add messaging and exit earlier

cdist/conf/type/__sed/gencode-remote

@@ -27,11 +27,14 @@ then
     sed_cmd="$sed_cmd --regexp-extended"
 fi
 
-if ! echo "$script" \
+if echo "$script" \
     | "$sed_cmd" -f - "$file_from_target" \
     | diff "$file_from_target" - \
     > /dev/null
 then
+    exit 0
+fi
+
 # shellcheck disable=SC2016
 echo 'tmp="$( mktemp )"'
 
@@ -46,8 +49,9 @@ then
 # shellcheck disable=SC2016
 echo 'rm -f "$tmp"'
 
+echo 'change' >> "$__messages_out"
+
 if [ -f "$__object/parameter/onchange" ]
 then
     cat "$__object/parameter/onchange"
 fi
-fi