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#!/usr/bin/python
# Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
'''Reads the Webkit Version.xcconfig file looking for MAJOR_VERSION and
MINOR_VERSION, emitting them into a webkit_version.h header file as
WEBKIT_MAJOR_VERSION and WEBKIT_MINOR_VERSION macros.
'''
import os
import re
import sys
sys.path.insert(0, '../../build/util')
import lastchange
def ReadVersionFile(fname):
'''Reads the Webkit Version.xcconfig file looking for MAJOR_VERSION and
MINOR_VERSION. This function doesn't attempt to support the full syntax
of xcconfig files.'''
re_major = re.compile('MAJOR_VERSION\s*=\s*(\d+).*')
re_minor = re.compile('MINOR_VERSION\s*=\s*(\d+).*')
major = -1
minor = -1
f = open(fname, 'rb')
line = "not empty"
while line and not (major >= 0 and minor >= 0):
line = f.readline()
if major == -1:
match = re_major.match(line)
if match:
major = int(match.group(1))
continue
if minor == -1:
match = re_minor.match(line)
if match:
minor = int(match.group(1))
continue
assert(major >= 0 and minor >= 0)
return (major, minor)
def GetWebKitRevision(webkit_dir, version_file):
"""Get the WebKit revision, in the form 'trunk@1234'."""
# "svn info" tells us what we want, but third_party/WebKit does *not*
# point at the upstream repo. So instead we run svn info on the directory
# containing the versioning file (which is some subdirectory of WebKit).
version_file_dir = os.path.dirname(version_file)
version_info = lastchange.FetchVersionInfo(
default_lastchange=None,
directory=os.path.join(webkit_dir, version_file_dir))
if (version_info.url.startswith(version_info.root) and
version_info.url.endswith(version_file_dir)):
# Now compute the real WebKit URL by stripping off the version file
# directory from the URL we get out of version_info.
# Further, we want to strip off the "http://svn..." from the left.
# This is the root URL from the repository.
webkit_url = version_info.url[len(version_info.root):-len(version_file_dir)]
webkit_url = webkit_url.strip('/')
else:
# The data isn't as we expect: perhaps they're using git without svn?
# Just dump the output directly.
webkit_url = version_info.url
return "%s@%s" % (webkit_url, version_info.revision)
def EmitVersionHeader(webkit_dir, version_file, output_dir):
'''Given webkit's version file, emit a header file that we can use from
within webkit_glue.cc.
'''
# See .gypi file for discussion of this workaround for the version file.
assert version_file[0] == '/'
version_file = version_file[1:]
major, minor = ReadVersionFile(os.path.join(webkit_dir, version_file))
webkit_revision = GetWebKitRevision(webkit_dir, version_file)
fname = os.path.join(output_dir, "webkit_version.h")
f = open(fname, 'wb')
template = """// webkit_version.h
// generated from %s
#define WEBKIT_VERSION_MAJOR %d
#define WEBKIT_VERSION_MINOR %d
#define WEBKIT_SVN_REVISION "%s"
""" % (version_file, major, minor, webkit_revision)
f.write(template)
f.close()
def main():
EmitVersionHeader(*sys.argv[1:])
if __name__ == "__main__":
main()
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