Python Task.deep_inputs方法代码示例

# 需要导入模块: from waflib import Task [as 别名]
# 或者: from waflib.Task import deep_inputs [as 别名]
def process_rule(self):
	"""
	Processes the attribute ``rule``. When present, :py:meth:`waflib.TaskGen.process_source` is disabled::

		def build(bld):
			bld(rule='cp ${SRC} ${TGT}', source='wscript', target='bar.txt')

	Main attributes processed:

	* rule: command to execute, it can be a tuple of strings for multiple commands
	* chmod: permissions for the resulting files (integer value such as Utils.O755)
	* shell: set to False to execute the command directly (default is True to use a shell)
	* scan: scanner function
	* vars: list of variables to trigger rebuilds, such as CFLAGS
	* cls_str: string to display when executing the task
	* cls_keyword: label to display when executing the task
	* cache_rule: by default, try to re-use similar classes, set to False to disable
	* source: list of Node or string objects representing the source files required by this task
	* target: list of Node or string objects representing the files that this task creates
	* cwd: current working directory (Node or string)
	* stdout: standard output, set to None to prevent waf from capturing the text
	* stderr: standard error, set to None to prevent waf from capturing the text
	* timeout: timeout for command execution (Python 3)
	* always: whether to always run the command (False by default)
	* deep_inputs: whether the task must depend on the input file tasks too (False by default)
	"""
	if not getattr(self, 'rule', None):
		return

	# create the task class
	name = str(getattr(self, 'name', None) or self.target or getattr(self.rule, '__name__', self.rule))

	# or we can put the class in a cache for performance reasons
	try:
		cache = self.bld.cache_rule_attr
	except AttributeError:
		cache = self.bld.cache_rule_attr = {}

	chmod = getattr(self, 'chmod', None)
	shell = getattr(self, 'shell', True)
	color = getattr(self, 'color', 'BLUE')
	scan = getattr(self, 'scan', None)
	_vars = getattr(self, 'vars', [])
	cls_str = getattr(self, 'cls_str', None)
	cls_keyword = getattr(self, 'cls_keyword', None)
	use_cache = getattr(self, 'cache_rule', 'True')
	deep_inputs = getattr(self, 'deep_inputs', False)

	scan_val = has_deps = hasattr(self, 'deps')
	if scan:
		scan_val = id(scan)

	key = Utils.h_list((name, self.rule, chmod, shell, color, cls_str, cls_keyword, scan_val, _vars, deep_inputs))

	cls = None
	if use_cache:
		try:
			cls = cache[key]
		except KeyError:
			pass
	if not cls:
		rule = self.rule
		if chmod is not None:
			def chmod_fun(tsk):
				for x in tsk.outputs:
					os.chmod(x.abspath(), tsk.generator.chmod)
			if isinstance(rule, tuple):
				rule = list(rule)
				rule.append(chmod_fun)
				rule = tuple(rule)
			else:
				rule = (rule, chmod_fun)

		cls = Task.task_factory(name, rule, _vars, shell=shell, color=color)

		if cls_str:
			setattr(cls, '__str__', self.cls_str)

		if cls_keyword:
			setattr(cls, 'keyword', self.cls_keyword)

		if deep_inputs:
			Task.deep_inputs(cls)

		if scan:
			cls.scan = self.scan
		elif has_deps:
			def scan(self):
				nodes = []
				for x in self.generator.to_list(getattr(self.generator, 'deps', None)):
					node = self.generator.path.find_resource(x)
					if not node:
						self.generator.bld.fatal('Could not find %r (was it declared?)' % x)
					nodes.append(node)
				return [nodes, []]
			cls.scan = scan

		if use_cache:
			cache[key] = cls

#.........这里部分代码省略.........