Upgrade to TypeScript 6

- Adjust module and target settings to allow more flexibility for
  adapting ES Modules in the future
- Adjust source code to new behaviour from the above change
- Disable a few compiler errors for now

Fixes #4486

Signed-off-by: David Thompson <davthomp@redhat.com>

Author: datho7561

package-lock.json

@@ -1333,11 +1333,11 @@
             "default": false,
             "scope": "window"
           },
-		  "java.codeGeneration.generateCommentsInMarkdown": {
-		    "type": "boolean",
-		    "description": "Generate Javadoc comments in Markdown style (requires source compliance >= 23).",
-		    "default": false
-		  },
+          "java.codeGeneration.generateCommentsInMarkdown": {
+            "type": "boolean",
+            "description": "Generate Javadoc comments in Markdown style (requires source compliance >= 23).",
+            "default": false
+          },
           "java.codeGeneration.toString.template": {
             "type": "string",
             "description": "The template for generating the toString method.",
@@ -2175,7 +2175,7 @@
     "sinon": "^14.0.0",
     "tar": "^7.5.11",
     "ts-loader": "^9.4.2",
-    "typescript": "^4.6.4",
+    "typescript": "^6.0.3",
     "typescript-eslint": "^8.65.0",
     "webpack": "^5.105.0",
     "webpack-cli": "^7.2.1"
@@ -2200,9 +2200,6 @@
     "winston": "^3.2.1",
     "winston-daily-rotate-file": "^4.7.1"
   },
-  "overrides": {
-    "vscode-languageserver-protocol": "3.17.6-next.1"
-  },
   "segmentWriteKey": "Y7Y5Xk8dKEhVZHTmAkFZkqgdN4d7c4lt",
   "segmentWriteKeyDebug": "BflPll7uuKOCm3y0g7JpfXLVBVFBivDE"
 }

package.json

@@ -128,7 +128,7 @@ export function getUnicodeLocaleEnv(): { [key: string]: string } {
 	return env;
 }
 
-export function awaitServerConnection(port): Thenable<StreamInfo> {
+export function awaitServerConnection(port): Promise<StreamInfo> {
 	const addr = parseInt(port);
 	return new Promise((res, rej) => {
 		const server = net.createServer(stream => {

src/javaServerStarter.ts

@@ -1,5 +1,5 @@
 import { createLogger, format, transports } from 'winston';
-import * as DailyRotateFile from 'winston-daily-rotate-file';
+import DailyRotateFile from 'winston-daily-rotate-file';
 
 export function initializeLogFile(filename: string) {
 	logger.add(new DailyRotateFile({

src/log.ts

@@ -1,6 +1,6 @@
 'use strict';
 
-import * as expandHomeDir from 'expand-home-dir';
+import expandHomeDir from 'expand-home-dir';
 import * as fse from 'fs-extra';
 import { getRuntime, getSources, JAVAC_FILENAME, JAVA_FILENAME } from 'jdk-utils';
 import * as path from 'path';

src/requirements.ts

@@ -0,0 +1,2 @@
+/* silence warnings from typescript about not being able to analyse sideeffects of css imports */
+declare module "*.css" {}

src/webview/globals.d.ts

@@ -11,7 +11,7 @@
 // a possible error to the callback or null if none.
 
 import * as path from 'path';
-import * as Mocha from 'mocha';
+import Mocha from 'mocha';
 import { glob } from 'glob';
 
 export async function run(testsRoot: string): Promise<void> {

test/lightweight-mode-suite/index.ts

@@ -1,4 +1,4 @@
-import * as assert from 'assert';
+import assert from 'assert';
 import * as fs from 'fs';
 import * as path from 'path';
 import { env } from 'process';

test/standard-mode-suite/extension.test.ts

@@ -11,7 +11,7 @@
 // a possible error to the callback or null if none.
 
 import * as path from 'path';
-import * as Mocha from 'mocha';
+import Mocha from 'mocha';
 import { glob } from 'glob';
 
 export async function run(testsRoot: string): Promise<void> {

test/standard-mode-suite/index.ts

@@ -1,14 +1,23 @@
 {
 	"compilerOptions": {
-		"target": "es6",
-		"moduleResolution": "node",
+
+		"target": "es2020",
+		"module": "nodenext",
+		"moduleResolution": "bundler",
+
 		"outDir": "out",
 		"sourceMap": true,
 		"skipLibCheck": true,
+		"strictFunctionTypes": false,
+		"strictNullChecks": false,
+		"noImplicitAny": false,
+		"noImplicitThis": false,
+		"useUnknownInCatchVariables": false,
 		"plugins": [
 			{
 				"name": "eslint"
 			}
 		],
-	}
+		"types": ["node", "vscode", "mocha"]
+	},
 }