ProjectExplorer: Add FileAccessFactory

Change-Id: I2468934bae03f352b8011224f345795ba8941862
Reviewed-by: hjk <hjk@qt.io>

src/plugins/projectexplorer/devicesupport/idevice.cpp

@@ -139,6 +139,7 @@ public:
     IDevice::MachineType machineType = IDevice::Hardware;
     OsType osType = OsTypeOther;
     DeviceFileAccess *fileAccess = nullptr;
+    std::function<DeviceFileAccess *()> fileAccessFactory;
     int version = 0; // This is used by devices that have been added by the SDK.
 
     Utils::SynchronizedValue<SshParameters> sshParameters;
@@ -251,6 +252,9 @@ bool IDevice::isAnyUnixDevice() const
 
 DeviceFileAccess *IDevice::fileAccess() const
 {
+    if (d->fileAccessFactory)
+        return d->fileAccessFactory();
+
     return d->fileAccess;
 }
 
@@ -341,6 +345,11 @@ void IDevice::setFileAccess(DeviceFileAccess *fileAccess)
     d->fileAccess = fileAccess;
 }
 
+void IDevice::setFileAccess(std::function<Utils::DeviceFileAccess *()> fileAccessFactory)
+{
+    d->fileAccessFactory = fileAccessFactory;
+}
+
 IDevice::DeviceInfo IDevice::deviceInformation() const
 {
     const QString key = Tr::tr("Device");

src/plugins/projectexplorer/devicesupport/idevice.h

@@ -241,6 +241,7 @@ protected:
     void setDisplayType(const QString &type);
     void setOsType(Utils::OsType osType);
     void setFileAccess(Utils::DeviceFileAccess *fileAccess);
+    void setFileAccess(std::function<Utils::DeviceFileAccess *()> fileAccessFactory);
 
 private:
     IDevice(const IDevice &) = delete;