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The TaskManager module is a mixin for managing tasks.
Find a matching task for task_name
.
# File rake/task_manager.rb, line 44 def [](task_name, scopes=nil) task_name = task_name.to_s self.lookup(task_name, scopes) or enhance_with_matching_rule(task_name) or synthesize_file_task(task_name) or fail "Don't know how to build task '#{task_name}'" end
Clear all tasks in this application.
# File rake/task_manager.rb, line 157 def clear @tasks.clear @rules.clear end
# File rake/task_manager.rb, line 17 def create_rule(*args, &block) pattern, _, deps = resolve_args(args) pattern = Regexp.new(Regexp.quote(pattern) + '$') if String === pattern @rules << [pattern, deps, block] end
Return the list of scope names currently active in the task manager.
# File rake/task_manager.rb, line 197 def current_scope @scope.dup end
# File rake/task_manager.rb, line 23 def define_task(task_class, *args, &block) task_name, arg_names, deps = resolve_args(args) task_name = task_class.scope_name(@scope, task_name) deps = [deps] unless deps.respond_to?(:to_ary) deps = deps.collect {|d| d.to_s } task = intern(task_class, task_name) task.set_arg_names(arg_names) unless arg_names.empty? if Rake::TaskManager.record_task_metadata add_location(task) task.add_description(get_description(task)) end task.enhance(deps, &block) end
If a rule can be found that matches the task name, enhance the task with the prerequisites and actions from the rule. Set the source attribute of the task appropriately for the rule. Return the enhanced task or nil of no rule was found.
# File rake/task_manager.rb, line 127 def enhance_with_matching_rule(task_name, level=0) fail Rake::RuleRecursionOverflowError, "Rule Recursion Too Deep" if level >= 16 @rules.each do |pattern, extensions, block| if pattern.match(task_name) task = attempt_rule(task_name, extensions, block, level) return task if task end end nil rescue Rake::RuleRecursionOverflowError => ex ex.add_target(task_name) fail ex end
Evaluate the block in a nested namespace named name
. Create
an anonymous namespace if name
is nil.
# File rake/task_manager.rb, line 203 def in_namespace(name) name ||= generate_name @scope.push(name) ns = NameSpace.new(self, @scope) yield(ns) ns ensure @scope.pop end
Lookup a task. Return an existing task if found, otherwise create a task of the current type.
# File rake/task_manager.rb, line 39 def intern(task_class, task_name) @tasks[task_name.to_s] ||= task_class.new(task_name, self) end
Lookup a task, using scope and the scope hints in the task name. This method performs straight lookups without trying to synthesize file tasks or rules. Special scope names (e.g. '^') are recognized. If no scope argument is supplied, use the current scope. Return nil if the task cannot be found.
# File rake/task_manager.rb, line 167 def lookup(task_name, initial_scope=nil) initial_scope ||= @scope task_name = task_name.to_s if task_name =~ /^rake:/ scopes = [] task_name = task_name.sub(/^rake:/, '') elsif task_name =~ /^(\^+)/ scopes = initial_scope[0, initial_scope.size - $1.size] task_name = task_name.sub(/^(\^+)/, '') else scopes = initial_scope end lookup_in_scope(task_name, scopes) end
Resolve the arguments for a task/rule. Returns a triplet of [task_name, arg_name_list, prerequisites].
# File rake/task_manager.rb, line 59 def resolve_args(args) if args.last.is_a?(Hash) deps = args.pop resolve_args_with_dependencies(args, deps) else resolve_args_without_dependencies(args) end end
# File rake/task_manager.rb, line 52 def synthesize_file_task(task_name) return nil unless File.exist?(task_name) define_task(Rake::FileTask, task_name) end