Class: Rake::Task

Inherits:
Object
  • Object
show all
Defined in:
lib/rote/rotetasks.rb,
lib/rote/cache.rb

Overview

Rote adds the following methods to the Rake::Task class.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.memoize(args, &block) ⇒ Object

Memoize the result of the block with respect to the file-based dependencies. Specify a description and dependencies like a Task:

Rake::Task.memoize :task_name => [fn1,fn2] { ... }

If the cached result is up-to-date with respect to the dependencies then the block will not be executed. Instead, the result will be unmarshalled from disk.



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# File 'lib/rote/cache.rb', line 97

def self.memoize(args, &block)
  task_name, deps = resolve_args(args)
  fn = File.join(Rake.cache_dir, MD5.new(deps.inspect).to_s + "." + task_name)
  Rake.register_dependency(deps)
  
  result = nil
  # This file task isn't ever used other than manually below with t.invoke
  t = file fn => deps do
    result = block.call
    mkdir_p Rake.cache_dir unless File.exists?(Rake.cache_dir)
    File.open(fn,"w") { |fp| Marshal.dump(result,fp) }
  end
  if t.needed? then
    t.invoke
    result
  else
    Marshal.load(File.read(fn))
  end
end

Instance Method Details

#execute(args) ⇒ Object

Execute the task, setting the executed flag. Used by the monitor task.



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# File 'lib/rote/rotetasks.rb', line 350

def execute(args)
  @executed = true
  pre_rote_execute
end

#executed? ⇒ Boolean

Determine whether this task has been executed in this cycle. Used by the monitor task.

Returns:

  • (Boolean) 


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# File 'lib/rote/rotetasks.rb', line 343

def executed?
  @executed
end

#pre_rote_execute ⇒ Object 



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# File 'lib/rote/rotetasks.rb', line 347

alias :pre_rote_execute :execute

#reset ⇒ Object

Reset the executed and invoked flags on this task. Used by the monitor task.



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# File 'lib/rote/rotetasks.rb', line 336

def reset
  @already_invoked = false
  @executed = false
end