make things Bun-compatible

Author: mb21

README.md

@@ -38,6 +38,11 @@ Either use the [Mastro template for Node.js](https://github.com/mastrojs/templat
 
     pnpm create @mastrojs/mastro@latest
 
+#### Bun
+
+Either use the [Mastro template for Bun](https://github.com/mastrojs/template-basic-bun) or run:
+    bun create @mastrojs/mastro@latest
+
 
 ## Deploy to production
 

create-mastro/README.md

@@ -7,3 +7,7 @@ Create a new [Mastro](https://mastrojs.github.io/) project. Usage:
  Node.js
 
     pnpm create @mastrojs/mastro@latest
+
+Bun
+
+    bun create @mastrojs/mastro@latest

create-mastro/index.js

@@ -17,6 +17,11 @@ import { stdin, stdout } from "node:process";
 import { createInterface } from "node:readline/promises";
 import { Readable } from "node:stream";
 
+const runtime = typeof Deno === "object"
+  ? "deno"
+  // the usual ways to detect Bun don't appear to work in `bun create`
+  : (process.env.npm_config_user_agent?.startsWith("bun") ? "bun" : "node");
+
 /**
  * @param {string} path
  * @param {ReadableStream<Uint8Array<ArrayBuffer>>} data
@@ -50,8 +55,7 @@ const execCmd = (cmd) =>
       }))
   );
 
-const isDeno = typeof Deno === "object";
-const repoName = `template-basic-${isDeno ? "deno" : "node"}`;
+const repoName = `template-basic-${runtime}`;
 const repoUrl = `https://github.com/mastrojs/${repoName}/archive/refs/heads/main.zip`;
 const zipFilePromise = fetch(repoUrl);
 
@@ -80,13 +84,21 @@ if (dir) {
   if (unzipSuccess) {
     await fs.rename(outDir, dir);
 
+    const bunOrPnpm = runtime === "bun" ? "bun" : "pnpm";
+    const installInstr = runtime === "deno"
+      ? ""
+      : `\n\nThen install dependencies with: ${bunOrPnpm} install\n`;
+    const startInstr = runtime === "deno"
+      ? "deno task start"
+      : `${bunOrPnpm} run start`;
+
     const codeStyle = "color: blue";
     console.log(
       `
 Success!
 
-Enter the newly created folder with: %ccd ${dir}${isDeno ? "" : "\n\nThen install dependencies with: pnpm install\n"}
-%cThen start the dev server with: %c${isDeno ? "deno task" : "pnpm run"} start`,
+Enter the newly created folder with: %ccd ${dir}${installInstr}
+%cThen start the dev server with: %c${startInstr}`,
       codeStyle,
       "",
       codeStyle,

src/core/fs.ts

@@ -58,11 +58,21 @@ export const findFiles = async (pattern: string): Promise<string[]> => {
   if (fs) {
     const process = await import("node:process");
     const paths = [];
-    for await (const entry of fs.glob(pattern, { withFileTypes: true })) {
-      if (entry.isFile() && !entry.isSymbolicLink() && !entry.name.endsWith(sep + ".DS_Store")) {
-        const path = entry.parentPath + sep + entry.name;
-        const relativeToProjectRoot = path.slice(process.cwd().length);
-        paths.push(relativeToProjectRoot);
+    if (process.versions.bun) {
+      // until https://github.com/oven-sh/bun/issues/22018 is fixed
+      for await (const file of fs.glob(pattern)) {
+        const entry = await fs.lstat(file);
+        if (entry.isFile() && !entry.isSymbolicLink() && !file.endsWith(sep + ".DS_Store")) {
+          paths.push(sep + file)
+        }
+      }
+    } else {
+      for await (const entry of fs.glob(pattern, { withFileTypes: true })) {
+        if (entry.isFile() && !entry.isSymbolicLink() && !entry.name.endsWith(sep + ".DS_Store")) {
+          const path = entry.parentPath + sep + entry.name;
+          const relativeToProjectRoot = path.slice(process.cwd().length);
+          paths.push(relativeToProjectRoot);
+        }
       }
     }
     return paths;

src/core/router.ts

@@ -1,9 +1,9 @@
 import { findFiles, sep } from "./fs.ts";
 
-if (!globalThis.URLPattern) {
-  // to be implemented by all browsers soon:
-  // see https://wpt.fyi/results/urlpattern?q=label%3Ainterop-2025-urlpattern
-  await import(`https://esm.sh/${'urlpattern-polyfill@10.1.3'}?bundle`);
+// @ts-ignore: Bun and URLPattern
+if (typeof Bun === "object" && !globalThis.URLPattern) {
+  // until https://github.com/oven-sh/bun/issues/2286 is fixed
+  await import("urlpattern" + "-polyfill");
 }
 
 export const paramRegex = /^\[([a-zA-Z0-9\.]+)\]/;

src/generator.ts

@@ -31,22 +31,6 @@ export const generate = async (config?: GenerateConfig): Promise<void> => {
   const { dirname } = await import("node:path");
   const { pathToFileURL } = await import("node:url");
 
-  const writeFile = async (path: string, data: ReadableStream<Uint8Array>) => {
-    if (typeof Deno === "object") {
-      return Deno.writeFile(path, data);
-    } else {
-      const { createWriteStream } = await import("node:fs");
-      const { Readable } = await import("node:stream");
-      return new Promise<void>((resolve, reject) =>
-        // deno-lint-ignore no-explicit-any
-        Readable.fromWeb(data as any)
-          .pipe(createWriteStream(path))
-          .on("finish", resolve)
-          .on("error", reject)
-      );
-    }
-  };
-
   const { outFolder = "generated", pregenerateOnly = false } = config || {};
   const pregenerateAll = !pregenerateOnly;
 
@@ -63,7 +47,22 @@ export const generate = async (config?: GenerateConfig): Promise<void> => {
             await fs.mkdir(dirname(outFilePath), { recursive: true });
             const { body } = file.response;
             if (body) {
-              writeFile(outFilePath, body);
+              if (typeof Deno === "object") {
+                return Deno.writeFile(outFilePath, body);
+              } else if (process.versions.bun) {
+                // deno-lint-ignore no-explicit-any
+                return (globalThis as any).Bun.write(outFilePath, file.response);
+              } else {
+                const { createWriteStream } = await import("node:fs");
+                const { Readable } = await import("node:stream");
+                return new Promise<void>((resolve, reject) =>
+                  // deno-lint-ignore no-explicit-any
+                  Readable.fromWeb(body as any)
+                    .pipe(createWriteStream(outFilePath))
+                    .on("finish", resolve)
+                    .on("error", reject)
+                );
+              }
             }
           }
         }