Class: Vli::Action::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/vli/action/runner.rb

Constant Summary collapse

@@reported_interrupt = 
false

Instance Method Summary collapse

Constructor Details

#initialize(registry, globals = nil, &block) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/vli/action/runner.rb', line 9

def initialize(registry, globals=nil, &block)
  @registry     = registry
  @globals      = globals || {}
  @lazy_globals = block
end

Instance Method Details

#exit_immediately_message ⇒ Object 



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# File 'lib/vli/action/runner.rb', line 46

def exit_immediately_message
  "Exiting immediately, without cleanup!"
end

#run(callable_id, options = nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/vli/action/runner.rb', line 15

def run(callable_id, options=nil)
  callable = callable_id
  callable = Builder.new.use(callable_id) if callable_id.kind_of?(Class)
  callable = @registry.get(callable_id) if callable_id.kind_of?(Symbol)
  raise ArgumentError, "Argument to run must be a callable object or registered action." if !callable || !callable.respond_to?(:call)

  # Create the initial environment with the options given
  environment = Environment.new
  environment.merge!(@globals)
  environment.merge!(@lazy_globals.call) if @lazy_globals
  environment.merge!(options || {})

  # Run the action chain in a busy block, marking the environment as
  # interrupted if a SIGINT occurs, and exiting cleanly once the
  # chain has been run.
  ui = environment[:ui] if environment.has_key?(:ui)
  int_callback = lambda do
    if environment[:interrupted]
      ui.error exit_immediately_message if ui
      abort
    end

    ui.warn waiting_cleanup_message if ui && !@@reported_interrupt
    environment[:interrupted] = true
    @@reported_interrupt = true
  end

  # We place a process lock around every action that is called
  Util::Busy.busy(int_callback) { callable.call(environment) }
end

#waiting_cleanup_message ⇒ Object 



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# File 'lib/vli/action/runner.rb', line 50

def waiting_cleanup_message
  "Waiting for cleanup before exiting..."
end