| #!/usr/bin/python |
| # |
| # Copyright (C) 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. |
| # |
| # Copyright (c) 2009 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. |
| |
| # usage: rule_bison.py INPUT_FILE OUTPUT_DIR BISON_EXE |
| # INPUT_FILE is a path to *.y such as xpath_grammar.y. |
| # OUTPUT_DIR is where the bison-generated .cc and .h files should be placed. |
| |
| import errno |
| import os |
| import os.path |
| import subprocess |
| import sys |
| |
| from blinkbuild.name_style_converter import NameStyleConverter |
| |
| |
| def modify_file(path, prefix_lines, suffix_lines, replace_list=[]): |
| prefix_lines = map(lambda s: s + '\n', prefix_lines) |
| suffix_lines = map(lambda s: s + '\n', suffix_lines) |
| with open(path, 'r') as f: |
| old_lines = f.readlines() |
| for i in range(len(old_lines)): |
| for src, dest in replace_list: |
| old_lines[i] = old_lines[i].replace(src, dest) |
| new_lines = prefix_lines + old_lines + suffix_lines |
| with open(path, 'w') as f: |
| f.writelines(new_lines) |
| |
| |
| def main(): |
| assert len(sys.argv) == 4 |
| |
| input_file = sys.argv[1] |
| output_dir = sys.argv[2] |
| bison_exe = sys.argv[3] |
| |
| path_to_bison = os.path.split(bison_exe)[0] |
| if path_to_bison: |
| # Make sure this path is in the path so that it can find its auxiliary |
| # binaries (in particular, m4). To avoid other 'm4's being found, insert |
| # at head, rather than tail. |
| os.environ['PATH'] = path_to_bison + os.pathsep + os.environ['PATH'] |
| |
| input_name = os.path.basename(input_file) |
| |
| # Output name without directory and extension. |
| output_basename = os.path.splitext(input_name)[0] + '_generated' |
| |
| output_cc = os.path.join(output_dir, output_basename + '.cc') |
| BISON_HEADER_EXT = '.hh' |
| original_output_h = os.path.join(output_dir, |
| output_basename + BISON_HEADER_EXT) |
| |
| return_code = subprocess.call( |
| [bison_exe, '-d', input_file, '-o', output_cc]) |
| assert return_code == 0 |
| # If the file doesn't exist, this raise an OSError. |
| os.stat(original_output_h) |
| |
| # The generated files contain references to the original "foo.hh" for |
| # #include and #line. We replace them with "foo.h". |
| common_replace_list = [(output_basename + BISON_HEADER_EXT, |
| output_basename + '.h')] |
| |
| # Rewrite the generated header with #include guards. |
| CLANG_FORMAT_DISABLE_LINE = "// clang-format off" |
| output_h = os.path.join(output_dir, output_basename + '.h') |
| header_guard = NameStyleConverter(output_h).to_header_guard() |
| modify_file( |
| original_output_h, [ |
| CLANG_FORMAT_DISABLE_LINE, |
| '#ifndef %s' % header_guard, |
| '#define %s' % header_guard |
| ], ['#endif // %s' % header_guard], |
| replace_list=common_replace_list) |
| os.rename(original_output_h, output_h) |
| |
| modify_file( |
| output_cc, [CLANG_FORMAT_DISABLE_LINE], [], |
| replace_list=common_replace_list) |
| |
| |
| if __name__ == '__main__': |
| main() |