plugins/homePage: added plugin:serve and dev setup

plugins/home-page/dev/index.tsx

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import React, { FC } from 'react';
+import ReactDOM from 'react-dom';
+import { BrowserRouter } from 'react-router-dom';
+import HomeIcon from '@material-ui/icons/Home';
+import { ThemeProvider, CssBaseline } from '@material-ui/core';
+import {
+  createApp,
+  SidebarPage,
+  Sidebar,
+  SidebarItem,
+  SidebarSpacer,
+} from '@backstage/core';
+import { lightTheme } from '@backstage/theme';
+import { plugin } from '../src/plugin';
+
+const app = createApp();
+app.registerPlugin(plugin);
+const AppComponent = app.build();
+
+const App: FC<{}> = () => {
+  return (
+    <ThemeProvider theme={lightTheme}>
+      <CssBaseline>
+        <BrowserRouter>
+          <SidebarPage>
+            <Sidebar>
+              <SidebarSpacer />
+              <SidebarItem icon={HomeIcon} to="/home" text="Home" />
+            </Sidebar>
+            <AppComponent />
+          </SidebarPage>
+        </BrowserRouter>
+      </CssBaseline>
+    </ThemeProvider>
+  );
+};
+
+ReactDOM.render(<App />, document.getElementById('root'));

plugins/home-page/package.json

@@ -7,6 +7,7 @@
   "private": true,
   "scripts": {
     "build": "backstage-cli plugin:build",
+    "start": "backstage-cli plugin:serve",
     "lint": "backstage-cli lint",
     "test": "backstage-cli test",
     "clean": "backstage-cli clean"
@@ -18,7 +19,8 @@
     "@testing-library/user-event": "^7.1.2",
     "@types/jest": "^24.0.0",
     "@types/node": "^12.0.0",
-    "@types/testing-library__jest-dom": "5.0.2"
+    "@types/testing-library__jest-dom": "5.0.2",
+    "react-router-dom": "^5.1.2"
   },
   "dependencies": {
     "@backstage/core": "^0.1.1-alpha.4",

plugins/home-page/tsconfig.json

@@ -1,6 +1,6 @@
 {
   "extends": "../../tsconfig.json",
-  "include": ["src"],
+  "include": ["src", "dev"],
   "compilerOptions": {
     "baseUrl": "src"
   }