Merge from vscode merge-base (#22769)

* Merge from vscode merge-base

* Turn off basic checks

* Enable compilation, unit, and integration tests

extensions/git/src/git-editor-main.ts

@@ -0,0 +1,21 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+import { IPCClient } from './ipc/ipcClient';
+
+function fatal(err: any): void {
+	console.error(err);
+	process.exit(1);
+}
+
+function main(argv: string[]): void {
+	const ipcClient = new IPCClient('git-editor');
+	const commitMessagePath = argv[argv.length - 1];
+
+	ipcClient.call({ commitMessagePath }).then(() => {
+		setTimeout(() => process.exit(0), 0);
+	}).catch(err => fatal(err));
+}
+
+main(process.argv);