appengine gem versions

require "date"
gem_names = []
gem_names += %w(google-appengine appengine-tools appengine-sdk appengine-rack appengine-jruby-jars appengine-apis rack)
#gem_names += %w(rack rails activesupport actionpack erubis builder i18n)
#gem_names += %w(sinatra)

["gem", "jgem"].each do |gem_command|
  puts "appengine gem versions[#{gem_command}]: #{Time.now}"
  cmd = "#{gem_command} list"
  #puts cmd
  gems = `#{cmd}`.split("\n").collect{|v| v.strip }.sort
  gems.each do |gem|
    if gem =~ /^(\S+) \((.+)\)$/
      name = $1
      next unless gem_names.include?(name)
      versions = $2.split(",").collect{|v| v.strip }.sort
      puts "  #{name}"
      versions.each do |version|
        cmd = "#{gem_command} specification #{name} -v #{version} | grep date:"
        #puts cmd
        date = Date.parse(`#{cmd}`[/(\d\d\d\d-\d\d-\d\d)/, 1])
        puts "    %-12s %s" % [version, date.strftime("%Y-%m-%d")]
      end
    end
  end
end

% ruby gae_jruby_versions.rb
appengine gem versions[gem]: Wed Jan 20 15:02:36 +0900 2010
  appengine-apis
    0.0.12       2009-12-21
  appengine-jruby-jars
    0.0.6        2009-12-21
    0.0.7.pre    2009-12-15
  appengine-rack
    0.0.6        2009-12-21
  appengine-sdk
    1.3.0        2009-12-21
  appengine-tools
    0.0.8        2010-01-16
  google-appengine
    0.0.8        2010-01-15
  rack
    1.0.1        2009-10-18
appengine gem versions[jgem]: Wed Jan 20 15:02:44 +0900 2010
  appengine-apis
    0.0.12       2009-12-21
  appengine-jruby-jars
    0.0.6        2009-12-21
    0.0.7.pre    2009-12-15
  appengine-rack
    0.0.6        2009-12-21
  appengine-sdk
    1.3.0        2009-12-21
  appengine-tools
    0.0.8        2010-01-16
  google-appengine
    0.0.8        2010-01-15
  rack
    1.0.1        2009-10-18