Spawn a child process

Use Bun.spawn() to spawn a child process.

const proc = Bun.spawn(["echo", "hello"]);

// await completion
await proc.exited;

The second argument is a configuration object.

const proc = Bun.spawn(["echo", "Hello, world!"], {
  cwd: "/tmp",
  env: { FOO: "bar" },
  onExit(proc, exitCode, signalCode, error) {
    // exit handler
  },
});

By default, proc.stdout is a ReadableStream of the child process’s stdout.

const proc = Bun.spawn(["echo", "hello"]);

const output = await proc.stdout.text();
output; // => "hello\n"

See Child processes.

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Spawn a child process