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63 lines
1.5 KiB
Python
63 lines
1.5 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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# John O'Meara, 2006
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# Thomas Nagy, 2006-2018 (ita)
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"""
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The **flex** program is a code generator which creates C or C++ files.
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The generated files are compiled into object files.
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"""
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import os, re
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from waflib import Task, TaskGen
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from waflib.Tools import ccroot
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def decide_ext(self, node):
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if 'cxx' in self.features:
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return ['.lex.cc']
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return ['.lex.c']
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def flexfun(tsk):
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env = tsk.env
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bld = tsk.generator.bld
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wd = bld.variant_dir
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def to_list(xx):
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if isinstance(xx, str):
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return [xx]
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return xx
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tsk.last_cmd = lst = []
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lst.extend(to_list(env.FLEX))
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lst.extend(to_list(env.FLEXFLAGS))
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inputs = [a.path_from(tsk.get_cwd()) for a in tsk.inputs]
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if env.FLEX_MSYS:
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inputs = [x.replace(os.sep, '/') for x in inputs]
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lst.extend(inputs)
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lst = [x for x in lst if x]
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txt = bld.cmd_and_log(lst, cwd=wd, env=env.env or None, quiet=0)
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tsk.outputs[0].write(txt.replace('\r\n', '\n').replace('\r', '\n')) # issue #1207
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TaskGen.declare_chain(
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name = 'flex',
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rule = flexfun, # issue #854
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ext_in = '.l',
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decider = decide_ext,
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)
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# To support the following:
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# bld(features='c', flexflags='-P/foo')
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Task.classes['flex'].vars = ['FLEXFLAGS', 'FLEX']
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ccroot.USELIB_VARS['c'].add('FLEXFLAGS')
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ccroot.USELIB_VARS['cxx'].add('FLEXFLAGS')
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def configure(conf):
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"""
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Detect the *flex* program
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"""
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conf.find_program('flex', var='FLEX')
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conf.env.FLEXFLAGS = ['-t']
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if re.search (r"\\msys\\[0-9.]+\\bin\\flex.exe$", conf.env.FLEX[0]):
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# this is the flex shipped with MSYS
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conf.env.FLEX_MSYS = True
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