read tsconfig as tsc does

import-js · Jun 6, 2020 · dae3cd3 · dae3cd3
1 parent 77e1791
commit dae3cd3
Showing 1 changed file with 14 additions and 8 deletions.
diff --git a/src/ExportMap.js b/src/ExportMap.js
@@ -17,6 +17,8 @@ import { tsConfigLoader } from 'tsconfig-paths/lib/tsconfig-loader'
 
 import includes from 'array-includes'
 
+import {parseConfigFileTextToJson} from 'typescript'
+
 const log = debug('eslint-plugin-import:ExportMap')
 
 const exportCache = new Map()
@@ -450,14 +452,15 @@ ExportMap.parse = function (path, content, context) {
   const source = makeSourceCode(content, ast)
 
   function isEsModuleInterop() {
-    const tsConfig = tsConfigLoader({
+    const tsConfigInfo = tsConfigLoader({
       cwd: context.parserOptions && context.parserOptions.tsconfigRootDir || process.cwd(),
       getEnv: (key) => process.env[key],
     })
     try {
-      if (tsConfig.tsConfigPath !== undefined) {
-        const json = fs.readFileSync(tsConfig.tsConfigPath)
-        return JSON.parse(json).compilerOptions.esModuleInterop
+      if (tsConfigInfo.tsConfigPath !== undefined) {
+        const jsonText = fs.readFileSync(tsConfigInfo.tsConfigPath).toString()
+        const tsConfig = parseConfigFileTextToJson(tsConfigInfo.tsConfigPath, jsonText).config
+        return tsConfig.compilerOptions.esModuleInterop
       }
     } catch (e) {
       return false
@@ -565,10 +568,13 @@ ExportMap.parse = function (path, content, context) {
         'TSAbstractClassDeclaration',
         'TSModuleDeclaration',
       ]
-      const exportedDecls = ast.body.filter(({ type, id, declarations }) => includes(declTypes, type) && (
-        (id && id.name === exportedName) ||
-        (declarations && declarations.find(d => d.id.name === exportedName))
-      ))
+      const exportedDecls = ast.body.filter(
+        ({ type, id, declarations }) =>
+          includes(declTypes, type) &&
+          ((id && id.name === exportedName) ||
+            (declarations &&
+              declarations.find((d) => d.id.name === exportedName)))
+      )
       if (exportedDecls.length === 0) {
         // Export is not referencing any local declaration, must be re-exporting
         m.namespace.set('default', captureDoc(source, docStyleParsers, n))