lib_shenzhen_commands_pget.rb

command :pget do |c|
  c.syntax = 'ipa pget <key> [options]'
  c.summary = 'Retrieve a value in a plist'
  c.description = ''
  c.option '-p', '--plist FILE', "plist file to update"


  c.action do |args, options|
    @key = args.count > 0 ? args[0] : 'CFBundleShortVersionString'
    determine_plist! unless @plist = options.plist
    say_error "Missing or unspecified .plist file" and abort unless @plist and File.exist?(@plist)

    puts Shenzhen::PlistBuddy.print(@plist, @key)
  end

end

lib_shenzhen_commands_plists.rb

private

def determine_plist!
  plist = Dir["**/*-Info.plist"].reject {|p|p =~ /^Libraries\// || p =~ /^bin\//}
  @plist ||= case plist.length
            when 0 then nil
            when 1 then plist.first
            else
              @plist = choose "Select a plist File:", *plist
            end
end

lib_shenzhen_commands_pset.rb

command :pset do |c|
  c.syntax = 'ipa pset <key> <value> [options]'
  c.summary = 'Set the value in a plist'
  c.description = ''
  c.option '-p', '--plist FILE', "plist file to update"

  c.action do |args, options|
    say_error "Missing key and value" and abort unless args.count == 2
    key, value = args

    determine_plist! unless @plist = options.plist
    say_error "Missing or unspecified .plist file" and abort unless @plist and File.exist?(@plist)

    value = Shenzhen::PlistBuddy.set(@plist, key, value)
    say_error "Key '#{key}' not found in #{@plist}" and abort if value.nil?
  end
end

lib_shenzhen_plistbuddy.rb

module Shenzhen::PlistBuddy
  class << self
    def print(file, key)
      output = `/usr/libexec/PlistBuddy -c "Print :#{key}" "#{file}" 2> /dev/null`

      !output || output.empty? || /Does Not Exist/ === output ? nil : output.strip
    end

    def set(file, key, value)
      output = `/usr/libexec/PlistBuddy -c "Set #{key} #{value}" "#{file}" 2>&1`
      output == "" ? value : nil
    end
  end
end