adding-help: commit optimized tab completion and help

lib/feature/commander.rb

@@ -1,34 +1,11 @@
-require_relative './start'
-require_relative './end'
-require_relative './trash'
-require_relative './rebase'
-require_relative './merge_to'
-require_relative './tab'
-require_relative './branch'
-require_relative './commit'
-require_relative './help'
-
 module Feature
 
   class Commander
-    attr_reader :subcommands, :subcommand
+    attr_reader :subcommand
 
     def initialize (argv)
-      @subcommands = {
-        branch: Feature::Branch.new(argv),
-        commit: Feature::Commit.new(argv),
-        help:   Feature::Help.new(argv),
-        end:    Feature::End.new(argv),
-        rebase: Feature::Rebase.new(argv),
-        merge:  Feature::MergeTo.new(argv),
-        start:  Feature::Start.new(argv),
-        tab:    Feature::Tab.new(argv),
-        trash:  Feature::Trash.new(argv)
-      }
-
       key = (argv[0] ? argv[0].to_sym : :branch)
-
-      @subcommand = (subcommands[key] ? subcommands[key] : subcommands[:help])
+      @subcommand = Commander.create(key,argv)
     end
 
     def valid?
@@ -43,6 +20,30 @@ module Feature
       subcommand.execute
     end
 
+    def self.commands
+      [
+        :branch,
+        :commit,
+        :help,
+        :end,
+        :rebase,
+        :merge,
+        :start,
+        :tab,
+        :trash
+      ].sort
+    end
+
+    def self.create key, argv
+      key = "help" unless Commander.commands.include? key
+      require_relative "./#{key}"
+      klass = Module.const_get "Feature::#{key.capitalize}"
+      klass.new(argv)
+    end
+
+    def self.create_all argv
+      commands.map { |x| create(x,argv) }
+    end
   end
 
 end