versionNameを指定したstage名で更新していくactionです

commit_version_name_stage_bump.rb

module Fastlane
  module Actions
    class CommitVersionNameStageBumpAction < Action
      PATH = 'app/build.gradle'

      def self.run(params)
        UI.message "Stage Name: #{params[:stage_name]}"

        stage_name = params[:stage_name]

        file_string = File.read(PATH)
        pattern = /versionName\ "([A-Za-z0-9\-.]+)"/
        version_name = file_string[pattern, 1]
        UI.message "current version name: #{version_name}"

        new_version_name = get_bumped_version_name(version_name, stage_name)
        UI.message "new version name: #{new_version_name}"

        file_string[pattern, 1] = new_version_name

        new_file_string = File.new(PATH, 'w')
        new_file_string.write(file_string)
        new_file_string.close

        commit(new_version_name)
      end

      def self.get_bumped_version_name(version_name, stage_name)
        pattern = /(\d+).(\d+).(\d+)[A-Za-z\-.]*(\d+)?$/

        major = version_name[pattern, 1].to_i
        minor = version_name[pattern, 2].to_i
        patch = version_name[pattern, 3].to_i
        # 値が取れなかった場合はnilが返り、to_iで0になる
        stage = version_name[pattern, 4].to_i

        unless version_name.include? stage_name
          stage = 0
        end
        stage += 1

        "#{major}.#{minor}.#{patch}-#{stage_name}.#{stage}"
      end

      def self.commit(version_name)
        Actions.sh("git add #{PATH}")
        Actions.sh("git commit -m 'VersionName Bump to #{version_name}'")
      end

      def self.available_options
        [
          FastlaneCore::ConfigItem.new(key: :stage_name,
                                       description: "alphaやbetaなどの名前です",
                                       verify_block: proc do |value|
                                          UI.user_error!("stage_nameを設定して下さい") unless (value and not value.empty?)
                                       end)
        ]
      end

      def self.authors
        ["@mapyo"]
      end

      def self.is_supported?(platform)
        platform == :android
      end
    end
  end
end