Run a detached child process in Deno

I'm looking at running a detached child process using Deno. Specifically I want run something like a script or a web server without needing the parent Deno command staying open.

In node I can achieve it using

spawn

spawn

doing something like this.

// index.js
const { spawn } = require("child_process");

const childProcess = spawn("run-server", [], {
    detached: true,
    stdio: "ignore",
  });

 childProcess.unref();

// index.js
const { spawn } = require("child_process");

const childProcess = spawn("run-server", [], {
    detached: true,
    stdio: "ignore",
  });

 childProcess.unref();

When the parent node command terminates, the child process will continue running.

In Deno the equivalent would be something like this

// index.ts
const child_process = new Deno.Command("run-server", {
  args: [],
  stdio: "ignore"
}).spawn();

child_process.unref();

// index.ts
const child_process = new Deno.Command("run-server", {
  args: [],
  stdio: "ignore"
}).spawn();

child_process.unref();

In Deno though as soon as

unref

unref

is called, the parent deno command terminates which then kills the child process. Is there a way using Deno to achieve the equivalent behaviour I can achieve in node?

Deno•3y ago•

1 reply

Christopher

Run a detached child process in Deno

spawn

spawn

doing something like this.

// index.js
const { spawn } = require("child_process");

const childProcess = spawn("run-server", [], {
    detached: true,
    stdio: "ignore",
  });

 childProcess.unref();

// index.js
const { spawn } = require("child_process");

const childProcess = spawn("run-server", [], {
    detached: true,
    stdio: "ignore",
  });

 childProcess.unref();

When the parent node command terminates, the child process will continue running.

In Deno the equivalent would be something like this

// index.ts
const child_process = new Deno.Command("run-server", {
  args: [],
  stdio: "ignore"
}).spawn();

child_process.unref();

// index.ts
const child_process = new Deno.Command("run-server", {
  args: [],
  stdio: "ignore"
}).spawn();

child_process.unref();

In Deno though as soon as

unref

unref

is called, the parent deno command terminates which then kills the child process. Is there a way using Deno to achieve the equivalent behaviour I can achieve in node?

Run a detached child process in Deno

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