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90 lines
2.0 KiB
Python
90 lines
2.0 KiB
Python
# Copyright 2013 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import functools
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import logging
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import os
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import shlex
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import sys
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def memoize(default=None):
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"""This decorator caches the return value of a parameterless pure function"""
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def memoizer(func):
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val = []
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@functools.wraps(func)
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def inner():
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if not val:
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ret = func()
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val.append(ret if ret is not None else default)
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if logging.getLogger().isEnabledFor(logging.INFO):
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print '%s -> %r' % (func.__name__, val[0])
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return val[0]
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return inner
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return memoizer
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@memoize()
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def IsWindows():
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return sys.platform in ['win32', 'cygwin']
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@memoize()
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def IsLinux():
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return sys.platform.startswith(('linux', 'freebsd', 'netbsd', 'openbsd'))
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@memoize()
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def IsMac():
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return sys.platform == 'darwin'
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@memoize()
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def gyp_defines():
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"""Parses and returns GYP_DEFINES env var as a dictionary."""
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return dict(arg.split('=', 1)
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for arg in shlex.split(os.environ.get('GYP_DEFINES', '')))
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@memoize()
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def gyp_generator_flags():
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"""Parses and returns GYP_GENERATOR_FLAGS env var as a dictionary."""
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return dict(arg.split('=', 1)
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for arg in shlex.split(os.environ.get('GYP_GENERATOR_FLAGS', '')))
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@memoize()
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def gyp_msvs_version():
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return os.environ.get('GYP_MSVS_VERSION', '')
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@memoize()
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def distributor():
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"""
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Returns a string which is the distributed build engine in use (if any).
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Possible values: 'goma', None
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"""
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if 'goma' in gyp_defines():
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return 'goma'
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@memoize()
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def platform():
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"""
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Returns a string representing the platform this build is targeted for.
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Possible values: 'win', 'mac', 'linux', 'ios', 'android'
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"""
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if 'OS' in gyp_defines():
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if 'android' in gyp_defines()['OS']:
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return 'android'
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else:
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return gyp_defines()['OS']
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elif IsWindows():
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return 'win'
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elif IsLinux():
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return 'linux'
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else:
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return 'mac'
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