VCS: Add a way to filter out files/directories that belong to a VCS

Change-Id: I4dcbe6242cfe327e3b72d3dd550309be45e326a9
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/mercurial/mercurialclient.cpp

@@ -33,6 +33,7 @@
 #include <vcsbase/vcsbaseeditorparameterwidget.h>
 #include <utils/synchronousprocess.h>
 #include <utils/fileutils.h>
+#include <utils/hostosinfo.h>
 #include <utils/qtcassert.h>
 
 #include <QDateTime>
@@ -333,6 +334,12 @@ void MercurialClient::revertAll(const QString &workingDir, const QString &revisi
                              QStringList(extraOptions) << QLatin1String("--all"));
 }
 
+bool MercurialClient::isVcsDirectory(const FileName &fileName) const
+{
+    return fileName.toFileInfo().isDir()
+            && fileName.fileName().compare(Constants::MERCURIALREPO, HostOsInfo::fileNameCaseSensitivity());
+}
+
 void MercurialClient::view(const QString &source, const QString &id,
                            const QStringList &extraOptions)
 {