Updated file .gitlab-ci.yml

# only cache local items.

    PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"

# ----------------------------------------------------

# This section caches the Python virtual environment.

# This section defines reusable configurations.

#

# This is a global cache configuration, and each job

# should inherit and extend.

# ----------------------------------------------------

.cache:

    key: $CI_COMMIT_REF_SLUG

    paths:

        - .cache/pip

        - anansi_python_env/

    policy: pull-push

# This section enables the Python virtual environment 

# and modifies PYTHONPATH.

.enable-python-virtual-environment:

    - source anansi_python_env/bin/activate

    - export PYTHONPATH="${NCP_TOP_LEVEL}/bin/lib:${PYTHONPATH}"

# ----------------------------------------------------

# This section defines stages of the pipeline:

# 'Prerequisites' stage jobs.

# ----------------------------------------------------

# This is a global cache job.

cache_job:

# This is a global cache job. We need to cache pip's package cache and the

# Python virtual environment.

global-cache-job:

    stage : prerequisites

    tags :

        - RuyLopez

        - source anansi_python_env/bin/activate

        - pip3 install -U sphinx

        - echo 'Python virtual environment successfully created.'

    needs: ["cache_job"]

    needs: ["global-cache-job"]

# ---------------------------------

# This deploys the documentation.

deploy-documentation : 

    extends: cache_job

    extends: global-cache-job

    cache:

        policy: pull

    stage : deploy

    tags :

        - RuyLopez

    before_script:

        - *enable-python-virtual-environment

    script :

        - echo "Deploying documentation ..."

        - source anansi_python_env/bin/activate

        - $NCP_TOP_LEVEL/bin/build_documentation.sh

        - echo "Documentation sucessfully deployed."