Function parseLatestTagFromLocation

src/upgrade/index.ts:209–213

(location: string | undefined)

 * `/releases/latest` → `…/releases/tag/v0.9.9`. Pure so it's unit-tested.
 */
export function parseLatestTagFromLocation(location: string | undefined): string | null {
  if (!location) return null;
  const m = /\/releases\/tag\/([^/?#]+)/.exec(location);
  return m ? decodeURIComponent(m[1]!) : null;
}

// ---------------------------------------------------------------------------
// Latest-version resolution (network)