nitro/vite strips `mappings` when generating sourcemaps

[kevinehosford]

Environment

node: v22.16.0
nitro@3.0.1-alpha.1

Reproduction

https://github.com/kevinehosford/nitro-tss-sourcemaps

Describe the bug

I notice that when enabling sourcemaps, the maps produced for the nitro build have an empty mappings:"" property. I was not expecting the mappings to be empty when producing sourcemaps.

If I add experimental: { sourcemapMinify: false } to the config then the property is not empty.

Additional context

No response

Logs

[pi0]

This is kinda expected current behavior. Previously this workaround worked well because dependency chunks were seperated but now they are not it is a problem.

We likely have to removal mappings removal bits till supporting full parse and tree-shake.