format output for use with casper extension attributes. to use, plug in the app name (Safari.app) as $4 in casper's web interface.

get_app_version.rb

#!/usr/bin/env ruby -wKU
# 110224, revised with loop to accept an array
# 110425, swapped order of variable definition in get_version
# 120405, format output for use as casper extension attribute


def get_version(apps)
  apps.each do |app|
    if app.include?("/Applications/")
      short = app.sub(/\/Applications\//, '')
    elsif app.include?("/Applications/Utilities/")
      short = app.sub(/\/Applications\/Utilities\//, '')
    end
    if File.exists?("#{app}/Contents/Info.plist")
     version = `/usr/bin/defaults read "#{app}"/Contents/Info CFBundleShortVersionString 2> /dev/null`.chomp
     $?.success? ? version : "ERROR: could not get version"
     return version
    else
     version ="#{short} is not installed."
     return version
    end
 end
end


apps = ARGV
if ARGV.size < 4
  puts "<result>pass me an app name</result>"
else
  puts "<result>#{get_version(ARGV[3])}</result>"
 end