GHA: Only execute nightly if changes made

.github/actions/check-for-changes-since-tag/action.yml

@@ -0,0 +1,30 @@
+name: 'Check for code changes after a specific tag'
+description: 'Checks if there are any new commits since the specified tag'
+
+inputs:
+  github_token:
+    description: 'GitHub token'
+    required: true
+  tag:
+    description: 'Tag to check'
+    required: true
+
+outputs:
+  has_changes:
+    description: Whether there are new commits since the last tag
+    value: ${{ steps.check_for_changes.outputs.has_changes }}
+
+runs:
+  using: 'composite'
+  steps:
+    - id: check_for_changes
+      shell: bash
+      run: |      
+        # Check if there are any new commits since the tag
+        new_commits=$(git rev-list ${{ inputs.tag }}..HEAD --count)
+
+        if [ $new_commits -gt 0 ]; then
+          echo "has_changes=true" >> $GITHUB_OUTPUT
+        else
+          echo "has_changes=false" >> $GITHUB_OUTPUT
+        fi

.github/workflows/release_nightly.yml

@@ -22,6 +22,7 @@ jobs:
           submodules: recursive
           token: ${{ secrets.GT_DAXMOBILE }}
           fetch-depth: 0
+          ref: feature/david/11-20-gha_only_execute_nightly_if_changes_made
 
       - name: Set up JDK 17
         uses: actions/setup-java@v4
@@ -48,6 +49,19 @@ jobs:
           echo "Latest tag: $output"
           echo "latest_tag=$output" >> $GITHUB_OUTPUT
 
+      - name: Check for changes
+        id: check_for_changes
+        uses: ./.github/actions/check-for-changes
+        with:
+           github_token: ${{ secrets.GT_DAXMOBILE }}
+           tag: ${{ steps.get_latest_tag.outputs.latest_tag }}
+
+      - name: Notify if no changes
+        if: steps.check_for_changes.outputs.has_changes == 'false'
+        run: |
+          echo "No new commits since the last tag. Skipping release notes update."
+          exit 1
+
       - name: Decode upload keys
         uses: davidSchuppa/base64Secret-toFile-action@199e78f212c854d2284fada7f3cd3aba3e37d208
         with: