prefix-terminal-output.ts

function prefixTerminalOutput(cp: ChildProcess, prefix: string) {
  function logWithPrefix(data: string) {
    if (!data) {
      return;
    }
    console.log(
      data
        .split('\n')
        .map((line) => `${prefix} ${line}`)
        .join('\n')
    );
  }
  cp.stdout.on('data', logWithPrefix);
  cp.stdout.on('error', logWithPrefix);
  cp.stderr.on('data', logWithPrefix);
  cp.stderr.on('error', logWithPrefix);
}

function padTargetName(name: string, targetSize: number) {
  const builder = [`${name}`];
  builder.push(' '.repeat(Math.floor((targetSize - name.length) / 2)));
  builder.unshift(' '.repeat(Math.ceil((targetSize - name.length) / 2)));
  builder.push(' ');
  return builder.join('');
}