get terminal response and store it as a variable in node js

Question

In the middle of my Node.js file I want to store the terminal response of docker run -v ${PWD}/app.py:/app.py proj1part1dockerimage in my file and store the output as a var. How would i go about getting a terminal response without opening a terminal?

Answer 1

In node.js everything is asynchronous, so you have to use a callback:

child_process.exec("docker run -v ${PWD}/app.py:/app.py proj1part1dockerimage",
  (err, stdout, stderr) => {
    const output = stdout.toString();
  }
)

But if you require it to be instant which I don't recommend:

const output = child_process.execSync("docker run -v ${PWD}/app.py:/app.py proj1part1dockerimage").toString();