git: confirmSync setting

extensions/git/package.json

@@ -397,6 +397,11 @@
           "description": "%config.enableLongCommitWarning%",
           "default": true
         },
+        "git.confirmSync": {
+          "type": "boolean",
+          "description": "%config.confirmSync%",
+          "default": true
+        },
         "git.countBadge": {
           "type": "string",
           "enum": [

extensions/git/package.nls.json

@@ -27,6 +27,7 @@
 	"config.autorefresh": "Whether auto refreshing is enabled",
 	"config.autofetch": "Whether auto fetching is enabled",
 	"config.enableLongCommitWarning": "Whether long commit messages should be warned about",
+	"config.confirmSync": "Confirm before synchronizing git repositories",
 	"config.countBadge": "Controls the git badge counter",
 	"config.checkoutType": "Controls what type of branches are listed"
 }
\ No newline at end of file

extensions/git/src/commands.ts

@@ -461,6 +461,28 @@ export class CommandCenter {
 	@CommandCenter.Command('git.sync')
 	@CommandCenter.CatchErrors
 	async sync(): Promise<void> {
+		const HEAD = this.model.HEAD;
+
+		if (!HEAD || !HEAD.upstream) {
+			return;
+		}
+
+		const config = workspace.getConfiguration('git');
+		const shouldPrompt = config.get<boolean>('confirmSync') === true;
+
+		if (shouldPrompt) {
+			const message = localize('sync is unpredictable', "This action will push and pull commits to and from '{0}'.", HEAD.upstream);
+			const yes = localize('ok', "OK");
+			const neverAgain = localize('never again', "OK, Never Show Again");
+			const pick = await window.showWarningMessage(message, { modal: true }, yes, neverAgain);
+
+			if (pick === neverAgain) {
+				await config.update('confirmSync', false, true);
+			} else if (pick !== yes) {
+				return;
+			}
+		}
+
 		await this.model.sync();
 	}