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Side by Side Diff: build/landmines.py

Issue 2101243005: Add a snapshot of flutter/engine/src/build to our sdk (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: add README.dart Created 4 years, 5 months ago
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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 the first hook (See DEPS). If it detects that
8 the build should be clobbered, it will delete the contents of the build
9 directory.
10
11 A landmine is tripped when a builder checks out a different revision, and the
12 diff between the new landmines and the old ones is non-null. At this point, the
13 build is clobbered.
14 """
15
16 import difflib
17 import errno
18 import logging
19 import optparse
20 import os
21 import sys
22 import subprocess
23 import time
24
25 import clobber
26 import landmine_utils
27
28
29 SRC_DIR = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
30
31
32 def get_build_dir(build_tool, 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'
37 '/mnt/data/b/build/slave/linux/build/src/out'
38 '/b/build/slave/ios_rel_device/build/src/xcodebuild'
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 elif build_tool in ['make', 'ninja', 'ninja-ios']: # TODO: Remove ninja-ios.
46 if 'CHROMIUM_OUT_DIR' in os.environ:
47 output_dir = os.environ.get('CHROMIUM_OUT_DIR').strip()
48 if not output_dir:
49 raise Error('CHROMIUM_OUT_DIR environment variable is set but blank!')
50 else:
51 output_dir = landmine_utils.gyp_generator_flags().get('output_dir', 'out')
52 ret = os.path.join(SRC_DIR, output_dir)
53 else:
54 raise NotImplementedError('Unexpected GYP_GENERATORS (%s)' % build_tool)
55 return os.path.abspath(ret)
56
57
58 def clobber_if_necessary(new_landmines):
59 """Does the work of setting, planting, and triggering landmines."""
60 out_dir = get_build_dir(landmine_utils.builder())
61 landmines_path = os.path.normpath(os.path.join(out_dir, '..', '.landmines'))
62 try:
63 os.makedirs(out_dir)
64 except OSError as e:
65 if e.errno == errno.EEXIST:
66 pass
67
68 if os.path.exists(landmines_path):
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 sys.stdout.write('Clobbering due to:\n')
77 sys.stdout.writelines(diff)
78
79 clobber.clobber(out_dir)
80
81 # Save current set of landmines for next time.
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
123 landmines = []
124 for s in landmine_scripts:
125 proc = subprocess.Popen([sys.executable, s], stdout=subprocess.PIPE)
126 output, _ = proc.communicate()
127 landmines.extend([('%s\n' % l.strip()) for l in output.splitlines()])
128 clobber_if_necessary(landmines)
129
130 return 0
131
132
133 if __name__ == '__main__':
134 sys.exit(main())
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