Fix Swift PR Checks on nightly-latest CLI (#1696)

Author: angelapwen

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

@@ -1,5 +1,5 @@
 name: "Set up Swift"
-description: Sets up an appropriate Swift version if Swift is enabled via CODEQL_ENABLE_EXPERIMENTAL_FEATURES_SWIFT.
+description: Sets up an appropriate Swift version if supported on this platform.
 inputs:
   codeql-path:
     description: Path to the CodeQL CLI executable.
@@ -9,24 +9,29 @@ runs:
   steps:
     - name: Get Swift version
       id: get_swift_version
-      if: env.CODEQL_ENABLE_EXPERIMENTAL_FEATURES_SWIFT == 'true'
+      if: runner.os != 'Windows'
       shell: bash
       env: 
         CODEQL_PATH: ${{ inputs.codeql-path }}
       run: |
-        if [ $RUNNER_OS = "macOS" ]; then
+        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"
+        if [ $SWIFT_EXTRACTOR_DIR = "null" ]; then
+          VERSION="null"
+        else
+          VERSION="$("$SWIFT_EXTRACTOR_DIR/tools/$PLATFORM/extractor" --version | awk '/version/ { print $3 }')"
+          # Specify 5.7.0, otherwise setup Action will default to latest minor version. 
+          if [ $VERSION = "5.7" ]; then
+            VERSION="5.7.0"
+          fi
         fi
         echo "version=$VERSION" | tee -a $GITHUB_OUTPUT
+
     - uses: swift-actions/setup-swift@65540b95f51493d65f5e59e97dcef9629ddf11bf # Please update the corresponding SHA in the CLI's CodeQL Action Integration Test.
-      if: env.CODEQL_ENABLE_EXPERIMENTAL_FEATURES_SWIFT == 'true'
+      if: runner.os != 'Windows' && steps.get_swift_version.outputs.version != 'null'
       with:
         swift-version: "${{ steps.get_swift_version.outputs.version }}"

.github/workflows/__analyze-ref-input.yml

@@ -49,11 +49,16 @@ jobs:
         with:
           go-version: ^1.13.1
       - uses: ./../action/init
+        id: init
         with:
           tools: ${{ steps.prepare-test.outputs.tools-url }}
           debug: true
           debug-artifact-name: my-debug-artifacts
           debug-database-name: my-db
+      - uses: ./../action/.github/actions/setup-swift
+        if: matrix.version == 'nightly-latest'
+        with:
+          codeql-path: ${{ steps.init.outputs.codeql-path }}
       - name: Build code
         shell: bash
         run: ./build.sh

.github/workflows/__autobuild-action.yml

@@ -66,7 +66,9 @@ steps:
       fi
 
   - name: Check language autodetect for Swift
-    if: env.CODEQL_ENABLE_EXPERIMENTAL_FEATURES_SWIFT == 'true'
+    if: >- 
+      env.CODEQL_ENABLE_EXPERIMENTAL_FEATURES_SWIFT == 'true' || 
+          (runner.os != 'Windows' && matrix.version == 'nightly-latest')
     shell: bash
     run: |
       SWIFT_DB=${{ fromJson(steps.analysis.outputs.db-locations).swift }}

.github/workflows/__config-export.yml

@@ -83,8 +83,7 @@ def writeHeader(checkStream):
                     matrix.version == '20220908' ||
                     matrix.version == '20221211' ||
                     matrix.version == 'cached' ||
-                    matrix.version == 'latest' ||
-                    matrix.version == 'nightly-latest'
+                    matrix.version == 'latest'
                 )
             ''').strip()),
             'shell': 'bash',