# module Bundler::Thor::Invocation

### Public Instance Methods

current_command_chain() click to toggle source

Make the current command chain accessible with in a Bundler::Thor-(sub)command

    # File lib/bundler/vendor/thor/lib/thor/invocation.rb, line 29
    def current_command_chain
      @_invocations.values.flatten.map(&:to_sym)
    end

invoke(name = nil, *args) click to toggle source

Receives a name and invokes it. The name can be a string (either “command” or “namespace:command”), a `Bundler::Thor::Command`, a `Class` or a Bundler::Thor instance. If the command cannot be guessed by name, it can also be supplied as second argument.

You can also supply the arguments, options and configuration values for the command to be invoked, if none is given, the same values used to initialize the invoker are used to initialize the invoked.

When no name is given, it will invoke the default command of the current class.

#### Examples¶ ↑

    class A < Bundler::Thor
      def foo
        invoke :bar
        invoke "b:hello", ["Erik"]
      end

      def bar
        invoke "b:hello", ["Erik"]
      end
    end

    class B < Bundler::Thor
      def hello(name)
        puts "hello #{name}"
      end
    end

You can notice that the method “foo” above invokes two commands: “bar”, which belongs to the same class and “hello” which belongs to the class B.

By using an invocation system you ensure that a command is invoked only once. In the example above, invoking “foo” will invoke “b:hello” just once, even if it's invoked later by “bar” method.

When class A invokes class B, all arguments used on A initialization are supplied to B. This allows lazy parse of options. Let's suppose you have some rspec commands:

    class Rspec < Bundler::Thor::Group
      class_option :mock_framework, :type => :string, :default => :rr

      def invoke_mock_framework
        invoke "rspec:#{options[:mock_framework]}"
      end
    end

As you noticed, it invokes the given mock framework, which might have its own options:

    class Rspec::RR < Bundler::Thor::Group
      class_option :style, :type => :string, :default => :mock
    end

Since it's not rspec concern to parse mock framework options, when RR is invoked all options are parsed again, so RR can extract only the options that it's going to use.

If you want Rspec::RR to be initialized with its own set of options, you have to do that explicitly:

    invoke "rspec:rr", [], :style => :foo

Besides giving an instance, you can also give a class to invoke:

    invoke Rspec::RR, [], :style => :foo

    # File lib/bundler/vendor/thor/lib/thor/invocation.rb, line 101
    def invoke(name = nil, *args)
      if name.nil?
        warn "[Bundler::Thor] Calling invoke() without argument is deprecated. Please use invoke_all instead.\n#{caller.join("\n")}"
        return invoke_all
      end

      args.unshift(nil) if args.first.is_a?(Array) || args.first.nil?
      command, args, opts, config = args

      klass, command = _retrieve_class_and_command(name, command)
      raise "Missing Bundler::Thor class for invoke #{name}" unless klass
      raise "Expected Bundler::Thor class, got #{klass}" unless klass <= Bundler::Thor::Base

      args, opts, config = _parse_initialization_options(args, opts, config)
      klass.send(:dispatch, command, args, opts, config) do |instance|
        instance.parent_options = options
      end
    end

invoke_with_padding(*args) click to toggle source

Invokes using shell padding.

    # File lib/bundler/vendor/thor/lib/thor/invocation.rb, line 137
    def invoke_with_padding(*args)
      with_padding { invoke(*args) }
    end