From 444012167b40862dd4d2112bb62e8371b050f79e Mon Sep 17 00:00:00 2001
From: Ivan Goncharov <ivan.goncharov.ua@gmail.com>
Date: Mon, 18 Oct 2021 13:46:13 +0300
Subject: [PATCH] Add message that we only support TS >= 4.1.0

---
 integrationTests/ts/basic-test.ts |  2 +-
 package.json                      |  9 ++++++++-
 resources/build-npm.js            | 16 +++++++++++++++-
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/integrationTests/ts/basic-test.ts b/integrationTests/ts/basic-test.ts
index 76b92a0c0a1..ce36184837f 100644
--- a/integrationTests/ts/basic-test.ts
+++ b/integrationTests/ts/basic-test.ts
@@ -1,4 +1,4 @@
-import type { ExecutionResult } from 'graphql/execution';
+import type { ExecutionResult } from 'graphql/execution/execute';
 
 import { graphqlSync } from 'graphql';
 import { GraphQLString, GraphQLSchema, GraphQLObjectType } from 'graphql/type';
diff --git a/package.json b/package.json
index 160546618ea..953f2bfe027 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,14 @@
   "private": true,
   "main": "index",
   "module": "index.mjs",
-  "types": "index.d.ts",
+  "types": "NotSupportedTSVersion.d.ts",
+  "typesVersions": {
+    ">=4.1.0": {
+      "*": ["index.d.ts"],
+      "*/*": ["*/index.d.ts"],
+      "*/*/*": ["*/*"]
+    }
+  },
   "sideEffects": false,
   "homepage": "https://github.com/graphql/graphql-js",
   "bugs": {
diff --git a/resources/build-npm.js b/resources/build-npm.js
index 2e4b723dd04..f71ea32cdfd 100644
--- a/resources/build-npm.js
+++ b/resources/build-npm.js
@@ -18,6 +18,8 @@ if (require.main === module) {
   fs.rmSync('./npmDist', { recursive: true, force: true });
   fs.mkdirSync('./npmDist');
 
+  const packageJSON = buildPackageJSON();
+
   const srcFiles = readdirRecursive('./src', { ignoreDir: /^__.*__$/ });
   for (const filepath of srcFiles) {
     const srcPath = path.join('./src', filepath);
@@ -48,11 +50,23 @@ if (require.main === module) {
     'Fail to generate `*.d.ts` files, please run `npm run check`',
   );
 
+  assert(packageJSON.types, 'Missing "types".');
+  const supportedTSVersions = Object.keys(packageJSON.typesVersions);
+  assert(
+    supportedTSVersions.length === 1,
+    'Property "typesVersions" should have exactly one key.',
+  );
+  // TODO: revisit once TS implements https://github.com/microsoft/TypeScript/issues/44795
+  fs.writeFileSync(
+    path.join('./npmDist', packageJSON.types),
+    // Provoke syntax error to show this message
+    `"Package 'graphql' support only TS versions that are ${supportedTSVersions[0]}".`,
+  );
+
   fs.copyFileSync('./LICENSE', './npmDist/LICENSE');
   fs.copyFileSync('./README.md', './npmDist/README.md');
 
   // Should be done as the last step so only valid packages can be published
-  const packageJSON = buildPackageJSON();
   writeGeneratedFile('./npmDist/package.json', JSON.stringify(packageJSON));
 
   showDirStats('./npmDist');