Fixes openEditor with GitUris

CHANGELOG.md

@@ -5,6 +5,8 @@ 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 issue where `Open File` command failed for in many instances (for GitUri resources)
 
 ## [5.6.1] - 2017-10-11
 ### Fixed

src/commands/common.ts

@@ -1,7 +1,7 @@
 'use strict';
 import { commands, Disposable, SourceControlResourceGroup, SourceControlResourceState, TextDocumentShowOptions, TextEditor, TextEditorEdit, Uri, window, workspace } from 'vscode';
 import { ExplorerNode } from '../views/explorerNodes';
-import { GitBranch, GitCommit, GitRemote } from '../gitService';
+import { GitBranch, GitCommit, GitRemote, GitUri } from '../gitService';
 import { Logger } from '../logger';
 import { Telemetry } from '../telemetry';
 
@@ -277,6 +277,10 @@ export async function openEditor(uri: Uri, options?: TextDocumentShowOptions): P
             viewColumn: (window.activeTextEditor && window.activeTextEditor.viewColumn) || 1
         };
 
+        if (uri instanceof GitUri) {
+            uri = Uri.file(uri.fsPath);
+        }
+
         const document = await workspace.openTextDocument(uri);
         return window.showTextDocument(document, { ...defaults, ...(options || {}) });
     }