[New] support eslint 9 #2996
[New] support eslint 9 #2996
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #2996 +/- ##
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- Coverage 95.20% 95.07% -0.14%
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Files 82 82
Lines 3565 3571 +6
Branches 1245 1251 +6
==========================================
+ Hits 3394 3395 +1
- Misses 171 176 +5
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G-Rath
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I've just gotten back from travel, so I'll try to take a look at it in the coming days. One likely obstacle is that all the tests assume eslintrc, but eslint 9 requires an env var to support it, otherwise it defaults to flat config. The initial support needs to test eslintrc, and it would be fine to add flat config tests in a follow-on if needed. It's likely that the way eslint < 9's RuleTester works is subtly different than in eslint 9, so we may need an abstraction to handle that. |
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Yup part of this includes switching to a custom rule tester that converts the tests from eslintrc to flat config if they're running on v9, which is what we've been using in |
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That's great, but testing eslintrc on eslint 9 is also very important. It'd also be great if there was a commit or two I could land separately, that worked on eslint < 9, so that only the 9-specific parts remained in this PR after that was landed and rebased :-) |
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If you're meaning the context helper stuff, yeah I'm happy to pull them out I just figured you'd have asked them to be tested against ESLint v9 to prove they actually worked :-) |
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You figured right :-) but i can just cherry-pick the commits out of this PR once things are working. |
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Right well they're already good for cherry-picking - you want to pick from e31fe5c...543e378 (sans f0853cb once #2997 is landed), and away you go. I think you can have the eslintrc-on-v9 support by just running the whole test suite twice with the env enabled and an extra test in the custom rule tester - I'll push that up shortly |
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@ljharb |
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well that sucks, we’ll need to file an eslint issue about that gap. |
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I'll leave that to you as I suspect you'll have more pull :-) |
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Filed eslint/eslint#18292. |
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Totally, while it's still a draft I'm indeed just chipping away at the review :-) your effort is appreciated! |
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@michaelfaith and @G-Rath (and @soryy708), please do file an expense against https://opencollective.com/eslint-plugin-import for what you think is reasonable for all of your contributions in the last year. |
| datasource | package | from | to | | ---------- | -------------------- | ------ | ------ | | npm | eslint-plugin-import | 2.30.0 | 2.31.0 | ## [v2.31.0](https://github.com/import-js/eslint-plugin-import/blob/HEAD/CHANGELOG.md#2310---2024-10-03) ##### Added - support eslint v9 (\[[#2996](import-js/eslint-plugin-import#2996)], thanks \[[@G-Rath](https://github.com/G-Rath)] \[[@michaelfaith](https://github.com/michaelfaith)]) - \[`order`]: allow validating named imports (\[[#3043](import-js/eslint-plugin-import#3043)], thanks \[[@manuth](https://github.com/manuth)]) - \[`extensions`]: add the `checkTypeImports` option (\[[#2817](import-js/eslint-plugin-import#2817)], thanks \[[@phryneas](https://github.com/phryneas)]) ##### Fixed - `ExportMap` / flat config: include `languageOptions` in context (\[[#3052](import-js/eslint-plugin-import#3052)], thanks \[[@michaelfaith](https://github.com/michaelfaith)]) - \[`no-named-as-default`]: Allow using an identifier if the export is both a named and a default export (\[[#3032](import-js/eslint-plugin-import#3032)], thanks \[[@akwodkiewicz](https://github.com/akwodkiewicz)]) - \[`export`]: False positive for exported overloaded functions in TS (\[[#3065](import-js/eslint-plugin-import#3065)], thanks \[[@liuxingbaoyu](https://github.com/liuxingbaoyu)]) - `exportMap`: export map cache is tainted by unreliable parse results (\[[#3062](import-js/eslint-plugin-import#3062)], thanks \[[@michaelfaith](https://github.com/michaelfaith)]) - `exportMap`: improve cacheKey when using flat config (\[[#3072](import-js/eslint-plugin-import#3072)], thanks \[[@michaelfaith](https://github.com/michaelfaith)]) - adjust "is source type module" checks for flat config (\[[#2996](import-js/eslint-plugin-import#2996)], thanks \[[@G-Rath](https://github.com/G-Rath)]) ##### Changed - \[Docs] \[`no-relative-packages`]: fix typo (\[[#3066](import-js/eslint-plugin-import#3066)], thanks \[[@joshuaobrien](https://github.com/joshuaobrien)]) - \[Performance] \[`no-cycle`]: dont scc for each linted file (\[[#3068](import-js/eslint-plugin-import#3068)], thanks \[[@soryy708](https://github.com/soryy708)]) - \[Docs] \[`no-cycle`]: add `disableScc` to docs (\[[#3070](import-js/eslint-plugin-import#3070)], thanks \[[@soryy708](https://github.com/soryy708)]) - \[Tests] use re-exported `RuleTester` (\[[#3071](import-js/eslint-plugin-import#3071)], thanks \[[@G-Rath](https://github.com/G-Rath)]) - \[Docs] \[`no-restricted-paths`]: fix grammar (\[[#3073](import-js/eslint-plugin-import#3073)], thanks \[[@unbeauvoyage](https://github.com/unbeauvoyage)]) - \[Tests] \[`no-default-export`], \[`no-named-export`]: add test case (thanks \[[@G-Rath](https://github.com/G-Rath)])
| datasource | package | from | to | | ---------- | -------------------- | ------ | ------ | | npm | eslint-plugin-import | 2.30.0 | 2.31.0 | ## [v2.31.0](https://github.com/import-js/eslint-plugin-import/blob/HEAD/CHANGELOG.md#2310---2024-10-03) ##### Added - support eslint v9 (\[[#2996](import-js/eslint-plugin-import#2996)], thanks \[[@G-Rath](https://github.com/G-Rath)] \[[@michaelfaith](https://github.com/michaelfaith)]) - \[`order`]: allow validating named imports (\[[#3043](import-js/eslint-plugin-import#3043)], thanks \[[@manuth](https://github.com/manuth)]) - \[`extensions`]: add the `checkTypeImports` option (\[[#2817](import-js/eslint-plugin-import#2817)], thanks \[[@phryneas](https://github.com/phryneas)]) ##### Fixed - `ExportMap` / flat config: include `languageOptions` in context (\[[#3052](import-js/eslint-plugin-import#3052)], thanks \[[@michaelfaith](https://github.com/michaelfaith)]) - \[`no-named-as-default`]: Allow using an identifier if the export is both a named and a default export (\[[#3032](import-js/eslint-plugin-import#3032)], thanks \[[@akwodkiewicz](https://github.com/akwodkiewicz)]) - \[`export`]: False positive for exported overloaded functions in TS (\[[#3065](import-js/eslint-plugin-import#3065)], thanks \[[@liuxingbaoyu](https://github.com/liuxingbaoyu)]) - `exportMap`: export map cache is tainted by unreliable parse results (\[[#3062](import-js/eslint-plugin-import#3062)], thanks \[[@michaelfaith](https://github.com/michaelfaith)]) - `exportMap`: improve cacheKey when using flat config (\[[#3072](import-js/eslint-plugin-import#3072)], thanks \[[@michaelfaith](https://github.com/michaelfaith)]) - adjust "is source type module" checks for flat config (\[[#2996](import-js/eslint-plugin-import#2996)], thanks \[[@G-Rath](https://github.com/G-Rath)]) ##### Changed - \[Docs] \[`no-relative-packages`]: fix typo (\[[#3066](import-js/eslint-plugin-import#3066)], thanks \[[@joshuaobrien](https://github.com/joshuaobrien)]) - \[Performance] \[`no-cycle`]: dont scc for each linted file (\[[#3068](import-js/eslint-plugin-import#3068)], thanks \[[@soryy708](https://github.com/soryy708)]) - \[Docs] \[`no-cycle`]: add `disableScc` to docs (\[[#3070](import-js/eslint-plugin-import#3070)], thanks \[[@soryy708](https://github.com/soryy708)]) - \[Tests] use re-exported `RuleTester` (\[[#3071](import-js/eslint-plugin-import#3071)], thanks \[[@G-Rath](https://github.com/G-Rath)]) - \[Docs] \[`no-restricted-paths`]: fix grammar (\[[#3073](import-js/eslint-plugin-import#3073)], thanks \[[@unbeauvoyage](https://github.com/unbeauvoyage)]) - \[Tests] \[`no-default-export`], \[`no-named-export`]: add test case (thanks \[[@G-Rath](https://github.com/G-Rath)])
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I'm getting error:
Update: nevermind. Looks like in my case some another plugin re-use same plugin |
Do not define the plugin |
eslint-plugin-import was missing since the switch to [v9](#3558). They finally [support](import-js/eslint-plugin-import#2996) it so we can re-add it.
> [!WARNING] > **Breaking Change:** Now uses `eslint-plugin-react-hooks@5.0.0` which has a new violation disallowing Component names starting with anything but an uppercase letter. See https://github.com/facebook/react/releases/tag/eslint-plugin-react-hooks%405.0.0 for more details. Adds support of ESLint v9 to `eslint-plugin-next`, `eslint-config-next` and `next lint`. Does not require using the new flat config format. `next lint` will automatically ensure the old config format can be used. ### Why? As `eslint-plugin-react-hooks` has been updated for ESLint v9 support and is a helpful package for Next v15 upgrade, unblock the restrictions to upgrade to ESLint v9. Also, ESLint v8 is [End of Life](https://eslint.org/blog/2024/09/eslint-v8-eol-version-support/#:~:text=ESLint%20v8.-,x%20end%20of%20life%20is%20October%205%2C%202024,x%20on%20October%205%2C%202024.) support since Oct 5th, so is good to unblock v9 now. Plugins bumped: - [x] [@rushstack/eslint-patch](microsoft/rushstack#4719) ([v1.10.3](https://www.npmjs.com/package/@rushstack/eslint-patch/v/1.10.3?activeTab=versions) no release post, confirmed on NPM) - [x] [@typescript-eslint/eslint-plugin](typescript-eslint/typescript-eslint#9002) ([v8.0.0](typescript-eslint/typescript-eslint#9002 (comment))) - [x] [eslint-plugin-import](import-js/eslint-plugin-import#2996) ([v2.31.0](https://github.com/import-js/eslint-plugin-import/releases/tag/v2.31.0)) - [x] [eslint-plugin-jsx-a11y](jsx-eslint/eslint-plugin-jsx-a11y#1009) ([v6.10.0](https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/releases/tag/v6.10.0)) - [x] [eslint-plugin-react](jsx-eslint/eslint-plugin-react#3759) ([v7.35.0](https://github.com/jsx-eslint/eslint-plugin-react/releases/tag/v7.35.0)) - [x] [eslint-plugin-react-hooks](facebook/react#28773) ([v5.0.0](https://github.com/facebook/react/releases/tag/eslint-plugin-react-hooks%405.0.0)) We have to switch to ESLint v9 in our repo due to a pnpm bug where it automatically uses ESLint v9 even though we only installed it via `eslint-v9: npm:eslint@9.0.0`. This is a pnpm bug that wouldn't happen with Yarn v1, v4 nor NPM. Closes #64409 Closes #64114 Closes #64453 Closes NEXT-3293 --------- Co-authored-by: Sebastian "Sebbie" Silbermann <sebastian.silbermann@vercel.com>
Resolves #2948