Echo commits vars

.gitlab-ci.yml

-# default installed image for docker executor is: python:3.6
 # using an image that can do git, docker, docker-compose
 image: gitlab-registry.mpcdf.mpg.de/nomad-lab/nomad-fair/ci-runner:latest
 
-# build directory inside
-# https://gitlab.mpcdf.mpg.de/help/ci/runners/configure_runners.md#custom-build-directories
-
-# https://docs.gitlab.com/ee/ci/yaml/workflow.html
-# https://docs.gitlab.com/ee/ci/variables/predefined_variables.html
-# if: CI_COMMIT_BRANCH && CI_COMMIT_BEFORE_SHA == "0000000000000000000000000000000000000000"
-# A branch pipeline, but it is the first commit for that branch
-# if: $CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS && $CI_PIPELINE_SOURCE == "push"
-# For an existing workflow section to switch from branch pipelines to merge request pipelines when a merge request is created.
-# if: $CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS
-# A branch pipeline, but a merge request is open for that branch, do not run the branch pipeline.
-# if: $CI_PIPELINE_SOURCE == "merge_request_event"
-# A merge request pipeline, start the pipeline.
-# if: $CI_COMMIT_BRANCH
-# A branch pipeline, but there is no merge request open for the branch, run the branch pipeline.
-
 .non-docs-changes: &non-docs-changes
   changes:
     - examples
@@ -58,7 +41,12 @@ stages:
 
 env:
   script:
-    - env
+    - echo "CI_PIPELINE_SOURCE = $CI_PIPELINE_SOURCE"
+    - echo "CI_COMMIT_BRANCH = $CI_COMMIT_BRANCH"
+    - echo "CI_COMMIT_TAG = $CI_COMMIT_TAG"
+    - echo "CI_COMMIT_REF_NAME = $CI_COMMIT_REF_NAME"
+    - echo "CI_COMMIT_REF_SLUG = $CI_COMMIT_REF_SLUG"
+
 
 update changelog:
   stage: build