ClearMountsJob: umount all partitions before making changes to a device.

Fixes #169

src/modules/partition/CMakeLists.txt

@@ -42,6 +42,7 @@ calamares_add_plugin( partition
         gui/PartitionViewStep.cpp
         gui/PrettyRadioButton.cpp
         jobs/CheckFileSystemJob.cpp
+        jobs/ClearMountsJob.cpp
         jobs/CreatePartitionJob.cpp
         jobs/CreatePartitionTableJob.cpp
         jobs/DeletePartitionJob.cpp

src/modules/partition/jobs/ClearMountsJob.cpp

@@ -0,0 +1,74 @@
+/* === This file is part of Calamares - <http://github.com/calamares> ===
+ *
+ *   Copyright 2014, Teo Mrnjavac <teo@kde.org>
+ *
+ *   Calamares 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.
+ *
+ *   Calamares 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 Calamares. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ClearMountsJob.h"
+
+#include <core/device.h>
+#include <core/partition.h>
+#include <core/PartitionInfo.h>
+#include <core/PartitionIterator.h>
+#include <util/report.h>
+
+#include <QStringList>
+
+
+ClearMountsJob::ClearMountsJob( Device* device )
+    : Calamares::Job()
+    , m_device( device )
+{
+}
+
+
+QString
+ClearMountsJob::prettyName() const
+{
+    return tr( "Clear mounts for partitioning operations on %1" )
+            .arg( m_device->deviceNode() );
+}
+
+
+Calamares::JobResult
+ClearMountsJob::exec()
+{
+    QStringList goodNews;
+    for ( auto it = PartitionIterator::begin( m_device );
+          it != PartitionIterator::end( m_device ); ++it )
+    {
+        if ( (*it)->isMounted() )
+        {
+            if ( (*it)->canUnmount() )
+            {
+                Report report( 0, QString() );
+                (*it)->unmount( report );
+                goodNews.append( report.toText() );
+            }
+            else
+            {
+                return Calamares::JobResult::error( tr( "Cannot umount partition %1" )
+                                                        .arg( (*it)->deviceNode() ),
+                                                    tr( "Cannot proceed with partitioning operations "
+                                                        "because some partitions are still mounted." ) );
+            }
+        }
+    }
+    Calamares::JobResult ok = Calamares::JobResult::ok();
+    ok.setMessage( tr( "Cleared all mounts for %1" )
+                        .arg( m_device->deviceNode() ) );
+    ok.setDetails( goodNews.join( "\n" ) );
+    return ok;
+}

src/modules/partition/jobs/ClearMountsJob.h

@@ -0,0 +1,41 @@
+/* === This file is part of Calamares - <http://github.com/calamares> ===
+ *
+ *   Copyright 2014, Teo Mrnjavac <teo@kde.org>
+ *
+ *   Calamares 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.
+ *
+ *   Calamares 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 Calamares. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CLEARMOUNTSJOB_H
+#define CLEARMOUNTSJOB_H
+
+#include <Job.h>
+
+class Device;
+
+/**
+ * This job tries to free all mounts for the given device, so partitioning
+ * operations can proceed.
+ */
+class ClearMountsJob : public Calamares::Job
+{
+    Q_OBJECT
+public:
+    explicit ClearMountsJob( Device* device );
+    QString prettyName() const override;
+    Calamares::JobResult exec() override;
+private:
+    Device* m_device;
+};
+
+#endif // CLEARMOUNTSJOB_H