backup_info_plist.rb

module Fastlane
  module Actions
    class BackupInfoPlistAction < Action
      def self.run params
        plist_path = params[:plist_path]
        FileUtils.cp(plist_path, "#{plist_path}.back", {:preserve => true})
      end

      def self.details
        'This action backup your "Info.plist".'
      end

      def self.is_supported?(platform)
        true
      end

      def self.author
        "gin0606"
      end

      def self.available_options
        [
          FastlaneCore::ConfigItem.new(key: :plist_path,
                                       env_name: "",
                                       description: "File name you want to back up",
                                       optional: false),
        ]
      end
    end
  end
end

restore_info_plist.rb

module Fastlane
  module Actions
    class RestoreInfoPlistAction < Action
      def self.run params
        plist_path = params[:plist_path]
        backup_plist_path = "#{plist_path}.back"
        raise "not exist #{backup_plist_path}" unless File.exist? backup_plist_path
        FileUtils.cp(backup_plist_path, plist_path, {:preserve => true})
        FileUtils.rm(backup_plist_path)
      end

      def self.details
        'This action restore your "Info.plist" that backuped in `backup_info_plist` action.'
      end

      def self.is_supported?(platform)
        true
      end

      def self.author
        "gin0606"
      end

      def self.available_options
        [
          FastlaneCore::ConfigItem.new(key: :plist_path,
                                       env_name: "",
                                       description: "Original file name you want to restore",
                                       optional: false),
        ]
      end
    end
  end
end