I agree that YAML templating is kind of insane, but I will never understand why we don't stop using fake languages and simply use a real language.
If you need complex logic, use a programming language and generate the YAML/JSON/whatever with it. There you go. Fixed it for you.
Ruby, Python, or any other language really (I only favor scripting ones because they're generally easier to run), will give you all of that without some weird pseudo-language like Jsonnet or Go templates.
Write the freaking code already and you'll get bitten way less by obscure weird issues that these template engines have.
Seriously, use any real programing language and it'll be WAY better.
If you need complex logic, use a programming language and generate the YAML/JSON/whatever with it. There you go. Fixed it for you.
Ruby, Python, or any other language really (I only favor scripting ones because they're generally easier to run), will give you all of that without some weird pseudo-language like Jsonnet or Go templates.
Write the freaking code already and you'll get bitten way less by obscure weird issues that these template engines have.
Seriously, use any real programing language and it'll be WAY better.