Linux only: allow NVMe destination drives

ON LINUX PLATFORM ONLY

Allow NVMe destination drives as long as they are not mounted
except under /media

This does increase the risk of someone accidently selecting an
internal NVMe drive that is not mounted under the current OS
(Linux) but do is being used by the other operating system
(e.g. Windows) on dual boot systems.
But is deemed to be an acceptable risk.

Ref #158

debian/changelog

@@ -2,8 +2,13 @@ rpi-imager (1.6) unstable; urgency=medium
 
   * Wayland: fix "Client tried to set invalid geometry" error
   * Add advanced users option screen available under SHIFT-CTRL-X
+  * Disable high DPI scaling on incorrect EDID
+  * Fix handling of .iso files
+  * Update translations
+  * GUI: change "SD card" -> "Storage"
+  * Allow NVMe drives as destination drive (Linux only)
 
- -- Floris Bos <bos@je-eigen-domein.nl>  Fri, 15 Jan 2021 22:00:21 +0100
+ -- Floris Bos <bos@je-eigen-domein.nl>  Fri, 26 Feb 2021 14:32:21 +0100
 
 rpi-imager (1.5) unstable; urgency=medium
 

linux/linuxdrivelist.cpp

@@ -126,6 +126,25 @@ namespace Drivelist
             }
             dp.removeAll("");
             d.description = dp.join(" ").toStdString();
+
+            /* Mark internal NVMe drives as non-system if not mounted
+               anywhere else than under /media */
+            if (d.isSystem && subsystems.contains("nvme"))
+            {
+                bool isMounted = false;
+                for (std::string mp : d.mountpoints)
+                {
+                    if (!QByteArray::fromStdString(mp).startsWith("/media/")) {
+                        isMounted = true;
+                        break;
+                    }
+                }
+                if (!isMounted)
+                {
+                    d.isSystem = false;
+                }
+            }
+
             deviceList.push_back(d);
         }