name: prepare-hermes-workspace
description: This action prepares the hermes workspace with the right hermes and react-native versions.
inputs:
  hermes-ws-dir:
    required: true
    description: The hermes dir we need to use to setup the workspace
  hermes-version-file:
    required: true
    description: the path to the file that will contain the hermes version
outputs:
  hermes-version:
    description: the version of Hermes tied to this run
    value: ${{ steps.hermes-version.outputs.VERSION }}
  react-native-version:
    description: the version of React Native tied to this run
    value: ${{ steps.react-native-version.outputs.VERSION }}
runs:
  using: composite
  steps:
    - name: Setup hermes version
      shell: bash
      id: hermes-version
      run: |
        mkdir -p "/tmp/hermes" "/tmp/hermes/download" "/tmp/hermes/hermes"

        if [ -f "${{ inputs.hermes-version-file }}" ]; then
          echo "Hermes Version file found! Using this version for the build:"
          echo "VERSION=$(cat ${{ inputs.hermes-version-file }})" >> "$GITHUB_OUTPUT"
        else
          echo "Hermes Version file not found!!!"
          echo "Using the last commit from main for the build:"
          HERMES_TAG_SHA=$(git ls-remote https://github.com/facebook/hermes main | cut -f 1 | tr -d '[:space:]')
          echo "VERSION=$HERMES_TAG_SHA" >> "$GITHUB_OUTPUT"
        fi
        echo "Hermes commit is $HERMES_TAG_SHA"

    - name: Get react-native version
      shell: bash
      id: react-native-version
      run: |
        VERSION=$(cat packages/react-native/package.json | jq -r '.version')
        # Save the react native version we are building in an output variable so we can use that file as part of the cache key.
        echo "VERSION=$VERSION" >> "$GITHUB_OUTPUT"
        echo "React Native Version is $VERSION"

    - name: Cache hermes workspace
      id: restore-hermes
      uses: actions/cache/restore@v4
      with:
        path: |
          /tmp/hermes/download/
          /tmp/hermes/hermes/
        key: v1-hermes-${{ steps.hermes-version.outputs.version }}
        enableCrossOsArchive: true

    # It happened while testing that a cache was created from the right folders
    # but those folders where empty. Thus, the next check ensures that we can work with those caches.
    - name: Check if cache was meaningful
      id: meaningful-cache
      shell: bash
      run: |
        if [[ -d /tmp/hermes/hermes ]] && [[ -n "$(ls -A /tmp/hermes/hermes)"  ]]; then
          echo "Found a good hermes cache"
          echo "HERMES_CACHED=true" >> "$GITHUB_OUTPUT"
        fi

    - name: Setup node.js
      uses: ./.github/actions/setup-node
    - name: Yarn- Install Dependencies
      if: ${{ steps.meaningful-cache.outputs.HERMES_CACHED != 'true' }}
      uses: ./.github/actions/yarn-install

    - name: Download Hermes tarball
      if: ${{ steps.meaningful-cache.outputs.HERMES_CACHED != 'true' }}
      shell: bash
      run: |
        node packages/react-native/scripts/hermes/prepare-hermes-for-build ${{ github.event.pull_request.html_url }}
        cp packages/react-native/sdks/download/* ${{ inputs.hermes-ws-dir }}/download/.
        cp -r packages/react-native/sdks/hermes/* ${{ inputs.hermes-ws-dir }}/hermes/.

        echo ${{ steps.hermes-version.outputs.version }}

    - name: Upload Hermes artifact
      uses: actions/upload-artifact@v4.3.4
      with:
        name: hermes-workspace
        path: |
          /tmp/hermes/download/
          /tmp/hermes/hermes/

    - name: Cache hermes workspace
      uses: actions/cache/save@v4
      if: ${{ github.ref == 'refs/heads/main' }} # To avoid that the cache explode.
      with:
        path: |
          /tmp/hermes/download/
          /tmp/hermes/hermes/
        key: v1-hermes-${{ steps.hermes-version.outputs.version }}
        enableCrossOsArchive: true