CI: use a script for detecting changes from ansible log

.gitlab-ci.yml

@@ -30,7 +30,7 @@ check:
     - echo -n "${ANSIBLE_VAULT_PASSWORD}" > .ansible_vault_pw
     - export ANSIBLE_VAULT_PASSWORD_FILE=.ansible_vault_pw
     - with-ssh-key ansible-playbook -i hosts.ini --diff --check site.yml
-    - grep changed= ansible.log | grep -q -v changed=0 && false
+    - ./ci/has-changed ansible.log
   artifacts:
     paths:
       - ansible.log

ci/has-changed

+#!/bin/sh
+
+log="$1"
+
+if grep changed= $log | grep -v -q changed=0; then
+    echo "changes were detected" >&2
+    exit 1
+fi
+
+exit 0