determine preprocessLang dynamically

[tjk]

I have a patch that tries to add tests but getting vite consolidate require resolution errors when installing pug in the playground directory, for example. Also getting typescript compilation errors -- are you getting those too or am I set up incorrectly?

I also was thinking about vueTemplateOptions allowing a function but it is called in a place without the SFCBlock so it was not very clean (because right now I might want to set options for pug, but not html, for example).

Let me know if I'm going about this completely the wrong way too, please!

[underfin]

I have a patch that tries to add tests but getting vite consolidate require resolution errors when installing pug in the playground directory, for example. Also getting typescript compilation errors -- are you getting those too or am I set up incorrectly?

It caused by the path of vite-plugin-vue2 is root directory, the pug will work if it installed at root directory.