in line:
 441         problems.append('    %s:%d' % (f.LocalPath(), line_num))
 442         allowWString = False
 443       else:
 444         allowWString = False
 445
 446   if not problems:
 447     return []
 448   return [output_api.PresubmitPromptWarning('New code should not use wstrings.'
 449       '  If you are calling a cross-platform API that accepts a wstring, '
 450       'fix the API.\n' +
 451       '\n'.join(problems))]
 452
 453
 454 def _CheckNoDEPSGIT(input_api, output_api):
 455   """Make sure .DEPS.git is never modified manually."""
 456   if any(f.LocalPath().endswith('.DEPS.git') for f in
 457       input_api.AffectedFiles()):
 458     return [output_api.PresubmitError(
 459       'Never commit changes to .DEPS.git. This file is maintained by an\n'
 460       'automated system based on what\'s in DEPS and your changes will be\n'
 461       'overwritten.\n'
 462       'See https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code#Rolling_DEPS\n'
 463       'for more information')]
 464   return []
 465
 466
 467 def _CheckValidHostsInDEPS(input_api, output_api):
 468   """Checks that DEPS file deps are from allowed_hosts."""
 469   # Run only if DEPS file has been modified to annoy fewer bystanders.
 470   if all(f.LocalPath() != 'DEPS' for f in input_api.AffectedFiles()):
 471     return []
 472   # Outsource work to gclient verify
 473   try:
 474     input_api.subprocess.check_output(['gclient', 'verify'])
 475     return []
 476   except input_api.subprocess.CalledProcessError, error:
 477     return [output_api.PresubmitError(
 478         'DEPS file must have only git dependencies.',
 479         long_text=error.output)]
 480
 481
 482 def _CheckNoBannedFunctions(input_api, output_api):
 483   """Make sure that banned functions are not used."""
 484   warnings = []
 485   errors = []
 486
 487   file_filter = lambda f: f.LocalPath().endswith(('.mm', '.m', '.h'))
 488   for f in input_api.AffectedFiles(file_filter=file_filter):
 489     for line_num, line in f.ChangedContents():
 490       for func_name, message, error in _BANNED_OBJC_FUNCTIONS:
 491         matched = False
 492         if func_name[0:1] == '/':
 493           regex = func_name[1:]
 494           if input_api.re.search(regex, line):
 495             matched = True
 496         elif func_name in line:
 497             matched = True
 498         if matched:
 499           problems = warnings;
 500           if error:
 501             problems = errors;
 502           problems.append('    %s:%d:' % (f.LocalPath(), line_num))
 503           for message_line in message:
 504             problems.append('      %s' % message_line)
 505
 506   file_filter = lambda f: f.LocalPath().endswith(('.cc', '.mm', '.h'))
 507   for f in input_api.AffectedFiles(file_filter=file_filter):
 508     for line_num, line in f.ChangedContents():
 509       for func_name, message, error, excluded_paths in _BANNED_CPP_FUNCTIONS:
 510         def IsBlacklisted(affected_file, blacklist):
 511           local_path = affected_file.LocalPath()
 512           for item in blacklist:
 513             if input_api.re.match(item, local_path):
 514               return True
 515           return False
 516         if IsBlacklisted(f, excluded_paths):
 517           continue
 518         matched = False
 519         if func_name[0:1] == '/':
 520           regex = func_name[1:]
 521           if input_api.re.search(regex, line):
 522             matched = True
 523         elif func_name in line:
 524             matched = True
 525         if matched:
 526           problems = warnings;
 527           if error:
 528             problems = errors;
 529           problems.append('    %s:%d:' % (f.LocalPath(), line_num))
 530           for message_line in message:
 531             problems.append('      %s' % message_line)
 532
 533   result = []
 534   if (warnings):
 535     result.append(output_api.PresubmitPromptWarning(
 536         'Banned functions were used.\n' + '\n'.join(warnings)))
 537   if (errors):
 538     result.append(output_api.PresubmitError(
 539         'Banned functions were used.\n' + '\n'.join(errors)))
 540   return result
 541
 542
 543 def _CheckNoPragmaOnce(input_api, output_api):
 544   """Make sure that banned functions are not used."""
 545   files = []
 546   pattern = input_api.re.compile(r'^#pragma\s+once',
 547                                  input_api.re.MULTILINE)
 548   for f in input_api.AffectedSourceFiles(input_api.FilterSourceFile):
 549     if not f.LocalPath().endswith('.h'):
 550       continue
 551     contents = input_api.ReadFile(f)
 552     if pattern.search(contents):
 553       files.append(f)
 554
 555   if files:
 556     return [output_api.PresubmitError(
 557         'Do not use #pragma once in header files.\n'
 558         'See http://www.chromium.org/developers/coding-style#TOC-File-headers',
 559         files)]
 560   return []
 561
 562
 563 def _CheckNoTrinaryTrueFalse(input_api, output_api):
 564   """Checks to make sure we don't introduce use of foo ? true : false."""
 565   problems = []
 566   pattern = input_api.re.compile(r'\?\s*(true|false)\s*:\s*(true|false)')
 567   for f in input_api.AffectedFiles():
 568     if not f.LocalPath().endswith(('.cc', '.h', '.inl', '.m', '.mm')):
 569       continue
 570
 571     for line_num, line in f.ChangedContents():
 572       if pattern.match(line):
 573         problems.append('    %s:%d' % (f.LocalPath(), line_num))
 574
 575   if not problems:
 576     return []
 577   return [output_api.PresubmitPromptWarning(
 578       'Please consider avoiding the "? true : false" pattern if possible.\n' +
 579       '\n'.join(problems))]
 580
 581
 582 def _CheckUnwantedDependencies(input_api, output_api):
 583   """Runs checkdeps on #include statements added in this
 584   change. Breaking - rules is an error, breaking ! rules is a
 585   warning.
 586   """
 587   import sys
 588   # We need to wait until we have an input_api object and use this
 589   # roundabout construct to import checkdeps because this file is
 590   # eval-ed and thus doesn't have __file__.
 591   original_sys_path = sys.path
 592   try:
 593     sys.path = sys.path + [input_api.os_path.join(
 594         input_api.PresubmitLocalPath(), 'buildtools', 'checkdeps')]
 595     import checkdeps
 596     from cpp_checker import CppChecker
 597     from rules import Rule
 598   finally:
 599     # Restore sys.path to what it was before.
 600     sys.path = original_sys_path
 601
 602   added_includes = []
 603   for f in input_api.AffectedFiles():
 604     if not CppChecker.IsCppFile(f.LocalPath()):
 605       continue
 606
 607     changed_lines = [line for line_num, line in f.ChangedContents()]
 608     added_includes.append([f.LocalPath(), changed_lines])
 609
 610   deps_checker = checkdeps.DepsChecker(input_api.PresubmitLocalPath())
 611
 612   error_descriptions = []
 613   warning_descriptions = []
 614   for path, rule_type, rule_description in deps_checker.CheckAddedCppIncludes(
 615       added_includes):
 616     description_with_path = '%s\n    %s' % (path, rule_description)
 617     if rule_type == Rule.DISALLOW:
 618       error_descriptions.append(description_with_path)
 619     else:
 620       warning_descriptions.append(description_with_path)
 621
 622   results = []
 623   if error_descriptions:
 624     results.append(output_api.PresubmitError(
 625         'You added one or more #includes that violate checkdeps rules.',
 626         error_descriptions))
 627   if warning_descriptions:
 628     results.append(output_api.PresubmitPromptOrNotify(
 629         'You added one or more #includes of files that are temporarily\n'
 630         'allowed but being removed. Can you avoid introducing the\n'
 631         '#include? See relevant DEPS file(s) for details and contacts.',
 632         warning_descriptions))
 633   return results
 634
 635
 636 def _CheckFilePermissions(input_api, output_api):
 637   """Check that all files have their permissions properly set."""
 638   if input_api.platform == 'win32':
 639     return []
 640   args = [input_api.python_executable, 'tools/checkperms/checkperms.py',
 641           '--root', input_api.change.RepositoryRoot()]
 642   for f in input_api.AffectedFiles():
 643     args += ['--file', f.LocalPath()]
 644   checkperms = input_api.subprocess.Popen(args,
 645                                           stdout=input_api.subprocess.PIPE)
 646   errors = checkperms.communicate()[0].strip()
 647   if errors:
 648     return [output_api.PresubmitError('checkperms.py failed.',
 649                                       errors.splitlines())]
 650   return []
 651
 652
 653 def _CheckNoAuraWindowPropertyHInHeaders(input_api, output_api):
 654   """Makes sure we don't include ui/aura/window_property.h
 655   in header files.
 656   """
 657   pattern = input_api.re.compile(r'^#include\s*"ui/aura/window_property.h"')
 658   errors = []
 659   for f in input_api.AffectedFiles():
 660     if not f.LocalPath().endswith('.h'):
 661       continue
 662     for line_num, line in f.ChangedContents():
 663       if pattern.match(line):
 664         errors.append('    %s:%d' % (f.LocalPath(), line_num))
 665
 666   results = []
 667   if errors:
 668     results.append(output_api.PresubmitError(
 669       'Header files should not include ui/aura/window_property.h', errors))
 670   return results
 671
 672
 673 def _CheckIncludeOrderForScope(scope, input_api, file_path, changed_linenums):
 674   """Checks that the lines in scope occur in the right order.
 675
 676   1. C system files in alphabetical order
 677   2. C++ system files in alphabetical order
 678   3. Project's .h files
 679   """
 680
 681   c_system_include_pattern = input_api.re.compile(r'\s*#include <.*\.h>')
 682   cpp_system_include_pattern = input_api.re.compile(r'\s*#include <.*>')
 683   custom_include_pattern = input_api.re.compile(r'\s*#include ".*')
 684
 685   C_SYSTEM_INCLUDES, CPP_SYSTEM_INCLUDES, CUSTOM_INCLUDES = range(3)
 686
 687   state = C_SYSTEM_INCLUDES
 688
 689   previous_line = ''
 690   previous_line_num = 0
 691   problem_linenums = []
 692   for line_num, line in scope:
 693     if c_system_include_pattern.match(line):
 694       if state != C_SYSTEM_INCLUDES:
 695         problem_linenums.append((line_num, previous_line_num))
 696       elif previous_line and previous_line > line:
 697         problem_linenums.append((line_num, previous_line_num))
 698     elif cpp_system_include_pattern.match(line):
 699       if state == C_SYSTEM_INCLUDES:
 700         state = CPP_SYSTEM_INCLUDES
 701       elif state == CUSTOM_INCLUDES:
 702         problem_linenums.append((line_num, previous_line_num))
 703       elif previous_line and previous_line > line:
 704         problem_linenums.append((line_num, previous_line_num))
 705     elif custom_include_pattern.match(line):
 706       if state != CUSTOM_INCLUDES:
 707         state = CUSTOM_INCLUDES
 708       elif previous_line and previous_line > line:
 709         problem_linenums.append((line_num, previous_line_num))
 710     else:
 711       problem_linenums.append(line_num)
 712     previous_line = line
 713     previous_line_num = line_num
 714
 715   warnings = []
 716   for (line_num, previous_line_num) in problem_linenums:
 717     if line_num in changed_linenums or previous_line_num in changed_linenums:
 718       warnings.append('    %s:%d' % (file_path, line_num))
 719   return warnings
 720
 721
 722 def _CheckIncludeOrderInFile(input_api, f, changed_linenums):
 723   """Checks the #include order for the given file f."""
 724
 725   system_include_pattern = input_api.re.compile(r'\s*#include \<.*')
 726   # Exclude the following includes from the check:
 727   # 1) #include <.../...>, e.g., <sys/...> includes often need to appear in a
 728   # specific order.
 729   # 2) <atlbase.h>, "build/build_config.h"
 730   excluded_include_pattern = input_api.re.compile(
 731       r'\s*#include (\<.*/.*|\<atlbase\.h\>|"build/build_config.h")')
 732   custom_include_pattern = input_api.re.compile(r'\s*#include "(?P<FILE>.*)"')
 733   # Match the final or penultimate token if it is xxxtest so we can ignore it
 734   # when considering the special first include.
 735   test_file_tag_pattern = input_api.re.compile(
 736     r'_[a-z]+test(?=(_[a-zA-Z0-9]+)?\.)')
 737   if_pattern = input_api.re.compile(
 738       r'\s*#\s*(if|elif|else|endif|define|undef).*')
 739   # Some files need specialized order of includes; exclude such files from this
 740   # check.
 741   uncheckable_includes_pattern = input_api.re.compile(
 742       r'\s*#include '
 743       '("ipc/.*macros\.h"|<windows\.h>|".*gl.*autogen.h")\s*')
 744
 745   contents = f.NewContents()
 746   warnings = []
 747   line_num = 0
 748
 749   # Handle the special first include. If the first include file is
 750   # some/path/file.h, the corresponding including file can be some/path/file.cc,
 751   # some/other/path/file.cc, some/path/file_platform.cc, some/path/file-suffix.h
 752   # etc. It's also possible that no special first include exists.
 753   # If the included file is some/path/file_platform.h the including file could
 754   # also be some/path/file_xxxtest_platform.h.
 755   including_file_base_name = test_file_tag_pattern.sub(
 756     '', input_api.os_path.basename(f.LocalPath()))
 757
 758   for line in contents:
 759     line_num += 1
 760     if system_include_pattern.match(line):
 761       # No special first include -> process the line again along with normal
 762       # includes.
 763       line_num -= 1
 764       break
 765     match = custom_include_pattern.match(line)
 766     if match:
 767       match_dict = match.groupdict()
 768       header_basename = test_file_tag_pattern.sub(
 769         '', input_api.os_path.basename(match_dict['FILE'])).replace('.h', '')
 770
 771       if header_basename not in including_file_base_name:
 772         # No special first include -> process the line again along with normal
 773         # includes.
 774         line_num -= 1
 775       break
 776
 777   # Split into scopes: Each region between #if and #endif is its own scope.
 778   scopes = []
 779   current_scope = []
 780   for line in contents[line_num:]:
 781     line_num += 1
 782     if uncheckable_includes_pattern.match(line):
 783       continue
 784     if if_pattern.match(line):
 785       scopes.append(current_scope)
 786       current_scope = []
 787     elif ((system_include_pattern.match(line) or
 788            custom_include_pattern.match(line)) and
 789           not excluded_include_pattern.match(line)):
 790       current_scope.append((line_num, line))
 791   scopes.append(current_scope)
 792
 793   for scope in scopes:
 794     warnings.extend(_CheckIncludeOrderForScope(scope, input_api, f.LocalPath(),
 795                                                changed_linenums))
 796   return warnings
 797
 798
 799 def _CheckIncludeOrder(input_api, output_api):
 800   """Checks that the #include order is correct.
 801
 802   1. The corresponding header for source files.
 803   2. C system files in alphabetical order
 804   3. C++ system files in alphabetical order
 805   4. Project's .h files in alphabetical order
 806
 807   Each region separated by #if, #elif, #else, #endif, #define and #undef follows
 808   these rules separately.
 809   """
 810   def FileFilterIncludeOrder(affected_file):
 811     black_list = (_EXCLUDED_PATHS + input_api.DEFAULT_BLACK_LIST)
 812     return input_api.FilterSourceFile(affected_file, black_list=black_list)
 813
 814   warnings = []
 815   for f in input_api.AffectedFiles(file_filter=FileFilterIncludeOrder):
 816     if f.LocalPath().endswith(('.cc', '.h')):
 817       changed_linenums = set(line_num for line_num, _ in f.ChangedContents())
 818       warnings.extend(_CheckIncludeOrderInFile(input_api, f, changed_linenums))
 819
 820   results = []
 821   if warnings:
 822     results.append(output_api.PresubmitPromptOrNotify(_INCLUDE_ORDER_WARNING,
 823                                                       warnings))
 824   return results
 825
 826
 827 def _CheckForVersionControlConflictsInFile(input_api, f):
 828   pattern = input_api.re.compile('^(?:<<<<<<<|>>>>>>>) |^=======$')
 829   errors = []
 830   for line_num, line in f.ChangedContents():
 831     if pattern.match(line):
 832       errors.append('    %s:%d %s' % (f.LocalPath(), line_num, line))
 833   return errors
 834
 835
 836 def _CheckForVersionControlConflicts(input_api, output_api):
 837   """Usually this is not intentional and will cause a compile failure."""
 838   errors = []
 839   for f in input_api.AffectedFiles():
 840     errors.extend(_CheckForVersionControlConflictsInFile(input_api, f))
 841
 842   results = []
 843   if errors:
 844     results.append(output_api.PresubmitError(
 845       'Version control conflict markers found, please resolve.', errors))
 846   return results
 847
 848
 849 def _CheckHardcodedGoogleHostsInLowerLayers(input_api, output_api):
 850   def FilterFile(affected_file):
 851     """Filter function for use with input_api.AffectedSourceFiles,
 852     below.  This filters out everything except non-test files from
 853     top-level directories that generally speaking should not hard-code
 854     service URLs (e.g. src/android_webview/, src/content/ and others).
 855     """
 856     return input_api.FilterSourceFile(
 857       affected_file,
 858       white_list=(r'^(android_webview|base|content|net)[\\\/].*', ),
 859       black_list=(_EXCLUDED_PATHS +
 860                   _TEST_CODE_EXCLUDED_PATHS +
 861                   input_api.DEFAULT_BLACK_LIST))
 862
 863   base_pattern = '"[^"]*google\.com[^"]*"'
 864   comment_pattern = input_api.re.compile('//.*%s' % base_pattern)
 865   pattern = input_api.re.compile(base_pattern)
 866   problems = []  # items are (filename, line_number, line)
 867   for f in input_api.AffectedSourceFiles(FilterFile):
 868     for line_num, line in f.ChangedContents():
 869       if not comment_pattern.search(line) and pattern.search(line):
 870         problems.append((f.LocalPath(), line_num, line))
 871
 872   if problems:
 873     return [output_api.PresubmitPromptOrNotify(
 874         'Most layers below src/chrome/ should not hardcode service URLs.\n'
 875         'Are you sure this is correct?',
 876         ['  %s:%d:  %s' % (
 877             problem[0], problem[1], problem[2]) for problem in problems])]
 878   else:
 879     return []
 880
 881
 882 def _CheckNoAbbreviationInPngFileName(input_api, output_api):
 883   """Makes sure there are no abbreviations in the name of PNG files.
 884   The native_client_sdk directory is excluded because it has auto-generated PNG
 885   files for documentation.
 886   """
 887   errors = []
 888   white_list = (r'.*_[a-z]_.*\.png$|.*_[a-z]\.png$',)
 889   black_list = (r'^native_client_sdk[\\\/]',)
 890   file_filter = lambda f: input_api.FilterSourceFile(
 891       f, white_list=white_list, black_list=black_list)
 892   for f in input_api.AffectedFiles(include_deletes=False,
 893                                    file_filter=file_filter):
 894     errors.append('    %s' % f.LocalPath())
 895
 896   results = []
 897   if errors:
 898     results.append(output_api.PresubmitError(
 899         'The name of PNG files should not have abbreviations. \n'
 900         'Use _hover.png, _center.png, instead of _h.png, _c.png.\n'
 901         'Contact oshima@chromium.org if you have questions.', errors))
 902   return results
 903
 904
 905 def _FilesToCheckForIncomingDeps(re, changed_lines):
 906   """Helper method for _CheckAddedDepsHaveTargetApprovals. Returns
 907   a set of DEPS entries that we should look up.
 908
 909   For a directory (rather than a specific filename) we fake a path to
 910   a specific filename by adding /DEPS. This is chosen as a file that
 911   will seldom or never be subject to per-file include_rules.
 912   """
 913   # We ignore deps entries on auto-generated directories.
 914   AUTO_GENERATED_DIRS = ['grit', 'jni']
 915
 916   # This pattern grabs the path without basename in the first
 917   # parentheses, and the basename (if present) in the second. It
 918   # relies on the simple heuristic that if there is a basename it will
 919   # be a header file ending in ".h".
 920   pattern = re.compile(
 921       r"""['"]\+([^'"]+?)(/[a-zA-Z0-9_]+\.h)?['"].*""")
 922   results = set()
 923   for changed_line in changed_lines:
 924     m = pattern.match(changed_line)
 925     if m:
 926       path = m.group(1)
 927       if path.split('/')[0] not in AUTO_GENERATED_DIRS:
 928         if m.group(2):
 929           results.add('%s%s' % (path, m.group(2)))
 930         else:
 931           results.add('%s/DEPS' % path)
 932   return results
 933
 934
 935 def _CheckAddedDepsHaveTargetApprovals(input_api, output_api):
 936   """When a dependency prefixed with + is added to a DEPS file, we
 937   want to make sure that the change is reviewed by an OWNER of the
 938   target file or directory, to avoid layering violations from being
 939   introduced. This check verifies that this happens.
 940   """
 941   changed_lines = set()
 942   for f in input_api.AffectedFiles():
 943     filename = input_api.os_path.basename(f.LocalPath())
 944     if filename == 'DEPS':
 945       changed_lines |= set(line.strip()
 946                            for line_num, line
 947                            in f.ChangedContents())
 948   if not changed_lines:
 949     return []
 950
 951   virtual_depended_on_files = _FilesToCheckForIncomingDeps(input_api.re,
 952                                                            changed_lines)
 953   if not virtual_depended_on_files:
 954     return []
 955
 956   if input_api.is_committing:
 957     if input_api.tbr:
 958       return [output_api.PresubmitNotifyResult(
 959           '--tbr was specified, skipping OWNERS check for DEPS additions')]
 960     if not input_api.change.issue:
 961       return [output_api.PresubmitError(
 962           "DEPS approval by OWNERS check failed: this change has "
 963           "no Rietveld issue number, so we can't check it for approvals.")]
 964     output = output_api.PresubmitError
 965   else:
 966     output = output_api.PresubmitNotifyResult
 967
 968   owners_db = input_api.owners_db
 969   owner_email, reviewers = input_api.canned_checks._RietveldOwnerAndReviewers(
 970       input_api,
 971       owners_db.email_regexp,
 972       approval_needed=input_api.is_committing)
 973
 974   owner_email = owner_email or input_api.change.author_email
 975
 976   reviewers_plus_owner = set(reviewers)
 977   if owner_email:
 978     reviewers_plus_owner.add(owner_email)
 979   missing_files = owners_db.files_not_covered_by(virtual_depended_on_files,
 980                                                  reviewers_plus_owner)
 981
 982   # We strip the /DEPS part that was added by
 983   # _FilesToCheckForIncomingDeps to fake a path to a file in a
 984   # directory.
 985   def StripDeps(path):
 986     start_deps = path.rfind('/DEPS')
 987     if start_deps != -1:
 988       return path[:start_deps]
 989     else:
 990       return path
 991   unapproved_dependencies = ["'+%s'," % StripDeps(path)
 992                              for path in missing_files]
 993
 994   if unapproved_dependencies:
 995     output_list = [
 996       output('Missing LGTM from OWNERS of dependencies added to DEPS:\n    %s' %
 997              '\n    '.join(sorted(unapproved_dependencies)))]
 998     if not input_api.is_committing:
 999       suggested_owners = owners_db.reviewers_for(missing_files, owner_email)
1000       output_list.append(output(
1001           'Suggested missing target path OWNERS:\n    %s' %
1002           '\n    '.join(suggested_owners or [])))
1003     return output_list
1004
1005   return []
1006
1007
1008 def _CheckSpamLogging(input_api, output_api):
1009   file_inclusion_pattern = r'.+%s' % _IMPLEMENTATION_EXTENSIONS
1010   black_list = (_EXCLUDED_PATHS +
1011                 _TEST_CODE_EXCLUDED_PATHS +
1012                 input_api.DEFAULT_BLACK_LIST +
1013                 (r"^base[\\\/]logging\.h$",
1014                  r"^base[\\\/]logging\.cc$",
1015                  r"^chrome[\\\/]app[\\\/]chrome_main_delegate\.cc$",
1016                  r"^chrome[\\\/]browser[\\\/]chrome_browser_main\.cc$",
1017                  r"^chrome[\\\/]browser[\\\/]ui[\\\/]startup[\\\/]"
1018                      r"startup_browser_creator\.cc$",
1019                  r"^chrome[\\\/]installer[\\\/]setup[\\\/].*",
1020                  r"chrome[\\\/]browser[\\\/]diagnostics[\\\/]" +
1021                      r"diagnostics_writer\.cc$",
1022                  r"^chrome_elf[\\\/]dll_hash[\\\/]dll_hash_main\.cc$",
1023                  r"^chromecast[\\\/]",
1024                  r"^cloud_print[\\\/]",
1025                  r"^content[\\\/]common[\\\/]gpu[\\\/]client[\\\/]"
1026                      r"gl_helper_benchmark\.cc$",
1027                  r"^courgette[\\\/]courgette_tool\.cc$",
1028                  r"^extensions[\\\/]renderer[\\\/]logging_native_handler\.cc$",
1029                  r"^ipc[\\\/]ipc_logging\.cc$",
1030                  r"^native_client_sdk[\\\/]",
1031                  r"^remoting[\\\/]base[\\\/]logging\.h$",
1032                  r"^remoting[\\\/]host[\\\/].*",
1033                  r"^sandbox[\\\/]linux[\\\/].*",
1034                  r"^tools[\\\/]",
1035                  r"^ui[\\\/]aura[\\\/]bench[\\\/]bench_main\.cc$",
1036                  r"^storage[\\\/]browser[\\\/]fileapi[\\\/]" +
1037                      r"dump_file_system.cc$",))
1038   source_file_filter = lambda x: input_api.FilterSourceFile(
1039       x, white_list=(file_inclusion_pattern,), black_list=black_list)
1040
1041   log_info = []
1042   printf = []
1043
1044   for f in input_api.AffectedSourceFiles(source_file_filter):
1045     contents = input_api.ReadFile(f, 'rb')
1046     if input_api.re.search(r"\bD?LOG\s*\(\s*INFO\s*\)", contents):
1047       log_info.append(f.LocalPath())
1048     elif input_api.re.search(r"\bD?LOG_IF\s*\(\s*INFO\s*,", contents):
1049       log_info.append(f.LocalPath())
1050
1051     if input_api.re.search(r"\bprintf\(", contents):
1052       printf.append(f.LocalPath())
1053     elif input_api.re.search(r"\bfprintf\((stdout|stderr)", contents):
1054       printf.append(f.LocalPath())
1055
1056   if log_info:
1057     return [output_api.PresubmitError(
1058       'These files spam the console log with LOG(INFO):',
1059       items=log_info)]
1060   if printf:
1061     return [output_api.PresubmitError(
1062       'These files spam the console log with printf/fprintf:',
1063       items=printf)]
1064   return []
1065
1066
1067 def _CheckForAnonymousVariables(input_api, output_api):
1068   """These types are all expected to hold locks while in scope and
1069      so should never be anonymous (which causes them to be immediately
1070      destroyed)."""
1071   they_who_must_be_named = [
1072     'base::AutoLock',
1073     'base::AutoReset',
1074     'base::AutoUnlock',
1075     'SkAutoAlphaRestore',
1076     'SkAutoBitmapShaderInstall',
1077     'SkAutoBlitterChoose',
1078     'SkAutoBounderCommit',
1079     'SkAutoCallProc',
1080     'SkAutoCanvasRestore',
1081     'SkAutoCommentBlock',
1082     'SkAutoDescriptor',
1083     'SkAutoDisableDirectionCheck',
1084     'SkAutoDisableOvalCheck',
1085     'SkAutoFree',
1086     'SkAutoGlyphCache',
1087     'SkAutoHDC',
1088     'SkAutoLockColors',
1089     'SkAutoLockPixels',
1090     'SkAutoMalloc',
1091     'SkAutoMaskFreeImage',
1092     'SkAutoMutexAcquire',
1093     'SkAutoPathBoundsUpdate',
1094     'SkAutoPDFRelease',
1095     'SkAutoRasterClipValidate',
1096     'SkAutoRef',
1097     'SkAutoTime',
1098     'SkAutoTrace',
1099     'SkAutoUnref',
1100   ]
1101   anonymous = r'(%s)\s*[({]' % '|'.join(they_who_must_be_named)
1102   # bad: base::AutoLock(lock.get());
1103   # not bad: base::AutoLock lock(lock.get());
1104   bad_pattern = input_api.re.compile(anonymous)
1105   # good: new base::AutoLock(lock.get())
1106   good_pattern = input_api.re.compile(r'\bnew\s*' + anonymous)
1107   errors = []
1108
1109   for f in input_api.AffectedFiles():
1110     if not f.LocalPath().endswith(('.cc', '.h', '.inl', '.m', '.mm')):
1111       continue
1112     for linenum, line in f.ChangedContents():
1113       if bad_pattern.search(line) and not good_pattern.search(line):
1114         errors.append('%s:%d' % (f.LocalPath(), linenum))
1115
1116   if errors:
1117     return [output_api.PresubmitError(
1118       'These lines create anonymous variables that need to be named:',
1119       items=errors)]
1120   return []
1121
1122
1123 def _CheckCygwinShell(input_api, output_api):
1124   source_file_filter = lambda x: input_api.FilterSourceFile(
1125       x, white_list=(r'.+\.(gyp|gypi)$',))
1126   cygwin_shell = []
1127
1128   for f in input_api.AffectedSourceFiles(source_file_filter):
1129     for linenum, line in f.ChangedContents():
1130       if 'msvs_cygwin_shell' in line:
1131         cygwin_shell.append(f.LocalPath())
1132         break
1133
1134   if cygwin_shell:
1135     return [output_api.PresubmitError(
1136       'These files should not use msvs_cygwin_shell (the default is 0):',
1137       items=cygwin_shell)]
1138   return []
1139
1140
1141 def _CheckUserActionUpdate(input_api, output_api):
1142   """Checks if any new user action has been added."""
1143   if any('actions.xml' == input_api.os_path.basename(f) for f in
1144          input_api.LocalPaths()):
1145     # If actions.xml is already included in the changelist, the PRESUBMIT
1146     # for actions.xml will do a more complete presubmit check.
1147     return []
1148
1149   file_filter = lambda f: f.LocalPath().endswith(('.cc', '.mm'))
1150   action_re = r'[^a-zA-Z]UserMetricsAction\("([^"]*)'
1151   current_actions = None
1152   for f in input_api.AffectedFiles(file_filter=file_filter):
1153     for line_num, line in f.ChangedContents():
1154       match = input_api.re.search(action_re, line)
1155       if match:
1156         # Loads contents in tools/metrics/actions/actions.xml to memory. It's
1157         # loaded only once.
1158         if not current_actions:
1159           with open('tools/metrics/actions/actions.xml') as actions_f:
1160             current_actions = actions_f.read()
1161         # Search for the matched user action name in |current_actions|.
1162         for action_name in match.groups():
1163           action = 'name="{0}"'.format(action_name)
1164           if action not in current_actions:
1165             return [output_api.PresubmitPromptWarning(
1166               'File %s line %d: %s is missing in '
1167               'tools/metrics/actions/actions.xml. Please run '
1168               'tools/metrics/actions/extract_actions.py to update.'
1169               % (f.LocalPath(), line_num, action_name))]
1170   return []
1171
1172
1173 def _GetJSONParseError(input_api, filename, eat_comments=True):
1174   try:
1175     contents = input_api.ReadFile(filename)
1176     if eat_comments:
1177       json_comment_eater = input_api.os_path.join(
1178           input_api.PresubmitLocalPath(),
1179           'tools', 'json_comment_eater', 'json_comment_eater.py')
1180       process = input_api.subprocess.Popen(
1181           [input_api.python_executable, json_comment_eater],
1182           stdin=input_api.subprocess.PIPE,
1183           stdout=input_api.subprocess.PIPE,
1184           universal_newlines=True)
1185       (contents, _) = process.communicate(input=contents)
1186
1187     input_api.json.loads(contents)
1188   except ValueError as e:
1189     return e
1190   return None
1191
1192
1193 def _GetIDLParseError(input_api, filename):
1194   try:
1195     contents = input_api.ReadFile(filename)
1196     idl_schema = input_api.os_path.join(
1197         input_api.PresubmitLocalPath(),
1198         'tools', 'json_schema_compiler', 'idl_schema.py')
1199     process = input_api.subprocess.Popen(
1200         [input_api.python_executable, idl_schema],
1201         stdin=input_api.subprocess.PIPE,
1202         stdout=input_api.subprocess.PIPE,
1203         stderr=input_api.subprocess.PIPE,
1204         universal_newlines=True)
1205     (_, error) = process.communicate(input=contents)
1206     return error or None
1207   except ValueError as e:
1208     return e
1209
1210
1211 def _CheckParseErrors(input_api, output_api):
1212   """Check that IDL and JSON files do not contain syntax errors."""
1213   actions = {
1214     '.idl': _GetIDLParseError,
1215     '.json': _GetJSONParseError,
1216   }
1217   # These paths contain test data and other known invalid JSON files.
1218   excluded_patterns = [
1219     r'test[\\\/]data[\\\/]',
1220     r'^components[\\\/]policy[\\\/]resources[\\\/]policy_templates\.json$',
1221   ]
1222   # Most JSON files are preprocessed and support comments, but these do not.
1223   json_no_comments_patterns = [
1224     r'^testing[\\\/]',
1225   ]
1226   # Only run IDL checker on files in these directories.
1227   idl_included_patterns = [
1228     r'^chrome[\\\/]common[\\\/]extensions[\\\/]api[\\\/]',
1229     r'^extensions[\\\/]common[\\\/]api[\\\/]',
1230   ]
1231
1232   def get_action(affected_file):
1233     filename = affected_file.LocalPath()
1234     return actions.get(input_api.os_path.splitext(filename)[1])
1235
1236   def MatchesFile(patterns, path):
1237     for pattern in patterns:
1238       if input_api.re.search(pattern, path):
1239         return True
1240     return False
1241
1242   def FilterFile(affected_file):
1243     action = get_action(affected_file)
1244     if not action:
1245       return False
1246     path = affected_file.LocalPath()
1247
1248     if MatchesFile(excluded_patterns, path):
1249       return False
1250
1251     if (action == _GetIDLParseError and
1252         not MatchesFile(idl_included_patterns, path)):
1253       return False
1254     return True
1255
1256   results = []
1257   for affected_file in input_api.AffectedFiles(
1258       file_filter=FilterFile, include_deletes=False):
1259     action = get_action(affected_file)
1260     kwargs = {}
1261     if (action == _GetJSONParseError and
1262         MatchesFile(json_no_comments_patterns, affected_file.LocalPath())):
1263       kwargs['eat_comments'] = False
1264     parse_error = action(input_api,
1265                          affected_file.AbsoluteLocalPath(),
1266                          **kwargs)
1267     if parse_error:
1268       results.append(output_api.PresubmitError('%s could not be parsed: %s' %
1269           (affected_file.LocalPath(), parse_error)))
1270   return results
1271
1272
1273 def _CheckJavaStyle(input_api, output_api):
1274   """Runs checkstyle on changed java files and returns errors if any exist."""
1275   import sys
1276   original_sys_path = sys.path
1277   try:
1278     sys.path = sys.path + [input_api.os_path.join(
1279         input_api.PresubmitLocalPath(), 'tools', 'android', 'checkstyle')]
1280     import checkstyle
1281   finally:
1282     # Restore sys.path to what it was before.
1283     sys.path = original_sys_path
1284
1285   return checkstyle.RunCheckstyle(
1286       input_api, output_api, 'tools/android/checkstyle/chromium-style-5.0.xml',
1287       black_list=_EXCLUDED_PATHS + input_api.DEFAULT_BLACK_LIST)
1288
1289
1290 def _CheckForCopyrightedCode(input_api, output_api):
1291   """Verifies that newly added code doesn't contain copyrighted material
1292   and is properly licensed under the standard Chromium license.
1293
1294   As there can be false positives, we maintain a whitelist file. This check
1295   also verifies that the whitelist file is up to date.
1296   """
1297   import sys
1298   original_sys_path = sys.path
1299   try:
1300     sys.path = sys.path + [input_api.os_path.join(
1301         input_api.PresubmitLocalPath(), 'android_webview', 'tools')]
1302     import copyright_scanner
1303   finally:
1304     # Restore sys.path to what it was before.
1305     sys.path = original_sys_path
1306
1307   return copyright_scanner.ScanAtPresubmit(input_api, output_api)
1308
1309
1310 def _CheckSingletonInHeaders(input_api, output_api):
1311   """Checks to make sure no header files have |Singleton<|."""
1312   def FileFilter(affected_file):
1313     # It's ok for base/memory/singleton.h to have |Singleton<|.
1314     black_list = (_EXCLUDED_PATHS +
1315                   input_api.DEFAULT_BLACK_LIST +
1316                   (r"^base[\\\/]memory[\\\/]singleton\.h$",))
1317     return input_api.FilterSourceFile(affected_file, black_list=black_list)
1318
1319   pattern = input_api.re.compile(r'(?<!class\s)Singleton\s*<')
1320   files = []
1321   for f in input_api.AffectedSourceFiles(FileFilter):
1322     if (f.LocalPath().endswith('.h') or f.LocalPath().endswith('.hxx') or
1323         f.LocalPath().endswith('.hpp') or f.LocalPath().endswith('.inl')):
1324       contents = input_api.ReadFile(f)
1325       for line in contents.splitlines(False):
1326         if (not input_api.re.match(r'//', line) and # Strip C++ comment.
1327             pattern.search(line)):
1328           files.append(f)
1329           break
1330
1331   if files:
1332     return [ output_api.PresubmitError(
1333         'Found Singleton<T> in the following header files.\n' +
1334         'Please move them to an appropriate source file so that the ' +
1335         'template gets instantiated in a single compilation unit.',
1336         files) ]
1337   return []
1338
1339
1340 _DEPRECATED_CSS = [
1341   # Values
1342   ( "-webkit-box", "flex" ),
1343   ( "-webkit-inline-box", "inline-flex" ),
1344   ( "-webkit-flex", "flex" ),
1345   ( "-webkit-inline-flex", "inline-flex" ),
1346   ( "-webkit-min-content", "min-content" ),
1347   ( "-webkit-max-content", "max-content" ),
1348
1349   # Properties
1350   ( "-webkit-background-clip", "background-clip" ),
1351   ( "-webkit-background-origin", "background-origin" ),
1352   ( "-webkit-background-size", "background-size" ),
1353   ( "-webkit-box-shadow", "box-shadow" ),
1354
1355   # Functions
1356   ( "-webkit-gradient", "gradient" ),
1357   ( "-webkit-repeating-gradient", "repeating-gradient" ),
1358   ( "-webkit-linear-gradient", "linear-gradient" ),
1359   ( "-webkit-repeating-linear-gradient", "repeating-linear-gradient" ),
1360   ( "-webkit-radial-gradient", "radial-gradient" ),
1361   ( "-webkit-repeating-radial-gradient", "repeating-radial-gradient" ),
1362 ]
1363
1364 def _CheckNoDeprecatedCSS(input_api, output_api):
1365   """ Make sure that we don't use deprecated CSS
1366       properties, functions or values. Our external
1367       documentation is ignored by the hooks as it
1368       needs to be consumed by WebKit. """
1369   results = []
1370   file_inclusion_pattern = (r".+\.css$",)
1371   black_list = (_EXCLUDED_PATHS +
1372                 _TEST_CODE_EXCLUDED_PATHS +
1373                 input_api.DEFAULT_BLACK_LIST +
1374                 (r"^chrome/common/extensions/docs",
1375                  r"^chrome/docs",
1376                  r"^native_client_sdk"))
1377   file_filter = lambda f: input_api.FilterSourceFile(
1378       f, white_list=file_inclusion_pattern, black_list=black_list)
1379   for fpath in input_api.AffectedFiles(file_filter=file_filter):
1380     for line_num, line in fpath.ChangedContents():
1381       for (deprecated_value, value) in _DEPRECATED_CSS:
1382         if deprecated_value in line:
1383           results.append(output_api.PresubmitError(
1384               "%s:%d: Use of deprecated CSS %s, use %s instead" %
1385               (fpath.LocalPath(), line_num, deprecated_value, value)))
1386   return results
1387
1388
1389 _DEPRECATED_JS = [
1390   ( "__lookupGetter__", "Object.getOwnPropertyDescriptor" ),
1391   ( "__defineGetter__", "Object.defineProperty" ),
1392   ( "__defineSetter__", "Object.defineProperty" ),
1393 ]
1394
1395 def _CheckNoDeprecatedJS(input_api, output_api):
1396   """Make sure that we don't use deprecated JS in Chrome code."""
1397   results = []
1398   file_inclusion_pattern = (r".+\.js$",)  # TODO(dbeam): .html?
1399   black_list = (_EXCLUDED_PATHS + _TEST_CODE_EXCLUDED_PATHS +
1400                 input_api.DEFAULT_BLACK_LIST)
1401   file_filter = lambda f: input_api.FilterSourceFile(
1402       f, white_list=file_inclusion_pattern, black_list=black_list)
1403   for fpath in input_api.AffectedFiles(file_filter=file_filter):
1404     for lnum, line in fpath.ChangedContents():
1405       for (deprecated, replacement) in _DEPRECATED_JS:
1406         if deprecated in line:
1407           results.append(output_api.PresubmitError(
1408               "%s:%d: Use of deprecated JS %s, use %s instead" %
1409               (fpath.LocalPath(), lnum, deprecated, replacement)))
1410   return results
1411
1412
1413 def _CommonChecks(input_api, output_api):
1414   """Checks common to both upload and commit."""
1415   results = []
1416   results.extend(input_api.canned_checks.PanProjectChecks(
1417       input_api, output_api,
1418       excluded_paths=_EXCLUDED_PATHS + _TESTRUNNER_PATHS))
1419   results.extend(_CheckAuthorizedAuthor(input_api, output_api))
1420   results.extend(
1421       _CheckNoProductionCodeUsingTestOnlyFunctions(input_api, output_api))
1422   results.extend(_CheckNoIOStreamInHeaders(input_api, output_api))
1423   results.extend(_CheckNoUNIT_TESTInSourceFiles(input_api, output_api))
1424   results.extend(_CheckNoNewWStrings(input_api, output_api))
1425   results.extend(_CheckNoDEPSGIT(input_api, output_api))
1426   results.extend(_CheckNoBannedFunctions(input_api, output_api))
1427   results.extend(_CheckNoPragmaOnce(input_api, output_api))
1428   results.extend(_CheckNoTrinaryTrueFalse(input_api, output_api))
1429   results.extend(_CheckUnwantedDependencies(input_api, output_api))
1430   results.extend(_CheckFilePermissions(input_api, output_api))
1431   results.extend(_CheckNoAuraWindowPropertyHInHeaders(input_api, output_api))
1432   results.extend(_CheckIncludeOrder(input_api, output_api))
1433   results.extend(_CheckForVersionControlConflicts(input_api, output_api))
1434   results.extend(_CheckPatchFiles(input_api, output_api))
1435   results.extend(_CheckHardcodedGoogleHostsInLowerLayers(input_api, output_api))
1436   results.extend(_CheckNoAbbreviationInPngFileName(input_api, output_api))
1437   results.extend(_CheckForInvalidOSMacros(input_api, output_api))
1438   results.extend(_CheckForInvalidIfDefinedMacros(input_api, output_api))
1439   # TODO(danakj): Remove this when base/move.h is removed.
1440   results.extend(_CheckForUsingSideEffectsOfPass(input_api, output_api))
1441   results.extend(_CheckAddedDepsHaveTargetApprovals(input_api, output_api))
1442   results.extend(
1443       input_api.canned_checks.CheckChangeHasNoTabs(
1444           input_api,
1445           output_api,
1446           source_file_filter=lambda x: x.LocalPath().endswith('.grd')))
1447   results.extend(_CheckSpamLogging(input_api, output_api))
1448   results.extend(_CheckForAnonymousVariables(input_api, output_api))
1449   results.extend(_CheckCygwinShell(input_api, output_api))
1450   results.extend(_CheckUserActionUpdate(input_api, output_api))
1451   results.extend(_CheckNoDeprecatedCSS(input_api, output_api))
1452   results.extend(_CheckNoDeprecatedJS(input_api, output_api))
1453   results.extend(_CheckParseErrors(input_api, output_api))
1454   results.extend(_CheckForIPCRules(input_api, output_api))
1455   results.extend(_CheckForCopyrightedCode(input_api, output_api))
1456   results.extend(_CheckForWindowsLineEndings(input_api, output_api))
1457   results.extend(_CheckSingletonInHeaders(input_api, output_api))
1458
1459   if any('PRESUBMIT.py' == f.LocalPath() for f in input_api.AffectedFiles()):
1460     results.extend(input_api.canned_checks.RunUnitTestsInDirectory(
1461         input_api, output_api,
1462         input_api.PresubmitLocalPath(),
1463         whitelist=[r'^PRESUBMIT_test\.py$']))
1464   return results
1465
1466
1467 def _CheckAuthorizedAuthor(input_api, output_api):
1468   """For non-googler/chromites committers, verify the author's email address is
1469   in AUTHORS.
1470   """
1471   # TODO(maruel): Add it to input_api?
1472   import fnmatch
1473
1474   author = input_api.change.author_email
1475   if not author:
1476     input_api.logging.info('No author, skipping AUTHOR check')
1477     return []
1478   authors_path = input_api.os_path.join(
1479       input_api.PresubmitLocalPath(), 'AUTHORS')
1480   valid_authors = (
1481       input_api.re.match(r'[^#]+\s+\<(.+?)\>\s*$', line)
1482       for line in open(authors_path))
1483   valid_authors = [item.group(1).lower() for item in valid_authors if item]
1484   if not any(fnmatch.fnmatch(author.lower(), valid) for valid in valid_authors):
1485     input_api.logging.info('Valid authors are %s', ', '.join(valid_authors))
1486     return [output_api.PresubmitPromptWarning(
1487         ('%s is not in AUTHORS file. If you are a new contributor, please visit'
1488         '\n'
1489         'http://www.chromium.org/developers/contributing-code and read the '
1490         '"Legal" section\n'
1491         'If you are a chromite, verify the contributor signed the CLA.') %
1492         author)]
1493   return []
1494
1495
1496 def _CheckPatchFiles(input_api, output_api):
1497   problems = [f.LocalPath() for f in input_api.AffectedFiles()
1498       if f.LocalPath().endswith(('.orig', '.rej'))]
1499   if problems:
1500     return [output_api.PresubmitError(
1501         "Don't commit .rej and .orig files.", problems)]
1502   else:
1503     return []
1504
1505
1506 def _DidYouMeanOSMacro(bad_macro):
1507   try:
1508     return {'A': 'OS_ANDROID',
1509             'B': 'OS_BSD',
1510             'C': 'OS_CHROMEOS',
1511             'F': 'OS_FREEBSD',
1512             'L': 'OS_LINUX',
1513             'M': 'OS_MACOSX',
1514             'N': 'OS_NACL',
1515             'O': 'OS_OPENBSD',
1516             'P': 'OS_POSIX',
1517             'S': 'OS_SOLARIS',
1518             'W': 'OS_WIN'}[bad_macro[3].upper()]
1519   except KeyError:
1520     return ''
1521
1522
1523 def _CheckForInvalidOSMacrosInFile(input_api, f):
1524   """Check for sensible looking, totally invalid OS macros."""
1525   preprocessor_statement = input_api.re.compile(r'^\s*#')
1526   os_macro = input_api.re.compile(r'defined\((OS_[^)]+)\)')
1527   results = []
1528   for lnum, line in f.ChangedContents():
1529     if preprocessor_statement.search(line):
1530       for match in os_macro.finditer(line):
1531         if not match.group(1) in _VALID_OS_MACROS:
1532           good = _DidYouMeanOSMacro(match.group(1))
1533           did_you_mean = ' (did you mean %s?)' % good if good else ''
1534           results.append('    %s:%d %s%s' % (f.LocalPath(),
1535                                              lnum,
1536                                              match.group(1),
1537                                              did_you_mean))
1538   return results
1539
1540
1541 def _CheckForInvalidOSMacros(input_api, output_api):
1542   """Check all affected files for invalid OS macros."""
1543   bad_macros = []
1544   for f in input_api.AffectedFiles():
1545     if not f.LocalPath().endswith(('.py', '.js', '.html', '.css')):
1546       bad_macros.extend(_CheckForInvalidOSMacrosInFile(input_api, f))
1547
1548   if not bad_macros:
1549     return []
1550
1551   return [output_api.PresubmitError(
1552       'Possibly invalid OS macro[s] found. Please fix your code\n'
1553       'or add your macro to src/PRESUBMIT.py.', bad_macros)]
1554
1555
1556 def _CheckForInvalidIfDefinedMacrosInFile(input_api, f):
1557   """Check all affected files for invalid "if defined" macros."""
1558   ALWAYS_DEFINED_MACROS = (
1559       "TARGET_CPU_PPC",
1560       "TARGET_CPU_PPC64",
1561       "TARGET_CPU_68K",
1562       "TARGET_CPU_X86",
1563       "TARGET_CPU_ARM",
1564       "TARGET_CPU_MIPS",
1565       "TARGET_CPU_SPARC",
1566       "TARGET_CPU_ALPHA",
1567       "TARGET_IPHONE_SIMULATOR",
1568       "TARGET_OS_EMBEDDED",
1569       "TARGET_OS_IPHONE",
1570       "TARGET_OS_MAC",
1571       "TARGET_OS_UNIX",
1572       "TARGET_OS_WIN32",
1573   )
1574   ifdef_macro = input_api.re.compile(r'^\s*#.*(?:ifdef\s|defined\()([^\s\)]+)')
1575   results = []
1576   for lnum, line in f.ChangedContents():
1577     for match in ifdef_macro.finditer(line):
1578       if match.group(1) in ALWAYS_DEFINED_MACROS:
1579         always_defined = ' %s is always defined. ' % match.group(1)
1580         did_you_mean = 'Did you mean \'#if %s\'?' % match.group(1)
1581         results.append('    %s:%d %s\n\t%s' % (f.LocalPath(),
1582                                                lnum,
1583                                                always_defined,
1584                                                did_you_mean))
1585   return results
1586
1587
1588 def _CheckForInvalidIfDefinedMacros(input_api, output_api):
1589   """Check all affected files for invalid "if defined" macros."""
1590   bad_macros = []
1591   for f in input_api.AffectedFiles():
1592     if f.LocalPath().endswith(('.h', '.c', '.cc', '.m', '.mm')):
1593       bad_macros.extend(_CheckForInvalidIfDefinedMacrosInFile(input_api, f))
1594
1595   if not bad_macros:
1596     return []
1597
1598   return [output_api.PresubmitError(
1599       'Found ifdef check on always-defined macro[s]. Please fix your code\n'
1600       'or check the list of ALWAYS_DEFINED_MACROS in src/PRESUBMIT.py.',
1601       bad_macros)]
1602
1603
1604 def _CheckForUsingSideEffectsOfPass(input_api, output_api):
1605   """Check all affected files for using side effects of Pass."""
1606   errors = []
1607   for f in input_api.AffectedFiles():
1608     if f.LocalPath().endswith(('.h', '.c', '.cc', '.m', '.mm')):
1609       for lnum, line in f.ChangedContents():
1610         # Disallow Foo(*my_scoped_thing.Pass()); See crbug.com/418297.
1611         if input_api.re.search(r'\*[a-zA-Z0-9_]+\.Pass\(\)', line):
1612           errors.append(output_api.PresubmitError(
1613             ('%s:%d uses *foo.Pass() to delete the contents of scoped_ptr. ' +
1614              'See crbug.com/418297.') % (f.LocalPath(), lnum)))
1615   return errors
1616
1617
1618 def _CheckForIPCRules(input_api, output_api):
1619   """Check for same IPC rules described in
1620   http://www.chromium.org/Home/chromium-security/education/security-tips-for-ipc
1621   """
1622   base_pattern = r'IPC_ENUM_TRAITS\('
1623   inclusion_pattern = input_api.re.compile(r'(%s)' % base_pattern)
1624   comment_pattern = input_api.re.compile(r'//.*(%s)' % base_pattern)
1625
1626   problems = []
1627   for f in input_api.AffectedSourceFiles(None):
1628     local_path = f.LocalPath()
1629     if not local_path.endswith('.h'):
1630       continue
1631     for line_number, line in f.ChangedContents():
1632       if inclusion_pattern.search(line) and not comment_pattern.search(line):
1633         problems.append(
1634           '%s:%d\n    %s' % (local_path, line_number, line.strip()))
1635
1636   if problems:
1637     return [output_api.PresubmitPromptWarning(
1638         _IPC_ENUM_TRAITS_DEPRECATED, problems)]
1639   else:
1640     return []
1641
1642
1643 def _CheckForWindowsLineEndings(input_api, output_api):
1644   """Check source code and known ascii text files for Windows style line
1645   endings.
1646   """
1647   known_text_files = r'.*\.(txt|html|htm|mhtml|py|gyp|gypi|gn|isolate)$'
1648
1649   file_inclusion_pattern = (
1650     known_text_files,
1651     r'.+%s' % _IMPLEMENTATION_EXTENSIONS
1652   )
1653
1654   filter = lambda f: input_api.FilterSourceFile(
1655     f, white_list=file_inclusion_pattern, black_list=None)
1656   files = [f.LocalPath() for f in
1657            input_api.AffectedSourceFiles(filter)]
1658
1659   problems = []
1660
1661   for file in files:
1662     fp = open(file, 'r')
1663     for line in fp:
1664       if line.endswith('\r\n'):
1665         problems.append(file)
1666         break
1667     fp.close()
1668
1669   if problems:
1670     return [output_api.PresubmitPromptWarning('Are you sure that you want '
1671         'these files to contain Windows style line endings?\n' +
1672         '\n'.join(problems))]
1673
1674   return []
1675
1676
1677 def CheckChangeOnUpload(input_api, output_api):
1678   results = []
1679   results.extend(_CommonChecks(input_api, output_api))
1680   results.extend(_CheckValidHostsInDEPS(input_api, output_api))
1681   results.extend(_CheckJavaStyle(input_api, output_api))
1682   results.extend(
1683       input_api.canned_checks.CheckGNFormatted(input_api, output_api))
1684   results.extend(_CheckUmaHistogramChanges(input_api, output_api))
1685   return results
1686
1687
1688 def GetTryServerMasterForBot(bot):
1689   """Returns the Try Server master for the given bot.
1690
1691   It tries to guess the master from the bot name, but may still fail
1692   and return None.  There is no longer a default master.
1693   """
1694   # Potentially ambiguous bot names are listed explicitly.
1695   master_map = {
1696       'chromium_presubmit': 'tryserver.chromium.linux',
1697       'blink_presubmit': 'tryserver.chromium.linux',
1698       'tools_build_presubmit': 'tryserver.chromium.linux',
1699   }
1700   master = master_map.get(bot)
1701   if not master:
1702     if 'linux' in bot or 'android' in bot or 'presubmit' in bot:
1703       master = 'tryserver.chromium.linux'
1704     elif 'win' in bot:
1705       master = 'tryserver.chromium.win'
1706     elif 'mac' in bot or 'ios' in bot:
1707       master = 'tryserver.chromium.mac'
1708   return master
1709
1710
1711 def GetDefaultTryConfigs(bots):
1712   """Returns a list of ('bot', set(['tests']), filtered by [bots].
1713   """
1714
1715   builders_and_tests = dict((bot, set(['defaulttests'])) for bot in bots)
1716
1717   # Build up the mapping from tryserver master to bot/test.
1718   out = dict()
1719   for bot, tests in builders_and_tests.iteritems():
1720     out.setdefault(GetTryServerMasterForBot(bot), {})[bot] = tests
1721   return out
1722
1723
1724 def CheckChangeOnCommit(input_api, output_api):
1725   results = []
1726   results.extend(_CommonChecks(input_api, output_api))
1727   # TODO(thestig) temporarily disabled, doesn't work in third_party/
1728   #results.extend(input_api.canned_checks.CheckSvnModifiedDirectories(
1729   #    input_api, output_api, sources))
1730   # Make sure the tree is 'open'.
1731   results.extend(input_api.canned_checks.CheckTreeIsOpen(
1732       input_api,
1733       output_api,
1734       json_url='http://chromium-status.appspot.com/current?format=json'))
1735
1736   results.extend(input_api.canned_checks.CheckChangeHasBugField(
1737       input_api, output_api))
1738   results.extend(input_api.canned_checks.CheckChangeHasDescription(
1739       input_api, output_api))
1740   return results
1741
1742
1743 def GetPreferredTryMasters(project, change):
1744   import re
1745   files = change.LocalPaths()
1746
1747   import os
1748   import json
1749   with open(os.path.join(
1750       change.RepositoryRoot(), 'testing', 'commit_queue', 'config.json')) as f:
1751     cq_config = json.load(f)
1752     cq_trybots = cq_config.get('trybots', {})
1753     builders = cq_trybots.get('launched', {})
1754     for master, master_config in cq_trybots.get('triggered', {}).iteritems():
1755       for triggered_bot in master_config:
1756         builders.get(master, {}).pop(triggered_bot, None)
1757
1758     # Explicitly iterate over copies of dicts since we mutate them.
1759     for master in builders.keys():
1760       for builder in builders[master].keys():
1761         # Do not trigger presubmit builders, since they're likely to fail
1762         # (e.g. OWNERS checks before finished code review), and we're
1763         # running local presubmit anyway.
1764         if 'presubmit' in builder:
1765           builders[master].pop(builder)
1766
1767   return builders