Fixes regression causing copy message to clipboard to fail

Author: eamodio

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased]
+
+### Fixed
+
+- Fixes an issue where the _Copy Commit Message to Clipboard_ command fails (and probably others too) — a regression caused by the attempted fix for [#568](https://github.com/eamodio/vscode-gitlens/issues/565)
+
 ## [9.0.2] - 2018-12-05
 
 ### Added

src/git/gitUri.ts

@@ -328,8 +328,9 @@ export class GitUri extends ((Uri as any) as UriEx) {
         if (repoPath === undefined) return normalizedFileName;
 
         const normalizedRepoPath = Strings.normalizePath(repoPath);
+        if (normalizedFileName == null || normalizedFileName.length === 0) return normalizedRepoPath;
 
-        if (!normalizedFileName || normalizedFileName.startsWith(normalizedRepoPath)) return normalizedFileName;
+        if (normalizedFileName.startsWith(normalizedRepoPath)) return normalizedFileName;
         return Strings.normalizePath(paths.join(normalizedRepoPath, normalizedFileName));
     }