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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 # usage: rule_binding.py INPUT CPPDIR HDIR -- INPUTS -- OPTIONS
     36 #
     37 # INPUT is an IDL file, such as Whatever.idl.
     38 #
     39 # CPPDIR is the directory into which V8Whatever.cpp will be placed. HDIR is
     40 # the directory into which V8Whatever.h will be placed.
     41 #
     42 # The first item in INPUTS is the path to generate-bindings.pl. Remaining
     43 # items in INPUTS are used to build the Perl module include path.
     44 #
     45 # OPTIONS are passed as-is to generate-bindings.pl as additional arguments.
     46 
     47 
     48 import errno
     49 import os
     50 import shlex
     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     sections = SplitArgsIntoSections(args[1:])
     82     assert len(sections) == 3, sections
     83     (base, inputs, options) = sections
     84 
     85     assert len(base) == 3, base
     86     (input, cppdir, hdir) = base
     87 
     88     assert len(inputs) > 1, inputs
     89     generateBindings = inputs[0]
     90     perlModules = inputs[1:]
     91 
     92     includeDirs = []
     93     for perlModule in perlModules:
     94         includeDir = os.path.dirname(perlModule)
     95         if not includeDir in includeDirs:
     96             includeDirs.append(includeDir)
     97 
     98     # The defines come in as one flat string. Split it up into distinct arguments.
     99     if '--defines' in options:
    100         definesIndex = options.index('--defines')
    101         if definesIndex + 1 < len(options):
    102             splitOptions = shlex.split(options[definesIndex + 1])
    103             if splitOptions:
    104                 options[definesIndex + 1] = ' '.join(splitOptions)
    105 
    106     # Build up the command.
    107     command = ['perl', '-w']
    108     for includeDir in includeDirs:
    109         command.extend(['-I', includeDir])
    110     command.append(generateBindings)
    111     command.extend(options)
    112     command.extend(['--outputDir', cppdir, input])
    113 
    114     # Do it. check_call is new in 2.5, so simulate its behavior with call and
    115     # assert.
    116     returnCode = subprocess.call(command)
    117     assert returnCode == 0
    118 
    119     # Both the .cpp and .h were generated in cppdir, but if hdir is different,
    120     # the .h needs to move. Copy it instead of using os.rename for maximum
    121     # portability in all cases.
    122     if cppdir != hdir:
    123         inputBasename = os.path.basename(input)
    124         (root, ext) = os.path.splitext(inputBasename)
    125         hname = 'V8%s.h' % root
    126         hsrc = os.path.join(cppdir, hname)
    127         hdst = os.path.join(hdir, hname)
    128         shutil.copyfile(hsrc, hdst)
    129         os.unlink(hsrc)
    130 
    131     return returnCode
    132 
    133 
    134 if __name__ == '__main__':
    135     sys.exit(main(sys.argv))
    136