Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -22,8 +22,6 @@ before_script:
       sleep 5
     done
 
-
-
 build:
   needs:
     - test
@@ -33,14 +31,23 @@ build:
     - docker build -t $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_REF_SLUG .
     - docker tag $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_REF_SLUG $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_SHORT_SHA
     - docker tag $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_REF_SLUG $CI_REGISTRY/$CI_PROJECT_PATH:latest
+
 push:
   needs:
     - build
   stage: push
   script:
-    - echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" --password-stdin $CI_REGISTRY
+    - |
-    - docker push $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_REF_SLUG
+      CURRENT_IMAGE_HASH=$(docker inspect --format='{{index .RepoDigests 0}}' $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_REF_SLUG)
-    - docker push $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_SHORT_SHA
+      EXISTING_IMAGE_HASH=$(curl -s --header "PRIVATE-TOKEN: $CI_JOB_TOKEN" "https://gitlab.com/api/v4/projects/$CI_PROJECT_ID/registry/repositories/1/tags/$CI_COMMIT_REF_SLUG" | jq -r '.digest')
-    - docker push $CI_REGISTRY/$CI_PROJECT_PATH:latest
+      if [ "$CURRENT_IMAGE_HASH" != "$EXISTING_IMAGE_HASH" ]; then
+        echo "Image has changed, pushing to the registry..."
+        echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" --password-stdin $CI_REGISTRY
+        docker push $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_REF_SLUG
+        docker push $CI_REGISTRY/$CI_PROJECT_PATH:$CI_COMMIT_SHORT_SHA
+        docker push $CI_REGISTRY/$CI_PROJECT_PATH:latest
+      else
+        echo "Image is unchanged, skipping push."
+      fi
   only:
     - main