feat(register): always resolve full file path for tsconfig and add paths if available

packages/register/__test__/read-default-config.spec.ts

@@ -2,6 +2,7 @@ import { join, dirname } from 'path'
 
 import test from 'ava'
 import { omit } from 'lodash'
+import sinon from 'sinon'
 import * as ts from 'typescript'
 
 import { readDefaultTsConfig } from '../read-default-tsconfig'
@@ -46,3 +47,39 @@ test('should RESPECT tsconfig path in subdirectory', (t) => {
   const { options } = ts.parseJsonConfigFileContent(config, ts.sys, dirname(configPath))
   t.deepEqual(omit(defaultOptions, 'files'), options)
 })
+
+test('should return default compiler options when the tsConfigPath is invalid', (t) => {
+  const configPath = join(__dirname, 'invalid', 'tsconfig.json')
+
+  delete process.env.SWC_NODE_PROJECT
+  delete process.env.TS_NODE_PROJECT
+  process.env.TS_NODE_PROJECT = configPath
+
+  const defaultOptions = readDefaultTsConfig()
+  t.deepEqual(defaultOptions, {
+    target: ts.ScriptTarget.ES2018,
+    module: ts.ModuleKind.CommonJS,
+    moduleResolution: ts.ModuleResolutionKind.NodeJs,
+    sourceMap: true,
+    esModuleInterop: true,
+  })
+})
+
+test('should RESPECT tsconfig path in subdirectory with a relative path', (t) => {
+  const configPath = join('..', '__test__', 'tsconfig.spec.json')
+  const fullConfigPath = join(__dirname, 'tsconfig.spec.json')
+
+  delete process.env.SWC_NODE_PROJECT
+  delete process.env.TS_NODE_PROJECT
+  process.env.TS_NODE_PROJECT = configPath
+
+  sinon.replace(process, 'cwd', () => __dirname)
+
+  const defaultOptions = readDefaultTsConfig()
+
+  sinon.restore()
+
+  const { config } = ts.readConfigFile(fullConfigPath, ts.sys.readFile)
+  const { options } = ts.parseJsonConfigFileContent(config, ts.sys, dirname(fullConfigPath))
+  t.deepEqual(omit(defaultOptions, 'files'), options)
+})

packages/register/read-default-tsconfig.ts

@@ -1,5 +1,5 @@
 import { existsSync } from 'fs'
-import { join, dirname } from 'path'
+import { join, dirname, resolve } from 'path'
 
 import type { Options } from '@swc-node/core'
 import { yellow } from 'colorette'
@@ -19,24 +19,31 @@ export function readDefaultTsConfig(
     esModuleInterop: true,
   }
 
-  if (tsConfigPath && existsSync(tsConfigPath)) {
-    try {
-      debug(`Read config file from ${tsConfigPath}`)
-      const { config } = ts.readConfigFile(tsConfigPath, ts.sys.readFile)
+  if (!tsConfigPath) {
+    return compilerOptions
+  }
+
+  const fullTsConfigPath = resolve(tsConfigPath)
+
+  if (!existsSync(fullTsConfigPath)) {
+    return compilerOptions
+  }
+
+  try {
+    debug(`Read config file from ${fullTsConfigPath}`)
+    const { config } = ts.readConfigFile(fullTsConfigPath, ts.sys.readFile)
 
-      const { options, errors, fileNames } = ts.parseJsonConfigFileContent(config, ts.sys, dirname(tsConfigPath))
-      if (!errors.length) {
-        compilerOptions = options
-        compilerOptions.files = fileNames
-      } else {
-        console.info(
-          yellow(`Convert compiler options from json failed, ${errors.map((d) => d.messageText).join('\n')}`),
-        )
-      }
-    } catch (e) {
-      console.info(yellow(`Read ${tsConfigPath} failed: ${(e as Error).message}`))
+    const { options, errors, fileNames } = ts.parseJsonConfigFileContent(config, ts.sys, dirname(fullTsConfigPath))
+    if (!errors.length) {
+      compilerOptions = options
+      compilerOptions.files = fileNames
+    } else {
+      console.info(yellow(`Convert compiler options from json failed, ${errors.map((d) => d.messageText).join('\n')}`))
     }
+  } catch (e) {
+    console.info(yellow(`Read ${tsConfigPath} failed: ${(e as Error).message}`))
   }
+
   return compilerOptions
 }
 
@@ -118,5 +125,6 @@ export function tsCompilerOptionsToSwcConfig(options: ts.CompilerOptions, filena
     dynamicImport: true,
     esModuleInterop: options.esModuleInterop ?? false,
     keepClassNames: true,
+    paths: options.paths as Options['paths'],
   }
 }

tsconfig.json

@@ -28,7 +28,7 @@
     "lib": ["dom", "DOM.Iterable", "ES5", "ES2015", "ES2016", "ES2017", "ES2018", "ES2019", "ES2020", "esnext"],
     "baseUrl": "./packages",
     "paths": {
-      "@swc-node/*": ["./*/src/index.ts"],
+      "@swc-node/core": ["@swc-node/core/index.ts"],
       "@swc-node/register/*": ["./register/*"]
     }
   },