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).
Is this file task needed? Yes if it doesn’t exist, or if its time stamp is out of date.
# File lib/rake/file_task.rb, line 16 def needed? begin out_of_date?(File.mtime(name)) || @application.options.build_all rescue Errno::ENOENT true end end
Time stamp for file task.
# File lib/rake/file_task.rb, line 25 def timestamp begin File.mtime(name) rescue Errno::ENOENT Rake::LATE end end