Git: Report current branch

Change-Id: Ied5ac2749b111d3b646080311ac6b52b3f86dc33
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/git/gitversioncontrol.cpp

@@ -140,7 +140,12 @@ QString GitVersionControl::vcsGetRepositoryURL(const QString &directory)
     return m_client->vcsGetRepositoryURL(directory);
 }
 
-/* Snapshots are implement using stashes, relying on stash messages for
+QString GitVersionControl::vcsTopic(const QString &directory)
+{
+    return m_client->synchronousBranch(directory);
+}
+
+/* Snapshots are implemented using stashes, relying on stash messages for
  * naming as the actual stash names (stash{n}) are rotated as one adds stashes.
  * Note that the snapshot interface does not care whether we have an unmodified
  * repository state, in which case git refuses to stash.

src/plugins/git/gitversioncontrol.h

@@ -64,6 +64,7 @@ public:
     bool vcsRemoveSnapshot(const QString &topLevel, const QString &name);
 
     bool vcsAnnotate(const QString &file, int line);
+    QString vcsTopic(const QString &directory);
 
     void emitFilesChanged(const QStringList &);
     void emitRepositoryChanged(const QString &);