Renovate PR comparison for deployment.

.gitea/workflows/renovate-pr-deploy.yml

@@ -49,40 +49,49 @@ jobs:
           echo "::warning::This PR does not involve patch/minor/major/digest update. Skipping deployment."
           exit 0
 
-      - name: Get changed services from docker-compose.yml
-        id: services
+      - name: Save docker-compose.yml before merge (old)
         run: |
-          git fetch origin ${{ github.event.pull_request.base.ref }}
-
-          # Extract image refs (service -> image) from base and head
-          yq -r '.services | to_entries[] | "\(.key)=\(.value.image // "")"' docker-compose.yml \
-            | sort > services_head.txt
-
-          git show origin/${{ github.event.pull_request.base.ref }}:docker-compose.yml \
-            | yq -r '.services | to_entries[] | "\(.key)=\(.value.image // "")"' \
-            | sort > services_main.txt
-
-          echo "Comparing images between base and head..."
-          touch service_changes.txt
-
-          while IFS== read -r svc img; do
-            base_img=$(grep "^$svc=" services_main.txt | cut -d= -f2- || true)
-            if [ "$img" != "$base_img" ]; then
-              echo "$svc" >> service_changes.txt
-            fi
-          done < services_head.txt
-
-          echo "Detected service changes:"
-          cat service_changes.txt || true
-
-          mod_svcs=$(sort -u service_changes.txt)
-          if [ -z "$mod_svcs" ]; then
-            echo "::warning::No service image changes detected. Skipping selective deployment."
+          git fetch origin main
+          if git ls-tree -r origin/main^1 --name-only | grep -q '^docker-compose.yml$'; then
+            git show origin/main^1:docker-compose.yml > docker-compose-old.yml
+          else
+            echo "services: {}" > docker-compose-old.yml
           fi
 
-          echo "docker_svc_list<<EOF" >> "$GITHUB_OUTPUT"
-          echo "$mod_svcs" >> "$GITHUB_OUTPUT"
-          echo "EOF" >> "$GITHUB_OUTPUT"
+      - name: Save docker-compose.yml after merge (new)
+        run: |
+          git show origin/main:docker-compose.yml > docker-compose-new.yml
+
+      - name: Detect services with image tag/digest changes
+        id: detect_services
+        run: |
+          set -euo pipefail
+
+          echo "Flattening docker-compose files..."
+          yq eval '... comments=""' docker-compose-old.yml > docker-compose-old-flat.yml
+          yq eval '... comments=""' docker-compose-new.yml > docker-compose-new-flat.yml
+
+          echo "Getting service names..."
+          yq eval '.services | keys | .[]' docker-compose-old-flat.yml | sort > services_old.txt
+          yq eval '.services | keys | .[]' docker-compose-new-flat.yml | sort > services_new.txt
+
+          echo "Checking for image changes..."
+          : > service_changes.txt
+
+          comm -12 services_old.txt services_new.txt | while read service; do
+            old_image=$(yq eval ".services.\"$service\".image // \"\"" docker-compose-old-flat.yml)
+            new_image=$(yq eval ".services.\"$service\".image // \"\"" docker-compose-new-flat.yml)
+
+            if [ "$old_image" != "$new_image" ]; then
+              echo "$service" >> service_changes.txt
+            fi
+          done
+
+          echo "Detected services with changed images:"
+          cat service_changes.txt || true
+
+          mod_svcs=$(sort -u service_changes.txt | xargs echo -n)
+          echo "docker_svc_list=$mod_svcs" >> "$GITHUB_OUTPUT"
 
       - name: List of Services for (Re)Deployment
         run: |