action.yml

name: diff-js-api-breaking-changes
description: Check for breaking changes in the public React Native JS API
runs:
  using: composite
  steps:
    - name: Fetch snapshot from PR head
      shell: bash
      env:
        SCRATCH_DIR: ${{ runner.temp }}/diff-js-api-breaking-changes
      run: |
        mkdir $SCRATCH_DIR
        git fetch --depth=1 origin ${{ github.event.pull_request.head.sha }}
        git show ${{ github.event.pull_request.head.sha }}:packages/react-native/ReactNativeApi.d.ts > $SCRATCH_DIR/ReactNativeApi-after.d.ts \
          || echo "" > $SCRATCH_DIR/ReactNativeApi.d.ts
    - name: Run breaking change detection
      shell: bash
      env:
        SCRATCH_DIR: ${{ runner.temp }}/diff-js-api-breaking-changes
      run: |
        # Check if the file was changed in this PR, if not, exit early without saving to the output.json
        git diff --name-status
        git diff --name-status | awk '{print $2}'
        git diff --name-status | awk '{print $2}' | grep 'packages/react-native/ReactNativeApi.d.ts' || echo "ReactNativeApi.d.ts not found, exiting" && exit 0

        node ./scripts/js-api/diff-api-snapshot \
        ${{ github.workspace }}/packages/react-native/ReactNativeApi.d.ts  \
        $SCRATCH_DIR/ReactNativeApi-after.d.ts \
        > $SCRATCH_DIR/output.json