1 files changed, 39 insertions, 0 deletions
diff --git a/Library/Homebrew/debrew/menu.rb b/Library/Homebrew/debrew/menu.rb
new file mode 100644
index 000000000..c59c500b8
--- /dev/null
+++ b/Library/Homebrew/debrew/menu.rb
@@ -0,0 +1,39 @@
+class Menu
+  attr_accessor :prompt
+  attr_accessor :entries
+
+  def initialize
+    @entries = []
+  end
+
+  def choice(name, &action)
+    entries << { :name => name, :action => action }
+  end
+end
+
+def choose
+  menu = Menu.new
+  yield menu
+
+  choice = nil
+  while choice.nil?
+    menu.entries.each_with_index do |entry, i|
+      puts "#{i+1}. #{entry[:name]}"
+    end
+    print menu.prompt unless menu.prompt.nil?
+    reply = $stdin.gets.chomp
+
+    i = reply.to_i
+    if i > 0
+      choice = menu.entries[i-1]
+    else
+      possible = menu.entries.find_all {|e| e[:name].to_s.start_with? reply }
+      case possible.size
+        when 0 then puts "No such option"
+        when 1 then choice = possible.first
+        else puts "Multiple options match: #{possible.map{|e| e[:name]}.join(' ')}"
+      end
+    end
+  end
+  choice[:action].call
+end