.gitlab-ci with dynamic pipelines

.gitlab-ci-dynamic.yaml

image: $CI_REGISTRY_IMAGE/$CI_IMAGE_NAME:latest
services:
  - docker:dind

stages:
  - generate-ci
  - triggers

generate-ci:
  stage: generate-ci
  script:
    - python3 scripts/generate_ci.py
  artifacts:
    paths:
      - ci-out
  rules:
    - if: $CI_PIPELINE_SOURCE == "schedule"
      when: never
    - when: always

parents:
  stage: triggers
  trigger:
    include:
      - artifact: ci-out/middle-ci.yml
        job: generate-ci
    strategy: depend
  variables:
    PARENT_PIPELINE_ID: $CI_PIPELINE_ID
    PARENT_JOB_NAME: generate-ci
  rules:
    - if: $CI_PIPELINE_SOURCE == "schedule"
      when: never
    - when: always