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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Brian McGillion
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/
#include "mercurialjobrunner.h"
#include "mercurialplugin.h"
#include "constants.h"
#include "mercurialsettings.h"
#include <vcsbase/vcsbaseoutputwindow.h>
#include <vcsbase/vcsbaseeditor.h>
#include <utils/synchronousprocess.h>
#include <QtCore/QProcess>
#include <QtCore/QProcessEnvironment>
#include <QtCore/QString>
#include <QtCore/QDebug>
using namespace Mercurial::Internal;
using namespace Mercurial;
HgTask::HgTask(const QString &repositoryRoot,
const QStringList &arguments,
bool emitRaw,
const QVariant &cookie) :
m_repositoryRoot(repositoryRoot),
arguments(arguments),
emitRaw(emitRaw),
m_cookie(cookie),
editor(0)
{
}
HgTask::HgTask(const QString &repositoryRoot,
const QStringList &arguments,
VCSBase::VCSBaseEditor *editor,
const QVariant &cookie) :
m_repositoryRoot(repositoryRoot),
arguments(arguments),
emitRaw(false),
m_cookie(cookie),
editor(editor)
{
}
void HgTask::emitSucceeded()
{
emit succeeded(m_cookie);
}
MercurialJobRunner::MercurialJobRunner() :
plugin(MercurialPlugin::instance()),
keepRunning(true)
{
VCSBase::VCSBaseOutputWindow *ow = VCSBase::VCSBaseOutputWindow::instance();
connect(this, SIGNAL(error(QString)), ow, SLOT(appendError(QString)), Qt::QueuedConnection);
connect(this, SIGNAL(commandStarted(QString)), ow, SLOT(appendCommand(QString)), Qt::QueuedConnection);
}
MercurialJobRunner::~MercurialJobRunner()
{
stop();
}
void MercurialJobRunner::stop()
{
mutex.lock();
keepRunning = false;
//Create a dummy task to break the cycle
QSharedPointer<HgTask> job(0);
jobs.enqueue(job);
waiter.wakeAll();
mutex.unlock();
wait();
}
void MercurialJobRunner::restart()
{
stop();
mutex.lock();
keepRunning = true;
mutex.unlock();
start();
}
void MercurialJobRunner::getSettings()
{
const MercurialSettings &settings = MercurialPlugin::instance()->settings();
binary = settings.binary();
m_timeoutMS = settings.timeoutMilliSeconds();
standardArguments = settings.standardArguments();
}
void MercurialJobRunner::enqueueJob(const QSharedPointer<HgTask> &job)
{
mutex.lock();
jobs.enqueue(job);
waiter.wakeAll();
mutex.unlock();
}
void MercurialJobRunner::run()
{
getSettings();
forever {
mutex.lock();
while (jobs.count() == 0)
waiter.wait(&mutex);
if (!keepRunning) {
jobs.clear();
mutex.unlock();
return;
}
QSharedPointer<HgTask> job = jobs.dequeue();
mutex.unlock();
task(job);
}
}
QString MercurialJobRunner::msgExecute(const QString &binary, const QStringList &args)
{
return tr("Executing: %1 %2\n").arg(binary, args.join(QString(QLatin1Char(' '))));
}
QString MercurialJobRunner::msgStartFailed(const QString &binary, const QString &why)
{
return tr("Unable to start mercurial process '%1': %2").arg(binary, why);
}
QString MercurialJobRunner::msgTimeout(int timeoutSeconds)
{
return tr("Timed out after %1s waiting for mercurial process to finish.").arg(timeoutSeconds);
}
void MercurialJobRunner::task(const QSharedPointer<HgTask> &job)
{
HgTask *taskData = job.data();
VCSBase::VCSBaseOutputWindow *outputWindow = VCSBase::VCSBaseOutputWindow::instance();
if (taskData->shouldEmit()) {
//Call the job's signal so the Initator of the job can process the data
//Because the QSharedPointer that holds the HgTask will go out of scope and hence be deleted
//we have to block and wait until the signal is delivered
connect(this, SIGNAL(output(QByteArray)), taskData, SIGNAL(rawData(QByteArray)),
Qt::BlockingQueuedConnection);
} else if (taskData->displayEditor()) {
//An editor has been created to display the data so send it there
connect(this, SIGNAL(output(QByteArray)),
taskData->displayEditor(), SLOT(setPlainTextData(QByteArray)),
Qt::QueuedConnection);
} else {
//Just output the data to the Mercurial output window
connect(this, SIGNAL(output(QByteArray)), outputWindow, SLOT(appendData(QByteArray)),
Qt::QueuedConnection);
}
const QStringList args = standardArguments + taskData->args();
emit commandStarted(msgExecute(binary, args));
//infom the user of what we are going to try and perform
if (Constants::debug)
qDebug() << Q_FUNC_INFO << "Repository root is " << taskData->repositoryRoot();
QProcess hgProcess;
if (!taskData->repositoryRoot().isEmpty())
hgProcess.setWorkingDirectory(taskData->repositoryRoot());
hgProcess.start(binary, args);
if (!hgProcess.waitForStarted()) {
emit error(msgStartFailed(binary, hgProcess.errorString()));
return;
}
hgProcess.closeWriteChannel();
QByteArray stdOutput;
QByteArray stdErr;
if (!Utils::SynchronousProcess::readDataFromProcess(hgProcess, m_timeoutMS, &stdOutput, &stdErr)) {
Utils::SynchronousProcess::stopProcess(hgProcess);
emit error(msgTimeout(m_timeoutMS / 1000));
return;
}
if (hgProcess.exitStatus() == QProcess::NormalExit && hgProcess.exitCode() == 0) {
/*
* sometimes success means output is actually on error channel (stderr)
* e.g. "hg revert" outputs "no changes needed to 'file'" on stderr if file has not changed
* from revision specified
*/
if (stdOutput.isEmpty())
stdOutput = stdErr;
emit output(stdOutput);
taskData->emitSucceeded();
} else {
emit error(QString::fromLocal8Bit(stdErr));
}
hgProcess.close();
//the signal connection is to last only for the duration of a job/task. next time a new
//output signal connection must be made
disconnect(this, SIGNAL(output(QByteArray)), 0, 0);
}
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