NVIDIA driver: Add systemd support

debian/postinst

@@ -8,6 +8,7 @@ case "$1" in
         then
             systemctl daemon-reload || true
             systemctl enable live-installer.service || true
+            systemctl enable install-live-drivers.service || true
         fi
     ;;
     abort-upgrade|abort-remove|abort-deconfigure)

lib/systemd/system/install-live-drivers.service

+[Unit]
+Description=Installing Live Drivers
+Before=lightdm.service
+Wants=network-online.target
+After=network.target network-online.target
+
+[Service]
+Type=oneshot
+Restart=no
+Before=lightdm.service
+ExecStart=/usr/bin/install-live-drivers
+StandardOutput=tty
+TTYPath=/dev/tty1
+
+[Install]
+WantedBy=multi-user.target
+

usr/bin/install-live-drivers

+#!/usr/bin/python2
+
+import os
+import commands
+
+#NVIDIA
+driver = "/usr/share/live-installer/nvidia-driver.tar.gz"
+if "install-nvidia=" in commands.getoutput("cat /proc/cmdline") and os.path.exists(driver):
+    print("Installing NVIDIA driver...")
+    try:
+        os.system("tar zxvf %s" % driver)
+        os.system("DEBIAN_FRONTEND=noninteractive dpkg -i --force-depends nvidia-driver/*.deb")
+        os.system("rm -rf nvidia-driver")
+    except Exception as e:
+        print ("Failed to install NVIDIA driver: ", e)