Update detect-api-changes.yml

Author: goergisn

.github/workflows/detect-api-changes.yml

@@ -31,29 +31,28 @@ jobs:
       uses: actions/checkout@v4
       with:
         fetch-depth: 0
-
+        
     - name: 👾 Define Diff Versions
       run: |
-        NEW="${{ env.source }}~${{ env.githubRepo }}"
-        if [[ '${{ github.head_ref || env.noTargetBranch }}' == release/* ]]
+        NEW="${{ env.source }}~${{ env.headGithubRepo }}"
+        OLD="${{ env.target }}~${{ env.baseGithubRepo }}"
+        
+        if [[ '${{ env.targetBranchName || env.noTargetBranch }}' == release/* ]]
         then
             LATEST_TAG=$(git describe --tags --abbrev=0)
-            OLD="$LATEST_TAG~${{ env.githubRepo }}"
-        else
-            OLD="${{ env.target }}~${{ env.githubRepo }}"
+            OLD="$LATEST_TAG~${{ env.baseGithubRepo }}" 
         fi
         
-        echo "OLD=$OLD"
-        echo "NEW=$NEW"
-        
         # Providing the output to the environment
         echo "OLD_VERSION=$OLD" >> $GITHUB_ENV
         echo "NEW_VERSION=$NEW" >> $GITHUB_ENV
       env:
         source: '${{ github.event.inputs.new || github.head_ref }}'
         target: '${{ github.event.inputs.old || github.event.pull_request.base.ref }}'
-        githubRepo: '${{github.server_url}}/${{github.repository}}.git'
+        headGithubRepo: '${{github.server_url}}/${{ github.event.pull_request.head.repo.full_name || github.repository}}.git'
+        baseGithubRepo: '${{github.server_url}}/${{github.repository}}.git'
         noTargetBranch: 'no target branch'
+        targetBranchName: '${{ github.head_ref }}'
 
     - name: 🧰 Build Swift CLI
       run: swift build --configuration release