1 files changed, 38 insertions, 0 deletions
diff --git a/waflib/Tools/flex.py b/waflib/Tools/flex.py
new file mode 100644
index 0000000..1f1620e
--- /dev/null
+++ b/waflib/Tools/flex.py
@@ -0,0 +1,38 @@
+#! /usr/bin/env python
+# encoding: utf-8
+# WARNING! Do not edit! https://waf.io/book/index.html#_obtaining_the_waf_file
+
+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'))
+TaskGen.declare_chain(name='flex',rule=flexfun,ext_in='.l',decider=decide_ext,)
+Task.classes['flex'].vars=['FLEXFLAGS','FLEX']
+ccroot.USELIB_VARS['c'].add('FLEXFLAGS')
+ccroot.USELIB_VARS['cxx'].add('FLEXFLAGS')
+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