1 #!/usr/bin/env python 2 # Copyright (c) 2012 The Chromium Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style license that can be 4 # found in the LICENSE file. 5 6 """ 7 This script runs every build as a hook. If it detects that the build should 8 be clobbered, it will touch the file <build_dir>/.landmine_triggered. The 9 various build scripts will then check for the presence of this file and clobber 10 accordingly. The script will also emit the reasons for the clobber to stdout. 11 12 A landmine is tripped when a builder checks out a different revision, and the 13 diff between the new landmines and the old ones is non-null. At this point, the 14 build is clobbered. 15 """ 16 17 import difflib 18 import errno 19 import logging 20 import optparse 21 import os 22 import sys 23 import subprocess 24 import time 25 26 import landmine_utils 27 28 29 SRC_DIR = os.path.dirname(os.path.dirname(os.path.realpath(__file__))) 30 31 32 def get_target_build_dir(build_tool, target, is_iphone=False): 33 """ 34 Returns output directory absolute path dependent on build and targets. 35 Examples: 36 r'c:\b\build\slave\win\build\src\out\Release' 37 '/mnt/data/b/build/slave/linux/build/src/out/Debug' 38 '/b/build/slave/ios_rel_device/build/src/xcodebuild/Release-iphoneos' 39 40 Keep this function in sync with tools/build/scripts/slave/compile.py 41 """ 42 ret = None 43 if build_tool == 'xcode': 44 ret = os.path.join(SRC_DIR, 'xcodebuild', 45 target + ('-iphoneos' if is_iphone else '')) 46 elif build_tool in ['make', 'ninja', 'ninja-ios']: # TODO: Remove ninja-ios. 47 ret = os.path.join(SRC_DIR, 'out', target) 48 elif build_tool in ['msvs', 'vs', 'ib']: 49 ret = os.path.join(SRC_DIR, 'build', target) 50 else: 51 raise NotImplementedError('Unexpected GYP_GENERATORS (%s)' % build_tool) 52 return os.path.abspath(ret) 53 54 55 def set_up_landmines(target, new_landmines): 56 """Does the work of setting, planting, and triggering landmines.""" 57 out_dir = get_target_build_dir(landmine_utils.builder(), target, 58 landmine_utils.platform() == 'ios') 59 60 landmines_path = os.path.join(out_dir, '.landmines') 61 try: 62 os.makedirs(out_dir) 63 except OSError as e: 64 if e.errno == errno.EEXIST: 65 pass 66 67 if os.path.exists(landmines_path): 68 triggered = os.path.join(out_dir, '.landmines_triggered') 69 with open(landmines_path, 'r') as f: 70 old_landmines = f.readlines() 71 if old_landmines != new_landmines: 72 old_date = time.ctime(os.stat(landmines_path).st_ctime) 73 diff = difflib.unified_diff(old_landmines, new_landmines, 74 fromfile='old_landmines', tofile='new_landmines', 75 fromfiledate=old_date, tofiledate=time.ctime(), n=0) 76 77 with open(triggered, 'w') as f: 78 f.writelines(diff) 79 elif os.path.exists(triggered): 80 # Remove false triggered landmines. 81 os.remove(triggered) 82 with open(landmines_path, 'w') as f: 83 f.writelines(new_landmines) 84 85 86 def process_options(): 87 """Returns a list of landmine emitting scripts.""" 88 parser = optparse.OptionParser() 89 parser.add_option( 90 '-s', '--landmine-scripts', action='append', 91 default=[os.path.join(SRC_DIR, 'build', 'get_landmines.py')], 92 help='Path to the script which emits landmines to stdout. The target ' 93 'is passed to this script via option -t. Note that an extra ' 94 'script can be specified via an env var EXTRA_LANDMINES_SCRIPT.') 95 parser.add_option('-v', '--verbose', action='store_true', 96 default=('LANDMINES_VERBOSE' in os.environ), 97 help=('Emit some extra debugging information (default off). This option ' 98 'is also enabled by the presence of a LANDMINES_VERBOSE environment ' 99 'variable.')) 100 101 options, args = parser.parse_args() 102 103 if args: 104 parser.error('Unknown arguments %s' % args) 105 106 logging.basicConfig( 107 level=logging.DEBUG if options.verbose else logging.ERROR) 108 109 extra_script = os.environ.get('EXTRA_LANDMINES_SCRIPT') 110 if extra_script: 111 return options.landmine_scripts + [extra_script] 112 else: 113 return options.landmine_scripts 114 115 116 def main(): 117 landmine_scripts = process_options() 118 119 if landmine_utils.builder() in ('dump_dependency_json', 'eclipse'): 120 return 0 121 122 for target in ('Debug', 'Release', 'Debug_x64', 'Release_x64'): 123 landmines = [] 124 for s in landmine_scripts: 125 proc = subprocess.Popen([sys.executable, s, '-t', target], 126 stdout=subprocess.PIPE) 127 output, _ = proc.communicate() 128 landmines.extend([('%s\n' % l.strip()) for l in output.splitlines()]) 129 set_up_landmines(target, landmines) 130 131 return 0 132 133 134 if __name__ == '__main__': 135 sys.exit(main()) 136
