#!/usr/bin/env python
# Copyright 2013 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.

"""
This file emits the list of reasons why a particular build needs to be clobbered
(or a list of 'landmines').
"""

import sys

import landmine_utils


builder = landmine_utils.builder
distributor = landmine_utils.distributor
gyp_defines = landmine_utils.gyp_defines
gyp_msvs_version = landmine_utils.gyp_msvs_version
platform = landmine_utils.platform


def print_landmines():
  """
  ALL LANDMINES ARE EMITTED FROM HERE.
  """
  # DO NOT add landmines as part of a regular CL. Landmines are a last-effort
  # bandaid fix if a CL that got landed has a build dependency bug and all bots
  # need to be cleaned up. If you're writing a new CL that causes build
  # dependency problems, fix the dependency problems instead of adding a
  # landmine.

  if (distributor() == 'goma' and platform() == 'win32' and
      builder() == 'ninja'):
    print 'Need to clobber winja goma due to backend cwd cache fix.'
  if platform() == 'android':
    print 'Clobber because of unions.'
  if platform() == 'win' and builder() == 'ninja':
    print 'Compile on cc_unittests fails due to symbols removed in r185063.'
  if platform() == 'linux' and builder() == 'ninja':
    print 'Builders switching from make to ninja will clobber on this.'
  if platform() == 'mac':
    print 'Switching from bundle to unbundled dylib (issue 14743002).'
  if platform() in ('win', 'mac'):
    print ('Improper dependency for create_nmf.py broke in r240802, '
           'fixed in r240860.')
  if (platform() == 'win' and builder() == 'ninja' and
      gyp_msvs_version() == '2012' and
      gyp_defines().get('target_arch') == 'x64' and
      gyp_defines().get('dcheck_always_on') == '1'):
    print "Switched win x64 trybots from VS2010 to VS2012."
  if (platform() == 'win' and builder() == 'ninja' and
      gyp_msvs_version().startswith('2013')):
    print "Switched win from VS2010 to VS2013."
    print "Update to VS2013 Update 2."
    print "Update to VS2013 Update 4."
  if (platform() == 'win' and gyp_msvs_version().startswith('2015')):
    print 'Switch to VS2015'
  print 'Need to clobber everything due to an IDL change in r154579 (blink)'
  print 'Need to clobber everything due to gen file moves in r175513 (Blink)'
  if (platform() != 'ios'):
    print 'Clobber to get rid of obselete test plugin after r248358'
    print 'Clobber to rebuild GN files for V8'
  print 'Clobber to get rid of stale generated mojom.h files'
  print 'Need to clobber everything due to build_nexe change in nacl r13424'
  print '[chromium-dev] PSA: clobber build needed for IDR_INSPECTOR_* compil...'
  print 'blink_resources.grd changed: crbug.com/400860'
  print 'ninja dependency cycle: crbug.com/408192'
  print 'Clobber to fix missing NaCl gyp dependencies (crbug.com/427427).'
  print 'Another clobber for missing NaCl gyp deps (crbug.com/427427).'
  print 'Clobber to fix GN not picking up increased ID range (crbug.com/444902)'
  print 'Remove NaCl toolchains from the output dir (crbug.com/456902)'
  if platform() == 'ios':
    print 'Clobber iOS to workaround Xcode deps bug (crbug.com/485435)'
  print 'Clobber: https://github.com/domokit/mojo/issues/269'


def main():
  print_landmines()
  return 0


if __name__ == '__main__':
  sys.exit(main())
