127 lines
4.0 KiB
Python
127 lines
4.0 KiB
Python
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#!/usr/bin/env python3
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#
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# Copyright 2021 The Abseil Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""A script to do source transformations to create a new LTS release.
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Usage: ./create_lts.py YYYYMMDD
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"""
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import sys
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def ReplaceStringsInFile(filename, replacement_dict):
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"""Performs textual replacements in a file.
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Rewrites filename with the keys in replacement_dict replaced with
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their values. This function assumes the file can fit in memory.
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Args:
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filename: the filename to perform the replacement on
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replacement_dict: a dictionary of key strings to be replaced with their
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values
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Raises:
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Exception: A failure occured
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"""
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f = open(filename, 'r')
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content = f.read()
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f.close()
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for key, value in replacement_dict.items():
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original = content
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content = content.replace(key, value)
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if content == original:
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raise Exception('Failed to find {} in {}'.format(key, filename))
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f = open(filename, 'w')
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f.write(content)
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f.close()
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def StripContentBetweenTags(filename, strip_begin_tag, strip_end_tag):
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"""Strip contents from a file.
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Rewrites filename with by removing all content between
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strip_begin_tag and strip_end_tag, including the tags themselves.
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Args:
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filename: the filename to perform the replacement on
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strip_begin_tag: the start of the content to be removed
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strip_end_tag: the end of the content to be removed
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Raises:
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Exception: A failure occured
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"""
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f = open(filename, 'r')
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content = f.read()
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f.close()
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while True:
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begin = content.find(strip_begin_tag)
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if begin == -1:
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break
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end = content.find(strip_end_tag, begin + len(strip_begin_tag))
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if end == -1:
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raise Exception('{}: imbalanced strip begin ({}) and '
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'end ({}) tags'.format(filename, strip_begin_tag,
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strip_end_tag))
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content = content.replace(content[begin:end + len(strip_end_tag)], '')
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f = open(filename, 'w')
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f.write(content)
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f.close()
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def main(argv):
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if len(argv) != 2:
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print('Usage: {} YYYYMMDD'.format(sys.argv[0], file=sys.stderr))
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sys.exit(1)
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datestamp = sys.argv[1]
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if len(datestamp) != 8 or not datestamp.isdigit():
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raise Exception(
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'datestamp={} is not in the YYYYMMDD format'.format(datestamp))
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# Replacement directives go here.
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ReplaceStringsInFile(
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'absl/base/options.h', {
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'#define ABSL_OPTION_USE_INLINE_NAMESPACE 0':
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'#define ABSL_OPTION_USE_INLINE_NAMESPACE 1',
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'#define ABSL_OPTION_INLINE_NAMESPACE_NAME head':
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'#define ABSL_OPTION_INLINE_NAMESPACE_NAME lts_{}'.format(
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datestamp)
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})
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ReplaceStringsInFile(
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'CMakeLists.txt', {
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'project(absl LANGUAGES CXX)':
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'project(absl LANGUAGES CXX VERSION {})'.format(datestamp)
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})
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# Set the SOVERSION to YYMM.0.0 - The first 0 means we only have ABI
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# compatible changes, and the second 0 means we can increment it to
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# mark changes as ABI-compatible, for patch releases. Note that we
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# only use the last two digits of the year and the month because the
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# MacOS linker requires the first part of the SOVERSION to fit into
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# 16 bits.
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# https://www.sicpers.info/2013/03/how-to-version-a-mach-o-library/
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ReplaceStringsInFile(
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'CMake/AbseilHelpers.cmake',
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{'SOVERSION 0': 'SOVERSION "{}.0.0"'.format(datestamp[2:6])})
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StripContentBetweenTags('CMakeLists.txt', '# absl:lts-remove-begin',
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'# absl:lts-remove-end')
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if __name__ == '__main__':
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main(sys.argv)
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