Add updater script

pkgs/reaper/updater.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl common-updater-scripts
+
+set -euo pipefail
+
+reaper_ver=$(curl -Ls https://www.reaper.fm/download.php | grep -o 'Version [0-9]\.[0-9]*' | head -n1 | cut -d' ' -f2)
+
+function set_hash_for_arch() {
+  local arch=$1
+  pkg_hash=$(nix-prefetch-url https://www.reaper.fm/files/${reaper_ver%.*}.x/reaper${reaper_ver/./}_linux_$arch.tar.xz)
+  pkg_hash=$(nix hash to-sri "sha256:$pkg_hash")
+  # reset the version so the second architecture update doesn't get ignored
+  update-source-version reaper 0 "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" --system=$arch-linux
+  update-source-version reaper "${reaper_ver}" "$pkg_hash" --system=$arch-linux
+}
+
+set_hash_for_arch aarch64
+set_hash_for_arch x86_64