Check dirty workspace before switching to Review mode.

extensions/git-extended/src/common/models/repository.ts

@@ -348,6 +348,11 @@ export class Repository {
 			throw (result.exitCode);
 		}
 	}
+
+	async isDirty(): Promise<boolean> {
+		let result = await GitProcess.exec(['diff', '--no-ext-diff', '--exit-code'], this.path);
+		return result.exitCode !== 0;
+	}
 }
 
 export class GitHubRepository {

extensions/git-extended/src/review/reviewManager.ts

@@ -444,6 +444,12 @@ export class ReviewManager implements vscode.DecorationProvider {
 	}
 
 	async switch(pr: PullRequestModel): Promise<void> {
+		let isDirty = await this._repository.isDirty();
+		if (isDirty) {
+			vscode.window.showErrorMessage('Your local changes would be overwritten by checkout, please commit your changes or stash them before you switch branches');
+			return;
+		}
+
 		this.statusBarItem.text = '$(sync~spin) Switching to Review Mode';
 		this.statusBarItem.show();