win-virtio: add updateScript

pkgs/applications/virtualization/driver/win-virtio/default.nix

@@ -24,6 +24,8 @@ stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
+  passthru.updateScript = ./update.sh;
+
   meta = with lib; {
     description = "Windows VirtIO Drivers";
     homepage = "https://docs.fedoraproject.org/en-US/quick-docs/creating-windows-virtual-machines-using-virtio-drivers/index.html";

pkgs/applications/virtualization/driver/win-virtio/update.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl pup common-updater-scripts
+
+set -eu -o pipefail
+
+version="$(curl -Ls https://fedorapeople.org/groups/virt/virtio-win/repo/latest/ | \
+        pup 'a[href*="virtio-win-"] text{}' | \
+        sed -E 's/virtio-win-(.*)\.noarch\.rpm/\1/' | \
+        sort -Vu | \
+        tail -n1)"
+
+update-source-version win-virtio "$version"