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= Original Prototype Rake This is the original 100 line prototype rake program. --- #!/opt/alt/ruby32/bin/ruby require 'ftools' class Task TASKS = Hash.new attr_reader :prerequisites def initialize(task_name) @name = task_name @prerequisites = [] @actions = [] end def enhance(deps=nil, &block) @prerequisites |= deps if deps @actions << block if block_given? self end def name @name.to_s end def invoke @prerequisites.each { |n| Task[n].invoke } execute if needed? end def execute return if @triggered @triggered = true @actions.collect { |act| result = act.call(self) }.last end def needed? true end def timestamp Time.now end class << self def [](task_name) TASKS[intern(task_name)] or fail "Don't know how to rake #{task_name}" end def define_task(args, &block) case args when Hash fail "Too Many Target Names: #{args.keys.join(' ')}" if args.size > 1 fail "No Task Name Given" if args.size < 1 task_name = args.keys[0] deps = args[task_name] else task_name = args deps = [] end deps = deps.collect {|d| intern(d) } get(task_name).enhance(deps, &block) end def get(task_name) name = intern(task_name) TASKS[name] ||= self.new(name) end def intern(task_name) (Symbol === task_name) ? task_name : task_name.intern end end end class FileTask < Task def needed? return true unless File.exist?(name) latest_prereq = @prerequisites.collect{|n| Task[n].timestamp}.max return false if latest_prereq.nil? timestamp < latest_prereq end def timestamp File.new(name.to_s).mtime end end def task(args, &block) Task.define_task(args, &block) end def file(args, &block) FileTask.define_task(args, &block) end def sys(cmd) puts cmd system(cmd) or fail "Command Failed: [#{cmd}]" end def rake begin here = Dir.pwd while ! File.exist?("Rakefile") Dir.chdir("..") fail "No Rakefile found" if Dir.pwd == here here = Dir.pwd end puts "(in #{Dir.pwd})" load "./Rakefile" ARGV.push("default") if ARGV.size == 0 ARGV.each { |task_name| Task[task_name].invoke } rescue Exception => ex puts "rake aborted ... #{ex.message}" puts ex.backtrace.find {|str| str =~ /Rakefile/ } || "" end end if __FILE__ == $0 then rake end
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