1 files changed, 88 insertions, 0 deletions
diff --git a/lib/bundler/vendor/thor/lib/thor/line_editor/readline.rb b/lib/bundler/vendor/thor/lib/thor/line_editor/readline.rb
new file mode 100644
index 0000000000..dd39cff35d
--- /dev/null
+++ b/lib/bundler/vendor/thor/lib/thor/line_editor/readline.rb
@@ -0,0 +1,88 @@
+begin
+  require "readline"
+rescue LoadError
+end
+
+class Bundler::Thor
+  module LineEditor
+    class Readline < Basic
+      def self.available?
+        Object.const_defined?(:Readline)
+      end
+
+      def readline
+        if echo?
+          ::Readline.completion_append_character = nil
+          # Ruby 1.8.7 does not allow Readline.completion_proc= to receive nil.
+          if complete = completion_proc
+            ::Readline.completion_proc = complete
+          end
+          ::Readline.readline(prompt, add_to_history?)
+        else
+          super
+        end
+      end
+
+    private
+
+      def add_to_history?
+        options.fetch(:add_to_history, true)
+      end
+
+      def completion_proc
+        if use_path_completion?
+          proc { |text| PathCompletion.new(text).matches }
+        elsif completion_options.any?
+          proc do |text|
+            completion_options.select { |option| option.start_with?(text) }
+          end
+        end
+      end
+
+      def completion_options
+        options.fetch(:limited_to, [])
+      end
+
+      def use_path_completion?
+        options.fetch(:path, false)
+      end
+
+      class PathCompletion
+        attr_reader :text
+        private :text
+
+        def initialize(text)
+          @text = text
+        end
+
+        def matches
+          relative_matches
+        end
+
+      private
+
+        def relative_matches
+          absolute_matches.map { |path| path.sub(base_path, "") }
+        end
+
+        def absolute_matches
+          Dir[glob_pattern].map do |path|
+            if File.directory?(path)
+              "#{path}/"
+            else
+              path
+            end
+          end
+        end
+
+        def glob_pattern
+          "#{base_path}#{text}*"
+        end
+
+        def base_path
+          "#{Dir.pwd}/"
+        end
+      end
+    end
+  end
+end