From 1aa6cd3ef132ab9ddd038d3ccabde17ce5637ae3 Mon Sep 17 00:00:00 2001
From: Dmitry Fuks <d.fuks@dodobrands.io>
Date: Wed, 4 Dec 2024 01:03:45 +0300
Subject: [PATCH] eslint use custom service

---
 packages/example/eslint.config.mjs | 24 +++---------------------
 packages/plugin/src/cli/index.ts   | 11 -----------
 packages/plugin/src/ide/index.ts   | 14 ++++++++++++++
 3 files changed, 17 insertions(+), 32 deletions(-)

diff --git a/packages/example/eslint.config.mjs b/packages/example/eslint.config.mjs
index 23fdfcf..8e18ed7 100644
--- a/packages/example/eslint.config.mjs
+++ b/packages/example/eslint.config.mjs
@@ -1,25 +1,5 @@
 import eslint from '@eslint/js';
 import tseslint from 'typescript-eslint';
-import * as parser from '@typescript-eslint/parser';
-import plugin from 'ts-overrides-plugin';
-import typescript from 'typescript';
-
-const parserProgram = parser.createProgram('tsconfig.json');
-const host = typescript.createCompilerHost(parserProgram.getCompilerOptions());
-const originalProgram = typescript.createProgram(parserProgram.getRootFileNames(), parserProgram.getCompilerOptions(), host);
-const pluginProgram = plugin(originalProgram, host, {
-	"ignores": ["src/ignored/**/*.{ts,tsx}"],
-	"overrides": [
-		{
-			"files": [
-				"src/modern/**/*.{ts,tsx}",
-			],
-			"compilerOptions": {
-				"strict": true,
-			},
-		},
-	]
-}, { ts: typescript });
 
 export default tseslint.config(
 	eslint.configs.recommended,
@@ -28,7 +8,9 @@ export default tseslint.config(
 	{
 		languageOptions: {
 			parserOptions: {
-				programs: [pluginProgram],
+				projectService: {
+					loadTypeScriptPlugins: true,
+				},
 				tsconfigRootDir: import.meta.dirname,
 			},
 		},
diff --git a/packages/plugin/src/cli/index.ts b/packages/plugin/src/cli/index.ts
index 72712d4..cd99608 100644
--- a/packages/plugin/src/cli/index.ts
+++ b/packages/plugin/src/cli/index.ts
@@ -97,17 +97,6 @@ const plugin: ProgramTransformer = (program, host, pluginConfig, extras) => {
 
 	return new Proxy(program, {
 		get: (target, property: keyof ts.Program) => {
-			if (property === `getCompilerOptions`) {
-				return (() => {
-					const compilerOptions = target.getCompilerOptions();
-
-					return {
-						...compilerOptions,
-						strictNullChecks: true,
-					};
-				}) as ts.Program['getCompilerOptions'];
-			}
-
 			// for watch mode - ForkTsCheckerWebpackPlugin and tspc
 			if (property === `getBindAndCheckDiagnostics`) {
 				return ((sourceFile, cancellationToken) =>
diff --git a/packages/plugin/src/ide/index.ts b/packages/plugin/src/ide/index.ts
index 1f87241..023ea3f 100644
--- a/packages/plugin/src/ide/index.ts
+++ b/packages/plugin/src/ide/index.ts
@@ -74,8 +74,22 @@ const plugin: ts.server.PluginModuleFactory = ({ typescript }) => ({
 
 		const originalLanguageServiceWithDocRegistry = typescript.createLanguageService(info.project, docRegistry);
 
+		const originalProgram = originalLanguageServiceWithDocRegistry.getProgram();
+
+		const originalProgramWithStrictNullChecks = {
+			...originalProgram,
+			getCompilerOptions: () => ({
+				...originalProgram?.getCompilerOptions(),
+				strictNullChecks: true,
+			}),
+		};
+
 		return new Proxy(originalLanguageServiceWithDocRegistry, {
 			get: (target, property: keyof ts.LanguageService) => {
+				if (property === `getProgram`) {
+					return (() => originalProgramWithStrictNullChecks) as ts.LanguageService['getProgram'];
+				}
+
 				if (property === `getQuickInfoAtPosition`) {
 					return ((fileName, position) => {
 						const overrideForFile = getLanguageServiceForFile(fileName, overrideLanguageServices, target);