require 'rake/task.rb' require 'rake/early_time' module Rake # ######################################################################### # A FileTask is a task that includes time based dependencies. If any of a # FileTask's prerequisites have a timestamp that is later than the file # represented by this task, then the file must be rebuilt (using the # supplied actions). # class FileTask < Task # Is this file task needed? Yes if it doesn't exist, or if its time stamp # is out of date. def needed? ! File.exist?(name) || out_of_date?(timestamp) end # Time stamp for file task. def timestamp if File.exist?(name) File.mtime(name.to_s) else Rake::EARLY end end private # Are there any prerequisites with a later time than the given time stamp? def out_of_date?(stamp) @prerequisites.any? { |n| application[n, @scope].timestamp > stamp } end # ---------------------------------------------------------------- # Task class methods. # class << self # Apply the scope to the task name according to the rules for this kind # of task. File based tasks ignore the scope when creating the name. def scope_name(scope, task_name) task_name end end end end