ADDED: Git integration support

Adds support for project-based git integration, branch support, commit,
revert and updates

Fixes https://gitlab.com/kicad/code/kicad/issues/10441

common/git/git_clone_handler.cpp

@@ -0,0 +1,82 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2023 KiCad Developers, see AUTHORS.TXT for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/gpl-3.0.html
+ * or you may search the http://www.gnu.org website for the version 3 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include "git_clone_handler.h"
+
+#include <git/kicad_git_common.h>
+
+#include <git2.h>
+#include <wx/filename.h>
+
+GIT_CLONE_HANDLER::GIT_CLONE_HANDLER() :  KIGIT_COMMON( nullptr )
+{}
+
+GIT_CLONE_HANDLER::~GIT_CLONE_HANDLER()
+{
+    if( m_repo )
+        git_repository_free( m_repo );
+}
+
+
+bool GIT_CLONE_HANDLER::PerformClone()
+{
+    wxFileName clonePath( m_clonePath );
+
+    if( !clonePath.DirExists() )
+    {
+        if( !clonePath.Mkdir( wxS_DIR_DEFAULT, wxPATH_MKDIR_FULL ) )
+        {
+            AddErrorString( wxString::Format( _( "Could not create directory '%s'" ), m_clonePath ) );
+            return false;
+        }
+    }
+
+    git_clone_options cloneOptions = GIT_CLONE_OPTIONS_INIT;
+    cloneOptions.checkout_opts.checkout_strategy = GIT_CHECKOUT_SAFE;
+    cloneOptions.checkout_opts.progress_cb = clone_progress_cb;
+    cloneOptions.checkout_opts.progress_payload = this;
+    cloneOptions.fetch_opts.callbacks.transfer_progress = transfer_progress_cb;
+    cloneOptions.fetch_opts.callbacks.credentials = credentials_cb;
+    cloneOptions.fetch_opts.callbacks.payload = this;
+
+    m_testedTypes = 0;
+
+    if( git_clone( &m_repo, m_URL.ToStdString().c_str(), m_clonePath.ToStdString().c_str(), &cloneOptions ) != 0 )
+    {
+        AddErrorString( wxString::Format( _( "Could not clone repository '%s'" ), m_URL ) );
+        return false;
+    }
+
+    if( m_progressReporter )
+        m_progressReporter->Hide();
+
+    m_previousProgress = 0;
+
+    return true;
+}
+
+
+void GIT_CLONE_HANDLER::UpdateProgress( int aCurrent, int aTotal, const wxString& aMessage )
+{
+    ReportProgress( aCurrent, aTotal, aMessage );
+}