openvswitch: add updateScript

pkgs/os-specific/linux/openvswitch/generic.nix

@@ -1,5 +1,6 @@
 { version
 , hash
+, updateScriptArgs ? ""
 }:
 
 { lib
@@ -20,6 +21,7 @@
 , sphinxHook
 , util-linux
 , which
+, writeScript
 }:
 
 let
@@ -105,6 +107,10 @@ in stdenv.mkDerivation rec {
     pytest
   ]);
 
+  passthru.updateScript = writeScript "ovs-update.nu" ''
+    ${./update.nu} ${updateScriptArgs}
+  '';
+
   meta = with lib; {
     changelog = "https://www.openvswitch.org/releases/NEWS-${version}.txt";
     description = "A multilayer virtual switch";

pkgs/os-specific/linux/openvswitch/lts.nix

@@ -1,4 +1,5 @@
 import ./generic.nix {
   version = "2.17.6";
   hash = "sha256-dNqvK+c0iuXdQBe6RbjaxlNB8Vn0+0paecVC/tQQENk=";
+  updateScriptArgs = "--lts=true --regex '2\.17.*'";
 }

pkgs/os-specific/linux/openvswitch/update.nu

@@ -0,0 +1,19 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i nu -p nushell common-updater-scripts
+
+def main [--lts: bool = false, --regex: string] {
+  let tags = list-git-tags --url=https://github.com/openvswitch/ovs | lines | sort --natural | str replace v ''
+
+  let latest_tag = if $regex == null { $tags } else { $tags | find --regex $regex } | last
+  let current_version = nix eval --raw -f default.nix $"openvswitch(if $lts {"-lts"}).version" | str trim
+
+  if $latest_tag != $current_version {
+    if $lts {
+      update-source-version openvswitch-lts $latest_tag $"--file=(pwd)/pkgs/os-specific/linux/openvswitch/lts.nix"
+    } else {
+      update-source-version openvswitch $latest_tag $"--file=(pwd)/pkgs/os-specific/linux/openvswitch/default.nix"
+    }
+  }
+
+  {"lts?": $lts, before: $current_version, after: $latest_tag}
+}