CI: Fix ansible-lint search space

This patch will allow ansible-lint to search for files on its own instead of *.yml files in the root directory. Since playbooks now reside in their own folder, ansible-lint would not lint any roles anymore.

Also this introduces another small stub ansible-lint related ansible config file, so it does not always try to use the vault password / decrypt files.

.gitlab-ci.yml

@@ -13,7 +13,7 @@ ansible-lint:
   stage: lint
   script:
     - ansible-lint --version
-    - ansible-lint -f codeclimate *.yml > ansible-lint-report.json
+    - ANSIBLE_CONFIG=ansible.lint.cfg ansible-lint -f codeclimate > ansible-lint-report.json
   artifacts:
     reports:
       codequality: ansible-lint-report.json

Makefile

@@ -6,7 +6,7 @@ help: ## Show this help
 	@egrep -h '\s##\s' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'
 
 lint: ## Lint ansible files with ansible-lint
-	ansible-lint
+	ANSIBLE_CONFIG=ansible.lint.cfg ansible-lint
 
 install: ## Install or update requirements
 	ansible-galaxy install -f -r requirements.yml

ansible.lint.cfg

@@ -0,0 +1,2 @@
+# Empty stub config file, so ansible-lint does not use the default config's vault_password_file.
+# Otherwise ansible-lint always tries to get a vault password and fails.