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fix: hardcode declaration extension check #456

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merged 4 commits into from
Jul 10, 2023

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@agilgur5 agilgur5 commented Jul 7, 2023

Summary

Follow-up to #451 (comment), ensure declarations are always ignored during resolution.

  • Technically, this fixes a tiny new regression whereby a user could have accidentally (or incorrectly) made rpt2 try to process a directly imported declaration

Details

  • rpt2 should always ignore declarations

    • regardless of the exclude; as in, if a user accidentally removes declarations in an override, rpt2 should still not directly read declarations
      • as they are normally read ambiently by TS and not directly by Rollup or TS
  • this also ensures that the resolveId check is the same as the type-only resolve pre-check

    • adds a comment referencing why this is done. see my commit message step-by-step details on that one, it's a bit complicated logic

Cherry-pick of two commits from October that I had on a different, incomplete branch for #426

- basically, right now, the addition of `this.load` on all `references` is causing Rollup to error out on JSON files
  - specifically, this is impacting `configPlugin` usage (i.e. `rollup.config.ts`), where previously one didn't need `@rollup/plugin-json`, but now it is erroring out without it
  - I tracked this down to be because of `this.load` specifically
  - to avoid this and similar such issues, we can preemptively `filter` out files before calling `this.resolve` / `this.load`, which should end up `exclude`ing JSON files and any other non-rpt2 files
    - this should also make it a bit more efficient to skip some recursion
    - and non-rpt2 files shouldn't include any type-only files

- confirmed that this change fixes the error
  - and that the type-only tests still pass
- since the same logic is used in `resolveId` and these _should_ be equivalent

- in the future, we might want to add more common logic to this function, e.g. `getAllReferences` removes `undefined` and uses `moduleNameResolver` as well, similar to `resolveId`
  - may not be so easy, so TBD
    - for instance, even moving the `undefined` check into the func required adding a type guard, as the compiler wasn't quite able to infer that passing the func meant it was not `undefined`
- support newer TS extensions

- rpt2 should _always_ ignore declarations
  - regardless of the `exclude`; as in, if a user accidentally removes declarations in an override, rpt2 should still not directly read declarations
    - as they are normally read ambiently by TS and not _directly_ by Rollup or TS
…rences

- we don't `return false` in `resolveId`, so any new file that wasn't previously in Rollup's pipeline _must_ be resolved
  - `return` just defers to the next plugin, so, for a declaration, it eventually causes Rollup to try and fail to resolve on its own, giving an `Unexptected token` error message
  - but we _don't_ want to `return false` in `resolveId` if they _intentionally_ imported a declaration for some reason (e.g. if they're going to transform it in some way)
    - if we did `return false`, no other plugin could process either
  - so as a result, we should just never call `this.resolve()` on anything we don't expect to be able to resolve
    - i.e. don't add anything new to the pipeline that we don't resolve ourselves
@agilgur5 agilgur5 added the kind: regression Specific type of bug -- past behavior that worked is now broken label Jul 7, 2023
@agilgur5 agilgur5 requested a review from ezolenko July 7, 2023 20:21
@agilgur5 agilgur5 mentioned this pull request Jul 7, 2023
@agilgur5 agilgur5 added the version: patch Increment the patch version when merged label Jul 7, 2023
@ezolenko ezolenko merged commit 976dadb into ezolenko:master Jul 10, 2023
@agilgur5 agilgur5 deleted the fix-hardcode-extension-check branch July 10, 2023 15:51
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