Import RubyGems trunk revision 1493.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13862 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/commands/outdated_command.rb

@@ -0,0 +1,30 @@
+require 'rubygems/command'
+require 'rubygems/local_remote_options'
+require 'rubygems/source_info_cache'
+require 'rubygems/version_option'
+
+class Gem::Commands::OutdatedCommand < Gem::Command
+
+  include Gem::LocalRemoteOptions
+  include Gem::VersionOption
+
+  def initialize
+    super 'outdated', 'Display all gems that need updates'
+
+    add_local_remote_options
+    add_platform_option
+  end
+
+  def execute
+    locals = Gem::SourceIndex.from_installed_gems
+
+    locals.outdated.sort.each do |name|
+      local = locals.search(/^#{name}$/).last
+      remotes = Gem::SourceInfoCache.search_with_source(/^#{name}$/, true)
+      remote = remotes.last.first
+      say "#{local.name} (#{local.version} < #{remote.version})"
+    end
+  end
+
+end
+