feat: no longer use tsconfck

package.json

@@ -28,7 +28,6 @@
     "strip-ansi": "^6.0.1",
     "supports-color": "^8.1.1",
     "supports-hyperlinks": "^2.2.0",
-    "tsconfck": "^3.0.0",
     "widest-line": "^3.1.0",
     "wordwrap": "^1.0.0",
     "wrap-ansi": "^7.0.0"

src/config/ts-node.ts

@@ -4,14 +4,15 @@ import * as TSNode from 'ts-node'
 import {memoizedWarn} from '../errors'
 import {Plugin, TSConfig} from '../interfaces'
 import {settings} from '../settings'
-import {existsSync, readTSConfig} from '../util/fs'
+import {existsSync} from '../util/fs'
+import {readTSConfig} from '../util/read-tsconfig'
 import {isProd} from '../util/util'
 import Cache from './cache'
 import {Debug} from './util'
 // eslint-disable-next-line new-cap
 const debug = Debug('ts-node')
 
-export const TS_CONFIGS: Record<string, TSConfig> = {}
+export const TS_CONFIGS: Record<string, TSConfig | undefined> = {}
 const REGISTERED = new Set<string>()
 
 function isErrno(error: any): error is NodeJS.ErrnoException {
@@ -22,7 +23,7 @@ async function loadTSConfig(root: string): Promise<TSConfig | undefined> {
   try {
     if (TS_CONFIGS[root]) return TS_CONFIGS[root]
 
-    TS_CONFIGS[root] = await readTSConfig(join(root, 'tsconfig.json'))
+    TS_CONFIGS[root] = await readTSConfig(root)
 
     return TS_CONFIGS[root]
   } catch (error) {

src/util/fs.ts

@@ -2,8 +2,6 @@ import {Stats, existsSync as fsExistsSync, readFileSync} from 'node:fs'
 import {readFile, stat} from 'node:fs/promises'
 import {join} from 'node:path'
 
-import {mergeNestedObjects} from './util'
-
 export function requireJson<T>(...pathParts: string[]): T {
   return JSON.parse(readFileSync(join(...pathParts), 'utf8'))
 }
@@ -71,10 +69,3 @@ export async function safeReadJson<T>(path: string): Promise<T | undefined> {
 export function existsSync(path: string): boolean {
   return fsExistsSync(path)
 }
-
-export async function readTSConfig(path: string) {
-  const {parse} = await import('tsconfck')
-  const result = await parse(path)
-  const tsNodeOpts = mergeNestedObjects(result.extended ?? [result], 'tsconfig.ts-node')
-  return {...result.tsconfig, 'ts-node': tsNodeOpts}
-}

src/util/read-tsconfig.ts

@@ -0,0 +1,89 @@
+import makeDebug from 'debug'
+import {readFile, readdir} from 'node:fs/promises'
+import {dirname, join} from 'node:path'
+
+import {memoizedWarn} from '../errors'
+import {TSConfig} from '../interfaces'
+import {mergeNestedObjects} from './util'
+
+const debug = makeDebug('read-tsconfig')
+
+function resolve(root: string, name: string): string | undefined {
+  try {
+    return require.resolve(name, {paths: [root]})
+  } catch {
+    // return undefined
+  }
+}
+
+async function upUntil(path: string, test: (path: string) => Promise<boolean>): Promise<string | undefined> {
+  let result: boolean | undefined
+  try {
+    result = await test(path)
+  } catch {
+    result = false
+  }
+
+  if (result) return path
+
+  const parent = dirname(path)
+  if (parent === path) return
+
+  return upUntil(parent, test)
+}
+
+export async function readTSConfig(root: string): Promise<TSConfig | undefined> {
+  const found: Record<string, any>[] = []
+
+  let typescript: typeof import('typescript') | undefined
+  try {
+    typescript = require('typescript')
+  } catch {
+    try {
+      typescript = require(root + '/node_modules/typescript')
+    } catch {}
+  }
+
+  if (!typescript) {
+    memoizedWarn(
+      'Could not find typescript. Please ensure that typescript is a devDependency. Falling back to compiled source.',
+    )
+    return
+  }
+
+  const read = async (path: string): Promise<unknown> => {
+    const localRoot = await upUntil(path, async (p) =>
+      // eslint-disable-next-line unicorn/no-await-expression-member
+      (await readdir(p)).includes('package.json'),
+    )
+    if (!localRoot) return
+
+    try {
+      const contents = await readFile(path, 'utf8')
+      const parsed = typescript?.parseConfigFileTextToJson(path, contents).config
+
+      found.push(parsed)
+
+      if (parsed.extends) {
+        if (parsed.extends.startsWith('.')) {
+          const nextPath = resolve(localRoot, parsed.extends)
+          return nextPath ? read(nextPath) : undefined
+        }
+
+        const resolved = resolve(localRoot, parsed.extends)
+        if (resolved) return read(resolved)
+      }
+
+      return parsed
+    } catch (error) {
+      debug(error)
+    }
+  }
+
+  await read(join(root, 'tsconfig.json'))
+
+  return {
+    compilerOptions: mergeNestedObjects(found, 'compilerOptions'),
+    'ts-node': mergeNestedObjects(found, 'ts-node'),
+  }
+}

test/config/ts-node.test.ts

@@ -5,7 +5,7 @@ import * as tsNode from 'ts-node'
 
 import * as configTsNode from '../../src/config/ts-node'
 import {Interfaces, settings} from '../../src/index'
-import * as util from '../../src/util/fs'
+import * as util from '../../src/util/read-tsconfig'
 
 const root = resolve(__dirname, 'fixtures/typescript')
 const tsSource = 'src/hooks/init.ts'
@@ -77,7 +77,7 @@ describe('tsPath', () => {
   })
 
   it('should resolve .js with no rootDir and outDir', async () => {
-    sandbox.stub(util, 'readTSConfig').resolves({compilerOptions: {strict: true}})
+    sandbox.stub(util, 'readTSConfig').resolves({compilerOptions: {sourceMap: true}})
     const result = await configTsNode.tsPath(root, jsCompiled)
     expect(result).to.equal(join(root, jsCompiled))
   })

yarn.lock

@@ -994,7 +994,7 @@
   dependencies:
     "@types/color-convert" "*"
 
-"@types/debug@^4.1.12":
+"@types/debug@^4.1.10":
   version "4.1.12"
   resolved "https://registry.yarnpkg.com/@types/debug/-/debug-4.1.12.tgz#a155f21690871953410df4b6b6f53187f0500917"
   integrity sha512-vIChWdVG3LG1SMxEvI/AK+FWJthlrqlTu7fbrlywTkkaONwk/UAGaULXRlf8vkzFBLVm0zkMdCquhL5aOjhXPQ==
@@ -6700,11 +6700,6 @@ ts-node@^10.8.1, ts-node@^10.9.1:
     v8-compile-cache-lib "^3.0.1"
     yn "3.1.1"
 
-tsconfck@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/tsconfck/-/tsconfck-3.0.0.tgz#b469f1ced12973bbec3209a55ed8de3bb04223c9"
-  integrity sha512-w3wnsIrJNi7avf4Zb0VjOoodoO0woEqGgZGQm+LHH9przdUI+XDKsWAXwxHA1DaRTjeuZNcregSzr7RaA8zG9A==
-
 tsconfig-paths@^3.10.1, tsconfig-paths@^3.14.2:
   version "3.14.2"
   resolved "https://registry.yarnpkg.com/tsconfig-paths/-/tsconfig-paths-3.14.2.tgz#6e32f1f79412decd261f92d633a9dc1cfa99f088"