Testing Gitlab CI rules

.gitlab-ci.yml

stages:
  - debug
  - test
  - build
  - deploy

variables:
  SOME_VARIABLE: present

debug:
  stage: debug
  rules:
    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
    - if: $CI_PIPELINE_SOURCE == 'push'
    - when: always
  script:
    - export 1>&2

.tests:
  stage: test
  rules:
    - if: $CI_MERGE_REQUEST_IID
    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'

.build:
  stage: build
  rules:
    - if: # ensure build is ran on merge request to master
       $CI_PIPELINE_SOURCE == 'merge_request_event'
        && $CI_MERGE_REQUEST_TARGET_BRANCH_NAME == 'master'
      when: always
    - if:  # ensure build is ran on merge_request to devel
        $CI_PIPELINE_SOURCE == 'merge_request_event'
        && $CI_MERGE_REQUEST_TARGET_BRANCH_NAME == 'devel'
      when: always
    - if: # ensure build is ran on merge target to devel
       $CI_PIPELINE_SOURCE == 'push'
        && $CI_COMMIT_REF_NAME == 'devel'
      when: always
    - if: # ensure build is ran on merge target to master
       $CI_PIPELINE_SOURCE == 'push'
        && $CI_COMMIT_REF_NAME == 'master'
      when: always

    - if: # enable manual build run
        $CI_PIPELINE_SOURCE == 'merge_request_event'
      when: manual
    - when: never

.deploy:
  stage: deploy

Test Lorem:
  stage: test
  extends: .tests
  artifacts:
    expire_in: 1week
    paths:
      - artifacts
  script:
    - echo OK
    - export 1>&2

Build Lorem:
  stage: build
  extends: .build
  artifacts:
    expire_in: 1week
    paths:
      - artifacts
  script:
    - mkdir -p artifacts
    - echo Lorem ipsum dolor sit amet > artifacts/lorem-ipsum.txt
    - export > artifacts/exports.txt

Deploy Lorem (Staging):
  stage: deploy
  needs:
    - Build Lorem
  rules:
    - if: $CI_COMMIT_BRANCH == 'devel'
  environment:
    name: staging
  script:
    - ls -l artifacts 1>&2


Deploy Lorem (Production):
  stage: deploy
  needs:
    - Build Lorem
  rules:
    - if: $CI_COMMIT_BRANCH == 'master'
      when: manual
  environment:
    name: production
  script:
    - ls -l artifacts 1>&2