Refactor GitLab CI/CD pipelines

.gitlab-ci.yml

@@ -1,6 +1,7 @@
 image: docker:20.10@sha256:2967f0819c84dd589ed0a023b9d25dcfe7a3c123d5bf784ffbb77edf55335f0c
 
 include:
+  - local: 'ci-templates.yml'
   - local: 'backend/.gitlab-ci.yml'
   - local: 'frontend/.gitlab-ci.yml'
 
@@ -11,6 +12,11 @@ stages:
   - deploy
   - sync
 
+variables:
+  CI_REGISTRY_IMAGE: registry.gitlab.com/$CI_PROJECT_PATH
+  RAW_TAG: $CI_COMMIT_REF_NAME
+  TAG: "${RAW_TAG//\//_}"  # replace "/" with "_"
+
 sync_branches:
   stage: sync
   image: node:22@sha256:f6b9c31ace05502dd98ef777aaa20464362435dcc5e312b0e213121dcf7d8b95

backend/.gitlab-ci.yml

@@ -3,7 +3,6 @@ stages:
 
 variables:
   REGISTRY: registry.gitlab.com/$CI_PROJECT_PATH
-  TAG: $CI_COMMIT_REF_SLUG
 
 backend_build_job:
   stage: backend_build
@@ -21,32 +20,27 @@ backend_build_job:
 
 build_shared_base_image:
   stage: dockerize
-  before_script:
-    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
-  script:
-    - docker build -f backend/Dockerfile.base -t $REGISTRY/shared-base:$TAG .
-    - docker push $REGISTRY/shared-base:$TAG
-  needs:
-    - backend_build_job
+  extends: .docker_build_template
+  variables:
+    DOCKER_CONTEXT: backend
+    DOCKERFILE: Dockerfile.base
+    DOCKER_IMAGE: "$DOCKER_IMAGE/shared-base"
+    DOCKER_BUILD_ARGS: ""
 
 build_gateway_image:
   stage: dockerize
-  before_script:
-    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
-  script:
-    - docker build --build-arg JAR_FILE=backend/gateway/target/gateway-*.jar -f backend/Dockerfile.service -t $REGISTRY/gateway:$TAG .
-    - docker push $REGISTRY/gateway:$TAG
-  needs:
-    - backend_build_job
-    - build_shared_base_image
+  extends: .docker_build_template
+  variables:
+    DOCKER_CONTEXT: backend
+    DOCKERFILE: Dockerfile.service
+    DOCKER_IMAGE: "$DOCKER_IMAGE/gateway"
+    DOCKER_BUILD_ARGS: "--build-arg JAR_FILE=gateway/target/gateway-*.jar"
 
 build_discovery_image:
   stage: dockerize
-  before_script:
-    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
-  script:
-    - docker build --build-arg JAR_FILE=backend/discoveryServer/target/discoveryServer-*.jar -f backend/Dockerfile.service -t $REGISTRY/discovery-server:$TAG .
-    - docker push $REGISTRY/discovery-server:$TAG
-  needs:
-    - backend_build_job
-    - build_shared_base_image
+  extends: .docker_build_template
+  variables:
+    DOCKER_CONTEXT: backend
+    DOCKERFILE: Dockerfile.service
+    DOCKER_IMAGE: "$DOCKER_IMAGE/discovery-server"
+    DOCKER_BUILD_ARGS: "--build-arg JAR_FILE=discoveryServer/target/discoveryServer-*.jar"

ci-templates.yml

@@ -0,0 +1,16 @@
+.docker_build_template:
+  image: docker:20.10@sha256:2967f0819c84dd589ed0a023b9d25dcfe7a3c123d5bf784ffbb77edf55335f0c
+  before_script:
+    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
+  script:
+    - cd $DOCKER_CONTEXT
+    - |
+      echo "Building Docker image for $DOCKER_IMAGE with tag $TAG"
+      docker build $DOCKER_BUILD_ARGS -t $DOCKER_IMAGE:$TAG -f $DOCKERFILE .
+    - |
+      if [[ "$RAW_TAG" == "dev" || "$RAW_TAG" == "production" ]]; then
+        echo "Pushing Docker image $DOCKER_IMAGE:$TAG"
+        docker push $DOCKER_IMAGE:$TAG
+      else
+        echo "Skipping Docker push for non-dev or production branch: $RAW_TAG"
+      fi

frontend/.gitlab-ci.yml

@@ -12,22 +12,7 @@ variables:
   NEXT_PUBLIC_ENV: "production"
   OUTPUT_DIR: ".next"
   PROJECT_NAME: $CI_PROJECT_NAME
-  DOCKER_IMAGE: "registry.boomlab.party/rheinsw/$CI_PROJECT_NAME"
-
-# Reusable block for docker build & push
-.dockerize_script: &dockerize_script
-  - |
-    RAW_TAG="$CI_COMMIT_REF_NAME"
-    TAG="${RAW_TAG//\//_}"  # replace "/" with "_"
-    echo "Sanitized tag: $TAG"
-    docker build -t $DOCKER_IMAGE:$TAG -f Dockerfile .
-
-    if [[ "$RAW_TAG" == "dev" || "$RAW_TAG" == "production" ]]; then
-      echo "Pushing Docker image $DOCKER_IMAGE:$TAG"
-      docker push $DOCKER_IMAGE:$TAG
-    else
-      echo "Skipping Docker push for non-dev or production branch: $RAW_TAG"
-    fi
+  DOCKER_IMAGE: $CI_REGISTRY_IMAGE
 
 frontend_build_job:
   stage: frontend_build
@@ -40,11 +25,11 @@ frontend_build_job:
 
 dockerize_frontend:
   stage: dockerize
-  image: docker:20.10@sha256:2967f0819c84dd589ed0a023b9d25dcfe7a3c123d5bf784ffbb77edf55335f0c
-  before_script:
-    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
-  script:
-    - cd frontend
-    - *dockerize_script
+  extends: .docker_build_template
+  variables:
+    DOCKER_CONTEXT: frontend
+    DOCKERFILE: Dockerfile
+    DOCKER_IMAGE: $DOCKER_IMAGE
+    DOCKER_BUILD_ARGS: ""
   needs:
     - job: frontend_build_job