eslint use custom program

DiFuks · Dec 3, 2024 · c19259f · c19259f
1 parent 8c2e6f2
commit c19259f
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Showing 6 changed files with 457 additions and 4 deletions.
diff --git a/packages/example/eslint.config.mjs b/packages/example/eslint.config.mjs
@@ -0,0 +1,39 @@
+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,
+	tseslint.configs.strictTypeChecked,
+	tseslint.configs.stylisticTypeChecked,
+	{
+		languageOptions: {
+			parserOptions: {
+				programs: [pluginProgram],
+				tsconfigRootDir: import.meta.dirname,
+			},
+		},
+	},
+	{
+		ignores: ['dist', '*.config.*'],
+	}
+);
diff --git a/packages/example/package.json b/packages/example/package.json
@@ -6,21 +6,26 @@
     "build:fork-ts": "webpack --config webpack.config.fork-ts.js",
     "watch:tspc": "tspc --watch",
     "watch:ts-loader": "webpack --config webpack.config.ts-loader.js --watch",
-    "watch:fork-ts": "webpack --config webpack.config.fork-ts.js --watch"
+    "watch:fork-ts": "webpack --config webpack.config.fork-ts.js --watch",
+    "lint": "eslint ."
   },
   "devDependencies": {
     "@babel/core": "^7.23.6",
     "@babel/preset-env": "^7.23.6",
     "@babel/preset-typescript": "^7.23.3",
+    "@eslint/js": "^9.16.0",
     "@types/babel__core": "^7",
     "@types/babel__preset-env": "^7",
+    "@typescript-eslint/parser": "^8.17.0",
     "babel-loader": "^9.1.3",
+    "eslint": "^9.16.0",
     "fork-ts-checker-webpack-plugin": "^9.0.2",
     "ts-loader": "^9.5.1",
     "ts-node": "^10.9.2",
     "ts-overrides-plugin": "workspce:*",
     "ts-patch": "3.2.1",
     "typescript": "5.5.2",
+    "typescript-eslint": "^8.17.0",
     "webpack": "^5.96.1",
     "webpack-cli": "^5.1.4"
   },

diff --git a/packages/example/src/modern/getDate.ts b/packages/example/src/modern/getDate.ts
@@ -3,6 +3,9 @@ import { someVar } from '../legacy/getDate';
 // Parameter 'date' implicitly has an 'any' type.
 export const getDate = (date) => {
   const modern: string | undefined = undefined;
+  const alwaysStringVar = 'Some string';
+
+  alwaysStringVar?.toLowerCase();
 
   // Show `string | undefined` on hover in IDE
   console.log(someVar);

diff --git a/packages/plugin/src/cli/index.ts b/packages/plugin/src/cli/index.ts
@@ -97,6 +97,17 @@ 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/tsconfig.json b/packages/plugin/tsconfig.json
@@ -5,6 +5,7 @@
 		"outDir": "./dist",
 		"esModuleInterop": true,
 		"skipLibCheck": true,
+		"declaration": true,
 		"strict": true
 	}
 }