Move patch command out of VcsPlugin

It will be needed soon inside DiffEditor plugin.
Move "Patch command" setting out of Version Control | General
into Environment | General | System.

Introduce PatchTool class, which hold the patch command
setting and a method for applying patches (runPatch() - moved
from VcsBasePlugin).

Change-Id: I9de94358ccd5c6e31ac2beefc27305c5111d67bb
Reviewed-by: Jarek Kobus <jaroslaw.kobus@digia.com>

1 files changed, 134 insertions, 0 deletions

diff --git a/src/plugins/coreplugin/patchtool.cpp b/src/plugins/coreplugin/patchtool.cpp
new file mode 100644
index 0000000000..90c38d7102
--- /dev/null
+++ b/src/plugins/coreplugin/patchtool.cpp
@@ -0,0 +1,134 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 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.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "patchtool.h"
+#include "messagemanager.h"
+#include "icore.h"
+#include <utils/synchronousprocess.h>
+
+#include <QProcess>
+#include <QDir>
+#include <QApplication>
+
+static const char settingsGroupC[] = "General";
+static const char legacySettingsGroupC[] = "VCS";
+static const char patchCommandKeyC[] = "PatchCommand";
+static const char patchCommandDefaultC[] = "patch";
+
+namespace Core {
+
+static QString readLegacyCommand()
+{
+    QSettings *s = Core::ICore::settings();
+
+    s->beginGroup(QLatin1String(legacySettingsGroupC));
+    const bool legacyExists = s->contains(QLatin1String(patchCommandKeyC));
+    const QString legacyCommand = s->value(QLatin1String(patchCommandKeyC), QLatin1String(patchCommandDefaultC)).toString();
+    if (legacyExists)
+        s->remove(QLatin1String(patchCommandKeyC));
+    s->endGroup();
+
+    if (legacyExists && legacyCommand != QLatin1String(patchCommandDefaultC))
+        PatchTool::setPatchCommand(legacyCommand);
+
+    return legacyCommand;
+}
+
+QString PatchTool::patchCommand()
+{
+    QSettings *s = Core::ICore::settings();
+
+    const QString defaultCommand = readLegacyCommand(); // replace it with QLatin1String(patchCommandDefaultC) when dropping legacy stuff
+
+    s->beginGroup(QLatin1String(settingsGroupC));
+    const QString command = s->value(QLatin1String(patchCommandKeyC), defaultCommand).toString();
+    s->endGroup();
+
+    return command;
+}
+
+void PatchTool::setPatchCommand(const QString &newCommand)
+{
+    QSettings *s = Core::ICore::settings();
+    s->beginGroup(QLatin1String(settingsGroupC));
+    s->setValue(QLatin1String(patchCommandKeyC), newCommand);
+    s->endGroup();
+}
+
+bool PatchTool::runPatch(const QByteArray &input, const QString &workingDirectory,
+                         int strip, bool reverse)
+{
+    const QString patch = patchCommand();
+    if (patch.isEmpty()) {
+        MessageManager::write(QApplication::translate("Core::PatchTool", "There is no patch-command configured in the general \"Environment\" settings."));
+        return false;
+    }
+
+    QProcess patchProcess;
+    if (!workingDirectory.isEmpty())
+        patchProcess.setWorkingDirectory(workingDirectory);
+    QStringList args(QLatin1String("-p") + QString::number(strip));
+    if (reverse)
+        args << QLatin1String("-R");
+    MessageManager::write(QApplication::translate("Core::PatchTool", "Executing in %1: %2 %3").
+                          arg(QDir::toNativeSeparators(workingDirectory),
+                              QDir::toNativeSeparators(patch), args.join(QLatin1String(" "))));
+    patchProcess.start(patch, args);
+    if (!patchProcess.waitForStarted()) {
+        MessageManager::write(QApplication::translate("Core::PatchTool", "Unable to launch \"%1\": %2").arg(patch, patchProcess.errorString()));
+        return false;
+    }
+    patchProcess.write(input);
+    patchProcess.closeWriteChannel();
+    QByteArray stdOut;
+    QByteArray stdErr;
+    if (!Utils::SynchronousProcess::readDataFromProcess(patchProcess, 30000, &stdOut, &stdErr, true)) {
+        Utils::SynchronousProcess::stopProcess(patchProcess);
+        MessageManager::write(QApplication::translate("Core::PatchTool", "A timeout occurred running \"%1\"").arg(patch));
+        return false;
+
+    }
+    if (!stdOut.isEmpty())
+        MessageManager::write(QString::fromLocal8Bit(stdOut));
+    if (!stdErr.isEmpty())
+        MessageManager::write(QString::fromLocal8Bit(stdErr));
+
+    if (patchProcess.exitStatus() != QProcess::NormalExit) {
+        MessageManager::write(QApplication::translate("Core::PatchTool", "\"%1\" crashed.").arg(patch));
+        return false;
+    }
+    if (patchProcess.exitCode() != 0) {
+        MessageManager::write(QApplication::translate("Core::PatchTool", "\"%1\" failed (exit code %2).").arg(patch).arg(patchProcess.exitCode()));
+        return false;
+    }
+    return true;
+}
+
+
+} // namespace Core