stages:
  - check-status
  - trigger dumux pipelines
  - trigger downstream modules

variables:
  IMAGE_REGISTRY_URL: $CI_REGISTRY/dumux-repositories/dumux-docker-ci
  DUMUX_CI_TRIGGER_LECTURE_BRANCH: master
  DUMUX_CI_DUNE_LATEST_RELEASE: "2.8"

# Cases in which to create pipelines at all. The trigger jobs may further
# specify how exactly they should be created in different situations.
workflow:
  rules:
    - if: $CI_PIPELINE_SOURCE == "schedule"
    - if: $CI_PIPELINE_SOURCE == "pipeline"
    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
    - if: '$CI_COMMIT_BRANCH =~ /^(master|releases\/)/'

# for commits happening on master, we check if there was a successful
# pipeline on a related merge request already. If yes, we simply return
# to propagate that pipeline status on master. Otherwise, we trigger a new run.
check-pipeline-status:
  image: $IMAGE_REGISTRY_URL/full:dune-$DUMUX_CI_DUNE_LATEST_RELEASE-gcc-ubuntu-20.04
  stage: check-status
  rules:
    - if: $CI_PIPELINE_SOURCE == "schedule"
      when: never
    - if: $CI_PIPELINE_SOURCE == "pipeline"
      when: never
    - if: '$CI_COMMIT_BRANCH =~ /^(master|releases\/)/'
      when: always
  script:
    - |
      getLastSuccessful() {
          python3 .gitlab-ci/getpipelineinfo.py \
                      --access-token $CI_JOB_API_READ_TOKEN \
                      --look-for latest-merge \
                      --print-format commit-sha
      }

      if ! python3 .gitlab-ci/getpipelineinfo.py --access-token $CI_JOB_API_READ_TOKEN \
                                                 --look-for HEAD \
                                                 --print-format pipeline-id; then
          echo "No successful pipeline found."

          REFERENCE_SHA=""
          if getLastSuccessful; then
              REFERENCE_SHA=$(getLastSuccessful);
              echo "Triggering new pipeline against reference commit $REFERENCE_SHA."
          else
              echo "Latest successful pipeline not found. Trigger complete pipeline."
          fi

          curl --request POST --form "token=$CI_JOB_TOKEN" \
                              --form ref=$CI_COMMIT_BRANCH \
                              --form "variables[CI_REFERENCE_SHA]=$REFERENCE_SHA" \
                              "https://git.iws.uni-stuttgart.de/api/v4/projects/31/trigger/pipeline"
      else
          echo "Found successful pipeline for the current state of the branch. Not testing again."
      fi

###################################################################################
# Stage 1: trigger the Dumux test pipelines                                       #
# In this stage, we trigger the test pipeline with different configurations, i.e. #
# different Dune versions, compilers, etc. Within merge requests, we create three #
# test pipelines including two different compilers and a full and minimal setup   #
# of dependencies. In all other situations, additional test jobs are created.     #
###################################################################################

# basic trigger job to start the test pipeline
.base-trigger:
  stage: trigger dumux pipelines
  trigger:
    include: .gitlab-ci/default.yml
    strategy: depend
  variables:
    MR_TARGET_BRANCH_NAME: $CI_MERGE_REQUEST_TARGET_BRANCH_NAME
    REFERENCE_SHA: $CI_REFERENCE_SHA
  rules:
  - if: $CI_PIPELINE_SOURCE == "schedule"
    when: always
  - if: $CI_PIPELINE_SOURCE == "pipeline"
    when: always
  - if: $CI_PIPELINE_SOURCE == "merge_request_event"
    when: manual

# trigger for jobs that should not be created in merge requests
.non-mr-trigger:
  extends: .base-trigger
  rules:
    - if: $CI_PIPELINE_SOURCE == "schedule"

#############################################
# pipelines to be created in merge requests #
full-dune-latest-release-gcc:
  extends: .base-trigger
  variables:
    IMAGE: $IMAGE_REGISTRY_URL/full:dune-$DUMUX_CI_DUNE_LATEST_RELEASE-gcc-ubuntu-20.04

minimal-dune-latest-release-gcc:
  extends: .base-trigger
  variables:
    IMAGE: $IMAGE_REGISTRY_URL/minimal:dune-$DUMUX_CI_DUNE_LATEST_RELEASE-gcc-ubuntu-20.04

full-dune-latest-release-clang:
  extends: .base-trigger
  variables:
    IMAGE: $IMAGE_REGISTRY_URL/full:dune-$DUMUX_CI_DUNE_LATEST_RELEASE-clang-ubuntu-20.04

full-dune-master-gcc:
  extends: .base-trigger
  variables:
    IMAGE: $IMAGE_REGISTRY_URL/full:dune-master-gcc-ubuntu-20.04


##################################
# additional scheduled pipelines #
full-dune-master-clang:
  extends: .non-mr-trigger
  variables:
    IMAGE: $IMAGE_REGISTRY_URL/full:dune-master-clang-ubuntu-20.04


#########################################################
# Stage 2: trigger test pipelines of downstream modules #
#########################################################

# trigger lecture test
trigger lecture:
  rules:
  - if: $CI_PIPELINE_SOURCE == "schedule"
  - if: $CI_PIPELINE_SOURCE == "pipeline"
  - if: $CI_PIPELINE_SOURCE == "merge_request_event"
  stage: trigger downstream modules
  trigger:
    project: dumux-repositories/dumux-lecture
    branch: $DUMUX_CI_TRIGGER_LECTURE_BRANCH
    strategy: depend
  variables:
    DUMUX_MERGE_REQUEST_SOURCE_BRANCH: $CI_MERGE_REQUEST_SOURCE_BRANCH_NAME
    DUMUX_MERGE_REQUEST_TARGET_BRANCH: $CI_MERGE_REQUEST_TARGET_BRANCH_NAME
    DUMUX_COMMIT_SHA: $CI_COMMIT_SHA
    DUMUX_REFERENCE_SHA: $CI_REFERENCE_SHA