Parsing stdout into a module for display

[darrene]

Is anyone able to provide an example of a simple module that can parse/display a printf output on the mirror? I’m trying to do this but really struggling to understand how to. I can use fprintf to get to a file but that’s not much help to me either.

Ideally I would like to printf a value that will then be displayed in my module on the mirror…

[strawberry 3.141]

@darrene in the node_helper you can do something like that

const spawn = require('child_process').spawn;
const ls = spawn('ls', ['-lh', '/usr']);

ls.stdout.on('data', (data) => {
  console.log(`stdout: ${data}`);
});

ls.stderr.on('data', (data) => {
  console.log(`stderr: ${data}`);
});

ls.on('close', (code) => {
  console.log(`child process exited with code ${code}`);
});

https://nodejs.org/api/child_process.html#child_process_child_process_spawn_command_args_options

[darrene]

Thanks so much @strawberry-3.141, that’s just what I needed to set me in the right direction. I’ll do a bit of reading and follow this approach,. I’ll be sure to post how I get on :)