Upgrade to eslint v9

.depcheckrc.yml

@@ -6,6 +6,8 @@ ignores:
   - "@types/vscode-webview" # provides VSCodeAPI
   - "@vscode/vsce"
   - depcheck
+  - eslint-formatter-gha
+  - eslint-formatter-unix
   - mochawesome
   - mochawesome-report-generator
   - ovsx

.pre-commit-config.yaml

@@ -13,6 +13,7 @@ ci:
     - yarn-dedupe
     - codecov
     - depcheck
+    - eslint
 exclude: >
   (?x)^(
     .config/requirements.in|
@@ -21,7 +22,7 @@ exclude: >
 minimum_pre_commit_version: 2.9.0 # types_or
 repos:
   - repo: https://github.com/streetsidesoftware/cspell-cli
-    rev: v8.6.1
+    rev: v8.7.0
     hooks:
       - id: cspell
         # name: Spell check with cspell
@@ -48,6 +49,22 @@ repos:
         language: system
         pass_filenames: false
         always_run: true
+      - id: eslint
+        name: eslint
+        entry: npx eslint
+        language: system
+        verbose: true # do not remove, as this allows warnings to be displayed on GHA
+        args:
+          # default format is not vscode friendly
+          - --color
+          - --format=gha
+          - --format=unix
+          - --fix
+          # - --max-warnings
+          # - "0"
+        files: \.m?[jt]sx?$ # *.js, *.jsx, *.ts and *.tsx
+        types: [file]
+
       - id: git-dirty
         name: Check if git reports dirty
         entry: git diff --exit-code
@@ -80,7 +97,7 @@ repos:
       #   entry: npx yarn npm audit
 
   - repo: https://github.com/pre-commit/pre-commit-hooks.git
-    rev: v4.5.0
+    rev: v4.6.0
     hooks:
       - id: end-of-file-fixer
         exclude: >
@@ -153,26 +170,3 @@ repos:
     hooks:
       - id: commitlint
         stages: [commit-msg]
-  - repo: https://github.com/pre-commit/mirrors-eslint
-    rev: v9.0.0-rc.0
-    hooks:
-      - id: eslint
-        args:
-          # default format is not vscode friendly
-          - --color
-          - --format=unix
-          - --fix
-          - --max-warnings
-          - "0"
-        additional_dependencies:
-          - "@typescript-eslint/eslint-plugin"
-          - "@typescript-eslint/parser"
-          - eslint
-          - eslint-config-prettier
-          - eslint-plugin-prettier
-          - eslint-plugin-tsdoc
-          - prettier
-          - typescript
-          - typescript-eslint
-        files: \.[jt]sx?$ # *.js, *.jsx, *.ts and *.tsx
-        types: [file]

.vscode/settings.json

@@ -5,7 +5,11 @@
     "README.md": "CONTRIBUTING.md, LICENSE, CHANGELOG.md, USAGE_DATA.md",
     "Containerfile": "Dockerfile"
   },
+  "editor.codeActionsOnSave": ["source.fixAll.eslint"],
   "editor.formatOnSave": true,
+  "[javascript]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
+  },
   "[typescript]": {
     "editor.defaultFormatter": "esbenp.prettier-vscode"
   },
@@ -32,5 +36,5 @@
   },
   "redhat.telemetry.enabled": false,
   "eslint.useESLintClass": true,
-  "eslint.packageManager": "yarn"
+  "eslint.experimental.useFlatConfig": true
 }

eslint.config.mjs

@@ -0,0 +1,63 @@
+// @ts-check
+// cspell: ignore tseslint
+import eslint from "@eslint/js";
+import tseslint from "typescript-eslint";
+import tsParser from "@typescript-eslint/parser";
+import ts from "@typescript-eslint/eslint-plugin";
+import tsdocPlugin from "eslint-plugin-tsdoc";
+import prettierRecommendedConfig from "eslint-plugin-prettier/recommended";
+import globals from "globals";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const __filename = fileURLToPath(import.meta.url); // get the resolved path to the file
+const __dirname = path.dirname(__filename); // get the name of the directory
+
+export default tseslint.config(
+  {
+    ignores: ["**/out/", ".yarn/*", "media/*"],
+  },
+  {
+    extends: [
+      eslint.configs.recommended,
+      ...tseslint.configs.recommended,
+      prettierRecommendedConfig,
+    ],
+    files: [
+      "**/*.{js,ts,tsx}",
+      "packages/**/*.{js,ts,tsx}",
+      "test/**/*.{js,ts,tsx}",
+    ],
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.mocha,
+        ...globals.commonjs,
+        ...globals.es2017,
+      },
+      parser: tsParser,
+      parserOptions: {
+        project: true,
+        tsconfigRootDir: __dirname,
+      },
+    },
+    plugins: {
+      "@typescript-eslint": ts,
+      tsdoc: tsdocPlugin,
+    },
+    rules: {
+      eqeqeq: ["error", "smart"],
+      "tsdoc/syntax": "error",
+      "@typescript-eslint/no-explicit-any": "error",
+      "@typescript-eslint/no-namespace": "error",
+      "@typescript-eslint/no-unused-vars": "error",
+      // Fix temporary off/warn made during eslint v9 upgrade:
+      "@typescript-eslint/no-non-null-assertion": "warn",
+      "no-empty-function": "warn",
+      "no-case-declarations": "off",
+      "no-constant-condition": "off",
+      "no-control-regex": "off",
+      "no-prototype-builtins": "off",
+    },
+  },
+);

package.json

@@ -753,6 +753,7 @@
   },
   "description": "Ansible language support",
   "devDependencies": {
+    "@eslint/js": "^9.0.0",
     "@types/chai": "^4.3.14",
     "@types/express": "^4.17.21",
     "@types/glob": "^8.1.0",
@@ -765,20 +766,23 @@
     "@types/uuid": "^9.0.8",
     "@types/vscode": "^1.85.0",
     "@types/vscode-webview": "^1.57.5",
-    "@typescript-eslint/eslint-plugin": "^7.5.0",
-    "@typescript-eslint/parser": "^7.5.0",
+    "@typescript-eslint/eslint-plugin": "^7.6.0",
+    "@typescript-eslint/parser": "^7.6.0",
     "@vscode/test-electron": "^2.3.9",
     "@vscode/vsce": "^2.24.0",
     "axios": "^1.6.8",
     "chai": "^4.4.1",
     "copyfiles": "^2.4.1",
     "depcheck": "^1.4.7",
-    "eslint": "^8.57.0",
+    "eslint": "^9.0.0",
     "eslint-config-prettier": "^9.1.0",
+    "eslint-formatter-gha": "^1.4.3",
+    "eslint-formatter-unix": "^8.40.0",
     "eslint-plugin-prettier": "^5.1.3",
     "eslint-plugin-tsdoc": "^0.2.17",
     "find-process": "^1.4.7",
     "glob": "^10.3.12",
+    "globals": "^15.0.0",
     "lodash": "^4.17.21",
     "mocha": "^10.4.0",
     "mochawesome": "^7.1.3",
@@ -791,7 +795,8 @@
     "sinon": "^17.0.1",
     "ts-loader": "^9.5.1",
     "ts-node": "^10.9.2",
-    "typescript": "^5.4.4",
+    "typescript": "^5.4.5",
+    "typescript-eslint": "^7.6.0",
     "vscode-extension-tester": "^8.0.2",
     "warnings-to-errors-webpack-plugin": "^2.3.0",
     "webpack": "^5.91.0",

packages/ansible-language-server/package.json

@@ -75,7 +75,7 @@
     "nyc": "^15.1.0",
     "rimraf": "^5.0.5",
     "ts-node": "^10.9.2",
-    "typescript": "^5.4.4"
+    "typescript": "^5.4.5"
   },
   "scripts": {
     "clean": "rimraf out/server && rimraf lib",

packages/ansible-language-server/src/services/ansibleLint.ts

@@ -79,8 +79,12 @@ export class AnsibleLint {
     const progressTracker = this.useProgressTracker
       ? await this.connection.window.createWorkDoneProgress()
       : {
-          begin: () => {}, // eslint-disable-line @typescript-eslint/no-empty-function
-          done: () => {}, // eslint-disable-line @typescript-eslint/no-empty-function
+          begin: () => {
+            // do nothing
+          },
+          done: () => {
+            // do nothing
+          },
         };
 
     progressTracker.begin("ansible-lint", undefined, "Processing files...");

packages/ansible-language-server/src/services/ansiblePlaybook.ts

@@ -48,8 +48,12 @@ export class AnsiblePlaybook {
     const progressTracker = this.useProgressTracker
       ? await this.connection.window.createWorkDoneProgress()
       : {
-          begin: () => {}, // eslint-disable-line @typescript-eslint/no-empty-function
-          done: () => {}, // eslint-disable-line @typescript-eslint/no-empty-function
+          begin: () => {
+            // do nothing
+          },
+          done: () => {
+            // do nothing
+          },
         };
 
     const workingDirectory = URI.parse(this.context.workspaceFolder.uri).path;

packages/ansible-language-server/src/utils/misc.ts

@@ -24,7 +24,7 @@ export function hasOwnProperty<X, Y extends PropertyKey>(
   obj: X,
   prop: Y,
 ): obj is X & Record<Y, unknown> {
-  return isObject(obj) && obj.hasOwnProperty(prop);
+  return isObject(obj) && Object.prototype.hasOwnProperty.call(obj, prop);
 }
 
 /**

packages/ansible-language-server/test/providers/validationProvider.test.ts

@@ -230,7 +230,7 @@ function testAnsibleSyntaxCheckNoHost(
       diagnosticReport: [
         {
           severity: 1,
-          // eslint-disable-next-line quotes
+
           message: "the field 'hosts' is required but was not set",
           range: {
             start: { line: 0, character: 0 } as Position,

packages/ansible-language-server/tools/settings-doc-generator.ts

@@ -65,13 +65,11 @@ const settingsReadmeFileUri = path.join(__dirname, "..", "docs", "settings.md");
 // Register a special function for handlebars to deal with comparison of stringed value of false
 // Else, normal #if treats it as boolean, even after converting booleans to strings in typescript
 Handlebars.registerHelper("ifEqualsFalse", function (arg1, options) {
-  // eslint-disable-next-line eqeqeq
   return arg1.toString() === "false" ? options.fn(this) : options.inverse(this);
 });
 
 // Register a special function for handlebars to deal with the checking of "list" as value type of settings
 Handlebars.registerHelper("ifValueArray", function (arg1, options) {
-  // eslint-disable-next-line eqeqeq
   return arg1.toString() === "list" ? options.fn(this) : options.inverse(this);
 });
 

packages/ansible-language-server/tsconfig.json

@@ -2,15 +2,15 @@
   "compilerOptions": {
     "alwaysStrict": true,
     "declaration": true,
+    "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
-    "lib": ["es2016"],
+    "lib": ["ES2020"],
     "module": "commonjs",
     "moduleResolution": "node",
     "outDir": "./out/server",
+    "skipLibCheck": true,
     "sourceMap": true,
-    "target": "es6",
-    "esModuleInterop": true,
-    "skipLibCheck": true
+    "target": "ES2020"
   },
   "exclude": ["node_modules", "out", "vscode-ansible"]
 }

src/extension.ts

@@ -621,7 +621,6 @@ async function resyncAnsibleInventory(): Promise<void> {
   }
 }
 
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
 async function getAuthToken(): Promise<void> {
   if (
     !(await workspace.getConfiguration("ansible").get("lightspeed.enabled"))

src/features/lightspeed/api.ts

@@ -84,14 +84,10 @@
       console.error("Ansible Lightspeed instance is not initialized.");
       return;
     }
-    try {
-      const response = await axiosInstance.get(urlPath, {
-        timeout: ANSIBLE_LIGHTSPEED_API_TIMEOUT,
-      });
-      return response.data;
-    } catch (error) {
-      throw error;
-    }
+    const response = await axiosInstance.get(urlPath, {
+      timeout: ANSIBLE_LIGHTSPEED_API_TIMEOUT,
+    });
+    return response.data;
   }
 
   public async completionRequest(

src/features/lightspeed/feedbackWebviewViewProvider.ts

@@ -16,7 +16,9 @@ export class LightspeedFeedbackWebviewViewProvider
 {
   public static readonly viewType = "lightspeed-feedback-webview";
 
-  constructor(private readonly _extensionUri: Uri) {}
+  constructor(private readonly _extensionUri: Uri) {
+    // do nothing
+  }
 
   public resolveWebviewView(
     webviewView: WebviewView,

src/features/lightspeed/inlineSuggestions.ts

@@ -876,9 +876,11 @@
   switch (action) {
     case UserAction.REJECTED: {
       console.log("[inline-suggestions] User rejected the inline suggestion.");
+      break;
     }
     case UserAction.IGNORED: {
       console.log("[inline-suggestions] User ignored the inline suggestion.");
+      break;
     }
     default: {
       console.log(