support XML as input

[volck]

Even though most of the world is JSON, XML is still actively used and should be supported as a format, either by having its native function xml.unmarshal accessible or by some sort of conversion method

What is the underlying problem you're trying to solve?

Parsing XML with Rego rulesets.

Describe the ideal solution

The ideal solution would probably be language support on par with JSON,

Describe a "Good Enough" solution

I guess we make a parser that converts xml to json to ease into it?

Additional Context

[anderseknert]

Hi there, and thanks for opening an issue! Some thoughts here:

• OPA core is unlikely to ever support XML as an input/output format.
• Built-in functions for marshaling/unmarshaling hasn't been requested before though, or not that I can remember, but that would definitely be a less disruptive inclusion.
• Could you please elaborate a little on why this is important for your use case? There are many formats still in use and not supported by OPA, and that itself isn't a reason to consider them.

[anderseknert]

Also, while it doesn't cater to every use case, there's also Conftest, which adds a number of supported formats, including XML.

[volck]

Yes, sure, I can elaborate a bit. I would like to use opa as a control system that validates xml/json files against a given ruleset. I guess I could write a preparser that encodes the input into json and use opa from there...

[stale]

This issue has been automatically marked as inactive because it has not had any activity in the last 30 days. Although currently inactive, the issue could still be considered and actively worked on in the future. More details about the use-case this issue attempts to address, the value provided by completing it or possible solutions to resolve it would help to prioritize the issue.