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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# is out of date.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
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