Move lint steps to lint script

Makefile

@@ -9,7 +9,6 @@ run:
 		provisioning.yml -i hosts
 
 lint:
-	@./scripts/run-tests.sh
 	@docker build -q -f .docker/lint-ansible.Dockerfile -t lint-ansible .
 	@docker run -v $$(pwd):/code lint-ansible
 	@docker build -q -f .docker/lint-sh.Dockerfile -t lint-sh .

scripts/lint-sh.sh

@@ -5,6 +5,20 @@ set -euo pipefail
 SH_SCRIPTS="$(find . -name '*.sh' -o -name '.bashrc' -o -name '.bash_profile')"
 EXIT_STATUS=0
 
+shopt -s globstar nullglob
+
+for file in **/*.yaml; do
+    echo "The file ${file} should have .yml as extension"
+    EXIT_STATUS=1
+done
+
+for file in **/*.yml; do
+    if ! grep '^\-\-\-$' "${file}" &> /dev/null; then
+        echo "The file ${file} does not has a '---' at the beggining."
+        EXIT_STATUS=1
+    fi
+done
+
 for script in ${SH_SCRIPTS}; do
     shellcheck "${script}" && continue
     EXIT_STATUS=1