Allow users to override admin templates on a file by file basis

padrino-admin/lib/padrino-admin/generators/admin_app.rb

@@ -18,6 +18,15 @@ def self.banner; "padrino-gen admin"; end
       include Thor::Actions
       include Padrino::Generators::Actions
       include Padrino::Generators::Admin::Actions
+
+      # Look for custom template files in a generators folder under the project root
+      def source_paths
+        if File.exists? destination_root('generators', 'templates')
+          ["#{destination_root('generators')}", File.expand_path(File.dirname(__FILE__))]
+        else
+          [File.expand_path(File.dirname(__FILE__))]
+        end
+      end
 
       desc "Description:\n\n\tpadrino-gen admin generates a new Padrino Admin application"
 

padrino-admin/lib/padrino-admin/generators/admin_page.rb

@@ -20,6 +20,15 @@ def self.banner; "padrino-gen admin_page [model]"; end
       include Padrino::Generators::Actions
       include Padrino::Generators::Admin::Actions
 
+      # Look for custom template files in a generators folder under the project root
+      def source_paths
+        if File.exists? destination_root('generators')
+          ["#{destination_root('generators')}", File.expand_path(File.dirname(__FILE__))]
+        else
+          [File.expand_path(File.dirname(__FILE__))]
+        end
+      end
+
       desc "Description:\n\n\tpadrino-gen admin_page model(s)"
       argument :models, :desc => "The name(s) of your model(s)", :type => :array
       class_option :skip_migration, :aliases => "-s", :default => false, :type => :boolean

padrino-admin/test/generators/test_admin_app_generator.rb

@@ -53,6 +53,15 @@
       assert_match_in_file 'role.project_module :accounts, \'/accounts\'', "#{@apptmp}/sample_project/admin/app.rb"
     end
 
+    # users can override certain templates from a generators/templates folder in the destination_root
+    it "should use custom generator templates from the project root, if they exist" do
+      capture_io { generate(:project, 'sample_project', "--root=#{@apptmp}", '-d=activerecord') }
+      custom_template_path = "#{@apptmp}/sample_project/generators/templates/slim/app/layouts/"
+      `mkdir -p #{custom_template_path} && echo "h1 = 'Hello, custom generator' " > #{custom_template_path}application.slim.tt`
+      capture_io { generate(:admin_app, "--root=#{@apptmp}/sample_project") }
+      assert_match_in_file(/Hello, custom generator/, "#{@apptmp}/sample_project/admin/views/layouts/application.slim")
+    end
+
     it "should generate the admin app under a different folder" do
       # TODO FIXME Implement option --admin_root or something. See https://github.com/padrino/padrino-framework/issues/854#issuecomment-14749356
       skip

padrino-admin/test/generators/test_admin_page_generator.rb

@@ -46,6 +46,17 @@ def self.properties
       assert_match_in_file "elsif Padrino.env == :development && params[:bypass]", "#{@apptmp}/sample_project/admin/controllers/sessions.rb"
     end
 
+    # users can override certain templates from a generators/templates folder in the destination_root
+    it "should use custom generator templates from the project root, if they exist" do
+      capture_io { generate(:project, 'sample_project', "--root=#{@apptmp}", '-d=datamapper','-e=haml') }
+      custom_template_path = "#{@apptmp}/sample_project/generators/templates/haml/page/"
+      `mkdir -p #{custom_template_path} && echo "%h1= 'Hello, custom generator' " > #{custom_template_path}index.haml.tt`
+      capture_io { generate(:admin_app, "--root=#{@apptmp}/sample_project") }
+      capture_io { generate(:model, 'person', "name:string", "age:integer", "email:string", "--root=#{@apptmp}/sample_project") }
+      capture_io { generate(:admin_page, 'person', "--root=#{@apptmp}/sample_project") }
+      assert_match_in_file(/Hello, custom generator/, "#{@apptmp}/sample_project/admin/views/people/index.haml")
+    end
+
     describe "renderers" do
       it 'should correctly generate a new page with haml' do
         capture_io { generate(:project, 'sample_project', "--root=#{@apptmp}", '-d=datamapper','-e=haml') }