Summary:
This diff adds snapshot `diff-api-snapshot` script for public JS API breaking change detection.
### Motivation
Detecting if there are any breaking changes introduced in the commit. It is achieved by comparing `ReactNativeApi.d.ts` rollup from the current and previous revision.
This is a naive implementation with a three possible outcomes:
- BREAKING
- POTENTIALLY_NOT_BREAKING,
- NOT_BREAKING
The algorithm analyses exported top-level statements (after inlining) in both rollups and tries to create a mapping between them by name.
The **BREAKING** outcome happens whenever the statement is:
- removed
- renamed
- changed
- not exported anymore (private)
The **POTENTIALLY_NOT_BREAKING** outcome happens if it's not BREAKING and the new statement is added.
The **NOT_BREAKING** outcome happens if public API snapshot doesn't change.
Changelog:
[General][Added] - Add public JS API breaking change detection under `yarn diff-api-snapshot` script.
Pull Request resolved: https://github.com/facebook/react-native/pull/51972
Test Plan:
Signals, added tests.
In `react-native-github` run:
`yarn test scripts/diff-api-snapshot/__tests__/diffApiSnapshot-test.js`
Rollback Plan:
Reviewed By: j-piasecki
Differential Revision: D76430965
Pulled By: coado
fbshipit-source-id: 095a196aa4f643501db0af9262556ddefff5d30d
Dawid Małecki