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/****************************************************************************
**
** Copyright (C) 2019 Luxoft Sweden AB
** Copyright (C) 2018 Pelagicore AG
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Luxoft Application Manager.
**
** $QT_BEGIN_LICENSE:LGPL-QTAS$
** Commercial License Usage
** Licensees holding valid commercial Qt Automotive Suite 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 Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or 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.GPL2 and 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-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
** SPDX-License-Identifier: LGPL-3.0
**
****************************************************************************/
#include "logging.h"
#include "applicationinstaller.h"
#include "applicationinstaller_p.h"
#include "applicationmanager.h"
#include "installationreport.h"
#include "applicationinfo.h"
#include "exception.h"
#include "scopeutilities.h"
#include "deinstallationtask.h"
QT_BEGIN_NAMESPACE_AM
DeinstallationTask::DeinstallationTask(const QString &appId, const InstallationLocation &installationLocation,
bool forceDeinstallation, bool keepDocuments, QObject *parent)
: AsynchronousTask(parent)
, m_installationLocation(installationLocation)
, m_forceDeinstallation(forceDeinstallation)
, m_keepDocuments(keepDocuments)
{
m_applicationId = appId; // 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 ApplicationInstaller::removePackage()
// things might have changed in the meantime (e.g. multiple deinstallation request)
AbstractApplication *a = ApplicationManager::instance()->fromId(m_applicationId);
if (!a) {
// 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_applicationId);
}
ApplicationInfo *app = a->nonAliasedInfo();
Q_ASSERT(app);
Q_ASSERT(app->installationReport());
Q_ASSERT(app->installationReport()->installationLocationId() == m_installationLocation.id());
Q_ASSERT(m_installationLocation.isValid());
// we need to call those ApplicationManager methods in the correct thread
// this will also exclusively lock the application for us
QMetaObject::invokeMethod(ApplicationManager::instance(),
"startingApplicationRemoval",
Qt::BlockingQueuedConnection,
Q_RETURN_ARG(bool, managerApproval),
Q_ARG(QString, m_applicationId));
if (!managerApproval)
throw Exception("ApplicationManager rejected the removal of app %1").arg(m_applicationId);
// if the app was running before, we now need to wait until is has actually stopped
while (!m_canceled &&
(ApplicationManager::instance()->applicationRunState(m_applicationId) != Am::NotRunning)) {
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;
ScopedRenamer appImageRename;
ScopedRenamer manifestRename;
if (!m_keepDocuments) {
if (!docDirRename.rename(QDir(m_installationLocation.documentPath()).absoluteFilePath(m_applicationId),
ScopedRenamer::NameToNameMinus)) {
throw Exception(Error::IO, "could not rename %1 to %1-").arg(docDirRename.baseName());
}
}
if (m_installationLocation.isRemovable()) {
QString imageFile = QDir(m_installationLocation.installationPath()).absoluteFilePath(m_applicationId + qSL(".appimg"));
if (m_installationLocation.isMounted() && QFile::exists(imageFile)) {
// the correct medium is currently mounted
if (!appImageRename.rename(imageFile, ScopedRenamer::NameToNameMinus)
&& !m_forceDeinstallation) {
throw Exception(Error::IO, "could not rename %1 to %1-").arg(appImageRename.baseName());
}
} else {
// either no medium or the wrong one are mounted at the moment
if (!m_forceDeinstallation)
throw Exception(Error::MediumNotAvailable, "cannot delete application %1 without the removable medium it was installed on").arg(m_applicationId);
}
} else {
if (!appDirRename.rename(QDir(m_installationLocation.installationPath()).absoluteFilePath(m_applicationId),
ScopedRenamer::NameToNameMinus)) {
throw Exception(Error::IO, "could not rename %1 to %1-").arg(appDirRename.baseName());
}
}
if (!manifestRename.rename(ApplicationInstaller::instance()->manifestDirectory()->absoluteFilePath(m_applicationId),
ScopedRenamer::NameToNameMinus)) {
throw Exception(Error::IO, "could not rename %1 to %1-").arg(manifestRename.baseName());
}
manifestRename.take();
docDirRename.take();
appDirRename.take();
appImageRename.take();
// point of no return
for (ScopedRenamer *toDelete : { &manifestRename, &docDirRename, &appDirRename, &appImageRename}) {
if (toDelete->isRenamed()) {
if (!removeRecursiveHelper(toDelete->baseName() + qL1C('-')))
qCCritical(LogInstaller) << "ERROR: could not remove" << (toDelete->baseName() + qL1C('-'));
}
}
// we need to call those ApplicationManager methods in the correct thread
bool finishOk = false;
QMetaObject::invokeMethod(ApplicationManager::instance(),
"finishedApplicationInstall",
Qt::BlockingQueuedConnection,
Q_RETURN_ARG(bool, finishOk),
Q_ARG(QString, m_applicationId));
if (!finishOk)
qCWarning(LogInstaller) << "ApplicationManager did not approve deinstallation of " << m_applicationId;
} catch (const Exception &e) {
// we need to call those ApplicationManager methods in the correct thread
if (managerApproval) {
bool cancelOk = false;
QMetaObject::invokeMethod(ApplicationManager::instance(),
"canceledApplicationInstall",
Qt::BlockingQueuedConnection,
Q_RETURN_ARG(bool, cancelOk),
Q_ARG(QString, m_applicationId));
if (!cancelOk)
qCWarning(LogInstaller) << "ApplicationManager could not re-enable app" << m_applicationId << "after a failed removal";
}
setError(e.errorCode(), e.errorString());
}
}
QT_END_NAMESPACE_AM
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