ci for publishing pre-generated outputs

.gitlab-ci.yml

+variables:
+  GIT_DEPTH: 50
+  QUARTO_VERSION: 1.4.553
+
+workflow:
+  # these rules ensure that whenever there's a merge request, a "merge request pipeline" is run,
+  # but otherwise a classical branch-pipeline is run. This enables the use of merge-request specific
+  # environment variables within CI.
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
+    - if: '$CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS'
+      when: never
+    - if: '$CI_COMMIT_BRANCH'
+
+stages:
+  - test
+  - build
+
+run_pre_commit_hooks:
+  tags:
+    - conda
+  stage: test
+  variables:
+    PRE_COMMIT_HOME: ${CI_PROJECT_DIR}/.cache/pre-commit
+  cache:
+    paths:
+      - ${PRE_COMMIT_HOME}
+  script:
+    - python3 -V  # Print out python version for debugging
+    - python3 -m pip install pre-commit
+    - echo running pre-commit for revision range $COMPARE_SOURCE ... HEAD
+    - pre-commit run --from-ref $COMPARE_SOURCE --to-ref HEAD
+  rules:
+    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
+      variables:
+        COMPARE_SOURCE: $CI_MERGE_REQUEST_DIFF_BASE_SHA
+    - if: '$CI_COMMIT_BRANCH'
+      variables:
+        COMPARE_SOURCE: HEAD^1
+
+.build: &build
+  stage: build
+  tags:
+    - conda
+  script:
+    - ls catalog/
+  artifacts:
+    paths:
+      - catalog
+    expire_in: 20min
+
+
+preview:
+  extends: .build
+  variables:
+    DEPLOY_URL: https://$CI_PROJECT_NAMESPACE.$CI_PAGES_DOMAIN/-/$CI_PROJECT_NAME/-/jobs/$CI_JOB_ID/artifacts/public
+  environment:
+    name: review/$CI_COMMIT_REF_NAME
+    url: $DEPLOY_URL/index.html
+  rules:
+    - if: $CI_COMMIT_BRANCH != $CI_DEFAULT_BRANCH
+
+pages:
+  extends: .build
+  variables:
+    DEPLOY_URL: https://$CI_PROJECT_NAMESPACE.$CI_PAGES_DOMAIN/$CI_PROJECT_NAME
+  environment:
+    name: production
+    url: $DEPLOY_URL
+  rules:
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH