Support flagging syntax errors as warnings

[sei-areuter]

Hi, I know that there is currently documentation that says that since helm isn't valid syntax it will be flagged in yamllint. I was wondering if instead of being able to suppress these errors we could level them out to warnings instead in our .yamllint. So an error like this

charts/templates/hpa.yaml
  1:3       error    syntax error: expected the node content, but found '-' (syntax)

Could be converted to into

charts/templates/hpa.yaml
  1:3       warning    syntax error: expected the node content, but found '-' (syntax)

With the following .yamllint.yaml

rules:
  syntax:
    level: warning

I've seen tickets about this before and there's issues with suppressing them before. But I haven't seen anyone request changing the error level before

[andrewimeson]

This isn't possible. Yamllint has to be able to parse the YAML and must know what each token is (is it part of a key name? a value? a multi-line value?). If it encounters invalid syntax it can't know what the intended syntax was to know how to parse the next thing (line? character?) after the syntax error.

If your templated YAML is not also valid YAML, we can't reliably lint it. You can try workarounds (e.g. docs: Putting template flow control in comments) to make your templated YAML be valid YAML, or you can lint the rendered output.