From 455d1bbb92133a42ede0eeb02debcd6977d9617e Mon Sep 17 00:00:00 2001
From: Paulus Schoutsen <balloob@gmail.com>
Date: Thu, 17 Jun 2021 11:06:16 -0700
Subject: [PATCH] Hash entrypoint to avoid caching

---
 build-scripts/rollup/manifest-plugin.js | 22 +++++++++++++++
 raw_package/__init__.py                 |  5 ++++
 rollup.config.js                        | 36 ++++++++++++++++---------
 3 files changed, 50 insertions(+), 13 deletions(-)
 create mode 100644 build-scripts/rollup/manifest-plugin.js

diff --git a/build-scripts/rollup/manifest-plugin.js b/build-scripts/rollup/manifest-plugin.js
new file mode 100644
index 00000000..e5b55566
--- /dev/null
+++ b/build-scripts/rollup/manifest-plugin.js
@@ -0,0 +1,22 @@
+export default function (userOptions = {}) {
+  return {
+    name: "manifest",
+    generateBundle(outputOptions, bundle) {
+      const manifest = {};
+
+      for (const chunk of Object.values(bundle)) {
+        if (!chunk.isEntry) {
+          continue;
+        }
+        manifest[chunk.name] = chunk.fileName;
+      }
+
+      this.emitFile({
+        type: "asset",
+        source: JSON.stringify(manifest, undefined, 2),
+        name: "manifest.json",
+        fileName: "manifest.json",
+      });
+    },
+  };
+}
diff --git a/raw_package/__init__.py b/raw_package/__init__.py
index 0da9d71b..307c755c 100644
--- a/raw_package/__init__.py
+++ b/raw_package/__init__.py
@@ -1,7 +1,12 @@
 """ESPHome dashboard."""
 from pathlib import Path
+import json
 
 
 def where():
     """Return path to the frontend."""
     return Path(__file__).parent
+
+def entrypoint():
+    manifest = json.loads((where() / "static/js/esphome/manifest.json").read_text())
+    return manifest['index']
diff --git a/rollup.config.js b/rollup.config.js
index caf41402..70239f85 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -2,27 +2,37 @@ import { nodeResolve } from "@rollup/plugin-node-resolve";
 import { terser } from "rollup-plugin-terser";
 import json from "@rollup/plugin-json";
 import typescript from "@rollup/plugin-typescript";
+import manifest from "./build-scripts/rollup/manifest-plugin";
 
+const isProdBuild = process.env.NODE_ENV === "production";
+
+/**
+ * @type { import("rollup").MergedRollupOptions }
+ */
 const config = {
   input: "src/index.ts",
   output: {
     dir: "esphome_dashboard/static/js/esphome/",
     format: "module",
+    entryFileNames: isProdBuild ? "[name]-[hash].js" : "[name].js",
+    chunkFileNames: isProdBuild ? "c.[hash].js" : "[name].js",
+    assetFileNames: isProdBuild ? "a.[hash].js" : "[name].js",
   },
   preserveEntrySignatures: false,
-  plugins: [typescript(), nodeResolve(), json()],
+  plugins: [
+    typescript(),
+    nodeResolve(),
+    json(),
+    manifest(),
+    isProdBuild &&
+      terser({
+        ecma: 2019,
+        toplevel: true,
+        output: {
+          comments: false,
+        },
+      }),
+  ].filter(Boolean),
 };
 
-if (process.env.NODE_ENV === "production") {
-  config.plugins.push(
-    terser({
-      ecma: 2019,
-      toplevel: true,
-      output: {
-        comments: false,
-      },
-    })
-  );
-}
-
 export default config;