Make Swift setup more consistent with default setup

.github/actions/setup-swift/action.yml

@@ -1,5 +1,5 @@
-name: "Set up Swift"
+name: "Set up Swift on Linux"
-description: Sets up an appropriate Swift version if supported on this platform.
+description: Sets up an appropriate Swift version on Linux.
 inputs:
   codeql-path:
     description: Path to the CodeQL CLI executable.
@@ -9,21 +9,16 @@ runs:
   steps:
     - name: Get Swift version
       id: get_swift_version
-      if: runner.os != 'Windows'
+      if: runner.os == 'Linux'
       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]')"
         if [ $SWIFT_EXTRACTOR_DIR = "null" ]; then
           VERSION="null"
         else
-          VERSION="$("$SWIFT_EXTRACTOR_DIR/tools/$PLATFORM/extractor" --version | awk '/version/ { print $3 }')"
+          VERSION="$("$SWIFT_EXTRACTOR_DIR/tools/linux64/extractor" --version | awk '/version/ { print $3 }')"
           # Specify 5.x.0, otherwise setup Action will default to latest minor version. 
           if [ $VERSION = "5.7" ]; then
             VERSION="5.7.0"
@@ -37,6 +32,6 @@ runs:
         echo "version=$VERSION" | tee -a $GITHUB_OUTPUT
 
     - uses: swift-actions/setup-swift@65540b95f51493d65f5e59e97dcef9629ddf11bf # Please update the corresponding SHA in the CLI's CodeQL Action Integration Test.
-      if: runner.os != 'Windows' && steps.get_swift_version.outputs.version != 'null'
+      if: runner.os == 'Linux' && steps.get_swift_version.outputs.version != 'null'
       with:
         swift-version: "${{ steps.get_swift_version.outputs.version }}"

.github/workflows/__export-file-baseline-information.yml

@@ -62,7 +62,7 @@ jobs:
         CODEQL_FILE_BASELINE_INFORMATION: true
     - uses: ./../action/.github/actions/setup-swift
       with:
-        codeql-path: ${{steps.init.outputs.codeql-path}}
+        codeql-path: ${{ steps.init.outputs.codeql-path }}
     - name: Build code
       shell: bash
       run: ./build.sh

pr-checks/checks/export-file-baseline-information.yml

@@ -11,7 +11,7 @@ steps:
       CODEQL_FILE_BASELINE_INFORMATION: true
   - uses: ./../action/.github/actions/setup-swift
     with:
-      codeql-path: ${{steps.init.outputs.codeql-path}}
+      codeql-path: ${{ steps.init.outputs.codeql-path }}
   - name: Build code
     shell: bash
     run: ./build.sh