Add support for comments in tsconfig.json (#11392)

Fixes #11390

packages/next/build/webpack-config.ts

@@ -11,6 +11,7 @@ import {
   PAGES_DIR_ALIAS,
 } from '../lib/constants'
 import { fileExists } from '../lib/file-exists'
+import { readFileSync } from 'fs'
 import { resolveRequest } from '../lib/resolve-request'
 import {
   CLIENT_STATIC_FILES_RUNTIME_MAIN,
@@ -58,6 +59,12 @@ const escapePathVariables = (value: any) => {
     : value
 }
 
+function parseJsonFile(path: string) {
+  const JSON5 = require('json5')
+  const contents = readFileSync(path)
+  return JSON5.parse(contents)
+}
+
 function getOptimizedAliases(isServer: boolean): { [pkg: string]: string } {
   if (isServer) {
     return {}
@@ -221,12 +228,12 @@ export default async function getBaseWebpackConfig(
   let jsConfig
   // jsconfig is a subset of tsconfig
   if (useTypeScript) {
-    jsConfig = require(tsConfigPath)
+    jsConfig = parseJsonFile(tsConfigPath)
   }
 
   const jsConfigPath = path.join(dir, 'jsconfig.json')
   if (!useTypeScript && (await fileExists(jsConfigPath))) {
-    jsConfig = require(jsConfigPath)
+    jsConfig = parseJsonFile(jsConfigPath)
   }
 
   let resolvedBaseUrl

packages/next/package.json

@@ -108,7 +108,7 @@
     "is-docker": "2.0.0",
     "is-wsl": "2.1.1",
     "jest-worker": "24.9.0",
-    "json5": "2.1.1",
+    "json5": "2.1.2",
     "jsonwebtoken": "8.5.1",
     "launch-editor": "2.2.1",
     "loader-utils": "2.0.0",

test/integration/typescript-paths/tsconfig.json

@@ -1,3 +1,4 @@
+/* This is a single line comment to check if that works */
 {
   "compilerOptions": {
     "baseUrl": ".",
@@ -10,6 +11,7 @@
         "components/alias-to-d-ts.d.ts",
         "components/alias-to-d-ts.tsx"
       ]
+      // This is a single line comment to check if that works
     },
     "esModuleInterop": true,
     "module": "esnext",

yarn.lock

@@ -4157,7 +4157,7 @@ browserify-zlib@^0.2.0:
   dependencies:
     pako "~1.0.5"
 
-browserslist@4.8.3, browserslist@^1.3.6, browserslist@^1.5.2, browserslist@^1.7.6, browserslist@^4.0.0, browserslist@^4.3.6, browserslist@^4.6.0, browserslist@^4.6.4, browserslist@^4.8.0, browserslist@^4.8.2, browserslist@^4.8.3:
+browserslist@4.8.3, browserslist@^4.0.0, browserslist@^4.3.6, browserslist@^4.6.0, browserslist@^4.6.4, browserslist@^4.8.0, browserslist@^4.8.2, browserslist@^4.8.3:
   version "4.8.3"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.8.3.tgz#65802fcd77177c878e015f0e3189f2c4f627ba44"
   integrity sha512-iU43cMMknxG1ClEZ2MDKeonKE1CCrFVkQK2AqO2YWFmvIrx4JWrvQ4w4hQez6EpVI8rHTtqh/ruHHDHSOKxvUg==
@@ -4166,6 +4166,14 @@ browserslist@4.8.3, browserslist@^1.3.6, browserslist@^1.5.2, browserslist@^1.7.
     electron-to-chromium "^1.3.322"
     node-releases "^1.1.44"
 
+browserslist@^1.3.6, browserslist@^1.5.2, browserslist@^1.7.6:
+  version "1.7.7"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-1.7.7.tgz#0bd76704258be829b2398bb50e4b62d1a166b0b9"
+  integrity sha1-C9dnBCWL6CmyOYu1Dkti0aFmsLk=
+  dependencies:
+    caniuse-db "^1.0.30000639"
+    electron-to-chromium "^1.2.7"
+
 browserstack-local@1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/browserstack-local/-/browserstack-local-1.4.0.tgz#d979cac056f57b9af159b3bcd7fdc09b4354537c"
@@ -4469,11 +4477,21 @@ caniuse-db@^1.0.30000529, caniuse-db@^1.0.30000634:
   resolved "https://registry.yarnpkg.com/caniuse-db/-/caniuse-db-1.0.30001023.tgz#f856f71af16a5a44e81f1fcefc1673912a43da72"
   integrity sha512-EnlshvE6oAum+wWwKmJNVaoqJMjIc0bLUy4Dj77VVnz1o6bzSPr1Ze9iPy6g5ycg1xD6jGU6vBmo7pLEz2MbCQ==
 
-caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000981, caniuse-lite@^1.0.30001012, caniuse-lite@^1.0.30001017, caniuse-lite@^1.0.30001019, caniuse-lite@^1.0.30001020:
+caniuse-db@^1.0.30000639:
+  version "1.0.30001038"
+  resolved "https://registry.yarnpkg.com/caniuse-db/-/caniuse-db-1.0.30001038.tgz#439606cdafff1e10e0a795a7ff72fe26965fe8ba"
+  integrity sha512-yeQ2l99M9upOgMIRfZEdes6HuPbQiRZIMBumUwdXeEQz+faSXUZtZ8xeyEdU+TlJckH09M5NtM038sjKsRa2ow==
+
+caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000981, caniuse-lite@^1.0.30001012, caniuse-lite@^1.0.30001017, caniuse-lite@^1.0.30001019:
   version "1.0.30001019"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001019.tgz#857e3fccaad2b2feb3f1f6d8a8f62d747ea648e1"
   integrity sha512-6ljkLtF1KM5fQ+5ZN0wuyVvvebJxgJPTmScOMaFuQN2QuOzvRJnWSKfzQskQU5IOU4Gap3zasYPIinzwUjoj/g==
 
+caniuse-lite@^1.0.30001020:
+  version "1.0.30001038"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001038.tgz#44da3cbca2ab6cb6aa83d1be5d324e17f141caff"
+  integrity sha512-zii9quPo96XfOiRD4TrfYGs+QsGZpb2cGiMAzPjtf/hpFgB6zCPZgJb7I1+EATeMw/o+lG8FyRAnI+CWStHcaQ==
+
 capitalize@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/capitalize/-/capitalize-1.0.0.tgz#dc802c580aee101929020d2ca14b4ca8a0ae44be"
@@ -6275,6 +6293,11 @@ ejs@^2.6.1:
   resolved "https://registry.yarnpkg.com/ejs/-/ejs-2.7.4.tgz#48661287573dcc53e366c7a1ae52c3a120eec9ba"
   integrity sha512-7vmuyh5+kuUyJKePhQfRQBhXV5Ce+RnaeeQArKu1EAMpL3WbgMt5WG6uQZpEVvYSSsxMXRKOewtDk9RaTKXRlA==
 
+electron-to-chromium@^1.2.7:
+  version "1.3.387"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.387.tgz#420677629c9791b5d36fc8847c8cc11c0934a6cb"
+  integrity sha512-jjQ6WkxrOu0rtGqY9/74Z+UEVQ7YmJU2rCX6kH4eidKP0ZK0VKB3/i1avXQ+EDwJAABKGaOAbJrcyz18P8E3aA==
+
 electron-to-chromium@^1.3.322:
   version "1.3.327"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.327.tgz#516f28b4271727004362b4ac814494ae64d9dde7"
@@ -9641,12 +9664,12 @@ json-stringify-safe@^5.0.1, json-stringify-safe@~5.0.1:
   resolved "https://registry.yarnpkg.com/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz#1296a2d58fd45f19a0f6ce01d65701e2c735b6eb"
   integrity sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus=
 
-json5@2.1.1, json5@^2.1.0:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/json5/-/json5-2.1.1.tgz#81b6cb04e9ba496f1c7005d07b4368a2638f90b6"
-  integrity sha512-l+3HXD0GEI3huGq1njuqtzYK8OYJyXMkOLtQ53pjWh89tvWS2h6l+1zMkYWqlb57+SiQodKZyvMEFb2X+KrFhQ==
+json5@2.1.2, json5@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-2.1.2.tgz#43ef1f0af9835dd624751a6b7fa48874fb2d608e"
+  integrity sha512-MoUOQ4WdiN3yxhm7NEVJSJrieAo5hNSLQ5sj05OTRHPL9HOBy8u4Bu88jsC1jvqAdN+E1bJmsUcZH+1HQxliqQ==
   dependencies:
-    minimist "^1.2.0"
+    minimist "^1.2.5"
 
 json5@^1.0.1:
   version "1.0.1"
@@ -9655,12 +9678,12 @@ json5@^1.0.1:
   dependencies:
     minimist "^1.2.0"
 
-json5@^2.1.2:
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/json5/-/json5-2.1.2.tgz#43ef1f0af9835dd624751a6b7fa48874fb2d608e"
-  integrity sha512-MoUOQ4WdiN3yxhm7NEVJSJrieAo5hNSLQ5sj05OTRHPL9HOBy8u4Bu88jsC1jvqAdN+E1bJmsUcZH+1HQxliqQ==
+json5@^2.1.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-2.1.1.tgz#81b6cb04e9ba496f1c7005d07b4368a2638f90b6"
+  integrity sha512-l+3HXD0GEI3huGq1njuqtzYK8OYJyXMkOLtQ53pjWh89tvWS2h6l+1zMkYWqlb57+SiQodKZyvMEFb2X+KrFhQ==
   dependencies:
-    minimist "^1.2.5"
+    minimist "^1.2.0"
 
 jsonfile@^4.0.0:
   version "4.0.0"