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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing
**
** This file is part of the Qt Build Suite.
**
** 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 http://www.qt.io/terms-conditions. For further information
** use the contact form at http://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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "cycledetector.h"
#include "artifact.h"
#include "buildgraph.h"
#include "projectbuilddata.h"
#include "rulenode.h"
#include <language/language.h>
#include <logging/translator.h>
#include <tools/error.h>
namespace qbs {
namespace Internal {
CycleDetector::CycleDetector(const Logger &logger)
: m_parent(0), m_logger(logger)
{
}
void CycleDetector::visitProject(const TopLevelProjectConstPtr &project)
{
const QString description = QString::fromLocal8Bit("Cycle detection for project '%1'")
.arg(project->name);
TimedActivityLogger timeLogger(m_logger, description, QLatin1String("[BG] "), LoggerTrace);
project->accept(this);
}
void CycleDetector::visitProduct(const ResolvedProductConstPtr &product)
{
product->accept(this);
}
bool CycleDetector::visit(Artifact *artifact)
{
return visitNode(artifact);
}
bool CycleDetector::visit(RuleNode *ruleNode)
{
return visitNode(ruleNode);
}
bool CycleDetector::visitNode(BuildGraphNode *node)
{
if (Q_UNLIKELY(m_nodesInCurrentPath.contains(node))) {
ErrorInfo error(Tr::tr("Cycle in build graph detected."));
foreach (const BuildGraphNode * const n, cycle(node))
error.append(n->toString());
throw error;
}
if (m_allNodes.contains(node))
return false;
m_nodesInCurrentPath += node;
m_parent = node;
foreach (BuildGraphNode * const child, node->children)
child->accept(this);
m_nodesInCurrentPath -= node;
m_allNodes += node;
return false;
}
QList<BuildGraphNode *> CycleDetector::cycle(BuildGraphNode *doubleEntry)
{
QList<BuildGraphNode *> path;
findPath(doubleEntry, m_parent, path);
return path << doubleEntry;
}
} // namespace Internal
} // namespace qbs
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