Add pre-commit hook to check playbook syntax

hooks/pre-commit.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+# This is the pre-commit hook that runs each time with `git commit`
+# and checks syntax of the playbooks
+# To install run
+#   ln -s ../../hooks/pre-commit.sh .git/hooks/pre-commit
+
+echo "Running pre-commit hook"
+
+STASH_NAME="pre-commit-$(date +%s)"
+git stash save -q --keep-index $STASH_NAME
+
+echo "Checking the playbook syntax"
+ansible-playbook -i hosts site.yml --syntax-check
+RESULT=$?
+
+if [[ $RESULT == 0 ]]; then
+	echo "Running Ansible linter"
+	ansible-lint *.yml
+	RESULT=$?
+fi
+
+STASHES=$(git stash list)
+
+if [[ $STASHES =~ .*$STASH_NAME ]]; then
+  git stash pop -q
+fi
+
+[ $RESULT -ne 0 ] && exit 1
+exit 0