How to get the output of a js file from bash?

Question

Suppose I have a js file (which can be executed using node):

process.stdout.write('Test')

Is there any way I can use this in a bash file? For example, to set the PS1?

Here is what I tried:

#!/usr/bin/env bash

get_output() {
    return node path/to/file.js
}


export PS1='$ $get_output >'

I'm pretty sure this shows you I am a bash newbie...

Does this answer your question? [BASH print result of linux command in PS1 variable](https://stackoverflow.com/questions/60000157/bash-print-result-of-linux-command-in-ps1-variable) — dibery, Jun 14 '21 at 05:26
@Siddhart : See the section titled _Command Substitution_ in the bash man page. BTW. it is quite uncommon to put `PS1` into the environment. Are you sure that this is what you want? — user1934428, Jun 14 '21 at 06:00

thanatonian2311 · Answer 1 · 2021-06-14T05:30:18.427

1

You can take the output of a command using the $ parens operator.

export PS1=$(node path/to/file.js)

edited Jun 14 '21 at 05:30

answered Jun 14 '21 at 05:17

thanatonian2311

Please don't promote the obsolescent backtick syntax. – tripleee Jun 14 '21 at 05:27
Ahh TIL. Corrected the answer to reflect this. – thanatonian2311 Jun 14 '21 at 05:30

1 Answers1