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75 lines
2.8 KiB
Python
75 lines
2.8 KiB
Python
#!/usr/bin/env python
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# 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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"""This script is a wrapper around the GN binary that is pulled from Google
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Cloud Storage when you sync Chrome. The binaries go into platform-specific
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subdirectories in the source tree.
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This script makes there be one place for forwarding to the correct platform's
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binary. It will also automatically try to find the gn binary when run inside
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the chrome source tree, so users can just type "gn" on the command line
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(normally depot_tools is on the path)."""
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import gclient_utils
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import os
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import subprocess
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import sys
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def PruneVirtualEnv():
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# Set by VirtualEnv, no need to keep it.
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os.environ.pop('VIRTUAL_ENV', None)
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# Set by VPython, if scripts want it back they have to set it explicitly.
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os.environ.pop('PYTHONNOUSERSITE', None)
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# Look for "activate_this.py" in this path, which is installed by VirtualEnv.
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# This mechanism is used by vpython as well to sanitize VirtualEnvs from
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# $PATH.
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os.environ['PATH'] = os.pathsep.join([
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p for p in os.environ.get('PATH', '').split(os.pathsep)
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if not os.path.isfile(os.path.join(p, 'activate_this.py'))
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])
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def main(args):
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# Prune all evidence of VPython/VirtualEnv out of the environment. This means
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# that we 'unwrap' vpython VirtualEnv path/env manipulation. Invocations of
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# `python` from GN should never inherit the gn.py's own VirtualEnv. This also
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# helps to ensure that generated ninja files do not reference python.exe from
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# the VirtualEnv generated from depot_tools' own .vpython file (or lack
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# thereof), but instead reference the default python from the PATH.
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PruneVirtualEnv()
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# Try in primary solution location first, with the gn binary having been
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# downloaded by cipd in the projects DEPS.
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gn_path = os.path.join(gclient_utils.GetPrimarySolutionPath(), 'third_party',
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'gn', 'gn' + gclient_utils.GetExeSuffix())
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if os.path.exists(gn_path):
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return subprocess.call([gn_path] + args[1:])
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# Otherwise try the old .sha1 and download_from_google_storage locations
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# inside of buildtools.
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bin_path = gclient_utils.GetBuildtoolsPlatformBinaryPath()
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if not bin_path:
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print >> sys.stderr, ('gn.py: Could not find checkout in any parent of '
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'the current path.\nThis must be run inside a '
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'checkout.')
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return 1
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gn_path = os.path.join(bin_path, 'gn' + gclient_utils.GetExeSuffix())
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if not os.path.exists(gn_path):
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print >> sys.stderr, 'gn.py: Could not find gn executable at: %s' % gn_path
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return 2
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else:
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return subprocess.call([gn_path] + args[1:])
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if __name__ == '__main__':
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try:
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sys.exit(main(sys.argv))
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except KeyboardInterrupt:
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sys.stderr.write('interrupted\n')
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sys.exit(1)
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