feat: improve types support

Author: antfu

scripts/typegen.ts

@@ -35,8 +35,14 @@ const configs = await combine(
   yaml(),
 )
 
-const dts = await flatConfigsToRulesDTS(configs, {
+const configNames = configs.map(i => i.name).filter(Boolean) as string[]
+
+let dts = await flatConfigsToRulesDTS(configs, {
   includeAugmentation: false,
 })
 
+dts = `
+type ConfigNames = ${configNames.map(i => `'${i}'`).join(' | ')}
+${dts}`
+
 await fs.writeFile('src/typegen.d.ts', dts)

src/factory.ts

@@ -3,7 +3,7 @@ import fs from 'node:fs'
 import { isPackageExists } from 'local-pkg'
 import { FlatConfigComposer } from 'eslint-flat-config-utils'
 import type { Linter } from 'eslint'
-import type { Awaitable, OptionsConfig, TypedFlatConfigItem } from './types'
+import type { Awaitable, ConfigNames, OptionsConfig, TypedFlatConfigItem } from './types'
 import {
   astro,
   comments,
@@ -72,8 +72,8 @@ export const defaultPluginRenaming = {
  */
 export function antfu(
   options: OptionsConfig & TypedFlatConfigItem = {},
-  ...userConfigs: Awaitable<TypedFlatConfigItem | TypedFlatConfigItem[] | FlatConfigComposer<any> | Linter.FlatConfig[]>[]
-): FlatConfigComposer<TypedFlatConfigItem> {
+  ...userConfigs: Awaitable<TypedFlatConfigItem | TypedFlatConfigItem[] | FlatConfigComposer<any, any> | Linter.FlatConfig[]>[]
+): FlatConfigComposer<TypedFlatConfigItem, ConfigNames> {
   const {
     astro: enableAstro = false,
     autoRenamePlugins = true,
@@ -254,7 +254,7 @@ export function antfu(
   if (Object.keys(fusedConfig).length)
     configs.push([fusedConfig])
 
-  let composer = new FlatConfigComposer<TypedFlatConfigItem>()
+  let composer = new FlatConfigComposer<TypedFlatConfigItem, ConfigNames>()
 
   composer = composer
     .append(

src/types.ts

@@ -4,30 +4,22 @@ import type { Options as VueBlocksOptions } from 'eslint-processor-vue-blocks'
 import type { Linter } from 'eslint'
 import type { StylisticCustomizeOptions } from '@stylistic/eslint-plugin'
 import type { VendoredPrettierOptions } from './vender/prettier-types'
-import type { RuleOptions } from './typegen'
+import type { ConfigNames, RuleOptions } from './typegen'
 
 export type Awaitable<T> = T | Promise<T>
 
 export type Rules = RuleOptions
 
-export type TypedFlatConfigItem = Omit<Linter.FlatConfig, 'plugins'> & {
-  /**
-   * Custom name of each config item
-   */
-  name?: string
+export type { ConfigNames }
 
+export type TypedFlatConfigItem = Omit<Linter.FlatConfig<Linter.RulesRecord & Rules>, 'plugins'> & {
   // Relax plugins type limitation, as most of the plugins did not have correct type info yet.
   /**
    * An object containing a name-value mapping of plugin names to plugin objects. When `files` is specified, these plugins are only available to the matching files.
    *
    * @see [Using plugins in your configuration](https://eslint.org/docs/latest/user-guide/configuring/configuration-files-new#using-plugins-in-your-configuration)
    */
   plugins?: Record<string, any>
-
-  /**
-   * An object containing a name-value mapping of rules to use.
-   */
-  rules?: Linter.RulesRecord & Rules
 }
 
 export interface OptionsFiles {