skpm / child_process Goto Github PK

The pid property is always 0 in my testing.

var subprocess = spawn('mycmd')
subprocess.pid // => 0

It looks like calling processIdentifier() before launch() will give you a 0:

var task = NSTask.alloc().init()
task.processIdentifier() // => 0

result.pid is being set to String(task.processIdentifier()) but this happens before launch() is called because that is done via setImmediate() here:

The readme says all child_process methods are supported, but I don't see fork

I noticed this while playing around, and I can't quite figure out the cause. When running certain commands asynchronously, the module fails to release the fiber it opens, which causes a large memory leak. Further, the commands never return any values. For example:

exec('/bin/ps', null, (error, stdout, stderr) => {
  log(`DEBUG: ${stdout}`);
  log(`DEBUG: ${stderr}`);
});

Will hang and cause Sketch to eat memory, as well as fill up the Console really quickly:

The output I would expect is:

❯ ps
  PID TTY           TIME CMD
16534 ttys001    0:02.87 /usr/local/bin/zsh -l
10772 ttys003    0:02.60 /usr/local/bin/zsh -l
30746 ttys003    0:00.29 node /usr/local/Cellar/yarn/1.13.0/libexec/bin/yarn.js watch
30088 ttys005    0:00.74 /usr/local/bin/zsh --login

Hi,

i need to run code in nodejs. So my idea was to spawn a nodejs process and communicate with it by sending jsonl messages to stdin (you call it sdtin) & getting jsonl messages back from stdout.

But when i attempt to write to stdin it just crashes sketch. No crash reports in console.

const child = spawn(
	path.resolve(process.cwd(), "./Contents/Sketch/external"),
	[],
	{cwd: path.resolve(process.cwd(), "./Contents/Sketch")},
);

// @ts-ignore
const stdin: Writable = child.stdin || child.sdtin;

const buf = Buffer.from(JSON.stringify({type: "getImages"}) + "\n");
console.log("buf", buf);

await new Promise<void>((onOk, onErr) => {
	// crashes here
	stdin.write(buf, (err) => {
		if (err !== null && err !== undefined) {
			onErr(err);
		} else {
			onOk();
		}
	});
});

I called exec in my Sketch Plugin, but the return value cannot be returned completely, it can only return 4060 characters. Can you help me?