Adds Show Branch History command

Renames Show Repository History to Show Current Branch History
Doesn't migrate data yet

src/commands/showQuickCurrentBranchHistory.ts

@@ -0,0 +1,29 @@
+'use strict';
+import { commands, TextEditor, Uri, window } from 'vscode';
+import { ActiveEditorCachedCommand, Commands } from '../commands';
+import { GitService } from '../gitService';
+import { Logger } from '../logger';
+import { CommandQuickPickItem } from '../quickPicks';
+
+export class ShowQuickCurrentBranchHistoryCommand extends ActiveEditorCachedCommand {
+
+    constructor(private git: GitService) {
+        super(Commands.ShowQuickCurrentBranchHistory);
+    }
+
+    async execute(editor: TextEditor, uri?: Uri, goBackCommand?: CommandQuickPickItem) {
+        if (!(uri instanceof Uri)) {
+            uri = editor && editor.document && editor.document.uri;
+        }
+
+        try {
+            const branch = (await this.git.getBranch(this.git.repoPath)).name;
+
+            return commands.executeCommand(Commands.ShowQuickBranchHistory, uri, branch, undefined, goBackCommand);
+        }
+        catch (ex) {
+            Logger.error('[GitLens.ShowQuickCurrentBranchHistoryCommand]', ex);
+            return window.showErrorMessage(`Unable to show branch history. See output channel for more details`);
+        }
+    }
+}