feat: add support for BiomeJS config (#480)

Co-authored-by: cipherlogs <73669345+0x78logs@users.noreply.github.com>

Author: cipherlogs

Diff for: README.md

@@ -320,6 +320,13 @@ AutoImport({
     filepath: './.eslintrc-auto-import.json', // Default `./.eslintrc-auto-import.json`
     globalsPropValue: true, // Default `true`, (true | false | 'readonly' | 'readable' | 'writable' | 'writeable')
   },
+
+  // Generate corresponding .biomelintrc-auto-import.json file.
+  // biomejs extends Docs - https://biomejs.dev/guides/how-biome-works/#the-extends-option
+  biomelintrc: {
+    enabled: false, // Default `false`
+    filepath: './.biomelintrc-auto-import.json', // Default `./.biomelintrc-auto-import.json`
+  },
 })
 ```
 

Diff for: src/core/biomelintrc.ts

@@ -0,0 +1,16 @@
+import type { Import } from 'unimport'
+
+export function generateBiomeLintConfigs(
+  imports: Import[],
+) {
+  const names
+    = imports
+      .map(i => i.as ?? i.name)
+      .filter(Boolean)
+      .sort()
+
+  const config = { javascript: { globals: names } }
+  const jsonBody = JSON.stringify(config, null, 2)
+
+  return jsonBody
+}

Diff for: src/core/ctx.ts

@@ -12,8 +12,9 @@ import fg from 'fast-glob'
 import { vueTemplateAddon } from 'unimport/addons'
 import MagicString from 'magic-string'
 import { presets } from '../presets'
-import type { ESLintGlobalsPropValue, ESLintrc, ImportExtended, Options } from '../types'
+import type { BiomeLintrc, ESLintGlobalsPropValue, ESLintrc, ImportExtended, Options } from '../types'
 import { generateESLintConfigs } from './eslintrc'
+import { generateBiomeLintConfigs } from './biomelintrc'
 import { resolversAddon } from './resolvers'
 
 function resolveGlobsExclude(root: string, glob: string) {
@@ -48,6 +49,10 @@ export function createContext(options: Options = {}, root = process.cwd()) {
   eslintrc.filepath = eslintrc.filepath || './.eslintrc-auto-import.json'
   eslintrc.globalsPropValue = eslintrc.globalsPropValue === undefined ? true : eslintrc.globalsPropValue
 
+  const biomelintrc: BiomeLintrc = options.biomelintrc || {}
+  biomelintrc.enabled = biomelintrc.enabled !== undefined
+  biomelintrc.filepath = biomelintrc.filepath || './.biomelintrc-auto-import.json'
+
   const resolvers = options.resolvers ? [options.resolvers].flat(2) : []
 
   // When "options.injectAtEnd" is undefined or true, it's true.
@@ -177,6 +182,10 @@ ${dts}`.trim()}\n`
     return generateESLintConfigs(await unimport.getImports(), eslintrc, await parseESLint())
   }
 
+  async function generateBiomeLint() {
+    return generateBiomeLintConfigs(await unimport.getImports())
+  }
+
   const writeConfigFilesThrottled = throttle(500, writeConfigFiles, { noLeading: false })
 
   async function writeFile(filePath: string, content = '') {
@@ -186,6 +195,8 @@ ${dts}`.trim()}\n`
 
   let lastDTS: string | undefined
   let lastESLint: string | undefined
+  let lastBiomeLint: string | undefined
+
   async function writeConfigFiles() {
     const promises: any[] = []
     if (dts) {
@@ -215,6 +226,18 @@ ${dts}`.trim()}\n`
         }),
       )
     }
+
+    if (biomelintrc.enabled) {
+      promises.push(
+        generateBiomeLint().then((content) => {
+          if (content !== lastBiomeLint) {
+            lastBiomeLint = content
+            return writeFile(biomelintrc.filepath!, content)
+          }
+        }),
+      )
+    }
+
     return Promise.all(promises)
   }
 

Diff for: src/types.ts

@@ -70,6 +70,19 @@ export interface ESLintrc {
   globalsPropValue?: ESLintGlobalsPropValue
 }
 
+export interface BiomeLintrc {
+  /**
+   * @default false
+   */
+  enabled?: boolean
+  /**
+   * Filepath to save the generated eslint config
+   *
+   * @default './.eslintrc-auto-import.json'
+   */
+  filepath?: string
+}
+
 export interface Options {
   /**
    * Preset names or custom imports map