name: "Set up Swift"
description: Performs necessary steps to set up appropriate Swift version.
inputs:
  codeql-path:
    required: true
runs:
  using: "composite"
  steps:
    - name: Get Swift version
      id: get_swift_version
      # We don't support Swift on Windows or prior versions of CLI.
      if: "(runner.os != 'Windows') && (matrix.version == 'cached' || matrix.version == 'latest' || matrix.version == 'nightly-latest')"
      shell: bash
      env: 
        CODEQL_PATH: ${{inputs.codeql-path}}
      run: |
        if [ $RUNNER_OS = "macOS" ]; then
          PLATFORM="osx64"
        else # We do not run this step on Windows.
          PLATFORM="linux64"
        fi 
        SWIFT_EXTRACTOR_DIR="$("$CODEQL_PATH" resolve languages --format json | jq -r '.swift[0]')"
        VERSION="$("$SWIFT_EXTRACTOR_DIR/tools/$PLATFORM/extractor" --version | awk '/version/ { print $3 }')"
        # Specify 5.7.0, otherwise setup Action will default to latest minor version. 
        if [ $VERSION = "5.7" ]; then
          VERSION="5.7.0"
        fi
        echo "version=$VERSION" | tee -a $GITHUB_OUTPUT
    - uses: swift-actions/setup-swift@194625b58a582570f61cc707c3b558086c26b723
      if: "(runner.os != 'Windows') && (matrix.version == 'cached' || matrix.version == 'latest' || matrix.version == 'nightly-latest')"
      with:
        swift-version: "${{steps.get_swift_version.outputs.version}}"