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#!/usr/bin/env python
# Copyright (c) 2012 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 script runs every build as a hook. If it detects that the build should
be clobbered, it will touch the file <build_dir>/.landmine_triggered. The
various build scripts will then check for the presence of this file and clobber
accordingly. The script will also emit the reasons for the clobber to stdout.
A landmine is tripped when a builder checks out a different revision, and the
diff between the new landmines and the old ones is non-null. At this point, the
build is clobbered.
"""
import difflib
import gyp_helper
import logging
import optparse
import os
import sys
import subprocess
import time
import landmine_utils
SRC_DIR = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
def get_target_build_dir(build_tool, target, is_iphone=False):
"""
Returns output directory absolute path dependent on build and targets.
Examples:
r'c:\b\build\slave\win\build\src\out\Release'
'/mnt/data/b/build/slave/linux/build/src/out/Debug'
'/b/build/slave/ios_rel_device/build/src/xcodebuild/Release-iphoneos'
Keep this function in sync with tools/build/scripts/slave/compile.py
"""
ret = None
if build_tool == 'xcode':
ret = os.path.join(SRC_DIR, 'xcodebuild',
target + ('-iphoneos' if is_iphone else ''))
elif build_tool in ['make', 'ninja', 'ninja-ios']: # TODO: Remove ninja-ios.
ret = os.path.join(SRC_DIR, 'out', target)
elif build_tool in ['msvs', 'vs', 'ib']:
ret = os.path.join(SRC_DIR, 'build', target)
elif build_tool == 'scons':
ret = os.path.join(SRC_DIR, 'sconsbuild', target)
else:
raise NotImplementedError('Unexpected GYP_GENERATORS (%s)' % build_tool)
return os.path.abspath(ret)
def set_up_landmines(target, new_landmines):
"""Does the work of setting, planting, and triggering landmines."""
out_dir = get_target_build_dir(landmine_utils.builder(), target,
landmine_utils.platform() == 'ios')
landmines_path = os.path.join(out_dir, '.landmines')
if not os.path.exists(out_dir):
os.makedirs(out_dir)
if not os.path.exists(landmines_path):
with open(landmines_path, 'w') as f:
f.writelines(new_landmines)
else:
triggered = os.path.join(out_dir, '.landmines_triggered')
with open(landmines_path, 'r') as f:
old_landmines = f.readlines()
if old_landmines != new_landmines:
old_date = time.ctime(os.stat(landmines_path).st_ctime)
diff = difflib.unified_diff(old_landmines, new_landmines,
fromfile='old_landmines', tofile='new_landmines',
fromfiledate=old_date, tofiledate=time.ctime(), n=0)
with open(triggered, 'w') as f:
f.writelines(diff)
elif os.path.exists(triggered):
# Remove false triggered landmines.
os.remove(triggered)
def main():
parser = optparse.OptionParser()
parser.add_option(
'-s', '--landmine-scripts', action='append',
default=[os.path.join(SRC_DIR, 'build', 'get_landmines.py')],
help='Path to the script which emits landmines to stdout. The target '
'is passed to this script via option -t.')
parser.add_option('-v', '--verbose', action='store_true',
default=('LANDMINES_VERBOSE' in os.environ),
help=('Emit some extra debugging information (default off). This option '
'is also enabled by the presence of a LANDMINES_VERBOSE environment '
'variable.'))
options, args = parser.parse_args()
if args:
parser.error('Unknown arguments %s' % args)
logging.basicConfig(
level=logging.DEBUG if options.verbose else logging.ERROR)
gyp_helper.apply_chromium_gyp_env()
for target in ('Debug', 'Release', 'Debug_x64', 'Release_x64'):
landmines = []
for s in options.landmine_scripts:
proc = subprocess.Popen([sys.executable, s, '-t', target],
stdout=subprocess.PIPE)
output, _ = proc.communicate()
landmines.extend([('%s\n' % l.strip()) for l in output.splitlines()])
set_up_landmines(target, landmines)
return 0
if __name__ == '__main__':
sys.exit(main())
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