[OSX] optional #eval support (experimental)

lib/motion/project/builder.rb

@@ -454,6 +454,14 @@ EOS
         copy_resource(res_path, File.join(app_resources_dir, res))
       end
 
+      # Optional support for #eval (OSX-only).
+      if config.respond_to?(:eval_support) and config.eval_support
+        repl_dylib_path = File.join(datadir, platform, 'libmacruby-repl.dylib')
+        dest_path = File.join(app_resources_dir, File.basename(repl_dylib_path))
+        copy_resource(repl_dylib_path, dest_path)
+        preserve_resources << File.basename(repl_dylib_path)
+      end
+
       # Delete old resource files.
       resources_files = resources_paths.map { |x| path_on_resources_dirs(config.resources_dirs, x) }
       Dir.chdir(app_resources_dir) do

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

@@ -30,7 +30,7 @@ module Motion; module Project;
     register :osx
 
     variable :icon, :copyright, :category, :embedded_frameworks,
-        :codesign_for_development
+        :codesign_for_development, :eval_support
 
     def initialize(project_dir, build_mode)
       super
@@ -40,6 +40,7 @@ module Motion; module Project;
       @frameworks = ['AppKit', 'Foundation', 'CoreGraphics']
       @embedded_frameworks = []
       @codesign_for_development = false
+      @eval_support = false
     end
 
     def platforms; ['MacOSX']; end