Quick way to use a CLI from a node express app

express-cli-exec.js

// the utility function to query pachyderm job completion data

const runPachctlCommand = (args: string[], callback: Function) => {
    console.log('Running 🐘🐘🐘 Pachctl 🐘🐘🐘');
  
      args.push('--raw');
      args.push('|');
      args.push('jq');
      // might need to make this next line `-sr` depending on
      // whether you want to slurp or not
      args.push('-r'); 
      args.push('.');
  
    const line = args.join(' ');

    // spawn a pachctl line 
    const child = spawn('sh', ['-c', `pachctl ${line}`]);

    let scriptOutput = '';

    child.stdout.setEncoding('utf8');
    // Read pachctl output -> in json
    child.stdout.on('data', function (data: any) {
        data = data.toString();
        scriptOutput += data;
    });

    child.stderr.setEncoding('utf8');
    // Errors, if any
    child.stderr.on('data', function (data: any) {
        data = data.toString();
        scriptOutput += data;
    });

    // Send the output back to the caller
    child.on('close', function (code: number) {
        // code is typically the exit code of the execution,
        // should be 0 if everything went well
        callback(scriptOutput, code);
    });
};

// an example express GET request handler 

app.get('/getEncodingJobStats', async (req, res) => {
    runPachctlCommand(['list', 'job'], function (output: any, exitCode: any) {
        res.send(output);
    });
});