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1 # Copyright 2013 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 | |
6 import functools | |
7 import logging | |
8 import os | |
9 import shlex | |
10 import sys | |
11 | |
12 | |
13 def memoize(default=None): | |
14 """This decorator caches the return value of a parameterless pure function""" | |
15 def memoizer(func): | |
16 val = [] | |
17 @functools.wraps(func) | |
18 def inner(): | |
19 if not val: | |
20 ret = func() | |
21 val.append(ret if ret is not None else default) | |
22 if logging.getLogger().isEnabledFor(logging.INFO): | |
23 print '%s -> %r' % (func.__name__, val[0]) | |
24 return val[0] | |
25 return inner | |
26 return memoizer | |
27 | |
28 | |
29 @memoize() | |
30 def IsWindows(): | |
31 return sys.platform in ['win32', 'cygwin'] | |
32 | |
33 | |
34 @memoize() | |
35 def IsLinux(): | |
36 return sys.platform.startswith(('linux', 'freebsd', 'openbsd')) | |
37 | |
38 | |
39 @memoize() | |
40 def IsMac(): | |
41 return sys.platform == 'darwin' | |
42 | |
43 | |
44 @memoize() | |
45 def gyp_defines(): | |
46 """Parses and returns GYP_DEFINES env var as a dictionary.""" | |
47 return dict(arg.split('=', 1) | |
48 for arg in shlex.split(os.environ.get('GYP_DEFINES', ''))) | |
49 | |
50 @memoize() | |
51 def gyp_generator_flags(): | |
52 """Parses and returns GYP_GENERATOR_FLAGS env var as a dictionary.""" | |
53 return dict(arg.split('=', 1) | |
54 for arg in shlex.split(os.environ.get('GYP_GENERATOR_FLAGS', ''))) | |
55 | |
56 @memoize() | |
57 def gyp_msvs_version(): | |
58 return os.environ.get('GYP_MSVS_VERSION', '') | |
59 | |
60 @memoize() | |
61 def distributor(): | |
62 """ | |
63 Returns a string which is the distributed build engine in use (if any). | |
64 Possible values: 'goma', 'ib', '' | |
65 """ | |
66 if 'goma' in gyp_defines(): | |
67 return 'goma' | |
68 elif IsWindows(): | |
69 if 'CHROME_HEADLESS' in os.environ: | |
70 return 'ib' # use (win and !goma and headless) as approximation of ib | |
71 | |
72 | |
73 @memoize() | |
74 def platform(): | |
75 """ | |
76 Returns a string representing the platform this build is targetted for. | |
77 Possible values: 'win', 'mac', 'linux', 'ios', 'android' | |
78 """ | |
79 if 'OS' in gyp_defines(): | |
80 if 'android' in gyp_defines()['OS']: | |
81 return 'android' | |
82 else: | |
83 return gyp_defines()['OS'] | |
84 elif IsWindows(): | |
85 return 'win' | |
86 elif IsLinux(): | |
87 return 'linux' | |
88 else: | |
89 return 'mac' | |
90 | |
91 | |
92 @memoize() | |
93 def builder(): | |
94 """ | |
95 Returns a string representing the build engine (not compiler) to use. | |
96 Possible values: 'make', 'ninja', 'xcode', 'msvs', 'scons' | |
97 """ | |
98 if 'GYP_GENERATORS' in os.environ: | |
99 # for simplicity, only support the first explicit generator | |
100 generator = os.environ['GYP_GENERATORS'].split(',')[0] | |
101 if generator.endswith('-android'): | |
102 return generator.split('-')[0] | |
103 elif generator.endswith('-ninja'): | |
104 return 'ninja' | |
105 else: | |
106 return generator | |
107 else: | |
108 if platform() == 'android': | |
109 # Good enough for now? Do any android bots use make? | |
110 return 'ninja' | |
111 elif platform() == 'ios': | |
112 return 'xcode' | |
113 elif IsWindows(): | |
114 return 'ninja' | |
115 elif IsLinux(): | |
116 return 'ninja' | |
117 elif IsMac(): | |
118 return 'ninja' | |
119 else: | |
120 assert False, 'Don\'t know what builder we\'re using!' | |
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