ProjectExplorer: Introduce DeviceProcessKiller

It will be much easier to integrate it into TaskTree,
comparing to hierarchical DeviceProcessSignalOperation.

Change-Id: I6bc9580a3d88d7bfd01e641b09094c6fa8fb94d3
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/devicesupport/idevice.cpp

@@ -3,10 +3,10 @@
 
 #include "idevice.h"
 
-#include "sshparameters.h"
+#include "devicemanager.h"
-
 #include "deviceprocesslist.h"
 #include "idevicefactory.h"
+#include "sshparameters.h"
 
 #include "../kit.h"
 #include "../kitinformation.h"
@@ -654,4 +654,33 @@ DeviceProcessSignalOperation::DeviceProcessSignalOperation() = default;
 
 DeviceEnvironmentFetcher::DeviceEnvironmentFetcher() = default;
 
+void DeviceProcessKiller::start()
+{
+    m_signalOperation.reset();
+    m_errorString.clear();
+
+    const IDevice::ConstPtr device = DeviceManager::deviceForPath(m_processPath);
+    if (!device) {
+        m_errorString = tr("No device for given path: \"%1\".").arg(m_processPath.toUserOutput());
+        emit done(false);
+        return;
+    }
+
+    m_signalOperation = device->signalOperation();
+    if (!m_signalOperation) {
+        m_errorString = tr("Device for path \"%1\" does not support killing processes.")
+                       .arg(m_processPath.toUserOutput());
+        emit done(false);
+        return;
+    }
+
+    connect(m_signalOperation.get(), &DeviceProcessSignalOperation::finished,
+            this, [this](const QString &errorMessage) {
+        m_errorString = errorMessage;
+        emit done(m_errorString.isEmpty());
+    });
+
+    m_signalOperation->killProcess(m_processPath.path());
+}
+
 } // namespace ProjectExplorer

src/plugins/projectexplorer/devicesupport/idevice.h

@@ -257,7 +257,6 @@ private:
     friend class DeviceManager;
 };
 
-
 class PROJECTEXPLORER_EXPORT DeviceTester : public QObject
 {
     Q_OBJECT
@@ -277,4 +276,22 @@ protected:
     explicit DeviceTester(QObject *parent = nullptr);
 };
 
+class PROJECTEXPLORER_EXPORT DeviceProcessKiller : public QObject
+{
+    Q_OBJECT
+
+public:
+    void setProcessPath(const Utils::FilePath &path) { m_processPath = path; }
+    void start();
+    QString errorString() const { return m_errorString; }
+
+signals:
+    void done(bool success);
+
+private:
+    Utils::FilePath m_processPath;
+    DeviceProcessSignalOperation::Ptr m_signalOperation;
+    QString m_errorString;
+};
+
 } // namespace ProjectExplorer