From 08d03b91a8680f30c23cff24f6f4be43d326636f Mon Sep 17 00:00:00 2001
From: Kevin Daudt <kdaudt@alpinelinux.org>
Date: Tue, 26 Nov 2024 19:39:30 +0000
Subject: [PATCH] ci: use dynamic downstream pipelines

This gives us more flexibiity with regards to the job configuration. One
job generates the job configuration which then triggers a downstream
pipeline.
---
 .gitlab-ci.yml          | 30 ++++++++++++++++++++++++++++--
 .gitlab/job-config.yaml |  0
 2 files changed, 28 insertions(+), 2 deletions(-)
 create mode 100644 .gitlab/job-config.yaml

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 00d9f8849ee..3f7d0fbbba9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,10 +7,10 @@ variables:
   GIT_DEPTH: "500"
   REGISTRY: registry.alpinelinux.org
 
-# only rune pipelines for merge requests or when tags are pushed  (for triggers)
 workflow:
   rules:
     - if: $CI_PIPELINE_SOURCE == "merge_request_event"
+    - if: $CI_PIPELINE_SOURCE == "pipeline" || $CI_PIPELINE_SOURCE == "parent_pipeline"
     - if: $CI_COMMIT_TAG
 
 lint:
@@ -26,6 +26,32 @@ lint:
     - docker-alpine
     - x86_64
 
+generate-build-jobs:
+  stage: verify
+  image:
+    name: $REGISTRY/alpine/infra/docker/alpine-gitlab-ci:latest
+  script:
+    - pipeline generate .gitlab-ci.yml .gitlab/job-config.yaml >.gitlab/build-jobs.yaml
+  artifacts:
+    paths:
+      - .gitlab/build-jobs.yaml
+  tags:
+    - docker-alpine
+    - x86_64
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
+
+build-jobs:
+  stage: verify
+  needs:
+    - generate-build-jobs
+  trigger:
+    include:
+      - artifact: .gitlab/build-jobs.yaml
+        job: generate-build-jobs
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
+
 .build:
   stage: verify
   image:
@@ -41,7 +67,7 @@ lint:
     expire_in: 1 day
     when: always
   rules:
-    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
+    - if: $CI_PIPELINE_SOURCE == "parent_pipeline"
 
 build-x86_64:
   extends: .build
diff --git a/.gitlab/job-config.yaml b/.gitlab/job-config.yaml
new file mode 100644
index 00000000000..e69de29bb2d