anaytics

vite.config.ts

@@ -1,14 +1,44 @@
+import { readFileSync } from 'node:fs'
 import { fileURLToPath } from 'node:url'
 import path from 'node:path'
 import react from '@vitejs/plugin-react'
-import { defineConfig } from 'vite'
+import { defineConfig, type Plugin } from 'vite'
 
 const rootDir = path.dirname(fileURLToPath(import.meta.url))
 const engineDir = path.resolve(rootDir, '../engine')
+const versionPath = path.resolve(rootDir, 'version.json')
+
+// Read once per config evaluation — a dev-server restart (see restartOnVersionJsonChange below)
+// re-imports this whole file, so a version bump is picked up by simply restarting, without any
+// extra caching/invalidation logic here.
+const version = JSON.parse(readFileSync(versionPath, 'utf-8')) as string;
+
+// version.json isn't part of the app's module graph (nothing imports it as JS), so editing it
+// doesn't trigger HMR or Vite's own config-file-triggered restart — only vite.config.ts itself is
+// watched for that. This plugin explicitly watches version.json too and forces a full restart on
+// change, so __APP_VERSION__ (set from `version` below) picks up a version bump without having to
+// stop/start `npm run dev` by hand.
+function restartOnVersionJsonChange(): Plugin {
+  return {
+    name: 'restart-on-version-json-change',
+    configureServer(server) {
+      server.watcher.add(versionPath)
+      server.watcher.on('change', (file) => {
+        if (path.normalize(file) === path.normalize(versionPath)) {
+          server.config.logger.info('version.json changed, restarting to pick up __APP_VERSION__...', { clear: false })
+          server.restart()
+        }
+      })
+    },
+  }
+}
 
 // https://vite.dev/config/
 export default defineConfig({
-  plugins: [react()],
+  plugins: [react(), restartOnVersionJsonChange()],
+  define: {
+    __APP_VERSION__: JSON.stringify(version),
+  },
   resolve: {
     // Follow the node_modules symlink to the real sibling directory, so Vite's dev server
     // watches and transforms the actual engine source files (not a frozen pre-bundled copy).