source: waflib/Tools/flex.py @ 904702d

#! /usr/bin/env python
# encoding: utf-8
# WARNING! Do not edit! http://waf.googlecode.com/git/docs/wafbook/single.html#_obtaining_the_waf_file

import waflib.TaskGen,os,re
def decide_ext(self,node):
        if'cxx'in self.features:
                return['.lex.cc']
        return['.lex.c']
def flexfun(tsk):
        env=tsk.env
        bld=tsk.generator.bld
        wd=bld.variant_dir
        def to_list(xx):
                if isinstance(xx,str):return[xx]
                return xx
        tsk.last_cmd=lst=[]
        lst.extend(to_list(env['FLEX']))
        lst.extend(to_list(env['FLEXFLAGS']))
        inputs=[a.path_from(bld.bldnode)for a in tsk.inputs]
        if env.FLEX_MSYS:
                inputs=[x.replace(os.sep,'/')for x in inputs]
        lst.extend(inputs)
        lst=[x for x in lst if x]
        txt=bld.cmd_and_log(lst,cwd=wd,env=env.env or None,quiet=0)
        tsk.outputs[0].write(txt.replace('\r\n','\n').replace('\r','\n'))
waflib.TaskGen.declare_chain(name='flex',rule=flexfun,ext_in='.l',decider=decide_ext,)
def configure(conf):
        conf.find_program('flex',var='FLEX')
        conf.env.FLEXFLAGS=['-t']
        if re.search(r"\\msys\\[0-9.]+\\bin\\flex.exe$",conf.env.FLEX[0]):
                conf.env.FLEX_MSYS=True