mirror of
https://github.com/klzgrad/naiveproxy.git
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96 lines
3.1 KiB
Python
96 lines
3.1 KiB
Python
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#!/usr/bin/env python
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# Copyright 2015 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# This writes headers for build flags. See buildflag_header.gni for usage of
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# this system as a whole.
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#
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# The parameters are passed in a response file so we don't have to worry
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# about command line lengths. The name of the response file is passed on the
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# command line.
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#
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# The format of the response file is:
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# [--flags <list of one or more flag values>]
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import optparse
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import os
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import shlex
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import sys
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class Options:
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def __init__(self, output, rulename, header_guard, flags):
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self.output = output
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self.rulename = rulename
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self.header_guard = header_guard
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self.flags = flags
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def GetOptions():
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parser = optparse.OptionParser()
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parser.add_option('--output', help="Output header name inside --gen-dir.")
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parser.add_option('--rulename',
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help="Helpful name of build rule for including in the " +
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"comment at the top of the file.")
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parser.add_option('--gen-dir',
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help="Path to root of generated file directory tree.")
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parser.add_option('--definitions',
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help="Name of the response file containing the flags.")
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cmdline_options, cmdline_flags = parser.parse_args()
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# Compute header guard by replacing some chars with _ and upper-casing.
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header_guard = cmdline_options.output.upper()
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header_guard = \
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header_guard.replace('/', '_').replace('\\', '_').replace('.', '_')
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header_guard += '_'
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# The actual output file is inside the gen dir.
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output = os.path.join(cmdline_options.gen_dir, cmdline_options.output)
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# Definition file in GYP is newline separated, in GN they are shell formatted.
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# shlex can parse both of these.
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with open(cmdline_options.definitions, 'r') as def_file:
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defs = shlex.split(def_file.read())
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flags_index = defs.index('--flags')
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# Everything after --flags are flags. true/false are remapped to 1/0,
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# everything else is passed through.
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flags = []
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for flag in defs[flags_index + 1 :]:
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equals_index = flag.index('=')
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key = flag[:equals_index]
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value = flag[equals_index + 1:]
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# Canonicalize and validate the value.
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if value == 'true':
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value = '1'
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elif value == 'false':
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value = '0'
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flags.append((key, str(value)))
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return Options(output=output,
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rulename=cmdline_options.rulename,
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header_guard=header_guard,
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flags=flags)
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def WriteHeader(options):
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with open(options.output, 'w') as output_file:
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output_file.write("// Generated by build/write_buildflag_header.py\n")
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if options.rulename:
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output_file.write('// From "' + options.rulename + '"\n')
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output_file.write('\n#ifndef %s\n' % options.header_guard)
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output_file.write('#define %s\n\n' % options.header_guard)
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output_file.write('#include "build/buildflag.h"\n\n')
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for pair in options.flags:
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output_file.write('#define BUILDFLAG_INTERNAL_%s() (%s)\n' % pair)
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output_file.write('\n#endif // %s\n' % options.header_guard)
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options = GetOptions()
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WriteHeader(options)
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