132 lines
4.5 KiB
Python
132 lines
4.5 KiB
Python
"""SCons.Tool.yacc
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Tool-specific initialization for yacc.
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There normally shouldn't be any need to import this module directly.
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It will usually be imported through the generic SCons.Tool.Tool()
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selection method.
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"""
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#
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# Copyright (c) 2001 - 2017 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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__revision__ = "src/engine/SCons/Tool/yacc.py 74b2c53bc42290e911b334a6b44f187da698a668 2017/11/14 13:16:53 bdbaddog"
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import os.path
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import SCons.Defaults
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import SCons.Tool
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import SCons.Util
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YaccAction = SCons.Action.Action("$YACCCOM", "$YACCCOMSTR")
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def _yaccEmitter(target, source, env, ysuf, hsuf):
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yaccflags = env.subst("$YACCFLAGS", target=target, source=source)
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flags = SCons.Util.CLVar(yaccflags)
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targetBase, targetExt = os.path.splitext(SCons.Util.to_String(target[0]))
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if '.ym' in ysuf: # If using Objective-C
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target = [targetBase + ".m"] # the extension is ".m".
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# If -d is specified on the command line, yacc will emit a .h
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# or .hpp file with the same name as the .c or .cpp output file.
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if '-d' in flags:
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target.append(targetBase + env.subst(hsuf, target=target, source=source))
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# If -g is specified on the command line, yacc will emit a .vcg
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# file with the same base name as the .y, .yacc, .ym or .yy file.
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if "-g" in flags:
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base, ext = os.path.splitext(SCons.Util.to_String(source[0]))
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target.append(base + env.subst("$YACCVCGFILESUFFIX"))
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# If -v is specified yacc will create the output debug file
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# which is not really source for any process, but should
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# be noted and also be cleaned
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# Bug #2558
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if "-v" in flags:
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env.SideEffect(targetBase+'.output',target[0])
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env.Clean(target[0],targetBase+'.output')
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# With --defines and --graph, the name of the file is totally defined
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# in the options.
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fileGenOptions = ["--defines=", "--graph="]
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for option in flags:
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for fileGenOption in fileGenOptions:
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l = len(fileGenOption)
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if option[:l] == fileGenOption:
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# A file generating option is present, so add the file
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# name to the list of targets.
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fileName = option[l:].strip()
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target.append(fileName)
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return (target, source)
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def yEmitter(target, source, env):
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return _yaccEmitter(target, source, env, ['.y', '.yacc'], '$YACCHFILESUFFIX')
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def ymEmitter(target, source, env):
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return _yaccEmitter(target, source, env, ['.ym'], '$YACCHFILESUFFIX')
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def yyEmitter(target, source, env):
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return _yaccEmitter(target, source, env, ['.yy'], '$YACCHXXFILESUFFIX')
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def generate(env):
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"""Add Builders and construction variables for yacc to an Environment."""
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c_file, cxx_file = SCons.Tool.createCFileBuilders(env)
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# C
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c_file.add_action('.y', YaccAction)
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c_file.add_emitter('.y', yEmitter)
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c_file.add_action('.yacc', YaccAction)
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c_file.add_emitter('.yacc', yEmitter)
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# Objective-C
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c_file.add_action('.ym', YaccAction)
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c_file.add_emitter('.ym', ymEmitter)
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# C++
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cxx_file.add_action('.yy', YaccAction)
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cxx_file.add_emitter('.yy', yyEmitter)
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env['YACC'] = env.Detect('bison') or 'yacc'
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env['YACCFLAGS'] = SCons.Util.CLVar('')
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env['YACCCOM'] = '$YACC $YACCFLAGS -o $TARGET $SOURCES'
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env['YACCHFILESUFFIX'] = '.h'
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env['YACCHXXFILESUFFIX'] = '.hpp'
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env['YACCVCGFILESUFFIX'] = '.vcg'
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def exists(env):
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return env.Detect(['bison', 'yacc'])
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# Local Variables:
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# tab-width:4
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# indent-tabs-mode:nil
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# End:
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# vim: set expandtab tabstop=4 shiftwidth=4:
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