command-exists-promise

command-exists-promise

Node module to check if a command-line command exists. Forked from command-exists.

Installation

# For npm users
$ npm i command-exists-promise

# For yarn users
$ yarn add command-exists-promise

Usage

The function returns a promise that will resolve to true if the command exists and false if it doesn't.
On UNIX, the promise will resolve to true if the command is a path to an executable file. On Windows, it will resolve to true for any existing file.

Promise

const commandExists = require('command-exists-promise')

commandExists('ls')
  .then(exists => {
    if (exists) {
      // The command exists
    } else {
      // The command doesn't exist
    }
  })
  .catch(err => {
    // Should never happen but better handle it just in case
  })

Await

const commandExists = require('command-exists-promise')

try {
  const exists = await commandExists('ls')
  if (exists) {
    // The command exists
  } else {
    // The command doesn't exist
  }
} catch (err) {
  // Should never happen but better handle it just in case
}