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      1 # Copyright (C) 2013 Google Inc. All rights reserved.
      2 #
      3 # Redistribution and use in source and binary forms, with or without
      4 # modification, are permitted provided that the following conditions are
      5 # met:
      6 #
      7 #     * Redistributions of source code must retain the above copyright
      8 # notice, this list of conditions and the following disclaimer.
      9 #     * Redistributions in binary form must reproduce the above
     10 # copyright notice, this list of conditions and the following disclaimer
     11 # in the documentation and/or other materials provided with the
     12 # distribution.
     13 #     * Neither the name of Google Inc. nor the names of its
     14 # contributors may be used to endorse or promote products derived from
     15 # this software without specific prior written permission.
     16 #
     17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     22 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28 
     29 import os.path
     30 import shlex
     31 import shutil
     32 import optparse
     33 
     34 from in_file import InFile
     35 
     36 
     37 class Writer(object):
     38     # Subclasses should override.
     39     class_name = None
     40     defaults = None
     41     valid_values = None
     42     default_parameters = None
     43 
     44     def __init__(self, in_files):
     45         if isinstance(in_files, basestring):
     46             in_files = [in_files]
     47         if in_files:
     48             self.in_file = InFile.load_from_files(in_files, self.defaults, self.valid_values, self.default_parameters)
     49         else:
     50             self.in_file = None
     51         self._outputs = {}  # file_name -> generator
     52 
     53     def wrap_with_condition(self, string, condition):
     54         if not condition:
     55             return string
     56         return "#if ENABLE(%(condition)s)\n%(string)s\n#endif" % { 'condition' : condition, 'string' : string }
     57 
     58     def _forcibly_create_text_file_at_path_with_contents(self, file_path, contents):
     59         # FIXME: This method can be made less force-full anytime after 6/1/2013.
     60         # A gyp error was briefly checked into the tree, causing
     61         # a directory to have been generated in place of one of
     62         # our output files.  Clean up after that error so that
     63         # all users don't need to clobber their output directories.
     64         shutil.rmtree(file_path, ignore_errors=True)
     65         # The build system should ensure our output directory exists, but just in case.
     66         directory = os.path.dirname(file_path)
     67         if not os.path.exists(directory):
     68             os.makedirs(directory)
     69 
     70         with open(file_path, "w") as file_to_write:
     71             file_to_write.write(contents)
     72 
     73     def _write_file(self, output_dir, contents, file_name):
     74         path = os.path.join(output_dir, file_name)
     75         self._forcibly_create_text_file_at_path_with_contents(path, contents)
     76 
     77     def write_files(self, output_dir):
     78         for file_name, generator in self._outputs.items():
     79             self._write_file(output_dir, generator(), file_name)
     80 
     81     def set_gperf_path(self, gperf_path):
     82         self.gperf_path = gperf_path
     83 
     84 
     85 class Maker(object):
     86     def __init__(self, writer_class):
     87         self._writer_class = writer_class
     88 
     89     def main(self, argv):
     90         script_name = os.path.basename(argv[0])
     91         args = argv[1:]
     92         if len(args) < 1:
     93             print "USAGE: %s INPUT_FILES" % script_name
     94             exit(1)
     95 
     96         parser = optparse.OptionParser()
     97         parser.add_option("--defines")
     98         parser.add_option("--gperf", default="gperf")
     99         parser.add_option("--output_dir", default=os.getcwd())
    100         options, args = parser.parse_args()
    101 
    102         writer = self._writer_class(args)
    103         writer.set_gperf_path(options.gperf)
    104         writer.write_files(options.output_dir)
    105