Upgrade eslint to v9.x
#2281
Open
Upgrade eslint to v9.x
#2281
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
- eslint: ^8.57.0 → ^9.28.0 - eslint-plugin-github: ^4.10.2 → ^6.0.0 - eslint-config-prettier: ^9.0.0 → ^10.1.5 - eslint-plugin-jest: ^27.9.0 → ^29.0.1 - Remove @typescript-eslint/* (bundled with eslint-plugin-github@6)
- Replace .eslintrc.json with eslint.config.mjs - Remove .eslintignore (ignores now in config) - Remove deprecated rules (semi, type-annotation-spacing, no-empty-interface)
- Remove unused eslint-disable directives for @typescript-eslint/no-var-requires
Contributor
There was a problem hiding this comment.
Pull request overview
Migrates the repo’s linting setup to ESLint v9 by switching from legacy .eslintrc/.eslintignore to a flat config, and updates related ESLint plugin dependencies.
Changes:
- Upgraded ESLint and key lint plugins/configs (github, jest, prettier) to versions compatible with ESLint v9.
- Replaced
.eslintrc.json/.eslintignorewith a neweslint.config.mjsflat configuration. - Updated a couple of tests’ inline eslint-disable directives to match the new rule set.
Reviewed changes
Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| packages/tool-cache/tests/manifest.test.ts | Updates inline eslint-disable directive for require usage. |
| packages/http-client/tests/proxy.test.ts | Updates inline eslint-disable directive for require usage. |
| package.json | Bumps ESLint + related lint tooling dependencies to v9-compatible versions. |
| package-lock.json | Locks updated dependency graph from the ESLint v9/tooling upgrades. |
| eslint.config.mjs | Introduces ESLint v9 flat config with repo-specific ignores and rule overrides. |
| .eslintrc.json | Removed legacy ESLint configuration (superseded by flat config). |
| .eslintignore | Removed legacy ignore file (replaced by ignores in flat config). |
Comments suppressed due to low confidence (1)
eslint.config.mjs:52
@typescript-eslint/array-typeis set tooff, which loosens linting compared to the prior configuration and can allow mixedT[]vsArray<T>styles over time. If there isn't a specific migration-related need to disable it, consider re-enabling it to avoid churn/inconsistency.
// Disable stricter rules from eslint-plugin-github v6
'@typescript-eslint/no-shadow': 'off',
'@typescript-eslint/array-type': 'off',
'@typescript-eslint/no-wrapper-object-types': 'off',
💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.
| '@typescript-eslint/no-unsafe-function-type': 'off', | ||
|
|
||
| // TypeScript rules | ||
| '@typescript-eslint/no-unused-vars': 'off', |
There was a problem hiding this comment.
@typescript-eslint/no-unused-vars is set to off, which is a behavior change from the previous ESLint config (it was enforced as an error). If the goal of this PR is primarily an ESLint v9/config-format migration, consider restoring this rule (or explicitly documenting the decision to stop enforcing unused-variable checks).
Suggested change
| '@typescript-eslint/no-unused-vars': 'off', | |
| '@typescript-eslint/no-unused-vars': 'error', |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Description
Eslint 9 requires us to change the format of its configuration files (to effectively a single one). This PR migrates Eslint to version 9.