const {spawn} = require('child_process')

const exec = async function exec(cmd, args = []) {

const child = spawn(cmd, args, {shell: true})

redirectOutputFor(child) await waitFor(child) } const redirectOutputFor = (child) => { const printStdout = (data) => { process.stdout.write(data.toString()) } const printStderr = (data) => { process.stderr.write(data.toString()) } child.stdout.on('data', printStdout) child.stderr.on('data', printStderr) child.once('close', () => { child.stdout.off('data', printStdout) child.stderr.off('data', printStderr) }) }

const waitFor = async function (child) {

return new Promise((resolve) => { child.once('close', () => resolve()) }) }

const execSync = require('child_process').execSync const sha512 = (filename) => { const output = execSync(`sha512sum ${filename} | cut -f1 | xxd -r -p | base64`) //console.log(output) let sha512 = output.toString().split('\n').join('').trim() //sha512 = sha512.substring(0, sha512.length - 1) //console.log(sha512) return sha512

}

module.exports.sha512 = sha512 module.exports.exec = exec