WebKit IDL roll.

third_party/WebCore/WebCore.gyp/scripts/rule_bison.py

+#!/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 CSSGrammar.y or 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]
+
+inputName = os.path.basename(inputFile)
+assert inputName == 'CSSGrammar.y' or inputName == 'XPathGrammar.y'
+prefix = {'CSSGrammar.y': 'cssyy', '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()