gpu_ci_trigger.yml

# SETUP INSTRUCTIONS:
# ------------------
# This workflow synchronizes the code to GitLab via SSH to trigger GPU-enabled CI.
# 
# 1. GENERATE SSH KEY PAIR (on your local machine):
#    ssh-keygen -t ed25519 -f ~/.ssh/gitlab_sync_key -N "" -C "github-to-gitlab-sync"
#
# 2. CONFIGURE GITLAB (The Target):
#    - Go to GitLab project > Settings > Repository > Deploy keys.
#    - Add the content of '~/.ssh/gitlab_sync_key.pub'.
#    - IMPORTANT: Check "Allow write access to this repository".
#
# 3. CONFIGURE GITHUB (The Source):
#    - Go to GitHub repo > Settings > Secrets and variables > Actions.
#    - Add new Repository Secrets:
#      - Name: GITLAB_SSH_PRIVATE_KEY
#        Value: Paste the entire content of '~/.ssh/gitlab_sync_key'.
#      - Name: GITLAB_TOKEN
#        Value: Your GitLab Personal Access Token (with 'api' and 'read_repository' scopes).
#

name: Sync to GitLab and Run GPU CI

on:
  push:
    branches: [main, devel]
  pull_request:
    branches: [main, devel]
  workflow_dispatch:

jobs:
  sync-and-test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install SSH Key
        uses: webfactory/ssh-agent@v0.9.0
        with:
          ssh-private-key: ${{ secrets.GITLAB_SSH_PRIVATE_KEY }}

      - name: Push to GitLab via SSH & Provide Link
        id: push
        run: |
          # 1. Setup SSH known hosts
          mkdir -p ~/.ssh
          ssh-keyscan gitlab.mpcdf.mpg.de >> ~/.ssh/known_hosts

          # 2. Determine target branch
          if [ "${{ github.event_name }}" == "pull_request" ]; then
            TARGET_BRANCH="gpu-test-pr-${{ github.event.number }}"
          else
            SOURCE_REF="${{ github.ref_name }}"
            SAFE_REF="${SOURCE_REF//\//-}"
            TARGET_BRANCH="gpu-test-${SAFE_REF}"
          fi
          echo "TARGET_BRANCH=$TARGET_BRANCH" >> $GITHUB_ENV

          # 3. Add GitLab SSH remote
          git remote add gitlab git@gitlab.mpcdf.mpg.de:maxlin/cunumpy.git

          # 4. Force push (This automatically starts the GitLab Pipeline)
          git push -f gitlab HEAD:refs/heads/$TARGET_BRANCH

          # 5. Provide the direct link
          PIPELINE_URL="https://gitlab.mpcdf.mpg.de/maxlin/cunumpy/-/pipelines?ref=$TARGET_BRANCH"

          echo "::notice::GitLab GPU CI Pipeline started automatically via Push!"
          echo "::notice::View Pipeline: $PIPELINE_URL"

      - name: Wait for GitLab Pipeline
        uses: docker://gitlab/glab:latest
        env:
          GITLAB_TOKEN: ${{ secrets.GITLAB_TOKEN }}
          GITLAB_HOST: gitlab.mpcdf.mpg.de
        with:
          entrypoint: glab
          args: ci status --live --branch ${{ env.TARGET_BRANCH }} --repo maxlin/cunumpy