import-js · JounQin · Mar 16, 2025 · Mar 12, 2025 · Mar 12, 2025 · Mar 12, 2025
diff --git a/.changeset/friendly-weeks-act.md b/.changeset/friendly-weeks-act.md
@@ -0,0 +1,12 @@
+---
+"eslint-import-resolver-typescript": major
+---
+
+feat!: rewrite, speed up by using [`rspack-resolver`](https://github.com/unrs/rspack-resolver) which supports `references` natively under the hood
+
+BREAKING CHANGES:
+
+- drop Node 14 support, Node `^16.17.0 || >=18.6` is now required
+- `alwaysTryTypes` is enabled by default, you can set it as `true` to opt-out
+- array type of `project` is discouraged but still supported, single `project` with `references` are encouraged for better performance, you can enable `noWarnOnMultipleProjects` option to supress the warning message
+- root `tsconfig.json` or `jsconfig.json` will be used automatically if no `project` provided
diff --git a/.size-limit.json b/.size-limit.json
@@ -1,6 +1,6 @@
 [
  {
    "path": "./lib/index.js",
-    "limit": "3.1kB"
+    "limit": "1.5kB"
  }
 ]
diff --git a/eslint.config.js b/eslint.config.js
@@ -19,6 +19,13 @@ const config = [
      },
    },
  },
+  {
+    files: ['src/*'],
+    rules: {
+      'prefer-const': ['error', { destructuring: 'all' }],
+      'sonarjs/no-nested-assignment': 'off',
+    },
+  },
 ]

 export default config
diff --git a/package.json b/package.json
@@ -12,26 +12,21 @@
  "license": "ISC",
  "packageManager": "yarn@4.7.0",
  "engines": {
-    "node": "^14.18.0 || >=16.0.0"
+    "node": "^16.17.0 || >=18.6.0"
  },
  "main": "lib/index.cjs",
  "module": "lib/index.js",
  "exports": {
    ".": {
      "types": "./lib/index.d.ts",
-      "es2020": "./lib/index.es2020.mjs",
-      "fesm2020": "./lib/index.es2020.mjs",
-      "import": "./lib/index.js",
-      "require": "./lib/index.cjs"
+      "require": "./lib/index.cjs",
+      "default": "./lib/index.js"
    },
    "./package.json": "./package.json"
  },
-  "es2020": "lib/index.es2020.mjs",
-  "fesm2020": "lib/index.es2020.mjs",
  "types": "lib/index.d.ts",
  "files": [
    "lib",
-    "shim.d.ts",
    "!**/*.tsbuildinfo"
  ],
  "keywords": [
@@ -42,10 +37,10 @@
    "plugin"
  ],
  "scripts": {
-    "build": "run-p 'build:*'",
-    "build:r": "r -f cjs,es2020",
+    "build": "run-p -c 'build:*'",
+    "build:r": "r -f cjs",
    "build:ts": "tsc -b",
-    "eslint": "cross-env ESLINT_USE_FLAT_CONFIG=false eslint --cache",
+    "eslint": "ESLINT_USE_FLAT_CONFIG=false eslint",
    "lint": "run-p 'lint:*'",
    "lint:es": "eslint . --cache",
    "lint:tsc": "tsc --noEmit",
@@ -55,7 +50,7 @@
    "test:dotInclude": "yarn eslint --ext ts,tsx tests/dotInclude --ignore-pattern \"!.dot\"",
    "test:dotPaths": "yarn eslint --ext ts,tsx tests/dotPaths --ignore-pattern \"!.dot\"",
    "test:dotProject": "yarn eslint --ext ts,tsx tests/dotProject --ignore-pattern \"!.dot\"",
-    "test:importXResolverV3": "eslint --cache --config=tests/importXResolverV3/eslint.config.cjs tests/importXResolverV3",
+    "test:importXResolverV3": "eslint --config=tests/importXResolverV3/eslint.config.cjs tests/importXResolverV3",
    "test:multipleEslintrcs": "yarn eslint --ext ts,tsx tests/multipleEslintrcs",
    "test:multipleTsconfigs": "yarn eslint --ext ts,tsx tests/multipleTsconfigs",
    "test:nearestTsconfig": "yarn eslint --ext ts,tsx tests/nearestTsconfig",
@@ -81,11 +76,10 @@
    }
  },
  "dependencies": {
-    "@nolyfill/is-core-module": "1.0.39",
    "debug": "^4.4.0",
    "get-tsconfig": "^4.10.0",
    "is-bun-module": "^1.3.0",
-    "rspack-resolver": "^1.1.0",
+    "rspack-resolver": "^1.1.2",
    "stable-hash": "^0.0.5",
    "tinyglobby": "^0.2.12"
  },
@@ -102,7 +96,6 @@
    "@types/pnpapi": "^0.0.5",
    "@types/unist": "^3.0.3",
    "clean-pkg-json": "^1.2.1",
-    "cross-env": "^7.0.3",
    "dummy.js": "link:dummy.js",
    "eslint": "^9.22.0",
    "eslint-import-resolver-typescript": "link:.",
@@ -115,7 +108,6 @@
    "size-limit": "^11.2.0",
    "size-limit-preset-node-lib": "^0.3.0",
    "type-coverage": "^2.29.7",
-    "type-fest": "^4.37.0",
    "typescript": "~5.8.2",
    "yarn-berry-deduplicate": "^6.1.1"
  },

diff --git a/src/constants.ts b/src/constants.ts
@@ -0,0 +1,75 @@
+export const defaultConditionNames = [
+  'types',
+  'import',
+
+  // APF: https://angular.io/guide/angular-package-format
+  'esm2020',
+  'es2020',
+  'es2015',
+
+  'require',
+  'node',
+  'node-addons',
+  'browser',
+  'default',
+]
+
+/**
+ * `.mts`, `.cts`, `.d.mts`, `.d.cts`, `.mjs`, `.cjs` are not included because `.cjs` and `.mjs` must be used explicitly
+ */
+export const defaultExtensions = [
+  '.ts',
+  '.tsx',
+  '.d.ts',
+  '.js',
+  '.jsx',
+  '.json',
+  '.node',
+]
+
+export const defaultExtensionAlias = {
+  '.js': [
+    '.ts',
+    // `.tsx` can also be compiled as `.js`
+    '.tsx',
+    '.d.ts',
+    '.js',
+  ],
+  '.jsx': ['.tsx', '.d.ts', '.jsx'],
+  '.cjs': ['.cts', '.d.cts', '.cjs'],
+  '.mjs': ['.mts', '.d.mts', '.mjs'],
+}
+
+export const defaultMainFields = [
+  'types',
+  'typings',
+
+  // APF: https://angular.io/guide/angular-package-format
+  'fesm2020',
+  'fesm2015',
+  'esm2020',
+  'es2020',
+
+  'module',
+  'jsnext:main',
+
+  'main',
+]
+
+export const JS_EXT_PATTERN = /\.(?:[cm]js|jsx?)$/
+
+export const IMPORT_RESOLVER_NAME = 'eslint-import-resolver-typescript'
+
+export const interfaceVersion = 2
+
+export const DEFAULT_TSCONFIG = 'tsconfig.json'
+
+export const DEFAULT_JSCONFIG = 'jsconfig.json'
+
+export const DEFAULT_CONFIGS = [DEFAULT_TSCONFIG, DEFAULT_JSCONFIG]
+
+export const DEFAULT_TRY_PATHS = ['', ...DEFAULT_CONFIGS]
+
+export const MATCH_ALL = '**'
+
+export const DEFAULT_IGNORE = [MATCH_ALL, 'node_modules', MATCH_ALL].join('/')
diff --git a/src/helpers.ts b/src/helpers.ts
@@ -0,0 +1,73 @@
+import fs from 'node:fs'
+import path from 'node:path'
+
+/**
+ * For a scoped package, we must look in `@types/foo__bar` instead of `@types/@foo/bar`.
+ */
+export function mangleScopedPackage(moduleName: string) {
+  if (moduleName.startsWith('@')) {
+    const replaceSlash = moduleName.replace('/', '__')
+    if (replaceSlash !== moduleName) {
+      return replaceSlash.slice(1) // Take off the "@"
+    }
+  }
+  return moduleName
+}
+
+/** Remove any trailing querystring from module id. */
+export function removeQuerystring(id: string) {
+  const querystringIndex = id.lastIndexOf('?')
+  if (querystringIndex !== -1) {
+    return id.slice(0, querystringIndex)
+  }
+  return id
+}
+
+export const tryFile = (
+  filename?: string[] | string,
+  includeDir = false,
+  base = process.cwd(),
+): string => {
+  if (typeof filename === 'string') {
+    const filepath = path.resolve(base, filename)
+    return fs.existsSync(filepath) &&
+      (includeDir || fs.statSync(filepath).isFile())
+      ? filepath
+      : ''
+  }
+
+  for (const file of filename ?? []) {
+    const filepath = tryFile(file, includeDir, base)
+    if (filepath) {
+      return filepath
+    }
+  }
+
+  return ''
+}
+
+const computeAffinity = (projectDir: string, targetDir: string): number => {
+  const a = projectDir.split(path.sep)
+  const b = targetDir.split(path.sep)
+  let lca = 0
+  while (lca < a.length && lca < b.length && a[lca] === b[lca]) {
+    lca++
+  }
+  return a.length - lca + (b.length - lca)
+}
+
+export const sortProjectsByAffinity = (projects: string[], file: string) => {
+  const fileDir = path.dirname(file)
+  return projects
+    .map(project => ({
+      project,
+      affinity: computeAffinity(path.dirname(project), fileDir),
+    }))
+    .sort((a, b) => a.affinity - b.affinity)
+    .map(item => item.project)
+}
+
+export const toGlobPath = (pathname: string) => pathname.replaceAll('\\', '/')
+
+export const toNativePath = (pathname: string) =>
+  '/' === path.sep ? pathname : pathname.replaceAll('/', '\\')