Tutorial: Advanced use case for GitLab Pipeline Execution Policies

This post introduces a practical implementation of GitLab Pipeline Execution Policies for enforcing CI/CD job adherence. It details a bash script that uses the GitLab Projects API to retrieve pipeline jobs and compare them against approved stages and jobs defined in injected YAML. The script includes logic for authentication using group access tokens and error handling for API calls. The YAML injection mechanism is demonstrated with variables for API URLs, project/pipeline IDs, and approved stages/jobs, highlighting the use of the reserved `.pipeline-policy-pre` stage. The post also touches on storing policies in a dedicated Security Policy Project for restricted access.