chore: add bun support (#2254)

It definitely has some benefits:
- It starts up insanely quickly compared to Node.
- It can run typescript directly, allow the build step to be reduced to verify/noEmit.

It does not implement NodeJS APIs perfectly, so I've had to add some special handling for Bun, but I think that's okay.

Reviewed-on: #2254
Co-authored-by: Sainan <63328889+Sainan@users.noreply.github.com>
Co-committed-by: Sainan <63328889+Sainan@users.noreply.github.com>

package.json

@@ -8,8 +8,11 @@
     "build": "tsc --incremental --sourceMap && ncp static/webui build/static/webui",
     "build:dev": "tsc --incremental --sourceMap",
     "build-and-start": "npm run build && npm run start",
+    "build-and-start:bun": "npm run verify && npm run bun-run",
     "dev": "node scripts/dev.js",
+    "dev:bun": "bun scripts/dev.js",
     "verify": "tsgo --noEmit",
+    "bun-run": "bun src/index.ts",
     "lint": "eslint --ext .ts .",
     "lint:ci": "eslint --ext .ts --rule \"prettier/prettier: off\" .",
     "lint:fix": "eslint --fix --ext .ts .",

scripts/dev.js

@@ -14,6 +14,7 @@ args.push("--secret");
 args.push(secret);
 
 let buildproc, runproc;
+const spawnopts = { stdio: "inherit", shell: true };
 function run(changedFile) {
     if (changedFile) {
         console.log(`Change to ${changedFile} detected`);
@@ -28,7 +29,8 @@ function run(changedFile) {
         runproc = undefined;
     }
 
-    const thisbuildproc = spawn("npm", ["run", "build:dev"], { stdio: "inherit", shell: true });
+    const thisbuildproc = spawn("npm", ["run", process.versions.bun ? "verify" : "build:dev"], spawnopts);
+    const thisbuildstart = Date.now();
     buildproc = thisbuildproc;
     buildproc.on("exit", code => {
         if (buildproc !== thisbuildproc) {
@@ -36,7 +38,8 @@ function run(changedFile) {
         }
         buildproc = undefined;
         if (code === 0) {
-            runproc = spawn("npm", ["run", "start", "--", ...args], { stdio: "inherit", shell: true });
+            console.log(`${process.versions.bun ? "Verified" : "Built"} in ${Date.now() - thisbuildstart} ms`);
+            runproc = spawn("npm", ["run", process.versions.bun ? "bun-run" : "start", "--", ...args], spawnopts);
             runproc.on("exit", () => {
                 runproc = undefined;
             });

src/services/configWatcherService.ts

@@ -5,7 +5,12 @@ import { config, configPath, loadConfig } from "./configService";
 import { getWebPorts, sendWsBroadcast, startWebServer, stopWebServer } from "./webService";
 
 let amnesia = false;
-fs.watchFile(configPath, () => {
+fs.watchFile(configPath, (now, then) => {
+    // https://github.com/oven-sh/bun/issues/20542
+    if (process.versions.bun && now.mtimeMs == then.mtimeMs) {
+        return;
+    }
+
     if (amnesia) {
         amnesia = false;
     } else {

src/services/webService.ts

@@ -46,16 +46,21 @@ export const startWebServer = (): void => {
                 "Access the WebUI in your browser at http://localhost" + (httpPort == 80 ? "" : ":" + httpPort)
             );
 
-            void runWsSelfTest("wss", httpsPort).then(ok => {
+            // https://github.com/oven-sh/bun/issues/20547
-                if (!ok) {
+            if (!process.versions.bun) {
-                    logger.warn(`WSS self-test failed. The server may not actually be reachable at port ${httpsPort}.`);
+                void runWsSelfTest("wss", httpsPort).then(ok => {
-                    if (process.platform == "win32") {
+                    if (!ok) {
                         logger.warn(
-                            `You can check who actually has that port via powershell: Get-Process -Id (Get-NetTCPConnection -LocalPort ${httpsPort}).OwningProcess`
+                            `WSS self-test failed. The server may not actually be reachable at port ${httpsPort}.`
                         );
+                        if (process.platform == "win32") {
+                            logger.warn(
+                                `You can check who actually has that port via powershell: Get-Process -Id (Get-NetTCPConnection -LocalPort ${httpsPort}).OwningProcess`
+                            );
+                        }
                     }
-                }
+                });
-            });
+            }
         });
     });
 };