From 41afff235b60b82afcfe271e1663f15f0ec5e121 Mon Sep 17 00:00:00 2001
From: Matt Bierner <matb@microsoft.com>
Date: Mon, 29 Jan 2018 10:46:37 -0800
Subject: [PATCH] Restore automatically putting TS Server in debug more if
 TSS_DEBUG is set

Fixes https://github.com/Microsoft/TypeScript/issues/21454
---
 .../typescript/src/typescriptServiceClient.ts     | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/extensions/typescript/src/typescriptServiceClient.ts b/extensions/typescript/src/typescriptServiceClient.ts
index a36818b3905..595d56d117f 100644
--- a/extensions/typescript/src/typescriptServiceClient.ts
+++ b/extensions/typescript/src/typescriptServiceClient.ts
@@ -354,8 +354,9 @@ export default class TypeScriptServiceClient implements ITypeScriptServiceClient
 		return this.servicePromise = new Promise<ForkedTsServerProcess>(async (resolve, reject) => {
 			try {
 				const tsServerForkArgs = await this.getTsServerArgs(currentVersion);
+				const debugPort = this.getDebugPort();
 				const tsServerForkOptions: electron.IForkOptions = {
-					execArgv: [] // [`--debug-brk=5859`]
+					execArgv: debugPort ? [`--inspect=${debugPort}`] : [] // [`--debug-brk=5859`]
 				};
 				electron.fork(currentVersion.tsServerPath, tsServerForkArgs, tsServerForkOptions, this.logger, (err: any, childProcess: cp.ChildProcess | null) => {
 					if (err || !childProcess) {
@@ -942,6 +943,18 @@ export default class TypeScriptServiceClient implements ITypeScriptServiceClient
 		return args;
 	}
 
+
+	private getDebugPort(): number | undefined {
+		const value = process.env['TSS_DEBUG'];
+		if (value) {
+			const port = parseInt(value);
+			if (!isNaN(port)) {
+				return port;
+			}
+		}
+		return undefined;
+	}
+
 	private resetClientVersion() {
 		this._apiVersion = API.defaultVersion;
 		this._tsserverVersion = undefined;