add_icon_overlay.rb

module Fastlane
  module Actions

    class AddIconOverlayAction < Action
      def self.run(params)
        #Helper.log.info "Image to overlay on icons: #{params[:overlay_image_path]}"

        require 'mini_magick'

        appiconset = params[:appiconset_path]
  
        #overlay_image = MiniMagick::Image.new(params[:overlay_image_path])

        Dir.glob(File.join(appiconset, '*.png')) do |icon|
          original_icon = MiniMagick::Image.new(icon)

          #result = original_icon.composite(overlay_image) do |c|
            #c.compose "Over"
            #c.resize "#{original_icon.width}x#{original_icon.height}"
            #c.quality 100
          #end
          
          width = original_icon.width
          height = original_icon.height
          rect_height = 10
          x = width / 1.5
          text_size = width / 8
          padding = text_size / 2

          result = original_icon.combine_options do |c|
            #c.fill('#FF00FF')
            #c.draw "rotate -45 rectangle #{x},#{x},1,1"
            c.fill('#FFFFFF')
            c.gravity 'Northeast'
            c.draw "rotate 45 text #{text_size + padding},#{text_size + padding} 'BETA'"
            c.pointsize "#{text_size}"
            #c.font 'Helvetica' # must be in font list `convert -list font`
          end
          result.write icon
        end
      end

      #####################################################
      # @!group Documentation
      #####################################################

      def self.description
        "Overlays an image over all icons."
      end

      def self.details
        "Overlays an image over all icons, using ImageMagick and replacing the old icons."
      end

      def self.available_options
        [
          FastlaneCore::ConfigItem.new(key: :appiconset_path,
                                       env_name: "FL_ADD_ICON_OVERLAY_APPICONSET_PATH",
                                       description: "Path for .appiconset containing the icons",
                                       is_string: true,
                                       default_value: '**/AppIcon.appiconset'
                                       ),
          FastlaneCore::ConfigItem.new(key: :overlay_text,
                                       env_name: "FL_ADD_ICON_OVERLAY_TEXT",
                                       description: "Text to overlay over the icons",
                                       is_string: true,
                                       default_value: 'BETA'
                                       )
        ]
      end

      def self.output
      end

      def self.return_value
        # If you method provides a return value, you can describe here what it does
      end

      def self.authors
        # So no one will ever forget your contribution to fastlane :) You are awesome btw!
        ["marcelofabri", "squarefrog"]
      end

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