Use Gulp to index demos (#6203)

.github/workflows/ci.yaml

@@ -34,10 +34,8 @@ jobs:
         run: yarn install
         env:
           CI: true
-      - name: Build icons
+      - name: Build resources
-        run: ./node_modules/.bin/gulp gen-icons-json
+        run: ./node_modules/.bin/gulp gen-icons-json build-translations gather-gallery-demos
-      - name: Build translations
-        run: ./node_modules/.bin/gulp build-translations
       - name: Run eslint
         run: ./node_modules/.bin/eslint '{**/src,src}/**/*.{js,ts,html}' --ignore-path .gitignore
       - name: Run tsc

build-scripts/gulp/gallery.js

@@ -1,7 +1,10 @@
 // Run demo develop mode
 const gulp = require("gulp");
+const fs = require("fs");
+const path = require("path");
 
 const env = require("../env");
+const paths = require("../paths");
 
 require("./clean.js");
 require("./translations.js");
@@ -12,6 +15,31 @@ require("./service-worker.js");
 require("./entry-html.js");
 require("./rollup.js");
 
+gulp.task("gather-gallery-demos", async function gatherDemos() {
+  const files = await fs.promises.readdir(
+    path.resolve(paths.gallery_dir, "src/demos")
+  );
+
+  let content = "export const DEMOS = {\n";
+
+  for (const file of files) {
+    const demoId = path.basename(file, ".ts");
+    const demoPath = "../src/demos/" + demoId;
+    content += `  "${demoId}": () => import("${demoPath}"),\n`;
+  }
+
+  content += "};";
+
+  const galleryBuild = path.resolve(paths.gallery_dir, "build");
+
+  fs.mkdirSync(galleryBuild, { recursive: true });
+  fs.writeFileSync(
+    path.resolve(galleryBuild, "import-demos.ts"),
+    content,
+    "utf-8"
+  );
+});
+
 gulp.task(
   "develop-gallery",
   gulp.series(
@@ -20,7 +48,11 @@ gulp.task(
     },
     "clean-gallery",
     "translations-enable-merge-backend",
-    gulp.parallel("gen-icons-json", "build-translations"),
+    gulp.parallel(
+      "gen-icons-json",
+      "build-translations",
+      "gather-gallery-demos"
+    ),
     "copy-static-gallery",
     "gen-index-gallery-dev",
     env.useRollup() ? "rollup-dev-server-gallery" : "webpack-dev-server-gallery"
@@ -35,7 +67,11 @@ gulp.task(
     },
     "clean-gallery",
     "translations-enable-merge-backend",
-    gulp.parallel("gen-icons-json", "build-translations"),
+    gulp.parallel(
+      "gen-icons-json",
+      "build-translations",
+      "gather-gallery-demos"
+    ),
     "copy-static-gallery",
     env.useRollup() ? "rollup-prod-gallery" : "webpack-prod-gallery",
     "gen-index-gallery-prod"

gallery/src/ha-gallery.js

@@ -11,9 +11,7 @@ import { PolymerElement } from "@polymer/polymer/polymer-element";
 import "../../src/components/ha-card";
 import "../../src/managers/notification-manager";
 import "../../src/styles/polymer-ha-style";
-
+import { DEMOS } from "../build/import-demos";
-// eslint-disable-next-line no-undef
-const DEMOS = require.context("./demos", true, /^(.*\.(ts$))[^.]*$/im);
 
 const fixPath = (path) => path.substr(2, path.length - 5);
 
@@ -163,7 +161,7 @@ class HaGallery extends PolymerElement {
       },
       _demos: {
         type: Array,
-        value: DEMOS.keys().map(fixPath),
+        value: Object.keys(DEMOS),
       },
       _lovelaceDemos: {
         type: Array,
@@ -210,7 +208,7 @@ class HaGallery extends PolymerElement {
     while (root.lastChild) root.removeChild(root.lastChild);
 
     if (demo) {
-      DEMOS(`./${demo}.ts`);
+      DEMOS[demo]();
       const el = document.createElement(demo);
       root.appendChild(el);
     }