Add virtio-win-updater

postinstall

@@ -585,6 +585,41 @@ EOF
 EOF
 }
 
+virtiowin_updater() {
+    log "Installing virtio-win-updater"
+    cat << EOF > /usr/local/bin/virtio-win-updater
+#!/bin/bash
+#
+# This script updates the virtio-win iso in Proxmox local storage
+content=\$(wget -q -O - https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/)
+server=https://fedorapeople.org
+path=\$(echo -e "\$content" | grep -m1 title | cut -d "<" -f2 | cut -d " " -f3)
+file=\$(echo -e "\$content" | grep -Eo "virtio-win-0.1.[0-9]+.iso" | grep -m1 virtio)
+url=\$server\$path/\$file
+if ! find /var/lib/vz/template/iso/\$file > /dev/null 2>&1 ; then
+    echo "\$(date) New version available. Downloading \$file."
+    wget -q -O /var/lib/vz/template/iso/\$file \$url
+    old_virtio=\$(find /var/lib/vz/template/iso/ -name virtio-win* | grep -v \$file)
+    if [ \$? -eq 0 ]; then
+        for line in \$old_virtio; do
+            if ! grep \$(echo \$line | cut -d'/' -f7) /etc/pve/qemu-server/* ; then
+                echo "\$(date) Deleting \$line."
+                rm -f \$line
+            else
+                echo "\$(date) Keeping \$line - Still in use by VMs."
+            fi
+        done
+    fi
+else
+    echo "\$(date) Already on the current stable version: \$file."
+fi
+EOF
+    chmod +x /usr/local/bin/virtio-win-updater
+    ln -sf /usr/local/bin/virtio-win-updater /etc/cron.daily/virtio-win-updater
+    log "Running virtio-win-updater"
+    virtio-win-updater
+}
+
 installation_task(){
     log "Starting Installation"
 
@@ -604,6 +639,7 @@ installation_task(){
     set_mail_delivery
     create_swap_pool
     set_default_volblocksize
+    virtiowin_updater
 
     log "Updating initramfs - This will take some time..."
     update-initramfs -u -k all > /dev/null 2>&1