1 files changed, 67 insertions, 0 deletions
diff --git a/lib/bundler/vendor/thor/parser/argument.rb b/lib/bundler/vendor/thor/parser/argument.rb
new file mode 100644
index 0000000000..aa8ace4719
--- /dev/null
+++ b/lib/bundler/vendor/thor/parser/argument.rb
@@ -0,0 +1,67 @@
+class Thor
+  class Argument #:nodoc:
+    VALID_TYPES = [ :numeric, :hash, :array, :string ]
+
+    attr_reader :name, :description, :required, :type, :default, :banner
+    alias :human_name :name
+
+    def initialize(name, description=nil, required=true, type=:string, default=nil, banner=nil)
+      class_name = self.class.name.split("::").last
+
+      raise ArgumentError, "#{class_name} name can't be nil."                         if name.nil?
+      raise ArgumentError, "Type :#{type} is not valid for #{class_name.downcase}s."  if type && !valid_type?(type)
+
+      @name        = name.to_s
+      @description = description
+      @required    = required || false
+      @type        = (type || :string).to_sym
+      @default     = default
+      @banner      = banner || default_banner
+
+      validate! # Trigger specific validations
+    end
+
+    def usage
+      required? ? banner : "[#{banner}]"
+    end
+
+    def required?
+      required
+    end
+
+    def show_default?
+      case default
+        when Array, String, Hash
+          !default.empty?
+        else
+          default
+      end
+    end
+
+    protected
+
+      def validate!
+        raise ArgumentError, "An argument cannot be required and have default value." if required? && !default.nil?
+      end
+
+      def valid_type?(type)
+        VALID_TYPES.include?(type.to_sym)
+      end
+
+      def default_banner
+        case type
+          when :boolean
+            nil
+          when :string, :default
+            human_name.upcase
+          when :numeric
+            "N"
+          when :hash
+            "key:value"
+          when :array
+            "one two three"
+        end
+      end
+
+  end
+end