Introduce the concept of a "device process".

Provide a QProcess-like abstraction that can be used
to implement processes running locally or on a remote
device. Objects of a concrete class implementing the functionality
are created by IDevice objects.
Current implementations are:
     - Local execution (QProcess-based), provided via the DesktopDevice.
     - Remote execution via SSH.
     - A specialized case of the former for remote Linux systems (provided by
       LinuxDevice).
The latter is already being used in a number of places. As a result, lots of
code dealing with details such as setting the remote environment could be
moved to a central location. These things are no longer the concern of whoever
is wishing to run a remote process.

Change-Id: I919260ee6e77a020ca47226a4a534e7b8398106f
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/remotelinux/linuxdeviceprocess.cpp

@@ -0,0 +1,84 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 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 "linuxdeviceprocess.h"
+
+#include <utils/environment.h>
+#include <utils/qtcprocess.h>
+
+namespace RemoteLinux {
+
+static QString quote(const QString &s) { return Utils::QtcProcess::quoteArgUnix(s); }
+
+LinuxDeviceProcess::LinuxDeviceProcess(const QSharedPointer<const ProjectExplorer::IDevice> &device,
+        QObject *parent)
+    : ProjectExplorer::SshDeviceProcess(device, parent)
+{
+    setEnvironment(Utils::Environment(Utils::OsTypeLinux));
+}
+
+void LinuxDeviceProcess::setRcFilesToSource(const QStringList &filePaths)
+{
+    m_rcFilesToSource = filePaths;
+}
+
+void LinuxDeviceProcess::setWorkingDirectory(const QString &directory)
+{
+    m_workingDir = directory;
+}
+
+QString LinuxDeviceProcess::fullCommandLine() const
+{
+    QString fullCommandLine;
+    foreach (const QString &filePath, rcFilesToSource())
+        fullCommandLine += QString::fromLatin1("test -f %1 && source %1;").arg(filePath);
+    if (!m_workingDir.isEmpty()) {
+        fullCommandLine.append(QLatin1String("cd ")).append(quote(m_workingDir))
+                .append(QLatin1String(" && "));
+    }
+    const QString envString = environment().toStringList().join(QLatin1String(" "));
+    if (!envString.isEmpty())
+        fullCommandLine.append(QLatin1Char(' ')).append(envString);
+    if (!fullCommandLine.isEmpty())
+        fullCommandLine += QLatin1Char(' ');
+    fullCommandLine.append(quote(executable()));
+    if (!arguments().isEmpty()) {
+        fullCommandLine.append(QLatin1Char(' '));
+        fullCommandLine.append(Utils::QtcProcess::joinArgsUnix(arguments()));
+    }
+    return fullCommandLine;
+}
+
+QStringList LinuxDeviceProcess::rcFilesToSource() const
+{
+    if (!m_rcFilesToSource.isEmpty())
+        return m_rcFilesToSource;
+    return QStringList() << QLatin1String("/etc/profile") << QLatin1String("$HOME/.profile");
+}
+
+} // namespace RemoteLinux