goarista: add passthru.updateScript

pkgs/by-name/go/goarista/package.nix

@@ -18,6 +18,8 @@ buildGoModule {
 
   vendorHash = "sha256-n+P3L3dT2kYuTyI2qX/nrLRgFIUsP3kkwNZmRQ8EFRs=";
 
+  passthru.updateScript = ./update.sh;
+
   checkFlags =
     let
       skippedTests = [

pkgs/by-name/go/goarista/update.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p nix-update gnused
+
+set -eou pipefail
+
+nix-update pkgs.goarista --version branch
+
+# The last github release in 2020 was named ockafka-v0.0.5.
+# I don't want this in the version name, it's from when Arista
+# was doing per-package releases in the repo, and not just trunk
+sed -i 's/ockafka-v0\.0\.5-/0-/' pkgs/by-name/go/goarista/package.nix