fix: support long running "watch" lint sessions (#973)

.eslintrc.js

@@ -35,6 +35,7 @@ module.exports = {
     //
 
     'comma-dangle': ['error', 'always-multiline'],
+    'constructor-super': 'off',
     curly: ['error', 'all'],
     'no-mixed-operators': 'error',
     'no-console': 'error',
@@ -113,7 +114,8 @@ module.exports = {
     ecmaFeatures: {
       jsx: false,
     },
-    project: './tsconfig.base.json',
+    project: ['./tsconfig.eslint.json', './packages/*/tsconfig.json'],
+    tsconfigRootDir: __dirname,
   },
   overrides: [
     {

.gitignore

@@ -57,9 +57,12 @@ jspm_packages/
 # next.js build output
 .next
 
-.DS_Store
-.idea
-dist
 
 # Editor-specific metadata folders
 .vs
+
+.DS_Store
+.idea
+dist
+*.tsbuildinfo
+.watchmanconfig

.vscode/settings.json

@@ -22,5 +22,6 @@
   "javascript.preferences.importModuleSpecifier": "auto",
   "typescript.preferences.importModuleSpecifier": "auto",
   "javascript.preferences.quoteStyle": "single",
-  "typescript.preferences.quoteStyle": "single"
+"typescript.preferences.quoteStyle": "single",
+"editor.defaultFormatter": "esbenp.prettier-vscode"
 }

package.json

@@ -33,7 +33,7 @@
     "pre-push": "yarn format-check",
     "postinstall": "lerna bootstrap && yarn build && lerna link && npm run check-clean-workspace-after-install && opencollective-postinstall",
     "check-clean-workspace-after-install": "git diff --quiet --exit-code",
-    "test": "lerna run test --parallel",
+    "test": "lerna run test --concurrency 1",
     "typecheck": "lerna run typecheck"
   },
   "config": {
@@ -70,7 +70,6 @@
     "lint-staged": "^9.2.5",
     "opencollective-postinstall": "^2.0.2",
     "prettier": "^1.18.2",
-    "rimraf": "^3.0.0",
     "ts-jest": "^24.0.0",
     "ts-node": "^8.3.0",
     "tslint": "^5.19.0",

packages/eslint-plugin-tslint/package.json

@@ -23,12 +23,12 @@
   },
   "license": "MIT",
   "scripts": {
-    "build": "tsc -p tsconfig.build.json",
-    "clean": "rimraf dist/",
+    "build": "tsc -b tsconfig.build.json",
+    "clean": "tsc -b tsconfig.build.json --clean",
     "format": "prettier --write \"./**/*.{ts,js,json,md}\" --ignore-path ../../.prettierignore",
-    "prebuild": "npm run clean",
+    "lint": "eslint . --ext .js,.ts --ignore-path='../../.eslintignore'",
     "test": "jest --coverage",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc -p tsconfig.json --noEmit"
   },
   "dependencies": {
     "@typescript-eslint/experimental-utils": "2.3.3",

packages/eslint-plugin-tslint/tsconfig.build.json

@@ -1,7 +1,14 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "outDir": "./dist"
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "resolveJsonModule": true
   },
-  "include": ["src"]
+  "include": ["src"],
+  "references": [
+    { "path": "../experimental-utils/tsconfig.build.json" },
+    { "path": "../parser/tsconfig.build.json" },
+    { "path": "../typescript-estree/tsconfig.build.json" }
+  ]
 }

packages/eslint-plugin-tslint/tsconfig.json

@@ -1,5 +1,9 @@
 {
   "extends": "./tsconfig.build.json",
+  "compilerOptions": {
+    "rootDir": ".",
+    "noEmit": true
+  },
   "include": ["src", "tests"],
   "exclude": ["tests/test-project", "tests/test-tslint-rules-directory"]
 }

packages/eslint-plugin/package.json

@@ -29,15 +29,15 @@
   "license": "MIT",
   "main": "dist/index.js",
   "scripts": {
-    "build": "tsc -p tsconfig.build.json",
+    "build": "tsc -b tsconfig.build.json",
     "check:docs": "../../node_modules/.bin/ts-node --files ./tools/validate-docs/index.ts",
     "check:configs": "../../node_modules/.bin/ts-node --files ./tools/validate-configs/index.ts",
-    "clean": "rimraf dist/",
+    "clean": "tsc -b tsconfig.build.json --clean",
     "format": "prettier --write \"./**/*.{ts,js,json,md}\" --ignore-path ../../.prettierignore",
     "generate:configs": "../../node_modules/.bin/ts-node --files tools/generate-configs.ts",
-    "prebuild": "npm run clean",
+    "lint": "eslint . --ext .js,.ts --ignore-path='../../.eslintignore'",
     "test": "jest --coverage",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc -p tsconfig.json --noEmit"
   },
   "dependencies": {
     "@typescript-eslint/experimental-utils": "2.3.3",

packages/eslint-plugin/tests/RuleTester.ts

@@ -1,4 +1,5 @@
 import { TSESLint, ESLintUtils } from '@typescript-eslint/experimental-utils';
+import { clearCaches } from '@typescript-eslint/parser';
 import * as path from 'path';
 
 const parser = '@typescript-eslint/parser';
@@ -74,4 +75,10 @@ function getFixturesRootDir(): string {
 
 const { batchedSingleLineTests } = ESLintUtils;
 
+// make sure that the parser doesn't hold onto file handles between tests
+// on linux (i.e. our CI env), there can be very a limited number of watch handles available
+afterAll(() => {
+  clearCaches();
+});
+
 export { RuleTester, getFixturesRootDir, batchedSingleLineTests };

packages/eslint-plugin/tsconfig.build.json

@@ -5,12 +5,13 @@
     "declaration": false,
     "declarationMap": false,
     "outDir": "./dist",
+    "rootDir": "./src",
     "resolveJsonModule": true
   },
-  "include": [
-    "src",
-    "typings",
-    // include the parser's ambient typings because the parser exports them in its type defs
-    "../parser/typings"
+  "include": ["src", "typings"],
+  "references": [
+    { "path": "../experimental-utils/tsconfig.build.json" },
+    { "path": "../parser/tsconfig.build.json" },
+    { "path": "../typescript-estree/tsconfig.build.json" }
   ]
 }

packages/eslint-plugin/tsconfig.json

@@ -1,4 +1,8 @@
 {
   "extends": "./tsconfig.build.json",
+  "compilerOptions": {
+    "rootDir": ".",
+    "noEmit": true
+  },
   "include": ["src", "typings", "tests", "tools"]
 }

packages/experimental-utils/package.json

@@ -28,12 +28,12 @@
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "scripts": {
-    "test": "jest --coverage",
-    "prebuild": "npm run clean",
-    "build": "tsc -p tsconfig.build.json",
-    "clean": "rimraf dist/",
+    "build": "tsc -b tsconfig.build.json",
+    "clean": "tsc -b tsconfig.build.json --clean",
     "format": "prettier --write \"./**/*.{ts,js,json,md}\" --ignore-path ../../.prettierignore",
-    "typecheck": "tsc --noEmit"
+    "lint": "eslint . --ext .js,.ts --ignore-path='../../.eslintignore'",
+    "test": "jest --coverage",
+    "typecheck": "tsc -p tsconfig.json --noEmit"
   },
   "dependencies": {
     "@types/json-schema": "^7.0.3",

packages/experimental-utils/src/ts-eslint/ParserOptions.ts

@@ -1,21 +1,22 @@
 export interface ParserOptions {
-  loc?: boolean;
   comment?: boolean;
-  range?: boolean;
-  tokens?: boolean;
-  sourceType?: 'script' | 'module';
-  ecmaVersion?: 3 | 5 | 6 | 7 | 8 | 9 | 10 | 2015 | 2016 | 2017 | 2018 | 2019;
   ecmaFeatures?: {
     globalReturn?: boolean;
     jsx?: boolean;
   };
+  ecmaVersion?: 3 | 5 | 6 | 7 | 8 | 9 | 10 | 2015 | 2016 | 2017 | 2018 | 2019;
+  errorOnTypeScriptSyntacticAndSemanticIssues?: boolean;
+  errorOnUnknownASTType?: boolean;
+  extraFileExtensions?: string[];
   // ts-estree specific
   filePath?: string;
+  loc?: boolean;
+  noWatch?: boolean;
   project?: string | string[];
-  useJSXTextNode?: boolean;
-  errorOnUnknownASTType?: boolean;
-  errorOnTypeScriptSyntacticAndSemanticIssues?: boolean;
+  range?: boolean;
+  sourceType?: 'script' | 'module';
+  tokens?: boolean;
   tsconfigRootDir?: string;
-  extraFileExtensions?: string[];
+  useJSXTextNode?: boolean;
   warnOnUnsupportedTypeScriptVersion?: boolean;
 }

packages/experimental-utils/src/ts-eslint/RuleTester.ts

@@ -50,16 +50,32 @@ interface RuleTesterConfig {
   parser: string;
   parserOptions?: ParserOptions;
 }
-declare interface RuleTester {
+
+// the cast on the extends is so that we don't want to have the built type defs to attempt to import eslint
+class RuleTester extends (ESLintRuleTester as {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  new (...args: unknown[]): any;
+}) {
+  constructor(config?: RuleTesterConfig) {
+    super(config);
+
+    // nobody will ever need watching in tests
+    // so we can give everyone a perf win by disabling watching
+    if (config && config.parserOptions && config.parserOptions.project) {
+      config.parserOptions.noWatch =
+        typeof config.parserOptions.noWatch === 'boolean' || true;
+    }
+  }
+
   run<TMessageIds extends string, TOptions extends Readonly<unknown[]>>(
     name: string,
     rule: RuleModule<TMessageIds, TOptions>,
     tests: RunTests<TMessageIds, TOptions>,
-  ): void;
+  ): void {
+    // this method is only defined here because we lazily type the eslint import with `any`
+    super.run(name, rule, tests);
+  }
 }
-const RuleTester = ESLintRuleTester as {
-  new (config?: RuleTesterConfig): RuleTester;
-};
 
 export {
   InvalidTestCase,

packages/experimental-utils/tsconfig.build.json

@@ -1,9 +1,11 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
+    "composite": true,
     "outDir": "./dist",
     "rootDir": "./src",
     "resolveJsonModule": true
   },
-  "include": ["src", "typings"]
+  "include": ["src", "typings"],
+  "references": [{ "path": "../typescript-estree/tsconfig.build.json" }]
 }

packages/experimental-utils/tsconfig.json

@@ -1,8 +1,8 @@
 {
-  "extends": "../../tsconfig.base.json",
+  "extends": "./tsconfig.build.json",
   "compilerOptions": {
-    "outDir": "./dist",
-    "resolveJsonModule": true
+    "rootDir": ".",
+    "noEmit": true
   },
   "include": ["src", "typings", "tests", "tools"]
 }

packages/parser/package.json

@@ -31,12 +31,12 @@
     "eslint"
   ],
   "scripts": {
-    "build": "tsc -p tsconfig.build.json",
-    "clean": "rimraf dist/",
+    "build": "tsc -b tsconfig.build.json",
+    "clean": "tsc -b tsconfig.build.json --clean",
     "format": "prettier --write \"./**/*.{ts,js,json,md}\" --ignore-path ../../.prettierignore",
-    "prebuild": "npm run clean",
+    "lint": "eslint . --ext .js,.ts --ignore-path='../../.eslintignore'",
     "test": "jest --coverage",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc -p tsconfig.json --noEmit"
   },
   "peerDependencies": {
     "eslint": "^5.0.0 || ^6.0.0"

packages/parser/src/parser.ts

@@ -115,3 +115,4 @@ export function parseForESLint(
 }
 
 export { ParserServices, ParserOptions };
+export { clearCaches } from '@typescript-eslint/typescript-estree';

packages/parser/tests/lib/jsx.ts

@@ -1,6 +1,6 @@
+import filesWithKnownIssues from '@typescript-eslint/shared-fixtures/jsx-known-issues';
 import fs from 'fs';
 import glob from 'glob';
-import filesWithKnownIssues from '../../../shared-fixtures/jsx-known-issues';
 import {
   createScopeSnapshotTestBlock,
   formatSnapshotName,

packages/parser/tsconfig.build.json

@@ -1,8 +1,14 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "declaration": true,
-    "outDir": "./dist"
+    "composite": true,
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "resolveJsonModule": true
   },
-  "include": ["src"]
+  "include": ["src"],
+  "references": [
+    { "path": "../experimental-utils/tsconfig.build.json" },
+    { "path": "../typescript-estree/tsconfig.build.json" }
+  ]
 }

packages/parser/tsconfig.json

@@ -1,5 +1,9 @@
 {
   "extends": "./tsconfig.build.json",
+  "compilerOptions": {
+    "rootDir": ".",
+    "noEmit": true
+  },
   "include": ["src", "tests", "tools"],
   "exclude": ["tests/fixtures"]
 }

packages/typescript-estree/package.json

@@ -31,16 +31,15 @@
     "syntax"
   ],
   "scripts": {
-    "ast-alignment-tests": "jest spec.ts",
-    "build": "tsc -p tsconfig.build.json",
-    "clean": "rimraf dist/",
+    "build": "tsc -b tsconfig.build.json",
+    "clean": "tsc -b tsconfig.build.json --clean",
     "format": "prettier --write \"./**/*.{ts,js,json,md}\" --ignore-path ../../.prettierignore",
-    "prebuild": "npm run clean",
+    "lint": "eslint . --ext .js,.ts --ignore-path='../../.eslintignore'",
     "test": "jest --coverage",
-    "typecheck": "tsc --noEmit",
-    "unit-tests": "jest \"./tests/lib/.*\""
+    "typecheck": "tsc -p tsconfig.json --noEmit"
   },
   "dependencies": {
+    "chokidar": "^3.0.2",
     "glob": "^7.1.4",
     "is-glob": "^4.0.1",
     "lodash.unescape": "4.0.1",
@@ -56,10 +55,12 @@
     "@types/lodash.isplainobject": "^4.0.4",
     "@types/lodash.unescape": "^4.0.4",
     "@types/semver": "^6.0.1",
+    "@types/tmp": "^0.1.0",
     "@typescript-eslint/shared-fixtures": "2.3.3",
     "babel-code-frame": "^6.26.0",
     "glob": "^7.1.4",
     "lodash.isplainobject": "4.0.6",
+    "tmp": "^0.1.0",
     "typescript": "*"
   }
 }