Module: StdCmd::Set

Defined in:
lib/command-set/standard-commands.rb

Constant Summary collapse

@@set = 
nil

Class Method Summary collapse

Class Method Details

.define_commands ⇒ Object 



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# File 'lib/command-set/standard-commands.rb', line 154

def self.define_commands
  return @@set ||= Command::CommandSet.define_commands do
    command(:set) do
      optional.multiword_argument(:address) do |terms, subject|
        last_word = terms.pop
        hash = value_set(terms, subject)
        if(Hash === hash)
          return hash.keys.grep(%r{^#{last_word}.*})
        else
          return []
        end
      end

      optional.argument(:value, "VALUE")

      def value_set(terms, subject)
        knobs = subject.knobs
        return [] if knobs.nil?

        terms.each do |term|
          unless knobs.respond_to? :[]
            raise Command::CommandError, "can't find settings under #{term}" 
          end
          knobs = knobs[term]
        end

        return knobs
      end

      define_method :value_set do |terms, subject|
        self.class.value_set(terms, subject)
      end

      subject_methods :knobs

      #TODO: This is a big mess in here
      #AFAICT, there should be an address, followed by an optional name
      #followed by an optional value...

      action do
        if address.nil?
          dont_undo
          puts subject.knobs.keys.sort.join("\n")
          return
        else
          @knob_name = address.pop 
          @knobs = value_set(address, subject)
        end

        if Hash === @knobs[@knob_name]
          dont_undo 
          puts @knobs[@knob_name].keys.sort.join("\n")
          return
        elsif @knobs.has_key? @knob_name
          if value.nil?
            dont_undo
            puts "#@knob_name: #{@knobs[@knob_name].inspect}"
          else
            @original_value = @knobs[@knob_name]
            @knobs[@knob_name]=value
            #I'm only keeping this because I trust you meant something
            #@knobs[@knob_name]=convert_value(@original_value, value)
          end
        end
      end 

      undo do
        @knobs[@knob_name] = @original_value
      end

      document <<-EOH
    Without arugments, lists the available variables.

    With one argument, prints the value of the variable <name>.

    Sets <name> to <value>.  Most settings should be obvious.  But 
    some important ones probably won't be.  
    EOH
    end
  end  
end