Function detectInstallMethod

src/node/updater/InstallMethodDetector.ts:31–46

(
  opts: DetectOptions,
)

 * - 'managed' is the catch-all for installs we can't safely modify.
 */
export const detectInstallMethod = async (
  opts: DetectOptions,
): Promise<Exclude<InstallMethod, 'auto'>> => {
  if (opts.override !== 'auto') return opts.override;

  const dockerEnv = opts.dockerEnvPath ?? '/.dockerenv';
  if (await exists(dockerEnv)) return 'docker';

  const gitDir = path.join(opts.rootDir, '.git');
  if (await exists(gitDir) && await writable(opts.rootDir)) return 'git';

  const lockfile = path.join(opts.rootDir, 'package-lock.json');
  if (await exists(lockfile) && await writable(lockfile)) return 'npm';

  return 'managed';
};