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