#! /usr/bin/env python
# encoding: utf-8
# WARNING! Do not edit! https://waf.io/book/index.html#_obtaining_the_waf_file

import os,re,sys,tempfile,traceback
from waflib import Utils,Logs,Errors
NOT_RUN=0
MISSING=1
CRASHED=2
EXCEPTION=3
CANCELED=4
SKIPPED=8
SUCCESS=9
ASK_LATER=-1
SKIP_ME=-2
RUN_ME=-3
CANCEL_ME=-4
COMPILE_TEMPLATE_SHELL='''
def f(tsk):
	env = tsk.env
	gen = tsk.generator
	bld = gen.bld
	cwdx = tsk.get_cwd()
	p = env.get_flat
	def to_list(xx):
		if isinstance(xx, str): return [xx]
		return xx
	tsk.last_cmd = cmd = \'\'\' %s \'\'\' % s
	return tsk.exec_command(cmd, cwd=cwdx, env=env.env or None)
'''
COMPILE_TEMPLATE_NOSHELL='''
def f(tsk):
	env = tsk.env
	gen = tsk.generator
	bld = gen.bld
	cwdx = tsk.get_cwd()
	def to_list(xx):
		if isinstance(xx, str): return [xx]
		return xx
	def merge(lst1, lst2):
		if lst1 and lst2:
			return lst1[:-1] + [lst1[-1] + lst2[0]] + lst2[1:]
		return lst1 + lst2
	lst = []
	%s
	if '' in lst:
		lst = [x for x in lst if x]
	tsk.last_cmd = lst
	return tsk.exec_command(lst, cwd=cwdx, env=env.env or None)
'''
COMPILE_TEMPLATE_SIG_VARS='''
def f(tsk):
	sig = tsk.generator.bld.hash_env_vars(tsk.env, tsk.vars)
	tsk.m.update(sig)
	env = tsk.env
	gen = tsk.generator
	bld = gen.bld
	cwdx = tsk.get_cwd()
	p = env.get_flat
	buf = []
	%s
	tsk.m.update(repr(buf).encode())
'''
classes={}
class store_task_type(type):
	def __init__(cls,name,bases,dict):
		super(store_task_type,cls).__init__(name,bases,dict)
		name=cls.__name__
		if name!='Task':
			if getattr(cls,'run_str',None):
				(f,dvars)=compile_fun(cls.run_str,cls.shell)
				cls.hcode=Utils.h_cmd(cls.run_str)
				cls.orig_run_str=cls.run_str
				cls.run_str=None
				cls.run=f
				cls.vars=list(set(cls.vars+dvars))
				cls.vars.sort()
				if cls.vars:
					fun=compile_sig_vars(cls.vars)
					if fun:
						cls.sig_vars=fun
			elif getattr(cls,'run',None)and not'hcode'in cls.__dict__:
				cls.hcode=Utils.h_cmd(cls.run)
			getattr(cls,'register',classes)[name]=cls
class Task(metaclass=store_task_type):
	vars=[]
	always_run=False
	shell=False
	color='GREEN'
	ext_in=[]
	ext_out=[]
	before=[]
	after=[]
	hcode=Utils.SIG_NIL
	keep_last_cmd=False
	weight=0
	tree_weight=0
	prio_order=0
	__slots__=('hasrun','generator','env','inputs','outputs','dep_nodes','run_after')
	def __init__(self,*k,**kw):
		self.hasrun=NOT_RUN
		try:
			self.generator=kw['generator']
		except KeyError:
			self.generator=self
		self.env=kw['env']
		self.inputs=[]
		self.outputs=[]
		self.dep_nodes=[]
		self.run_after=set()
	def __lt__(self,other):
		return self.priority()>other.priority()
	def __le__(self,other):
		return self.priority()>=other.priority()
	def __gt__(self,other):
		return self.priority()<other.priority()
	def __ge__(self,other):
		return self.priority()<=other.priority()
	def get_cwd(self):
		bld=self.generator.bld
		ret=getattr(self,'cwd',None)or getattr(bld,'cwd',bld.bldnode)
		if isinstance(ret,str):
			if os.path.isabs(ret):
				ret=bld.root.make_node(ret)
			else:
				ret=self.generator.path.make_node(ret)
		return ret
	def quote_flag(self,x):
		old=x
		if'\\'in x:
			x=x.replace('\\','\\\\')
		if'"'in x:
			x=x.replace('"','\\"')
		if old!=x or' 'in x or'\t'in x or"'"in x:
			x='"%s"'%x
		return x
	def priority(self):
		return(self.weight+self.prio_order,-getattr(self.generator,'tg_idx_count',0))
	def split_argfile(self,cmd):
		return([cmd[0]],[self.quote_flag(x)for x in cmd[1:]])
	def exec_command(self,cmd,**kw):
		if not'cwd'in kw:
			kw['cwd']=self.get_cwd()
		if hasattr(self,'timeout'):
			kw['timeout']=self.timeout
		if self.env.PATH:
			env=kw['env']=dict(kw.get('env')or self.env.env or os.environ)
			env['PATH']=self.env.PATH if isinstance(self.env.PATH,str)else os.pathsep.join(self.env.PATH)
		if hasattr(self,'stdout'):
			kw['stdout']=self.stdout
		if hasattr(self,'stderr'):
			kw['stderr']=self.stderr
		if not isinstance(cmd,str):
			if Utils.is_win32:
				too_long=sum([len(arg)for arg in cmd])+len(cmd)>8192
			else:
				too_long=len(cmd)>200000
			if too_long and getattr(self,'allow_argsfile',True):
				cmd,args=self.split_argfile(cmd)
				try:
					(fd,tmp)=tempfile.mkstemp()
					os.write(fd,'\r\n'.join(args).encode())
					os.close(fd)
					if Logs.verbose:
						Logs.debug('argfile: @%r -> %r',tmp,args)
					return self.generator.bld.exec_command(cmd+['@'+tmp],**kw)
				finally:
					try:
						os.remove(tmp)
					except OSError:
						pass
		return self.generator.bld.exec_command(cmd,**kw)
	def process(self):
		try:
			del self.generator.bld.task_sigs[self.uid()]
		except KeyError:
			pass
		try:
			ret=self.run()
		except Exception:
			self.err_msg=traceback.format_exc()
			self.hasrun=EXCEPTION
		else:
			if ret:
				self.err_code=ret
				self.hasrun=CRASHED
			else:
				try:
					self.post_run()
				except Errors.WafError:
					pass
				except Exception:
					self.err_msg=traceback.format_exc()
					self.hasrun=EXCEPTION
				else:
					self.hasrun=SUCCESS
		if self.hasrun!=SUCCESS and self.scan:
			try:
				del self.generator.bld.imp_sigs[self.uid()]
			except KeyError:
				pass
	def log_display(self,bld):
		if self.generator.bld.progress_bar==3:
			return
		s=self.display()
		if s:
			if bld.logger:
				logger=bld.logger
			else:
				logger=Logs
			if self.generator.bld.progress_bar==1:
				c1=Logs.colors.cursor_off
				c2=Logs.colors.cursor_on
				logger.info(s,extra={'stream':sys.stderr,'terminator':'','c1':c1,'c2':c2})
			else:
				logger.info(s,extra={'terminator':'','c1':'','c2':''})
	def display(self):
		col1=Logs.colors(self.color)
		col2=Logs.colors.NORMAL
		master=self.generator.bld.producer
		def cur():
			return master.processed-master.ready.qsize()
		if self.generator.bld.progress_bar==1:
			return self.generator.bld.progress_line(cur(),master.total,col1,col2)
		if self.generator.bld.progress_bar==2:
			ela=str(self.generator.bld.timer)
			try:
				ins=','.join([n.name for n in self.inputs])
			except AttributeError:
				ins=''
			try:
				outs=','.join([n.name for n in self.outputs])
			except AttributeError:
				outs=''
			return'|Total %s|Current %s|Inputs %s|Outputs %s|Time %s|\n'%(master.total,cur(),ins,outs,ela)
		s=str(self)
		if not s:
			return None
		total=master.total
		n=len(str(total))
		fs='[%%%dd/%%%dd] %%s%%s%%s%%s\n'%(n,n)
		kw=self.keyword()
		if kw:
			kw+=' '
		return fs%(cur(),total,kw,col1,s,col2)
	def hash_constraints(self):
		return(tuple(self.before),tuple(self.after),tuple(self.ext_in),tuple(self.ext_out),self.__class__.__name__,self.hcode)
	def format_error(self):
		if Logs.verbose:
			msg=': %r\n%r'%(self,getattr(self,'last_cmd',''))
		else:
			msg=' (run with -v to display more information)'
		name=getattr(self.generator,'name','')
		if getattr(self,"err_msg",None):
			return self.err_msg
		elif not self.hasrun:
			return'task in %r was not executed for some reason: %r'%(name,self)
		elif self.hasrun==CRASHED:
			try:
				return' -> task in %r failed with exit status %r%s'%(name,self.err_code,msg)
			except AttributeError:
				return' -> task in %r failed%s'%(name,msg)
		elif self.hasrun==MISSING:
			return' -> missing files in %r%s'%(name,msg)
		elif self.hasrun==CANCELED:
			return' -> %r canceled because of missing dependencies'%name
		else:
			return'invalid status for task in %r: %r'%(name,self.hasrun)
	def colon(self,var1,var2):
		tmp=self.env[var1]
		if not tmp:
			return[]
		if isinstance(var2,str):
			it=self.env[var2]
		else:
			it=var2
		if isinstance(tmp,str):
			return[tmp%x for x in it]
		else:
			lst=[]
			for y in it:
				lst.extend(tmp)
				lst.append(y)
			return lst
	def __str__(self):
		name=self.__class__.__name__
		if self.outputs:
			if name.endswith(('lib','program'))or not self.inputs:
				node=self.outputs[0]
				return node.path_from(node.ctx.launch_node())
		if not(self.inputs or self.outputs):
			return self.__class__.__name__
		if len(self.inputs)==1:
			node=self.inputs[0]
			return node.path_from(node.ctx.launch_node())
		src_str=' '.join([a.path_from(a.ctx.launch_node())for a in self.inputs])
		tgt_str=' '.join([a.path_from(a.ctx.launch_node())for a in self.outputs])
		if self.outputs:
			sep=' -> '
		else:
			sep=''
		return'%s: %s%s%s'%(self.__class__.__name__,src_str,sep,tgt_str)
	def keyword(self):
		name=self.__class__.__name__
		if name.endswith(('lib','program')):
			return'Linking'
		if len(self.inputs)==1 and len(self.outputs)==1:
			return'Compiling'
		if not self.inputs:
			if self.outputs:
				return'Creating'
			else:
				return'Running'
		return'Processing'
	def __repr__(self):
		try:
			ins=",".join([x.name for x in self.inputs])
			outs=",".join([x.name for x in self.outputs])
		except AttributeError:
			ins=",".join([str(x)for x in self.inputs])
			outs=",".join([str(x)for x in self.outputs])
		return"".join(['\n\t{task %r: '%id(self),self.__class__.__name__," ",ins," -> ",outs,'}'])
	def uid(self):
		try:
			return self.uid_
		except AttributeError:
			m=Utils.md5(self.__class__.__name__,usedforsecurity=False)
			up=m.update
			for x in self.inputs+self.outputs:
				up(x.abspath())
			self.uid_=m.digest()
			return self.uid_
	def set_inputs(self,inp):
		if isinstance(inp,list):
			self.inputs+=inp
		else:
			self.inputs.append(inp)
	def set_outputs(self,out):
		if isinstance(out,list):
			self.outputs+=out
		else:
			self.outputs.append(out)
	def set_run_after(self,task):
		assert isinstance(task,Task)
		self.run_after.add(task)
	def signature(self):
		try:
			return self.cache_sig
		except AttributeError:
			pass
		self.m=Utils.md5(self.hcode,usedforsecurity=False)
		self.sig_explicit_deps()
		self.sig_vars()
		if self.scan:
			try:
				self.sig_implicit_deps()
			except Errors.TaskRescan:
				return self.signature()
		ret=self.cache_sig=self.m.digest()
		return ret
	def runnable_status(self):
		bld=self.generator.bld
		if bld.is_install<0:
			return SKIP_ME
		for t in self.run_after:
			if not t.hasrun:
				return ASK_LATER
			elif t.hasrun<SKIPPED:
				return CANCEL_ME
		try:
			new_sig=self.signature()
		except Errors.TaskNotReady:
			return ASK_LATER
		key=self.uid()
		try:
			prev_sig=bld.task_sigs[key]
		except KeyError:
			Logs.debug('task: task %r must run: it was never run before or the task code changed',self)
			return RUN_ME
		if new_sig!=prev_sig:
			Logs.debug('task: task %r must run: the task signature changed',self)
			return RUN_ME
		for node in self.outputs:
			sig=bld.node_sigs.get(node)
			if not sig:
				Logs.debug('task: task %r must run: an output node has no signature',self)
				return RUN_ME
			if sig!=key:
				Logs.debug('task: task %r must run: an output node was produced by another task',self)
				return RUN_ME
			if not node.exists():
				Logs.debug('task: task %r must run: an output node does not exist',self)
				return RUN_ME
		return(self.always_run and RUN_ME)or SKIP_ME
	def post_run(self):
		bld=self.generator.bld
		for node in self.outputs:
			if not node.exists():
				self.hasrun=MISSING
				self.err_msg='-> missing file: %r'%node.abspath()
				raise Errors.WafError(self.err_msg)
			bld.node_sigs[node]=self.uid()
		bld.task_sigs[self.uid()]=self.signature()
		if not self.keep_last_cmd:
			try:
				del self.last_cmd
			except AttributeError:
				pass
	def sig_explicit_deps(self):
		bld=self.generator.bld
		upd=self.m.update
		for x in self.inputs+self.dep_nodes:
			upd(x.get_bld_sig())
		if bld.deps_man:
			additional_deps=bld.deps_man
			for x in self.inputs+self.outputs:
				try:
					d=additional_deps[x]
				except KeyError:
					continue
				for v in d:
					try:
						v=v.get_bld_sig()
					except AttributeError:
						if hasattr(v,'__call__'):
							v=v()
					upd(v)
	def sig_deep_inputs(self):
		bld=self.generator.bld
		lst=[bld.task_sigs[bld.node_sigs[node]]for node in(self.inputs+self.dep_nodes)if node.is_bld()]
		self.m.update(Utils.h_list(lst))
	def sig_vars(self):
		sig=self.generator.bld.hash_env_vars(self.env,self.vars)
		self.m.update(sig)
	scan=None
	def sig_implicit_deps(self):
		bld=self.generator.bld
		key=self.uid()
		prev=bld.imp_sigs.get(key,[])
		if prev:
			try:
				if prev==self.compute_sig_implicit_deps():
					return prev
			except Errors.TaskNotReady:
				raise
			except EnvironmentError:
				for x in bld.node_deps.get(self.uid(),[]):
					if not x.is_bld()and not x.exists():
						try:
							del x.parent.children[x.name]
						except KeyError:
							pass
			del bld.imp_sigs[key]
			raise Errors.TaskRescan('rescan')
		(bld.node_deps[key],bld.raw_deps[key])=self.scan()
		if Logs.verbose:
			Logs.debug('deps: scanner for %s: %r; unresolved: %r',self,bld.node_deps[key],bld.raw_deps[key])
		try:
			bld.imp_sigs[key]=self.compute_sig_implicit_deps()
		except EnvironmentError:
			for k in bld.node_deps.get(self.uid(),[]):
				if not k.exists():
					Logs.warn('Dependency %r for %r is missing: check the task declaration and the build order!',k,self)
			raise
	def compute_sig_implicit_deps(self):
		upd=self.m.update
		self.are_implicit_nodes_ready()
		for k in self.generator.bld.node_deps.get(self.uid(),[]):
			upd(k.get_bld_sig())
		return self.m.digest()
	def are_implicit_nodes_ready(self):
		bld=self.generator.bld
		try:
			cache=bld.dct_implicit_nodes
		except AttributeError:
			bld.dct_implicit_nodes=cache={}
		try:
			dct=cache[bld.current_group]
		except KeyError:
			dct=cache[bld.current_group]={}
			for tsk in bld.cur_tasks:
				for x in tsk.outputs:
					dct[x]=tsk
		modified=False
		for x in bld.node_deps.get(self.uid(),[]):
			if x in dct:
				self.run_after.add(dct[x])
				modified=True
		if modified:
			for tsk in self.run_after:
				if not tsk.hasrun:
					raise Errors.TaskNotReady('not ready')
if sys.hexversion>0x3000000:
	def uid(self):
		try:
			return self.uid_
		except AttributeError:
			m=Utils.md5(self.__class__.__name__.encode('latin-1','xmlcharrefreplace'),usedforsecurity=False)
			up=m.update
			for x in self.inputs+self.outputs:
				up(x.abspath().encode('latin-1','xmlcharrefreplace'))
			self.uid_=m.digest()
			return self.uid_
	uid.__doc__=Task.uid.__doc__
	Task.uid=uid
def is_before(t1,t2):
	to_list=Utils.to_list
	for k in to_list(t2.ext_in):
		if k in to_list(t1.ext_out):
			return 1
	if t1.__class__.__name__ in to_list(t2.after):
		return 1
	if t2.__class__.__name__ in to_list(t1.before):
		return 1
	return 0
def set_file_constraints(tasks):
	ins=Utils.defaultdict(set)
	outs=Utils.defaultdict(set)
	for x in tasks:
		for a in x.inputs:
			ins[a].add(x)
		for a in x.dep_nodes:
			ins[a].add(x)
		for a in x.outputs:
			outs[a].add(x)
	links=set(ins.keys()).intersection(outs.keys())
	for k in links:
		for a in ins[k]:
			a.run_after.update(outs[k])
class TaskGroup(object):
	def __init__(self,prev,next):
		self.prev=prev
		self.next=next
		self.done=False
	def get_hasrun(self):
		for k in self.prev:
			if not k.hasrun:
				return NOT_RUN
		return SUCCESS
	hasrun=property(get_hasrun,None)
def set_precedence_constraints(tasks):
	cstr_groups=Utils.defaultdict(list)
	for x in tasks:
		h=x.hash_constraints()
		cstr_groups[h].append(x)
	keys=list(cstr_groups.keys())
	maxi=len(keys)
	for i in range(maxi):
		t1=cstr_groups[keys[i]][0]
		for j in range(i+1,maxi):
			t2=cstr_groups[keys[j]][0]
			if is_before(t1,t2):
				a=i
				b=j
			elif is_before(t2,t1):
				a=j
				b=i
			else:
				continue
			a=cstr_groups[keys[a]]
			b=cstr_groups[keys[b]]
			if len(a)<2 or len(b)<2:
				for x in b:
					x.run_after.update(a)
			else:
				group=TaskGroup(set(a),set(b))
				for x in b:
					x.run_after.add(group)
def funex(c):
	dc={}
	exec(c,dc)
	return dc['f']
re_cond=re.compile(r'(?P<var>\w+)|(?P<or>\|)|(?P<and>&)')
re_novar=re.compile(r'^(SRC|TGT)\W+.*?$')
reg_act=re.compile(r'(?P<backslash>\\)|(?P<dollar>\$\$)|(?P<subst>\$\{(?P<var>\w+)(?P<code>.*?)\})',re.M)
def compile_fun_shell(line):
	extr=[]
	def repl(match):
		g=match.group
		if g('dollar'):
			return"$"
		elif g('backslash'):
			return'\\\\'
		elif g('subst'):
			extr.append((g('var'),g('code')))
			return"%s"
		return None
	line=reg_act.sub(repl,line)or line
	dvars=[]
	def add_dvar(x):
		if x not in dvars:
			dvars.append(x)
	def replc(m):
		if m.group('and'):
			return' and '
		elif m.group('or'):
			return' or '
		else:
			x=m.group('var')
			add_dvar(x)
			return'env[%r]'%x
	parm=[]
	app=parm.append
	for(var,meth)in extr:
		if var=='SRC':
			if meth:
				app('tsk.inputs%s'%meth)
			else:
				app('" ".join([a.path_from(cwdx) for a in tsk.inputs])')
		elif var=='TGT':
			if meth:
				app('tsk.outputs%s'%meth)
			else:
				app('" ".join([a.path_from(cwdx) for a in tsk.outputs])')
		elif meth:
			if meth.startswith(':'):
				add_dvar(var)
				m=meth[1:]
				if m=='SRC':
					m='[a.path_from(cwdx) for a in tsk.inputs]'
				elif m=='TGT':
					m='[a.path_from(cwdx) for a in tsk.outputs]'
				elif re_novar.match(m):
					m='[tsk.inputs%s]'%m[3:]
				elif re_novar.match(m):
					m='[tsk.outputs%s]'%m[3:]
				else:
					add_dvar(m)
					if m[:3]not in('tsk','gen','bld'):
						m='%r'%m
				app('" ".join(tsk.colon(%r, %s))'%(var,m))
			elif meth.startswith('?'):
				expr=re_cond.sub(replc,meth[1:])
				app('p(%r) if (%s) else ""'%(var,expr))
			else:
				call='%s%s'%(var,meth)
				add_dvar(call)
				app(call)
		else:
			add_dvar(var)
			app("p('%s')"%var)
	if parm:
		parm="%% (%s) "%(',\n\t\t'.join(parm))
	else:
		parm=''
	c=COMPILE_TEMPLATE_SHELL%(line,parm)
	Logs.debug('action: %s',c.strip().splitlines())
	return(funex(c),dvars)
reg_act_noshell=re.compile(r"(?P<space>\s+)|(?P<subst>\$\{(?P<var>\w+)(?P<code>.*?)\})|(?P<text>([^$ \t\n\r\f\v]|\$\$)+)",re.M)
def compile_fun_noshell(line):
	buf=[]
	dvars=[]
	merge=False
	app=buf.append
	def add_dvar(x):
		if x not in dvars:
			dvars.append(x)
	def replc(m):
		if m.group('and'):
			return' and '
		elif m.group('or'):
			return' or '
		else:
			x=m.group('var')
			add_dvar(x)
			return'env[%r]'%x
	for m in reg_act_noshell.finditer(line):
		if m.group('space'):
			merge=False
			continue
		elif m.group('text'):
			app('[%r]'%m.group('text').replace('$$','$'))
		elif m.group('subst'):
			var=m.group('var')
			code=m.group('code')
			if var=='SRC':
				if code:
					app('[tsk.inputs%s]'%code)
				else:
					app('[a.path_from(cwdx) for a in tsk.inputs]')
			elif var=='TGT':
				if code:
					app('[tsk.outputs%s]'%code)
				else:
					app('[a.path_from(cwdx) for a in tsk.outputs]')
			elif code:
				if code.startswith(':'):
					add_dvar(var)
					m=code[1:]
					if m=='SRC':
						m='[a.path_from(cwdx) for a in tsk.inputs]'
					elif m=='TGT':
						m='[a.path_from(cwdx) for a in tsk.outputs]'
					elif re_novar.match(m):
						m='[tsk.inputs%s]'%m[3:]
					elif re_novar.match(m):
						m='[tsk.outputs%s]'%m[3:]
					else:
						add_dvar(m)
						if m[:3]not in('tsk','gen','bld'):
							m='%r'%m
					app('tsk.colon(%r, %s)'%(var,m))
				elif code.startswith('?'):
					expr=re_cond.sub(replc,code[1:])
					app('to_list(env[%r] if (%s) else [])'%(var,expr))
				else:
					call='%s%s'%(var,code)
					add_dvar(call)
					app('to_list(%s)'%call)
			else:
				app('to_list(env[%r])'%var)
				add_dvar(var)
		if merge:
			tmp='merge(%s, %s)'%(buf[-2],buf[-1])
			del buf[-1]
			buf[-1]=tmp
		merge=True
	buf=['lst.extend(%s)'%x for x in buf]
	fun=COMPILE_TEMPLATE_NOSHELL%"\n\t".join(buf)
	Logs.debug('action: %s',fun.strip().splitlines())
	return(funex(fun),dvars)
def compile_fun(line,shell=False):
	if isinstance(line,str):
		if line.find('<')>0 or line.find('>')>0 or line.find('&&')>0:
			shell=True
	else:
		dvars_lst=[]
		funs_lst=[]
		for x in line:
			if isinstance(x,str):
				fun,dvars=compile_fun(x,shell)
				dvars_lst+=dvars
				funs_lst.append(fun)
			else:
				funs_lst.append(x)
		def composed_fun(task):
			for x in funs_lst:
				ret=x(task)
				if ret:
					return ret
			return None
		return composed_fun,dvars_lst
	if shell:
		return compile_fun_shell(line)
	else:
		return compile_fun_noshell(line)
def compile_sig_vars(vars):
	buf=[]
	for x in sorted(vars):
		if x[:3]in('tsk','gen','bld'):
			buf.append('buf.append(%s)'%x)
	if buf:
		return funex(COMPILE_TEMPLATE_SIG_VARS%'\n\t'.join(buf))
	return None
def task_factory(name,func=None,vars=None,color='GREEN',ext_in=[],ext_out=[],before=[],after=[],shell=False,scan=None):
	params={'vars':vars or[],'color':color,'name':name,'shell':shell,'scan':scan,}
	if isinstance(func,str)or isinstance(func,tuple):
		params['run_str']=func
	else:
		params['run']=func
	cls=type(Task)(name,(Task,),params)
	classes[name]=cls
	if ext_in:
		cls.ext_in=Utils.to_list(ext_in)
	if ext_out:
		cls.ext_out=Utils.to_list(ext_out)
	if before:
		cls.before=Utils.to_list(before)
	if after:
		cls.after=Utils.to_list(after)
	return cls
def deep_inputs(cls):
	def sig_explicit_deps(self):
		Task.sig_explicit_deps(self)
		Task.sig_deep_inputs(self)
	cls.sig_explicit_deps=sig_explicit_deps
	return cls
class TaskSemaphore(object):
	def __init__(self,num):
		self.num=num
		self.locking=set()
		self.waiting=set()
	def is_locked(self):
		return len(self.locking)>=self.num
	def acquire(self,tsk):
		if self.is_locked():
			raise IndexError('Cannot lock more %r'%self.locking)
		self.locking.add(tsk)
	def release(self,tsk):
		self.locking.remove(tsk)
