Like using a debugger to see what is happening inside of the SWC binary code?

yep

Is there any good debugging method?

for like a window with a next.js project nothing really comes to mind.

In general the rust language features should have a debugger, you might need to get the source code and everything though

why do you want to do this?

you can force it to use babel if you put a .babelrc file, which might be the move if SWC is doing something wrong

I want to know the “server action compile section”，I'm very interested in this part，I try to using the lldb do this， but I ran into some lldb debugger configuration issues，So I I want to know what else to do

I would probably look more at the SWC side of things than the Next.js side. There must be docs about building/debugging it at the official project: https://github.com/swc-project/swc

ok thanks !

Also, SWC can run on its own without next.js being involved at all. You can just run it like swc someFile.ts

something like gdb swc someFile.ts

Yep

oof, it seems to always run in napi though, so that gdb command wouldn't work

this article is kind of like what you are doing:
https://medium.com/@a7ul/debugging-nodejs-c-addons-using-vs-code-27e9940fc3ad

Also, just downloading the source, finding the afflicted rust code of interest and putting in a bunch of console logging might actually end up being waaaaayyyyy better

thanks!

wouldn't a lot of the stuff about server actions actually be right inside of the Next.js source code, not SWC?

It not work for me LOL,It's been tried

yeah doing it with the binary stuff shipped with next or the npm package is probably not going to work

because it won't have debug symbols or anything.

but are you like really sure what you want to know is in SWC?

Why would server actions be compiled any different than any other TS

But the next-swc-loader have some logical processing

and if they are different, wouldn't reversing Babel be way easier?

like Babel is still supported

Maybe, I'll look into it.

good luck, I hope you find exciting secrets!