optimize pipeline

.gitlab-ci.yml

 image: maven:3.9.9-eclipse-temurin-21-alpine
 
-services:
-  - name: docker:dind
-    command: ["--tls=false"]
-
 stages:
   - check_version
   - set_version
@@ -49,6 +45,9 @@ check_version:
 
 set_version:
   stage: set_version
+  except:
+    - main
+    - release
   script:
     - FAILED_STAGE=$CI_JOB_STAGE
     - JAR_TAG=$(run_mvn.sh help:evaluate -Dexpression=project.version -q -DforceStdout | sed "s/SNAPSHOT/${CI_COMMIT_REF_NAME:0:20}-SNAPSHOT/")
@@ -56,6 +55,9 @@ set_version:
 
 build:
   stage: build
+  services:
+    - name: docker:dind
+      command: ["--tls=false"]
   script:
     - FAILED_STAGE=$CI_JOB_STAGE
     - run_mvn.sh clean install -Dmaven.wagon.http.retryHandler.count=3 -DelasticTests.disabled=true
@@ -107,9 +109,10 @@ revert_version:
 
 trigger_dev_rollout:
   stage: rollout
+  only:
+    - main
   script:
     - |
-      if [[ "$CI_COMMIT_REF_NAME" == "main" ]]; then
       FAILED_STAGE=$CI_JOB_STAGE
       git clone https://$CI_REGISTRY_USER:$CI_REGISTRY_PASSWORD@git.ozg-sh.de/ozgcloud-devops/gitops.git
       cd gitops
@@ -119,13 +122,13 @@ trigger_dev_rollout:
       git add dev/application/values/aggregation-manager-values.yaml
       git commit -m "jenkins rollout dev aggregation manager version $IMAGE_TAG"
       git push https://$CI_REGISTRY_USER:$CI_REGISTRY_PASSWORD@git.ozg-sh.de/ozgcloud-devops/gitops.git
-      fi
 
 trigger_test_rollout:
   stage: rollout
+  only:
+    - release
   script:
     - |
-      if [[ "$CI_COMMIT_REF_NAME" == "release" ]]; then
       FAILED_STAGE=$CI_JOB_STAGE
       git clone https://$CI_REGISTRY_USER:$CI_REGISTRY_PASSWORD@git.ozg-sh.de/ozgcloud-devops/gitops.git
       cd gitops
@@ -135,7 +138,6 @@ trigger_test_rollout:
       git add test/application/values/aggregation-manager-values.yaml
       git commit -m "jenkins rollout test aggregation manager version $IMAGE_TAG"
       git push https://$CI_REGISTRY_USER:$CI_REGISTRY_PASSWORD@git.ozg-sh.de/ozgcloud-devops/gitops.git
-      fi
 
 deploy_sbom_to_dependencytrack:
   stage: post_checks
@@ -145,12 +147,12 @@ deploy_sbom_to_dependencytrack:
 
 sonar_checks:
   stage: post_checks
+  only:
+    - main
   script:
     - |
-      if [[ "$CI_COMMIT_REF_NAME" == "main" ]]; then
       FAILED_STAGE=$CI_JOB_STAGE
       run_mvn.sh sonar:sonar -Dsonar.login=$SONARQUBE_TOKEN
-      fi
 
 # send_failure_message:
 #   stage: on_failure