youtrack: add update script

pkgs/by-name/yo/youtrack/package.nix

@@ -31,6 +31,8 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
+  passthru.updateScript = ./update.sh;
+
   meta = {
     description = "Issue tracking and project management tool for developers";
     maintainers = lib.teams.serokell.members ++ [ lib.maintainers.leona ];

pkgs/by-name/yo/youtrack/update.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl xq-xml common-updater-scripts
+
+set -eu -o pipefail
+
+version="$(curl https://www.jetbrains.com/youtrack/update.xml | \
+    xq -x "/products/product[@name='YouTrack']/channel/build/@version")"
+
+update-source-version youtrack "$version"