Test the cURL download from JS script

download_curl.js

const fs = require('fs');
const { spawn } = require('child_process');
const path = require('path');

const download_file = (file_url) => {

    // create url and filename variables
    const url = new URL(file_url);
    const fileName = url.pathname.split('/').pop();

    const savedFilePath = path.join(__dirname, fileName);
  
    // create an instance of writable stream
    const file = fs.createWriteStream(savedFilePath);
  
    // execute curl using child_process' spawn function
    const curl = spawn('curl', ['-#fL', url.toString()]);
    // add a 'data' event listener for the spawn instance
    curl.stdout.on('data', function(data) { file.write(data); });
    // add an 'end' event listener to close the writeable stream
    curl.stdout.on('end', function(data) {
        file.end();
        console.log('File from:\n\x1b[33m' + url.toString() + '\n\x1b[0mhas been downloaded to\n\x1b[33m' + savedFilePath+'\x1b[0m');
    });
    // when the spawn child process exits, check if there were any errors and close the writeable stream
    curl.on('exit', function(code) {
        if (code != 0) {
            console.log('Failed: ' + code);
        }
    });
};

download_file("https://github.com/elm/compiler/releases/download/0.19.1/binary-for-linux-64-bit.gz");