config/create_res.py

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this
   3 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 from argparse import (
   6     Action,
   7     ArgumentParser,
   8 )
   9 import os
  10 import subprocess
  11 import sys
  12 import tempfile
  13
  14 import buildconfig
  15
  16
  17 class CPPFlag(Action):
  18     all_flags = []
  19
  20     def __call__(self, parser, namespace, values, option_string=None):
  21         if "windres" in buildconfig.substs["RC"].lower():
  22             if option_string == "-U":
  23                 return
  24             if option_string == "-I":
  25                 option_string = "--include-dir"
  26
  27         self.all_flags.extend((option_string, values))
  28
  29
  30 def generate_res():
  31     parser = ArgumentParser()
  32     parser.add_argument(
  33         "-D", action=CPPFlag, metavar="VAR[=VAL]", help="Define a variable"
  34     )
  35     parser.add_argument("-U", action=CPPFlag, metavar="VAR", help="Undefine a variable")
  36     parser.add_argument(
  37         "-I", action=CPPFlag, metavar="DIR", help="Search path for includes"
  38     )
  39     parser.add_argument("-o", dest="output", metavar="OUTPUT", help="Output file")
  40     parser.add_argument("input", help="Input file")
  41     args = parser.parse_args()
  42
  43     is_windres = "windres" in buildconfig.substs["RC"].lower()
  44
  45     verbose = os.environ.get("BUILD_VERBOSE_LOG")
  46
  47     # llvm-rc doesn't preprocess on its own, so preprocess manually
  48     # Theoretically, not windres could be rc.exe, but configure won't use it
  49     # unless you really ask for it, and it will still work with preprocessed
  50     # output.
  51     try:
  52         if not is_windres:
  53             fd, path = tempfile.mkstemp(suffix=".rc")
  54             command = buildconfig.substs["CXXCPP"] + CPPFlag.all_flags
  55             command.extend(("-DRC_INVOKED", args.input))
  56             if verbose:
  57                 print("Executing:", " ".join(command))
  58             with os.fdopen(fd, "wb") as fh:
  59                 retcode = subprocess.run(command, stdout=fh).returncode
  60                 if retcode:
  61                     # Rely on the subprocess printing out any relevant error
  62                     return retcode
  63         else:
  64             path = args.input
  65
  66         command = [buildconfig.substs["RC"]]
  67         if is_windres:
  68             command.extend(("-O", "coff"))
  69
  70         # Even though llvm-rc doesn't preprocess, we still need to pass at least
  71         # the -I flags.
  72         command.extend(CPPFlag.all_flags)
  73
  74         if args.output:
  75             if is_windres:
  76                 command.extend(("-o", args.output))
  77             else:
  78                 # Use win1252 code page for the input.
  79                 command.extend(("-c", "1252", "-Fo" + args.output))
  80
  81         command.append(path)
  82
  83         if verbose:
  84             print("Executing:", " ".join(command))
  85         retcode = subprocess.run(command).returncode
  86         if retcode:
  87             # Rely on the subprocess printing out any relevant error
  88             return retcode
  89     finally:
  90         if path != args.input:
  91             os.remove(path)
  92
  93     return 0
  94
  95
  96 if __name__ == "__main__":
  97     sys.exit(generate_res())