Resolve "Prevent duplicated pipelines on merge request and commit"

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

Closes #125 (closed)

.gitlab-ci.yml

@@ -2,6 +2,14 @@ variables:
   SECURE_ANALYZERS_PREFIX: registry.gitlab.com/gitlab-org/security-products/analyzers
   DOCKER_IMAGE_SHA: ${CI_REGISTRY_IMAGE}:${CI_COMMIT_SHA}
 
+workflow:
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
+    - if: '$CI_PIPELINE_SOURCE == "schedule"'
+    - if: '$CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS && $CI_PIPELINE_SOURCE == "push"'
+      when: never
+    - if: '$CI_COMMIT_BRANCH'
+
 stages:
   - .pre
   - test