Function readManifest

src/artifacts/store.ts:139–156

(cwd: string, id: string)

// ── I/O operations (writes go through WriteFn) ────────────────────────────────

async function readManifest(cwd: string, id: string): Promise<ArtifactManifest | null> {
  let raw: string;
  try {
    raw = await fs.readFile(manifestPath(cwd, id), 'utf-8');
  } catch (err: any) {
    // Truly absent → quietly null. Any other read error (permissions, etc.) is
    // NOT "deleted" — surface it rather than masking it.
    if (err?.code === 'ENOENT') return null;
    throw err;
  }
  try {
    return JSON.parse(raw) as ArtifactManifest;
  } catch (err: any) {
    // The manifest exists but is corrupt (e.g. a truncated write). Do NOT report
    // the artifact as absent — that would make it look deleted. Surface it.
    throw new Error(`Artifact "${id}" has a corrupt manifest.json: ${err?.message ?? err}`);
  }
}

/** Resolve a unique id when the slug already exists (append -2, -3, …). */
async function uniqueId(cwd: string, base: string): Promise<string> {