Function getAppIdentifier

cli/src/telemetry.ts:155–172

* Get a unique anonymous identifier for this app.

(config: Config)

 * Get a unique anonymous identifier for this app.
 */
async function getAppIdentifier(config: Config): Promise<string | null> {
  const { createHash } = await import('crypto');

  // get the first commit hash, which should be universally unique
  const output = await getCommandOutput('git', ['rev-list', '--max-parents=0', 'HEAD'], { cwd: config.app.rootDir });

  const firstLine = output?.split('\n')[0];

  if (!firstLine) {
    debug('Could not obtain unique app identifier');
    return null;
  }

  // use sha1 to create a one-way hash to anonymize
  const id = createHash('sha1').update(firstLine).digest('hex');

  return id;
}

/**
 * Walk through the command's parent tree and construct a space-separated name.