1 files changed, 44 insertions, 0 deletions
diff --git a/packages/create-astro/src/shell.ts b/packages/create-astro/src/shell.ts
new file mode 100644
index 000000000..4941d788c
--- /dev/null
+++ b/packages/create-astro/src/shell.ts
@@ -0,0 +1,44 @@
+// This is an extremely simplified version of [`execa`](https://github.com/sindresorhus/execa)
+// intended to keep our dependency size down
+import type { StdioOptions } from 'node:child_process';
+import type { Readable } from 'node:stream';
+
+import { text as textFromStream } from 'node:stream/consumers';
+import { spawn } from 'node:child_process';
+import { setTimeout as sleep } from 'node:timers/promises';
+
+export interface ExecaOptions {
+    cwd?: string | URL;
+    stdio?: StdioOptions;
+    timeout?: number;
+}
+export interface Output {
+    stdout: string;
+    stderr: string;
+    exitCode: number;
+}
+const text = (stream: NodeJS.ReadableStream | Readable | null) => stream ? textFromStream(stream).then(t => t.trimEnd()) : '';
+
+export async function shell(command: string, flags: string[], opts: ExecaOptions = {}): Promise<Output> {
+    const controller = opts.timeout ? new AbortController() : undefined;
+    const child = spawn(command, flags, {
+        cwd: opts.cwd,
+        shell: true,
+        stdio: opts.stdio,
+        signal: controller?.signal
+    })
+    const stdout = await text(child.stdout);
+    const stderr = await text(child.stderr);
+    if (opts.timeout) {
+        sleep(opts.timeout).then(() => {
+            controller!.abort();
+            throw { stdout, stderr, exitCode: 1 }
+        })
+    }
+    await new Promise((resolve) => child.on('exit', resolve))
+    const { exitCode } = child;
+    if (exitCode !== 0) {
+        throw { stdout, stderr, exitCode };
+    }
+    return { stdout, stderr, exitCode }
+}