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103 lines
3.9 KiB
Python
103 lines
3.9 KiB
Python
#!/usr/bin/env python3
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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_paths
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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
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# VirtualEnv. This mechanism is used by vpython as well to sanitize
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# VirtualEnvs from $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 findGnInPath():
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env_path = os.getenv('PATH')
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if not env_path:
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return
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exe = 'gn'
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if sys.platform in ('win32', 'cygwin'):
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exe += '.exe'
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for bin_dir in env_path.split(os.pathsep):
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if bin_dir.rstrip(os.sep).endswith('depot_tools'):
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# skip depot_tools to avoid calling gn.py infinitely.
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continue
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gn_path = os.path.join(bin_dir, exe)
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if os.path.isfile(gn_path):
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return gn_path
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def main(args):
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# Prune all evidence of VPython/VirtualEnv out of the environment. This
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# means that we 'unwrap' vpython VirtualEnv path/env manipulation.
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# Invocations of `python` from GN should never inherit the gn.py's own
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# VirtualEnv. This also helps to ensure that generated ninja files do not
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# reference python.exe from the VirtualEnv generated from depot_tools' own
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# .vpython3 file (or lack thereof), but instead reference the default python
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# 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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primary_solution_path = gclient_paths.GetPrimarySolutionPath()
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if primary_solution_path:
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gn_path = os.path.join(primary_solution_path, 'third_party', 'gn',
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'gn' + gclient_paths.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_paths.GetBuildtoolsPlatformBinaryPath()
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if not bin_path:
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gn_path = findGnInPath()
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if gn_path:
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return subprocess.call([gn_path] + args[1:])
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print(
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'gn.py: Could not find checkout in any parent of the current '
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'path.\nThis must be run inside a checkout.',
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file=sys.stderr)
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return 1
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# TODO(b/328065301): Once chromium/src CL has landed to migrate
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# buildtools/<platform>/gn to buildtools/<platform>/gn/gn, only return
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# gn/gn path.
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old_gn_path = os.path.join(bin_path, 'gn' + gclient_paths.GetExeSuffix())
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new_gn_path = os.path.join(bin_path, 'gn',
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'gn' + gclient_paths.GetExeSuffix())
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paths = [new_gn_path, old_gn_path]
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for path in paths:
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if os.path.isfile(path):
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return subprocess.call([path] + args[1:])
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print('gn.py: Could not find gn executable at: %s' % paths, file=sys.stderr)
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return 2
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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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