I don't hate yaml. It's a bit overcomplicated, a bit too cute, but it works. It doesn't leave a lot of room for additional complexity, though. I've been using

I don't hate yaml. It's a bit overcomplicated, a bit too cute, but it works. It doesn't leave a lot of room for additional complexity, though. I've been using Ansible a lot recently. I like it a lot, most of the time. Its configuration files are YAML + Jinja2 templates + Python expressions. It works fine for the basics but when you push it quickly devolves into madness. e.g. I had a task like this: - set_fact: foo_bar: > {{ item | map(attribute="something") | rejectattr("bar", "none") | flatten | select is any }} Can you spot the error? The block scalar header `>` was missing the hyphen `>-`. YAML helpfully added a newline to the end of the template output. Python helpfully interpreted "False\n" as `true`. I'm starting to think I should write Python modules for anything complex.