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fuse_gtest_files.py
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fuse_gtest_files.py
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#!/usr/bin/env python
#
# Copyright 2009, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""fuse_gtest_files.py v0.2.0
Fuses Google Test source code into a .h file and a .cc file.
SYNOPSIS
fuse_gtest_files.py [GTEST_ROOT_DIR] OUTPUT_DIR
Scans GTEST_ROOT_DIR for Google Test source code, and generates
two files: OUTPUT_DIR/gtest/gtest.h and OUTPUT_DIR/gtest/gtest-all.cc.
Then you can build your tests by adding OUTPUT_DIR to the include
search path and linking with OUTPUT_DIR/gtest/gtest-all.cc. These
two files contain everything you need to use Google Test. Hence
you can "install" Google Test by copying them to wherever you want.
GTEST_ROOT_DIR can be omitted and defaults to the parent
directory of the directory holding this script.
EXAMPLES
./fuse_gtest_files.py fused_gtest
./fuse_gtest_files.py path/to/unpacked/gtest fused_gtest
This tool is experimental. In particular, it assumes that there is no
conditional inclusion of Google Test headers. Please report any
problems to googletestframework@googlegroups.com. You can read
https://github.com/google/googletest/blob/master/googletest/docs/AdvancedGuide.md for
more information.
"""
__author__ = 'wan@google.com (Zhanyong Wan)'
import os
import re
try:
from sets import Set as set # For Python 2.3 compatibility
except ImportError:
pass
import sys
# We assume that this file is in the scripts/ directory in the Google
# Test root directory.
DEFAULT_GTEST_ROOT_DIR = os.path.join(os.path.dirname(__file__), '..')
# Regex for matching '#include "gtest/..."'.
INCLUDE_GTEST_FILE_REGEX = re.compile(r'^\s*#\s*include\s*"(gtest/.+)"')
# Regex for matching '#include "src/..."'.
INCLUDE_SRC_FILE_REGEX = re.compile(r'^\s*#\s*include\s*"(src/.+)"')
# Where to find the source seed files.
GTEST_H_SEED = 'include/gtest/gtest.h'
GTEST_SPI_H_SEED = 'include/gtest/gtest-spi.h'
GTEST_ALL_CC_SEED = 'src/gtest-all.cc'
# Where to put the generated files.
GTEST_H_OUTPUT = 'gtest/gtest.h'
GTEST_ALL_CC_OUTPUT = 'gtest/gtest-all.cc'
def VerifyFileExists(directory, relative_path):
"""Verifies that the given file exists; aborts on failure.
relative_path is the file path relative to the given directory.
"""
if not os.path.isfile(os.path.join(directory, relative_path)):
print('ERROR: Cannot find %s in directory %s.' % (relative_path,
directory))
print('Please either specify a valid project root directory '
'or omit it on the command line.')
sys.exit(1)
def ValidateGTestRootDir(gtest_root):
"""Makes sure gtest_root points to a valid gtest root directory.
The function aborts the program on failure.
"""
VerifyFileExists(gtest_root, GTEST_H_SEED)
VerifyFileExists(gtest_root, GTEST_ALL_CC_SEED)
def VerifyOutputFile(output_dir, relative_path):
"""Verifies that the given output file path is valid.
relative_path is relative to the output_dir directory.
"""
# Makes sure the output file either doesn't exist or can be overwritten.
output_file = os.path.join(output_dir, relative_path)
if os.path.exists(output_file):
# TODO(wan@google.com): The following user-interaction doesn't
# work with automated processes. We should provide a way for the
# Makefile to force overwriting the files.
print('%s already exists in directory %s - overwrite it? (y/N) ' %
(relative_path, output_dir))
answer = sys.stdin.readline().strip()
if answer not in ['y', 'Y']:
print('ABORTED.')
sys.exit(1)
# Makes sure the directory holding the output file exists; creates
# it and all its ancestors if necessary.
parent_directory = os.path.dirname(output_file)
if not os.path.isdir(parent_directory):
os.makedirs(parent_directory)
def ValidateOutputDir(output_dir):
"""Makes sure output_dir points to a valid output directory.
The function aborts the program on failure.
"""
VerifyOutputFile(output_dir, GTEST_H_OUTPUT)
VerifyOutputFile(output_dir, GTEST_ALL_CC_OUTPUT)
def FuseGTestH(gtest_root, output_dir):
"""Scans folder gtest_root to generate gtest/gtest.h in output_dir."""
output_file = open(os.path.join(output_dir, GTEST_H_OUTPUT), 'w')
processed_files = set() # Holds all gtest headers we've processed.
def ProcessFile(gtest_header_path):
"""Processes the given gtest header file."""
# We don't process the same header twice.
if gtest_header_path in processed_files:
return
processed_files.add(gtest_header_path)
# Reads each line in the given gtest header.
for line in open(os.path.join(gtest_root, gtest_header_path), 'r'):
m = INCLUDE_GTEST_FILE_REGEX.match(line)
if m:
# It's '#include "gtest/..."' - let's process it recursively.
ProcessFile('include/' + m.group(1))
else:
# Otherwise we copy the line unchanged to the output file.
output_file.write(line)
ProcessFile(GTEST_H_SEED)
output_file.close()
def FuseGTestAllCcToFile(gtest_root, output_file):
"""Scans folder gtest_root to generate gtest/gtest-all.cc in output_file."""
processed_files = set()
def ProcessFile(gtest_source_file):
"""Processes the given gtest source file."""
# We don't process the same #included file twice.
if gtest_source_file in processed_files:
return
processed_files.add(gtest_source_file)
# Reads each line in the given gtest source file.
for line in open(os.path.join(gtest_root, gtest_source_file), 'r'):
m = INCLUDE_GTEST_FILE_REGEX.match(line)
if m:
if 'include/' + m.group(1) == GTEST_SPI_H_SEED:
# It's '#include "gtest/gtest-spi.h"'. This file is not
# #included by "gtest/gtest.h", so we need to process it.
ProcessFile(GTEST_SPI_H_SEED)
else:
# It's '#include "gtest/foo.h"' where foo is not gtest-spi.
# We treat it as '#include "gtest/gtest.h"', as all other
# gtest headers are being fused into gtest.h and cannot be
# #included directly.
# There is no need to #include "gtest/gtest.h" more than once.
if not GTEST_H_SEED in processed_files:
processed_files.add(GTEST_H_SEED)
output_file.write('#include "%s"\n' % (GTEST_H_OUTPUT,))
else:
m = INCLUDE_SRC_FILE_REGEX.match(line)
if m:
# It's '#include "src/foo"' - let's process it recursively.
ProcessFile(m.group(1))
else:
output_file.write(line)
ProcessFile(GTEST_ALL_CC_SEED)
def FuseGTestAllCc(gtest_root, output_dir):
"""Scans folder gtest_root to generate gtest/gtest-all.cc in output_dir."""
output_file = open(os.path.join(output_dir, GTEST_ALL_CC_OUTPUT), 'w')
FuseGTestAllCcToFile(gtest_root, output_file)
output_file.close()
def FuseGTest(gtest_root, output_dir):
"""Fuses gtest.h and gtest-all.cc."""
ValidateGTestRootDir(gtest_root)
ValidateOutputDir(output_dir)
FuseGTestH(gtest_root, output_dir)
FuseGTestAllCc(gtest_root, output_dir)
def main():
argc = len(sys.argv)
if argc == 2:
# fuse_gtest_files.py OUTPUT_DIR
FuseGTest(DEFAULT_GTEST_ROOT_DIR, sys.argv[1])
elif argc == 3:
# fuse_gtest_files.py GTEST_ROOT_DIR OUTPUT_DIR
FuseGTest(sys.argv[1], sys.argv[2])
else:
print(__doc__)
sys.exit(1)
if __name__ == '__main__':
main()

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