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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 (c) 2001 - 2019 The SCons Foundation
#
# 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__ = "src/engine/SCons/Tool/yacc.py bee7caf9defd6e108fc2998a2520ddb36a967691 2019-12-17 02:07:09 bdeegan"
import os.path
import sys
import SCons.Defaults
import SCons.Tool
import SCons.Util
from SCons.Platform.mingw import MINGW_DEFAULT_PATHS
from SCons.Platform.cygwin import CYGWIN_DEFAULT_PATHS
from SCons.Platform.win32 import CHOCO_DEFAULT_PATH
YaccAction = SCons.Action.Action("$YACCCOM", "$YACCCOMSTR")
if sys.platform == 'win32':
BINS = ['bison', 'yacc', 'win_bison']
else:
BINS = ["bison", "yacc"]
def _yaccEmitter(target, source, env, ysuf, hsuf):
yaccflags = env.subst("$YACCFLAGS", target=target, source=source)
flags = SCons.Util.CLVar(yaccflags)
targetBase, targetExt = os.path.splitext(SCons.Util.to_String(target[0]))
if '.ym' in ysuf: # If using Objective-C
target = [targetBase + ".m"] # the extension is ".m".
# If -d is specified on the command line, yacc will emit a .h
# or .hpp file with the same name as the .c or .cpp output file.
if '-d' in flags:
target.append(targetBase + env.subst(hsuf, target=target, source=source))
# If -g is specified on the command line, yacc will emit a .vcg
# file with the same base name as the .y, .yacc, .ym or .yy file.
if "-g" in flags:
base, ext = os.path.splitext(SCons.Util.to_String(source[0]))
target.append(base + env.subst("$YACCVCGFILESUFFIX"))
# If -v is specified yacc will create the output debug file
# which is not really source for any process, but should
# be noted and also be cleaned
# Bug #2558
if "-v" in flags:
env.SideEffect(targetBase+'.output',target[0])
env.Clean(target[0],targetBase+'.output')
# 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 = option[l:].strip()
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'], '$YACCHXXFILESUFFIX')
def get_yacc_path(env, append_paths=False):
"""
Find the path to the yacc tool, searching several possible names
Only called in the Windows case, so the default_path
can be Windows-specific
:param env: current construction environment
:param append_paths: if set, add the path to the tool to PATH
:return: path to yacc tool, if found
"""
for prog in BINS:
bin_path = SCons.Tool.find_program_path(
env,
prog,
default_paths=CHOCO_DEFAULT_PATH + MINGW_DEFAULT_PATHS + CYGWIN_DEFAULT_PATHS )
if bin_path:
if append_paths:
env.AppendENVPath('PATH', os.path.dirname(bin_path))
return bin_path
SCons.Warnings.Warning('yacc tool requested, but yacc or bison binary not found in ENV PATH')
def generate(env):
"""Add Builders and construction variables for yacc to an Environment."""
c_file, cxx_file = SCons.Tool.createCFileBuilders(env)
# C
c_file.add_action('.y', YaccAction)
c_file.add_emitter('.y', yEmitter)
c_file.add_action('.yacc', YaccAction)
c_file.add_emitter('.yacc', yEmitter)
# Objective-C
c_file.add_action('.ym', YaccAction)
c_file.add_emitter('.ym', ymEmitter)
# C++
cxx_file.add_action('.yy', YaccAction)
cxx_file.add_emitter('.yy', yyEmitter)
if sys.platform == 'win32':
# ignore the return, all we need is for the path to be added
_ = get_yacc_path(env, append_paths=True)
env["YACC"] = env.Detect(BINS)
env['YACCFLAGS'] = SCons.Util.CLVar('')
env['YACCCOM'] = '$YACC $YACCFLAGS -o $TARGET $SOURCES'
env['YACCHFILESUFFIX'] = '.h'
env['YACCHXXFILESUFFIX'] = '.hpp'
env['YACCVCGFILESUFFIX'] = '.vcg'
def exists(env):
if sys.platform == 'win32':
return get_yacc_path(env)
else:
return env.Detect(BINS)
# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4:
|
