Have you applied rules in GitLab CI/CD to manage task execution?

Yes, in GitLab CI/CD I used rules (rules) to control the execution of jobs. Rules allow flexible definition of when and under what conditions a specific job should run.

For example, you can run a job only when there are changes in certain directories, or only for specific branches, or when certain environment variables are present.

An example of using rules in .gitlab-ci.yml:

build_job:
  script: ./build.sh
  rules:
    - if: '$CI_COMMIT_BRANCH == "main"'
      when: always
    - changes:
      - src/**
      when: manual
    - when: never

Here, the build_job runs automatically on the main branch, can be triggered manually when there are changes in the src folder, and does not run in other cases.

Using rules helps optimize the CI/CD process, avoiding unnecessary runs and speeding up the build.