We switched to `pnpm` for testing instead of `yarn` for e2e tests
containing customized node_modules packages, it works with
`node_modules` folder before. Rename the existing `node_modules_bak`
hack to make it easy to test with.
Previously we use `yarn` but it will clean `node_modules` folder so we
have to use another script to copy packages, it's not a required thing
now so we can test package from node_modules directly without renaming
folders locally
Closes NEXT-2496
This PR adds a resolver plugin to verify during bundling that when a module is unresolved, that it is not an optional peer dependency specified in the package.json of the caller. An error would happen if you try to bundle packages like `typeorm` since there are `require` calls in the code to those dependencies.
Also, swallow dynamic dependencies warnings in `require` calls error if they come from `node_modules`. They are not actionable at all generally.
This PR fixes (and simplifies) CSS loader rules, major things fixed with
this PR:
- (Tests added) Even if `appDir` isn't enabled, CSS/SASS/CSSM/SASSM
should still be transpiled for packages in node_modules, configured via
`transpilePackages`.
- They should be transpiled from other packages in the same monorepo
(not inside node_modules).
## Bug
- [ ] Related issues linked using `fixes #number`
- [x] Integration tests added
- [ ] Errors have a helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the
feature request has been accepted for implementation before opening a
PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have a helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `pnpm build && pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)
