feat: reuse eslint-module-utils/hash.js for better caching (#174)

.changeset/calm-ties-search.md

@@ -1,5 +1,5 @@
 ---
-"eslint-import-resolver-typescript": patch
+'eslint-import-resolver-typescript': patch
 ---
 
 fix: incorrect exports mapping

.changeset/ten-timers-rest.md

@@ -0,0 +1,5 @@
+---
+"eslint-import-resolver-typescript": minor
+---
+
+feat: reuse `eslint-module-utils/hash.js` for better caching

.eslintignore

@@ -1,6 +1,7 @@
 dist
 lib
 CHANGELOG.md
+/shim.d.ts
 /pnpm-lock.yml
 !/.*.cjs
 !/.changeset

.lintstagedrc.cjs

@@ -1 +1 @@
-module.exports = require('@1stg/lint-staged')
+module.exports = require('@1stg/lint-staged/tsc')

.remarkrc

@@ -1,5 +1,5 @@
 {
   "plugins": [
-    "@1stg/remark-config"
+    "@1stg/preset"
   ]
 }

README.md

@@ -12,7 +12,7 @@
 [![Code Style: Prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
 [![changesets](https://img.shields.io/badge/maintained%20with-changesets-176de3.svg)](https://github.com/changesets/changesets)
 
-This plugin adds [`TypeScript`][] support to [`eslint-plugin-import`][]
+This plugin adds [`TypeScript`][] support to [`eslint-plugin-import`][] (Or maybe you want to try [`eslint-plugin-i`][] for faster speed)
 
 This means you can:
 
@@ -189,7 +189,7 @@ Default:
 
 ### Other options
 
-You can pass through other options of [`enhanced-resolve`] directly
+You can pass through other options of [`enhanced-resolve`][] directly
 
 ### Default options
 
@@ -226,6 +226,7 @@ Detailed changes for each release are documented in [CHANGELOG.md](./CHANGELOG.m
 
 [ISC][]
 
+[`eslint-plugin-i`]: https://github.com/un-es/eslint-plugin-i
 [`eslint-plugin-import`]: https://github.com/import-js/eslint-plugin-import
 [`enhanced-resolve`]: https://github.com/webpack/enhanced-resolve
 [`typescript`]: https://www.typescriptlang.org

package.json

@@ -62,6 +62,7 @@
   "types": "lib/index.d.ts",
   "files": [
     "lib",
+    "shim.d.ts",
     "!**/*.tsbuildinfo"
   ],
   "keywords": [

shim.d.ts

@@ -0,0 +1,4 @@
+declare module 'eslint-module-utils/hash.js' {
+  import type { Hash } from 'node:crypto'
+  export const hashObject: (object: object, hash?: Hash) => Hash
+}

src/index.ts

@@ -10,6 +10,7 @@ import {
   Resolver,
   ResolverFactory,
 } from 'enhanced-resolve'
+import { hashObject } from 'eslint-module-utils/hash.js'
 import { createPathsMatcher, getTsconfig } from 'get-tsconfig'
 import type { TsConfigResult } from 'get-tsconfig'
 import isCore from 'is-core-module'
@@ -114,7 +115,8 @@ const fileSystem = fs as FileSystem
 const JS_EXT_PATTERN = /\.(?:[cm]js|jsx?)$/
 const RELATIVE_PATH_PATTERN = /^\.{1,2}(?:\/.*)?$/
 
-let previousOptions: TsResolverOptions | null | undefined
+let previousOptionsHash: string
+let optionsHash: string
 let cachedOptions: InternalResolverOptions | undefined
 
 let mappersCachedOptions: InternalResolverOptions
@@ -123,6 +125,9 @@ let mappers: Array<((specifier: string) => string[]) | null> | undefined
 let resolverCachedOptions: InternalResolverOptions
 let resolver: Resolver | undefined
 
+const digestHashObject = (value: object | null | undefined) =>
+  hashObject(value ?? {}).digest('hex')
+
 /**
  * @param source the module to resolve; i.e './some-module'
  * @param file the importing file's full path; i.e. '/usr/local/bin/file.js'
@@ -137,8 +142,11 @@ export function resolve(
   found: boolean
   path?: string | null
 } {
-  if (!cachedOptions || previousOptions !== options) {
-    previousOptions = options
+  if (
+    !cachedOptions ||
+    previousOptionsHash !== (optionsHash = digestHashObject(options))
+  ) {
+    previousOptionsHash = optionsHash
     cachedOptions = {
       ...options,
       conditionNames: options?.conditionNames ?? defaultConditionNames,

tsconfig.json

@@ -3,5 +3,5 @@
   "compilerOptions": {
     "outDir": "./lib"
   },
-  "include": ["./src"]
+  "include": ["./src", "./shim.d.ts"]
 }