Outdated peerDependencies eslint >= 3.2.1

[Mike McCready]

Issue

The eslint-plugin-cypress plugin currently defines peerDependencies of "eslint": ">= 3.2.1". This includes versions of ESLint v3, v4 and v9 which are not compatible with the current latest version of eslint-plugin-cypress@2.15.2 (including its other peerDependencies). ESLint v8 cannot be linted by @cypress/eslint-plugin-dev and replacement linting recommended by Linting a Plugin only covers ESLint v7 and above.

The intersection of supportable combinations is ESLint v7 and v8 only.

In detail:

ESLint v3 and v4

• The currently used @cypress/eslint-plugin-dev is not compatible with ESLint v3 and v4 (see #166). peerDependencies of eslint-plugin-cypress needs to be "eslint": ">=5".

ESLint v5 and v6

• To resolve issue #174 by using plugins recommended by the ESLint documentation section Linting a Plugin:

  • eslint
  • eslint-plugin-eslint-plugin
  • eslint-plugin-n

  requires a minimum of ESLint 7.0.0. This is the lowest version supported by eslint-plugin-n. peerDependencies of eslint-plugin-cypress needs to be "eslint": ">=7".

ESLint v7

• "eslint": "^7.32.0" is the currently configured version of ESLint in the master branch of eslint-plugin-cypress. This version lints with ESLint and tests with Jest successfully. This version is already covered by peerDependencies of "eslint": ">= 3.2.1".

ESLint v8

• The plugin cannot lint using ESLint v8. It tests successfully with Jest under ESLint v8. To cover ESlint v8 completely requires resolution of issue #174.

ESLint v9

• Due to breaking changes in ESLint v9 (see Migrate to v9.x related to removed API calls and flat-file related changes) the plugin eslint-plugin-cypress@2.15.2 (current latest) is not compatible with ESLint v9. peerDependencies of eslint-plugin-cypress needs to be "eslint": "<9".

Suggestion

Considering all of the above issues, eslint-plugin-cypress needs to have its peerDependencies set to the semver range:

"eslint": ">=7 <9"

This is a breaking change needing a new major release eslint-plugin-cypress of 3.x.

Implementing this change has the benefits:

• Provides users with a clear package manager incompatibilty message if they install the latest version of eslint-plugin-cypress together with ESLint 9.x (otherwise the result is the error message: "TypeError: context.getAncestors is not a function" - see issue #156))
• Allows moving forward with issue #174

[Mike McCready]

• PR #176 implements the suggestion to release a new major version which supports ESLint v7 and v8 only.

[Cypress App]

🎉 This issue has been resolved in version 3.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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