Module: Scripting

Defined in:
lib/scripting/parser.rb,
lib/scripting/options.rb,
lib/scripting/commands.rb,
lib/scripting/pluggable.rb,
lib/scripting/application.rb,
lib/scripting/app_defaults.rb

Defined Under Namespace

Modules: AppDefaults, Commands, Pluggable Classes: Application, Options

Constant Summary collapse

Parser = 
Scripting::CustomParser(OptionParser)

Class Method Summary collapse

Class Method Details

.create_application(&blk) ⇒ Object

Creates a new Scripting::Application class instance receiving a block used to describe options, command line switches, and other traits.

my_app = Scripting::create_application do
  plugin Scripting::AppDefaults

  options do
    message = "Hello World"
    stderr = false
    stdout = true
  end

  switches do
    on('--message=TEXT (default: #{options.message})') { |opt| options.message = opt }
    on('--[no]-stderr') { |opt| options.stderr = opt }
    on('--[no]-stdout') { |opt| options.stdout = opt }
  end

  work do
    $stderr.puts options.message if options.stderr?
    $stdout.puts options.message if options.stdout?
  end
end



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# File 'lib/scripting/application.rb', line 105

def self.create_application &blk
  app = Class.new(Application).new
  app.describe &blk
  app
end

.CustomParser(klass) ⇒ Object

TODO: flesh this out… We can, ideally, use any options parser but by default we use optparse.



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# File 'lib/scripting/parser.rb', line 7

def self.CustomParser(klass)
  custom = Class.new(DelegateClass(klass))
  custom.class_eval do
    extend Forwardable
    def_delegators :@context, :context, :options
    def describe; instance_eval; end
  end

  custom.send(:define_method, :initialize) do |context|
    @context = context
    super(klass.new)
  end

  custom
end