add plexpass package

nixos/pkgs/plex-pass/update.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+set -x
+shopt -s extglob
+set -eu -o pipefail
+
+path="$(realpath "$(dirname "$0")")"
+
+declare -A platforms=(
+  [linux-x86_64]=x86_64-linux
+  [linux-aarch64]=aarch64-linux
+)
+
+token=$(vault kv get -field=plex_token hades_secrets/nixos/plex)
+manifest=$(curl -s "https://plex.tv/api/downloads/5.json?channel=plexpass" -H "X-Plex-Token: ${token}")
+version=$(echo "$manifest" | jq -r '.computer.Linux.version | split("-") | .[0]')
+
+tmp="$path/sources.tmp.json"
+echo '' >$tmp
+
+for arch in "${!platforms[@]}"; do
+  url="$(echo "$manifest" | jq --arg arch "$arch" -r '.computer.Linux.releases[] | select(.distro == "debian" and .build == $arch) .url')"
+  hash="$(nix-prefetch-url "$url")"
+  nixPlatform=${platforms[$arch]}
+  jq --arg version $version \
+    --arg platform $nixPlatform \
+    --arg url "$url" \
+    --arg hash $hash \
+    -n '$ARGS.named' >>$tmp
+done
+
+jq -s '.' $tmp >"$path/sources.json"
+rm $tmp