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Add eslint rules to guard against unexpected imports/exports #28513

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merged 6 commits into from Feb 1, 2021

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Description

Fix #28510.

Add eslint-plugin-import and enable the import/default and import/named rules.

A typo is introduced in #28176, after briefly discussed on Slack, I think it's best to update the linter to guard against these kinds of bugs.

This PR also fixes the errors found by the linter.

How has this been tested?

Only apply the first commit of this PR and run the linter:

npm run lint-js

Observe that there're errors reported.

After applying all the changes, run the linter again, observe that there're no more errors.

Types of changes

Bug fix

Checklist:

  • My code is tested.
  • My code follows the WordPress code style.
  • My code follows the accessibility standards.
  • My code has proper inline documentation.
  • I've included developer documentation if appropriate.
  • I've updated all React Native files affected by any refactorings/renamings in this PR.

@kevin940726 kevin940726 added [Type] Bug An existing feature does not function as intended [Package] ESLint plugin /packages/eslint-plugin labels Jan 27, 2021
@kevin940726 kevin940726 force-pushed the update/add-eslint-plugin-import branch from b3d4f27 to 0536de7 Compare January 27, 2021 09:20
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@kevin940726 kevin940726 marked this pull request as draft January 27, 2021 09:36
@gziolo
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gziolo commented Jan 28, 2021

Great idea to add those rules. I see there are several violations to fix first, though.

If you want to add it to the ESLint plugin with WordPress configs, I would recommend starting with the warning level to not fail their CI checks after a minor update of dependencies. This is a common strategy that other ESLint plugins use to roll out more strict checks gradually. Even looking at Gutenberg changes necessary to satisfy linter - it's a breaking change. The approach we used in the past was marking new rules at warning level in the package and promote to an error in the Gutenberg repo.

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@gziolo That's an excellent idea! Will try!

@kevin940726 kevin940726 force-pushed the update/add-eslint-plugin-import branch from 0946c12 to 1ec8e2d Compare January 29, 2021 02:09
@kevin940726 kevin940726 marked this pull request as ready for review January 29, 2021 02:58
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@gziolo gziolo left a comment

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Everything looks great as it goes for the ESLint changes.

There is some usual dance left with rebases and the package lock file.

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Nice work, thank you for wrangling it 💯

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