Repository: eslint/eslint
File: messages/eslintrc-incompat.js (JavaScript)

Code before:
A config object is using the "parserOptions" key, which is not supported in flat config system.

Flat config uses "languageOptions.parserOptions" to specify parser options.

Please see the following page for information on how to convert your config object into the correct format:
https://eslint.org/docs/latest/use/configure/migration-guide#configuring-language-options
`,

    reportUnusedDisableDirectives: `
A config object is using the "reportUnusedDisableDirectives" key, which is not supported in flat config system.

Flat config uses "linterOptions.reportUnusedDisableDirectives" to specify files to ignore.

Please see the following page for information on how to convert your config object into the correct format:
https://eslint.org/docs/latest/use/configure/migration-guide#linter-options
`,

    root: `
A config object is using the "root" key, which is not supported in flat config system.

Flat configs always act as if they are the root config file, so this key can be safely removed.
`
};

module.exports = function({ key }) {

    return messages[key].trim();
};


Review comment (suggestion):
```suggestion
If "parserOptions" is not used directly (it may be coming from a shared config or plugin), please see the following:
```

Code after:

If you're not using "overrides" directly (it may be coming from a plugin), please see the following:
https://eslint.org/docs/latest/use/configure/migration-guide#using-eslintrc-configs-in-flat-config
`,

    parser: `
A config object is using the "parser" key, which is not supported in flat config system.

Flat config uses "languageOptions.parser" to override the default parser.

Please see the following page for information on how to convert your config object into the correct format:
https://eslint.org/docs/latest/use/configure/migration-guide#custom-parsers

If you're not using "parser" directly (it may be coming from a plugin), please see the following:
https://eslint.org/docs/latest/use/configure/migration-guide#using-eslintrc-configs-in-flat-config
`,

    parserOptions: `
A config object is using the "parserOptions" key, which is not supported in flat config system.

Flat config uses "languageOptions.parserOptions" to specify parser options.

Please see the following page for information on how to convert your config object into the correct format:
https://eslint.org/docs/latest/use/configure/migration-guide#configuring-language-options

If you're not using "parserOptions" directly (it may be coming from a plugin), please see the following:
https://eslint.org/docs/latest/use/configure/migration-guide#using-eslintrc-configs-in-flat-config
`,

    reportUnusedDisableDirectives: `
A config object is using the "reportUnusedDisableDirectives" key, which is not supported in flat config system.

Flat config uses "linterOptions.reportUnusedDisableDirectives" to specify files to ignore.

Please see the following page for information on how to convert your config object into the correct format:
https://eslint.org/docs/latest/use/configure/migration-guide#linter-options
`,

    root: `
A config object is using the "root" key, which is not supported in flat config system.

Flat configs always act as if they are the root config file, so this key can be safely removed.
`
};

module.exports = function({ key }) {

    return messages[key].trim();
};