Implement pipeline configuration and execution rules

# CI pipeline configuration

# CI pipeline configuration

# Switch from branch pipelines to merge request pipelines when a merge request is created

workflow:

  rules:

    # Ensures next rules do not block triggered pipelines

    - if: $CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS && $CI_PIPELINE_SOURCE == "push"

      when: never

    # always run for merge requests

    - if: $CI_PIPELINE_SOURCE == "merge_request_event"

    # never run a branch pipeline if there is an open merge request for that branch

    - if: $CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS

      when: never

    # the only allowed branch pipeline is that on the default branch

    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH

stages:

stages:

   - build

   - build

   - run

   - run

   allow_failure: true

   allow_failure: true

   needs:

   needs:

      - job: running_stage

      - job: running_stage

   artifacts:

      - paths:

         - build/cluster/pycompare.html

	 - build/sphere/pycompare.html

      exclude:

         - ".git*"

	 - ".git/**/*"

      expire_in: 2 hours

   script:

      # bash commands to be executed

      - pwd

      - hostname

      - echo $CI_COMMIT_SHA

      - echo $CI_COMMIT_BRANCH

      - cd build/sphere

      - echo "Comparing output of SPHERE"

      - python3 ../../src/scripts/pycompare.py --ffile=OSPH --cfile=c_OSPH --html

      - cd ../cluster

      - echo "Comparing output of CLUSTER"

      - python3 ../../src/scripts/pycompare.py --ffile=OCLU --cfile=c_OCLU --html