1 files changed, 28 insertions, 0 deletions
diff --git a/Library/Homebrew/cmd/outdated.rb b/Library/Homebrew/cmd/outdated.rb
new file mode 100644
index 000000000..37fba0f99
--- /dev/null
+++ b/Library/Homebrew/cmd/outdated.rb
@@ -0,0 +1,28 @@
+require 'formula'
+
+module Homebrew extend self
+  def outdated
+    outdated_brews.each do |keg, name, version|
+      if $stdout.tty? and not ARGV.flag? '--quiet'
+        versions = keg.cd{ Dir['*'] }.join(', ')
+        puts "#{name} (#{versions} < #{version})"
+      else
+        puts name
+      end
+    end
+  end
+
+  def outdated_brews
+    HOMEBREW_CELLAR.subdirs.map do |rack|
+      # Skip kegs with no versions installed
+      next unless rack.subdirs
+
+      # Skip HEAD formulae, consider them "evergreen"
+      next if rack.subdirs.map{ |keg| keg.basename.to_s }.include? "HEAD"
+
+      name = rack.basename.to_s
+      f = Formula.factory name rescue nil
+      [rack, name, f.version] if f and not f.installed?
+    end.compact
+  end
+end
+\ No newline at end of file