| #!/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 either XPathGrammar.y. |
| # OUTPUT_DIR is where the bison-generated .cpp and .h files should be placed. |
| |
| import errno |
| import os |
| import os.path |
| import subprocess |
| import sys |
| |
| assert len(sys.argv) == 3 or len(sys.argv) == 4 |
| |
| inputFile = sys.argv[1] |
| outputDir = sys.argv[2] |
| bisonExe = 'bison' |
| if len(sys.argv) > 3: |
| bisonExe = sys.argv[3] |
| |
| pathToBison = os.path.split(bisonExe)[0] |
| if pathToBison: |
| # 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'] = pathToBison + os.pathsep + os.environ['PATH'] |
| |
| inputName = os.path.basename(inputFile) |
| assert inputName == 'XPathGrammar.y' |
| prefix = {'XPathGrammar.y': 'xpathyy'}[inputName] |
| |
| (inputRoot, inputExt) = os.path.splitext(inputName) |
| |
| # The generated .h will be in a different location depending on the bison |
| # version. |
| outputHTries = [ |
| os.path.join(outputDir, inputRoot + '.cpp.h'), |
| os.path.join(outputDir, inputRoot + '.hpp'), |
| ] |
| |
| for outputHTry in outputHTries: |
| try: |
| os.unlink(outputHTry) |
| except OSError, e: |
| if e.errno != errno.ENOENT: |
| raise |
| |
| outputCpp = os.path.join(outputDir, inputRoot + '.cpp') |
| |
| returnCode = subprocess.call([bisonExe, '-d', '-p', prefix, inputFile, '-o', outputCpp]) |
| assert returnCode == 0 |
| |
| # Find the name that bison used for the generated header file. |
| outputHTmp = None |
| for outputHTry in outputHTries: |
| try: |
| os.stat(outputHTry) |
| outputHTmp = outputHTry |
| break |
| except OSError, e: |
| if e.errno != errno.ENOENT: |
| raise |
| |
| assert outputHTmp != None |
| |
| # Read the header file in under the generated name and remove it. |
| outputHFile = open(outputHTmp) |
| outputHContents = outputHFile.read() |
| outputHFile.close() |
| os.unlink(outputHTmp) |
| |
| # Rewrite the generated header with #include guards. |
| outputH = os.path.join(outputDir, inputRoot + '.h') |
| |
| outputHFile = open(outputH, 'w') |
| print >>outputHFile, '#ifndef %sH' % inputRoot |
| print >>outputHFile, '#define %sH' % inputRoot |
| print >>outputHFile, outputHContents |
| print >>outputHFile, '#endif' |
| outputHFile.close() |