gpasq / deno-exec Goto Github PK

When running with Deno 1.3.0, the Tee and StdOut modes seem to have no effect.

import { exec, OutputMode } from "https://deno.land/x/[email protected]/mod.ts";

const p1 = await exec('bash -c echo one && sleep 1 && echo two', { output: OutputMode.Tee }); // displays nothing
console.log(await p1.output); // displays nothing
const p2 = await exec('bash -c echo one && sleep 1 && echo two', { output: OutputMode.StdOut }); // displays nothing
console.log(await p2.output); // displays nothing

Commands starting with bash -c ... seem to have an impact. Running something simple, like exec('echo hello', { output: OutputMode.StdOut }); works as expected. So does this command bash --help, so it's probably not related to calling bash itself

Either lock the version of the uuid package or update it to reflect the latest version of the package.

I am encountering an error on line 51
TypeError: v4.generate is not a function

The current 0.0.5 version can not return stderrResult.

The version released through deno x will be accelerated by CDN, so please release a new version.

I think this was supposed to read "in a case like this"

When you think of piping in a case list this, you often think of something like

It would be nice if exec would provide a quick way to get something similar to that without that extra function:

async function run(cwd: string, ...cmd: string[]): Promise<Deno.ProcessStatus> {
	const p = Deno.run({
		cmd,
		cwd,
		stdout: "piped",
		stderr: "piped"
	})
	for await (const line of io.readLines(p.stdout)) {
		console.info(`[ ${cmd[0]} ] ${line}`)
	}
	for await (const line of io.readLines(p.stderr)) {
		console.error(`[ ${cmd[0]} ] ${line}`)
	}
	const status: Deno.ProcessStatus = await p.status()
	if(!status.success) {
		throw new Error(`[ ${cmd[0]} ] failed with exit code ${status.code}`)
	}
	return status
}

I'm running something like this:

	await run.exec(`ssh ${sshAlias} [ -w /vars ]`, {
		output: run.OutputMode.StdOut,
		verbose: true,
		continueOnError: false
	})

which should fail (/vars does not exist on my server, it's just a test). Using the run function above I would get an error message and an exception is thrown, the same is not true for exec. I get just verbose log, no output and the script continues despite the error.

When the command ran with exec('the command') has a large response await process.status() never resolves, blocking exec from resolving also.

I noticed this bug when running some git command that returned a long file list. I've managed to reproduce the problem with an arbitrary large text file and running exec('ls long.txt')

To reproduce;

• Google for something random
• Copy-paste the entire browser window into a text file like a brute. Repeat until you have 10000 lines
• Save as long.txt
• Create a file with the following Deno code

  import { exec } from 'https://deno.land/x/[email protected]/mod.ts';
  
  (async () => {
    console.log('Started');
    try {
    	await exec('cat long.txt');
    } catch (error) {
    	console.log(error.message);
    }
    console.log('Done');
  })();

• Run deno run --allow-run isolated-test.ts

(Alternatively, you can just execute the Deno code and modify it to run curl https://pastebin.com/raw/WYvij310, which is a sufficiently large file found somewhere on the internet)

Expected

• Either "Done" or an error message is console.logged

Observed

• Only "Started" is logged, code execution never gets past await exec nor does it throw an error

Is stderr ignored? I have some commands failing, but I don't see any output.

Setting the cwd is the only thing I find I often need to set

I know that we can do bash -c '... for piping scenarios, but this is not platform independent. It would be nice if natural piping was supported in this lib as a feature.

If you want to implement your own piping within the app, you can (currently) capture the output of one exec call and pass it to the next.

How do I use stdin with exec?

Currently when I tried to run commands with heredoc it errored out.

I want to know if something like can be executed using exec

cat << EOF
The current working directory is: $PWD
You are logged in as: $(whoami)
EOF

Ref: https://linuxize.com/post/bash-heredoc/

We are getting this error, please advise.

error: TS2339 [ERROR]: Property 'randomUUID' does not exist on type 'Crypto'.
--
  | return crypto.randomUUID();
at https://deno.land/[email protected]/uuid/v4.ts:30:17