Git: Add fetch to branch view

Allow fetching from a single or from all remotes.

Change-Id: I2e0e69a092c3a8bb58f65af877c9af8bb59c92d9
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: André Hartmann <aha_1980@gmx.de>

src/plugins/git/branchmodel.cpp

@@ -647,6 +647,19 @@ void BranchModel::setOldBranchesIncluded(bool value)
     m_oldBranchesIncluded = value;
 }
 
+Utils::optional<QString> BranchModel::remoteName(const QModelIndex &idx) const
+{
+    const BranchNode *remotesNode = m_rootNode->children.at(RemoteBranches);
+    const BranchNode *node = indexToNode(idx);
+    if (!node)
+        return Utils::nullopt;
+    if (node == remotesNode)
+        return QString();
+    if (node->parent == remotesNode)
+        return node->name;
+    return Utils::nullopt;
+}
+
 void BranchModel::parseOutputLine(const QString &line)
 {
     if (line.size() < 3)

src/plugins/git/branchmodel.h

@@ -25,6 +25,8 @@
 
 #pragma once
 
+#include <utils/optional.h>
+
 #include <QAbstractListModel>
 #include <QVariant>
 
@@ -81,6 +83,7 @@ public:
     QModelIndex addBranch(const QString &name, bool track, const QModelIndex &trackedBranch);
     void setRemoteTracking(const QModelIndex &trackingIndex);
     void setOldBranchesIncluded(bool value);
+    Utils::optional<QString> remoteName(const QModelIndex &idx) const;
 
 private:
     void parseOutputLine(const QString &line);

src/plugins/git/branchview.cpp

@@ -167,6 +167,12 @@ void BranchView::slotCustomContextMenu(const QPoint &point)
 
     QMenu contextMenu;
     contextMenu.addAction(tr("Add..."), this, &BranchView::add);
+    const Utils::optional<QString> remote = m_model->remoteName(index);
+    if (remote.has_value()) {
+        contextMenu.addAction(tr("Fetch"), this, [this, &remote]() {
+            GitPlugin::client()->fetch(m_repository, *remote);
+        });
+    }
     if (hasActions) {
         if (!currentSelected && (isLocal || isTag))
             contextMenu.addAction(tr("Remove"), this, &BranchView::remove);