In The Same File

We can extend GitLab rules section with !reference [.hiddenjobname, section name]. Here’s an example:

## Make sure that this specific pipeline is written 
.publish-line-rules:
  rules:
    - if: '$CI_COMMIT_TAG == null && $CI_COMMIT_REF_PROTECTED == "true"'

Publisher (Tag):
  stage: deploy
  image: registry.gitlab.com/chez14/publisher:v1.0.2
  rules:
    - !reference [.publish-line-rules, rules] ## HERE IT IS!
  needs:
    - "Test"
  script:
    - setup-git.sh
    - gitlab-unshallow.sh
    - taggedVersion="v$(autotag)"
    - echo VERSION=$taggedVersion >> taginfo.env
    - git push --tags
  artifacts:
    reports:
      # To ensure we've access to this file in the next stage
      dotenv: taginfo.env

Reasons:

• Because of the spec, “There’s no way of merging sequences on YAML level.“.
  https://stackoverflow.com/a/4949139/4721245

Resources:

• Forum Discussion:
  https://forum.gitlab.com/t/extend-job-rules-with-multiple-reference-containing-array-of-rules/70190/2?u=chez14
• Suggested by SO peeps:
  https://stackoverflow.com/a/69768241/4721245
• Official Documentation:
  https://docs.gitlab.com/ee/ci/yaml/yaml_optimization.html#reference-tags

In Template File (via include: keyword)

Have not yet tried x.x

TODO: Try to do this.