1
// Copyright (c) 2026 Cloudflare, Inc.
2
// Licensed under the Apache 2.0 license found in the LICENSE file or at:
3
//     https://opensource.org/licenses/Apache-2.0
4
 
5
declare namespace MetadataReader {
6
  export interface CompatibilityFlags {
7
    experimental?: boolean;
8
    python_workflows?: boolean;
9
    python_no_global_handlers?: boolean;
10
    python_workers_force_new_vendor_path?: boolean;
11
    python_dedicated_snapshot?: boolean;
12
    enable_python_external_sdk?: boolean;
13
    python_check_rng_state?: boolean;
14
    python_workflows_implicit_dependencies?: boolean;
15
    python_process_pth_files?: boolean;
16
  }
17
 
18
  const isWorkerd: () => boolean;
19
  const isTracing: () => boolean;
20
  const shouldSnapshotToDisk: () => boolean;
21
  const isCreatingBaselineSnapshot: () => boolean;
22
  const shouldAbortIsolateOnFatalError: () => boolean;
23
  const getRequirements: () => string[];
24
  const getMainModule: () => string;
25
  const hasMemorySnapshot: () => boolean;
26
  const getNames: () => string[];
27
  const getPackageSnapshotImports: (version: string) => string[];
28
  const getSizes: () => number[];
29
  const readMemorySnapshot: (
30
    offset: number,
31
    buf: Uint32Array | Uint8Array
32
  ) => void;
33
  const getMemorySnapshotSize: () => number;
34
  const disposeMemorySnapshot: () => void;
35
  const getPyodideVersion: () => string;
36
  const getPackagesVersion: () => string;
37
  const getPackagesLock: () => string;
38
  const read: (index: number, position: number, buffer: Uint8Array) => number;
39
  const getTransitiveRequirements: () => Set<string>;
40
  const getCompatibilityFlags: () => CompatibilityFlags;
41
  const setCpuLimitNearlyExceededCallback: (
42
    buf: Uint8Array,
43
    sig_clock: number,
44
    sig_flag: number
45
  ) => void;
46
  const constructor: {
47
    getBaselineSnapshotImports(): string[];
48
  };
49
}
50
 
51
export default MetadataReader;