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97 lines
3.0 KiB
Python
97 lines
3.0 KiB
Python
#!/usr/bin/env python
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# Copyright (c) 2011 The Chromium OS 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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"""Wrapper for chromite tools.
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The script is intend to be symlinked to any number of chromite tools, attempts
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to find the path for chromite, and hands off to the right tool via exec if
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possible.
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It is intended to used strictly outside of the chroot.
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If you're looking at a copy and want to know where the original looks at, look
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here:
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http://git.chromium.org/gitweb/?p=chromite.git;a=blob;f=bin/chromite
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Since this script is _copied_, it should remain small and not use internal libs.
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"""
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import errno
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import os
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import sys
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# Due to historical reasons, and the fact depot_tools ToT is used by older
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# factory branches (lacking chromite script cleanups), note we have to
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# fallback to some odd import locations. This is the only reason for the
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# fallback code- any/all new scripts symlinked to this script *must* exist
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# in chromite/bin/ .
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def _FindChromite(path):
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"""Find the chromite dir in a repo or gclient checkout."""
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path = os.path.abspath(path)
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# Depending on the checkout type (whether repo chromeos or gclient chrome)
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# Chromite lives in a different location.
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roots = (
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('.repo', 'chromite/.git'),
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('.gclient', 'src/third_party/chromite/.git'),
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('src/.gitmodules', 'src/third_party/chromite/.git'),
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)
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while path != '/':
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for root, chromite_git_dir in roots:
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if all(os.path.exists(os.path.join(path, x))
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for x in [root, chromite_git_dir]):
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return os.path.dirname(os.path.join(path, chromite_git_dir))
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path = os.path.dirname(path)
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return None
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def _MissingErrorOut(target):
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sys.stderr.write(
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"""ERROR: Couldn't find the chromite tool %s.
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Please change to a directory inside your Chromium OS source tree
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and retry. If you need to setup a Chromium OS source tree, see
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http://www.chromium.org/chromium-os/developer-guide
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""" % target)
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return 127
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def main():
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chromite_dir = _FindChromite(os.getcwd())
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target = os.path.basename(sys.argv[0])
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if chromite_dir is None:
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return _MissingErrorOut(target)
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path = os.path.join(chromite_dir, 'bin', target)
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try:
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os.execv(path, [path] + sys.argv[1:])
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except EnvironmentError, e:
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if e.errno not in (errno.ENOENT, errno.EPERM):
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raise
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# Reaching here means it's either a bad target, or we're working against
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# an old (pre 6be2efcf5bb575b03862113eec097c44d8d7f93e) revision of
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# chromite. Fallback to trying to import it; this code works at least as
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# far back as branch 0.11.241.B; likely further.
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if target == 'cbuildbot':
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target = 'chromite.buildbot.cbuildbot'
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else:
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target = 'chromite.bin.%s' % (target,)
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# Adjust the path importation so we can import our our target.
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sys.path.insert(0, os.path.dirname(chromite_dir))
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try:
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module = __import__(target, fromlist=['main'])
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except ImportError:
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return _MissingErrorOut(target)
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return module.main()
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if __name__ == '__main__':
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sys.exit(main())
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