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      1 #!/usr/bin/python
      2 #
      3 # Copyright (C) 2009 Google Inc. All rights reserved.
      4 # 
      5 # Redistribution and use in source and binary forms, with or without
      6 # modification, are permitted provided that the following conditions are
      7 # met:
      8 # 
      9 #     * Redistributions of source code must retain the above copyright
     10 # notice, this list of conditions and the following disclaimer.
     11 #     * Redistributions in binary form must reproduce the above
     12 # copyright notice, this list of conditions and the following disclaimer
     13 # in the documentation and/or other materials provided with the
     14 # distribution.
     15 #     * Neither the name of Google Inc. nor the names of its
     16 # contributors may be used to endorse or promote products derived from
     17 # this software without specific prior written permission.
     18 # 
     19 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30 #
     31 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
     32 # Use of this source code is governed by a BSD-style license that can be
     33 # found in the LICENSE file.
     34 
     35 # action_cssvaluekeywords.py is a harness script to connect actions sections of
     36 # gyp-based builds to makevalues.pl.
     37 #
     38 # usage: action_cssvaluekeywords.py OUTPUTS -- INPUTS
     39 #
     40 # Exactly two outputs must be specified: a path to each of CSSValueKeywords.c
     41 # and CSSValueKeywords.h.
     42 #
     43 # Multiple inputs may be specified. One input must have a basename of
     44 # makevalues.pl; this is taken as the path to makevalues.pl. All other inputs
     45 # are paths to .in files that are used as input to makevalues.pl; at least
     46 # one, CSSValueKeywords.in, is required.
     47 
     48 
     49 import os
     50 import posixpath
     51 import shutil
     52 import subprocess
     53 import sys
     54 
     55 
     56 def SplitArgsIntoSections(args):
     57     sections = []
     58     while len(args) > 0:
     59         if not '--' in args:
     60             # If there is no '--' left, everything remaining is an entire section.
     61             dashes = len(args)
     62         else:
     63             dashes = args.index('--')
     64 
     65         sections.append(args[:dashes])
     66 
     67         # Next time through the loop, look at everything after this '--'.
     68         if dashes + 1 == len(args):
     69             # If the '--' is at the end of the list, we won't come back through the
     70             # loop again. Add an empty section now corresponding to the nothingness
     71             # following the final '--'.
     72             args = []
     73             sections.append(args)
     74         else:
     75             args = args[dashes + 1:]
     76 
     77     return sections
     78 
     79 
     80 def main(args):
     81     (outputs, inputs) = SplitArgsIntoSections(args[1:])
     82 
     83     # Make all output pathnames absolute so that they can be accessed after
     84     # changing directory.
     85     for index in xrange(0, len(outputs)):
     86         outputs[index] = os.path.abspath(outputs[index])
     87 
     88     outputDir = os.path.dirname(outputs[0])
     89 
     90     # Look at the inputs and figure out which one is makevalues.pl and which are
     91     # inputs to that script.
     92     makevaluesInput = None
     93     inFiles = []
     94     for input in inputs:
     95         # Make input pathnames absolute so they can be accessed after changing
     96         # directory. On Windows, convert \ to / for inputs to the perl script to
     97         # work around the intermix of activepython + cygwin perl.
     98         inputAbs = os.path.abspath(input)
     99         inputAbsPosix = inputAbs.replace(os.path.sep, posixpath.sep)
    100         inputBasename = os.path.basename(input)
    101         if inputBasename == 'makevalues.pl':
    102             assert makevaluesInput == None
    103             makevaluesInput = inputAbs
    104         elif inputBasename.endswith('.in'):
    105             inFiles.append(inputAbsPosix)
    106         else:
    107             assert False
    108 
    109     assert makevaluesInput != None
    110     assert len(inFiles) >= 1
    111 
    112     # Change to the output directory because makevalues.pl puts output in its
    113     # working directory.
    114     os.chdir(outputDir)
    115 
    116     # Merge all inFiles into a single file whose name will be the same as the
    117     # first listed inFile, but in the output directory.
    118     mergedPath = os.path.basename(inFiles[0])
    119     merged = open(mergedPath, 'wb')    # 'wb' to get \n only on windows
    120 
    121     # Make sure there aren't any duplicate lines in the in files. Lowercase
    122     # everything because CSS values are case-insensitive.
    123     lineDict = {}
    124     for inFilePath in inFiles:
    125         inFile = open(inFilePath)
    126         for line in inFile:
    127             line = line.rstrip()
    128             if line.startswith('#'):
    129                 line = ''
    130             if line == '':
    131                 continue
    132             line = line.lower()
    133             if line in lineDict:
    134                 raise KeyError, 'Duplicate value %s' % line
    135             lineDict[line] = True
    136             print >>merged, line
    137         inFile.close()
    138 
    139     merged.close()
    140 
    141     # Build up the command.
    142     command = ['perl', makevaluesInput]
    143 
    144     # Do it. checkCall is new in 2.5, so simulate its behavior with call and
    145     # assert.
    146     returnCode = subprocess.call(command)
    147     assert returnCode == 0
    148 
    149     # Don't leave behind the merged file or the .gperf file created by
    150     # makevalues.
    151     (root, ext) = os.path.splitext(mergedPath)
    152     gperfPath = root + '.gperf'
    153     os.unlink(gperfPath)
    154     os.unlink(mergedPath)
    155 
    156     # Go through the outputs. Any output that belongs in a different directory
    157     # is moved. Do a copy and delete instead of rename for maximum portability.
    158     # Note that all paths used in this section are still absolute.
    159     for output in outputs:
    160         thisOutputDir = os.path.dirname(output)
    161         if thisOutputDir != outputDir:
    162             outputBasename = os.path.basename(output)
    163             src = os.path.join(outputDir, outputBasename)
    164             dst = os.path.join(thisOutputDir, outputBasename)
    165             shutil.copyfile(src, dst)
    166             os.unlink(src)
    167 
    168     return returnCode
    169 
    170 
    171 if __name__ == '__main__':
    172     sys.exit(main(sys.argv))
    173