Add error code extract and transform

[jaredpalmer]

Closes #78

• Rip out React's error workflow
• Add rollup and babel transforms that extract and swap errors
• Creates ./errors/codes.json in the root of tsdx directory on the first run, anything that uses a function call of invariant will be extracted.
• Outputs dev and prod error message functions at ./errors/ErrorDev.js and ./errors/ErrorProd.js. Once generated, user can freely edit them. To regenerate, just delete and run a build or watch.
• Add a flag to build called --extractErrors

[TrySound]

Looks cool!

[swyxio]

testing this out..

1. (minor) when i try this, extra files _error.production.ts and _error.ts are produced. this leaks the abstraction a little. worth storing this somewhere else? in a dotfolder? too much work?

2. (i have fixed this below) the error code file is not append only and depends on the order. this will cause a problem when moving invariants around and removing them. i assume this isnt what you want, error codes need to be immutable. i'll see what i can do to fix.

3. (i have fixed this below) if i currently run --extractErrors without any args, i get let url = 'true' + code;. we should handle this case.

[swyxio]

accidentally approved, should have requested changes. anyway im fixing this

[jaredpalmer]

We need to generate the files and roll it up so it either needs to be a separate runtime package or we need to inject it So it can be a relative import. The reason we need to generate it is so we can say “Minified Blank” error and have a custom url. Putting it in a dot folder could cause confusion. One possibility is for use to make an errors directory outside of src where this all lives.

[swyxio]

i dont feel strongly enough about it to do anything tbh :) anyway i think this is good to go. can work on more docs in a separate issue.

[jaredpalmer]

Slept on it. I think we should move everything to an errors directory

[swyxio]

i still want this i think. any blockers in your mind? i can resolve merge conflicts later

[jaredpalmer]

I just not sure it should be the default? Then again, it only does magical stuff if you use invariant() so idk. Maybe we just document the crap out of it

[swyxio]

i think it is already opt in tho? you made that change. needs people to actively run the errorExtraction flag.

and maybe add a bit more logging so people dont get surprised there is a new file.

[jaredpalmer]

Lol I totally forgot. I've been crazy busy working on Formik 2 + the thing that's not out yet. Yeah let's merge this lil guy

[jaredpalmer]

@sw-yx made some changes. I think this is g2g

[swyxio]

Formik World