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95 lines
3.4 KiB
Python
95 lines
3.4 KiB
Python
#!/usr/bin/env python
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# Copyright 2014 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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"""Redirects to the version of clang-format checked into the Chrome tree.
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clang-format binaries are pulled down from Google Cloud Storage whenever you
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sync Chrome, to platform-specific locations. This script knows how to locate
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those tools, assuming the script is invoked from inside a Chromium checkout."""
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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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class NotFoundError(Exception):
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"""A file could not be found."""
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def __init__(self, e):
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Exception.__init__(self,
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'Problem while looking for clang-format in Chromium source tree:\n'
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' %s' % e)
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def _FindChromiumSourceRoot():
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"""Return the source root of the current chromium checkout, or die trying."""
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# The use of .gn is somewhat incongruous here, but we need a file uniquely
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# existing at src/. GN does the same thing at least.
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source_root = gclient_utils.FindFileUpwards('.gn')
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if not source_root:
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raise NotFoundError(
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'.gn file not found in any parent of the current path.')
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return source_root
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def FindClangFormatToolInChromiumTree():
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"""Return a path to the clang-format executable, or die trying."""
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tool_path = os.path.join(_FindChromiumSourceRoot(), 'third_party',
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'clang_format', 'bin',
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gclient_utils.GetMacWinOrLinux(),
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'clang-format' + gclient_utils.GetExeSuffix())
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if not os.path.exists(tool_path):
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# TODO(nick): After March 2014, eliminate the following advisory.
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error_text = '''\n GIT CL FORMAT - WINTER WEATHER ADVISORY
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clang-format binaries now come with every Chrome checkout!
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Unfortunately, your depot_tools scripts tried to find clang-format binaries
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in your Chrome checkout, but failed. This is expected if you haven't synced
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since the binaries were added.
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'git cl format' will probably not work until you sync your Chrome tree.
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Sorry about that.
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Contact nick@chromium.org if you have any additional questions.\n\n'''
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error_text += 'File does not exist: %s' % tool_path
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raise NotFoundError(error_text)
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return tool_path
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def FindClangFormatScriptInChromiumTree(script_name):
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"""Return a path to a clang-format helper script, or die trying."""
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script_path = os.path.join(_FindChromiumSourceRoot(), 'third_party',
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'clang_format', 'script', script_name)
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if not os.path.exists(script_path):
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# TODO(thakis): Remove the fallback to the old location after a few weeks.
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script_path = os.path.join(_FindChromiumSourceRoot(), 'third_party',
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'clang_format', 'scripts', script_name)
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if not os.path.exists(script_path):
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raise NotFoundError('File does not exist: %s' % script_path)
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return script_path
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def main(args):
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try:
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tool = FindClangFormatToolInChromiumTree()
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except NotFoundError, e:
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print >> sys.stderr, e
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sys.exit(1)
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# Add some visibility to --help showing where the tool lives, since this
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# redirection can be a little opaque.
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help_syntax = ('-h', '--help', '-help', '-help-list', '--help-list')
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if any(match in args for match in help_syntax):
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print '\nDepot tools redirects you to the clang-format at:\n %s\n' % tool
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return subprocess.call([tool] + sys.argv[1:])
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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