Function runGitCommand

tools/find-inactive-collaborators.mjs:20–48

(cmd, mapFn)

const SINCE = args.positionals[0] || '12 months ago';

async function runGitCommand(cmd, mapFn) {
  const childProcess = cp.spawn('/bin/sh', ['-c', cmd], {
    cwd: new URL('..', import.meta.url),
    encoding: 'utf8',
    stdio: ['inherit', 'pipe', 'inherit'],
  });
  const lines = readline.createInterface({
    input: childProcess.stdout,
  });
  const errorHandler = new Promise(
    (_, reject) => childProcess.on('error', reject),
  );
  let returnValue = mapFn ? new Set() : '';
  await Promise.race([errorHandler, Promise.resolve()]);
  // If no mapFn, return the value. If there is a mapFn, use it to make a Set to
  // return.
  for await (const line of lines) {
    await Promise.race([errorHandler, Promise.resolve()]);
    if (mapFn) {
      const val = mapFn(line);
      if (val) {
        returnValue.add(val);
      }
    } else {
      returnValue += line;
    }
  }
  return Promise.race([errorHandler, Promise.resolve(returnValue)]);
}

// Get all commit contributors during the time period.
const contributors = await runGitCommand(