added gem server --launch option to launch a browser pointing at gem …

…server

lib/rubygems/commands/server_command.rb

@@ -43,6 +43,10 @@ def initialize
       options[:addresses] ||= []
       options[:addresses].push(*address)
     end
+
+    add_option '--launch', 'launch a browser window' do |launch, options|
+      options[:launch] = launch
+    end
   end
 
   def defaults_str # :nodoc:

lib/rubygems/server.rb

@@ -429,18 +429,19 @@ class Gem::Server
 
   def self.run(options)
     new(options[:gemdir], options[:port], options[:daemon],
-        options[:addresses]).run
+        options[:launch],options[:addresses]).run
   end
 
   ##
   # Only the first directory in gem_dirs is used for serving gems
 
-  def initialize(gem_dirs, port, daemon, addresses = nil)
+  def initialize(gem_dirs, port, daemon, launch, addresses = nil)
     Socket.do_not_reverse_lookup = true
 
     @gem_dirs = Array gem_dirs
     @port = port
     @daemon = daemon
+    @launch = launch
     @addresses = addresses
     logger = WEBrick::Log.new nil, WEBrick::BasicLog::FATAL
     @server = WEBrick::HTTPServer.new :DoNotListen => true, :Logger => logger
@@ -802,6 +803,8 @@ def run
 
     trap("INT") { @server.shutdown; exit! }
     trap("TERM") { @server.shutdown; exit! }
+
+    launch if @launch
 
     @server.start
   end
@@ -854,6 +857,15 @@ def yaml(req, res)
 
     res.body << index
   end
+
+  def launch
+    listeners = @server.listeners.map{|l| l.addr[2] }
+
+    host = listeners.any?{|l| l == '0.0.0.0'} ? 'localhost' : listeners.first
+    cmd  = Gem.win_platform? ? 'start' : 'open'
+
+    system("#{cmd} http://#{host}:#{@port}")  
+  end
 
 end