[xcassets] Copy and configure the app icons for iOS.

lib/motion/project/builder.rb

@@ -343,17 +343,20 @@ EOS
       end
 
       # Compile Asset Catalog bundles.
-      xcassets = []
-      config.resources_dirs.each do |dir|
-        xcassets.concat(Dir.glob(File.join(dir, '*.xcassets'))) if File.exist?(dir)
-      end
+      xcassets = config.xcassets_bundles
       unless xcassets.empty?
-        xcassets.map! { |f| File.expand_path(f) }
         sh "\"#{config.xcode_dir}/usr/bin/actool\" --output-format human-readable-text " \
            "--notices --warnings --platform #{config.deploy_platform.downcase} " \
            "--minimum-deployment-target #{config.deployment_target} " \
            "#{Array(config.device_family).map { |d| "--target-device #{d}" }.join(' ')} " \
            "--compress-pngs --compile \"#{File.expand_path(bundle_path)}\" \"#{xcassets.join('" "')}\""
+        # App icons still need to be handled as always, so we need to copy those
+        # into the app bundle.
+        if icons = config.app_icons_from_xcassets
+          icons.each do |image_src, image_dest_filename|
+            copy_resource(image_src, File.join(bundle_path, image_dest_filename))
+          end
+        end
       end
 
       # Compile CoreData Model resources and SpriteKit atlas files.
@@ -420,12 +423,7 @@ EOS
         if reserved_app_bundle_files.include?(res)
           App.fail "Cannot use `#{res_path}' as a resource file because it's a reserved application bundle file"
         end
-        dest_path = File.join(app_resources_dir, res)
-        if !File.exist?(dest_path) or File.mtime(res_path) > File.mtime(dest_path)
-          FileUtils.mkdir_p(File.dirname(dest_path))
-          App.info 'Copy', res_path
-          FileUtils.cp_r(res_path, dest_path)
-        end
+        copy_resource(res_path, File.join(app_resources_dir, res))
       end
 
       # Delete old resource files.
@@ -435,6 +433,7 @@ EOS
           next if File.directory?(bundle_res)
           next if reserved_app_bundle_files.include?(bundle_res)
           next if resources_files.include?(bundle_res)
+          next if config.icons.include?(File.basename(bundle_res))
           App.warn "File `#{bundle_res}' found in app bundle but not in resource directories, removing"
           FileUtils.rm_rf(bundle_res)
         end
@@ -466,6 +465,14 @@ EOS
       eval `#{@nfd} "#{string}"`
     end
 
+    def copy_resource(res_path, dest_path)
+      if !File.exist?(dest_path) or File.mtime(res_path) > File.mtime(dest_path)
+        FileUtils.mkdir_p(File.dirname(dest_path))
+        App.info 'Copy', res_path
+        FileUtils.cp_r(res_path, dest_path)
+      end
+    end
+
     class << self
       def common_build_dir
         dir = File.expand_path("~/Library/RubyMotion/build")

lib/motion/project/template/ios/config.rb

@@ -38,7 +38,6 @@ module Motion; module Project;
       @interface_orientations = [:portrait, :landscape_left, :landscape_right]
       @background_modes = []
       @status_bar_style = :default
-      @icons = []
       @prerendered_icon = false
       @manifest_assets = []
     end
@@ -57,6 +56,38 @@ module Motion; module Project;
       end
     end
 
+    def icons
+      @icons ||= app_icons_from_xcassets.map(&:last)
+    end
+
+    def app_icons_from_xcassets
+      unless @app_icons_from_xcassets
+        @app_icons_from_xcassets = []
+        app_icon_sets = xcassets_bundles.map { |b| Dir.glob(File.join(b, '*.appiconset')) }.flatten
+        if app_icon_sets.size > 1
+          # TODO should we just App.fail here?
+          $stderr.puts '[!] More than one AppIcon set was found across all xcasset bundles. Only the first one (alphabetically) will be used.'
+        end
+        if app_icon_set = app_icon_sets.sort.first
+          app_icon_filename = File.basename(app_icon_set, File.extname(app_icon_set))
+          # TODO need to think how to solve this on stock OS X Ruby 1.8.7, which
+          # doesn’t come with JSON.
+          require 'json'
+          images = JSON.parse(File.read(File.join(app_icon_set, 'Contents.json')))['images']
+          images.each do |image|
+            if image_src = image['filename']
+              image_src = File.join(app_icon_set, image_src)
+              if File.exist?(image_src)
+                image_filename = "#{app_icon_filename}#{image['size']}@#{image['scale']}.png"
+                @app_icons_from_xcassets << [image_src, image_filename]
+              end
+            end
+          end
+        end
+      end
+      @app_icons_from_xcassets
+    end
+
     def validate
       # icons
       if !(icons.is_a?(Array) and icons.all? { |x| x.is_a?(String) })

lib/motion/project/template/osx/config.rb

@@ -67,6 +67,10 @@ module Motion; module Project;
       archs
     end
 
+    # TODO no-op for now
+    def app_icons_from_xcassets
+    end
+
     def locate_compiler(platform, *execs)
       execs.each do |exec|
         cc = File.join('/usr/bin', exec)

lib/motion/project/xcode_config.rb

@@ -322,5 +322,15 @@ EOS
       path = File.join(xcode_dir, 'usr/bin/TextureAtlas')
       File.exist?(path) ? path : nil
     end
+
+    def xcassets_bundles
+      xcassets_bundles = []
+      resources_dirs.each do |dir|
+        if File.exist?(dir)
+          xcassets_bundles.concat(Dir.glob(File.join(dir, '*.xcassets')))
+        end
+      end
+      xcassets_bundles
+    end
   end
 end; end