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-rw-r--r--Tools/flex.py62
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-#!/usr/bin/env python
-# encoding: utf-8
-# John O'Meara, 2006
-# Thomas Nagy, 2006-2018 (ita)
-
-"""
-The **flex** program is a code generator which creates C or C++ files.
-The generated files are compiled into object files.
-"""
-
-import os, re
-from waflib import Task, TaskGen
-from waflib.Tools import ccroot
-
-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(tsk.get_cwd()) 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')) # issue #1207
-
-TaskGen.declare_chain(
- name = 'flex',
- rule = flexfun, # issue #854
- ext_in = '.l',
- decider = decide_ext,
-)
-
-# To support the following:
-# bld(features='c', flexflags='-P/foo')
-Task.classes['flex'].vars = ['FLEXFLAGS', 'FLEX']
-ccroot.USELIB_VARS['c'].add('FLEXFLAGS')
-ccroot.USELIB_VARS['cxx'].add('FLEXFLAGS')
-
-def configure(conf):
- """
- Detect the *flex* program
- """
- conf.find_program('flex', var='FLEX')
- conf.env.FLEXFLAGS = ['-t']
-
- if re.search (r"\\msys\\[0-9.]+\\bin\\flex.exe$", conf.env.FLEX[0]):
- # this is the flex shipped with MSYS
- conf.env.FLEX_MSYS = True
-