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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Copyright (C) 2019 Luxoft Sweden AB
** Copyright (C) 2018 Pelagicore AG
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtApplicationManager module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "logging.h"
#include "packagemanager.h"
#include "packagemanager_p.h"
#include "installationreport.h"
#include "package.h"
#include "exception.h"
#include "scopeutilities.h"
#include "deinstallationtask.h"
QT_BEGIN_NAMESPACE_AM
DeinstallationTask::DeinstallationTask(const QString &packageId, const QString &installationPath,
const QString &documentPath, bool forceDeinstallation,
bool keepDocuments, QObject *parent)
: AsynchronousTask(parent)
, m_installationPath(installationPath)
, m_documentPath(documentPath)
, m_keepDocuments(keepDocuments)
{
Q_UNUSED(forceDeinstallation) // this was used in the past to deal with SD-Card problems
m_packageId = packageId; // in base class
}
bool DeinstallationTask::cancel()
{
if (m_canBeCanceled)
m_canceled = true;
return m_canceled;
}
void DeinstallationTask::execute()
{
bool managerApproval = false;
try {
// we cannot rely on a check in PackageManager::removePackage()
// things might have changed in the meantime (e.g. multiple deinstallation request)
auto package = PackageManager::instance()->package(packageId());
if (!package) {
// the package has already been deinstalled - nothing more to do here
throw Exception(Error::NotInstalled, "Cannot remove package %1 because it is not installed")
.arg(m_packageId);
}
Q_ASSERT(package->info());
if (package->isBuiltIn() && !package->builtInHasRemovableUpdate())
throw Exception("There is no removable update for the built-in package %1").arg(packageId());
if (!package->info()->installationReport())
throw Exception("Cannot remove package %1 due to missing installation report").arg(packageId());
// we need to call those PackageManager methods in the correct thread
// this will also exclusively lock the package for us
QMetaObject::invokeMethod(PackageManager::instance(), [this, &managerApproval]()
{ managerApproval = PackageManager::instance()->startingPackageRemoval(packageId()); },
Qt::BlockingQueuedConnection);
if (!managerApproval)
throw Exception("PackageManager rejected the removal of package %1").arg(packageId());
// if any of the apps in the package were running before, we now need to wait until all of
// them have actually stopped
while (!m_canceled && !package->areAllApplicationsStoppedDueToBlock())
QThread::msleep(30);
// there's a small race condition here, but not doing a planned cancellation isn't harmful
m_canBeCanceled = false;
if (m_canceled)
throw Exception(Error::Canceled, "canceled");
ScopedRenamer docDirRename;
ScopedRenamer appDirRename;
if (!m_keepDocuments) {
if (!docDirRename.rename(QDir(m_documentPath).absoluteFilePath(packageId()),
ScopedRenamer::NameToNameMinus)) {
throw Exception(Error::IO, "could not rename %1 to %1-").arg(docDirRename.baseName());
}
}
if (!appDirRename.rename(QDir(m_installationPath).absoluteFilePath(packageId()),
ScopedRenamer::NameToNameMinus)) {
throw Exception(Error::IO, "could not rename %1 to %1-").arg(appDirRename.baseName());
}
docDirRename.take();
appDirRename.take();
// point of no return
for (ScopedRenamer *toDelete : { &docDirRename, &appDirRename }) {
if (toDelete->isRenamed()) {
if (!removeRecursiveHelper(toDelete->baseName() + qL1C('-')))
qCCritical(LogInstaller) << "ERROR: could not remove" << (toDelete->baseName() + qL1C('-'));
}
}
// we need to call those PackageManager methods in the correct thread
bool finishOk = false;
QMetaObject::invokeMethod(PackageManager::instance(), [this, &finishOk]()
{ finishOk = PackageManager::instance()->finishedPackageInstall(packageId()); },
Qt::BlockingQueuedConnection);
if (!finishOk)
qCWarning(LogInstaller) << "PackageManager did not approve deinstallation of " << m_packageId;
} catch (const Exception &e) {
// we need to call those ApplicationManager methods in the correct thread
if (managerApproval) {
bool cancelOk = false;
QMetaObject::invokeMethod(PackageManager::instance(), [this, &cancelOk]()
{ cancelOk = PackageManager::instance()->canceledPackageInstall(packageId()); },
Qt::BlockingQueuedConnection);
if (!cancelOk)
qCWarning(LogInstaller) << "PackageManager could not re-enable package" << m_packageId << "after a failed removal";
}
setError(e.errorCode(), e.errorString());
}
}
QT_END_NAMESPACE_AM
#include "moc_deinstallationtask.cpp"
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