Function readMarker

packages/migration-legacy/src/marker.ts:20–33

(sourceHome: string)

}

export async function readMarker(sourceHome: string): Promise<MarkerData | undefined> {
  try {
    const text = await readFile(migratedMarker(sourceHome), 'utf-8');
    const parsed = JSON.parse(text) as Partial<MarkerData>;
    if (parsed.version !== 1) return undefined;
    // A partially-written or hand-edited marker may keep `version` but lack a
    // valid `runs` array; treating it as absent avoids `appendMarkerRun`
    // throwing on `[...existing.runs, run]` and aborting a healthy rerun.
    if (!Array.isArray(parsed.runs)) return undefined;
    return parsed as MarkerData;
  } catch {
    return undefined;
  }
}

export async function writeMarker(
  sourceHome: string,