From 5d5a33a8e3c8ca92cbf4b1dfb6a8930fe87803c5 Mon Sep 17 00:00:00 2001
From: Matteo Pacini <matteo@codecraft.it>
Date: Mon, 12 Aug 2024 08:41:27 +0100
Subject: [PATCH] loopwm: added updateScript

---
 pkgs/by-name/lo/loopwm/package.nix |  4 ++++
 pkgs/by-name/lo/loopwm/update.sh   | 20 ++++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100755 pkgs/by-name/lo/loopwm/update.sh

diff --git a/pkgs/by-name/lo/loopwm/package.nix b/pkgs/by-name/lo/loopwm/package.nix
index 5b1829a8ee04..bb3f2cca9a05 100644
--- a/pkgs/by-name/lo/loopwm/package.nix
+++ b/pkgs/by-name/lo/loopwm/package.nix
@@ -29,6 +29,10 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
+  passthru = {
+    updateScript = ./update.sh;
+  };
+
   meta = {
     description = "macOS Window management made elegant";
     homepage = "https://github.com/MrKai77/Loop";
diff --git a/pkgs/by-name/lo/loopwm/update.sh b/pkgs/by-name/lo/loopwm/update.sh
new file mode 100755
index 000000000000..82b720fa98fd
--- /dev/null
+++ b/pkgs/by-name/lo/loopwm/update.sh
@@ -0,0 +1,20 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl jq gnused
+
+set -euo pipefail
+
+cd "$(dirname "$0")" || exit 1
+
+# Grab latest release version
+LOOPWM_LATEST_VER="$(curl --fail -s ${GITHUB_TOKEN:+-u ":$GITHUB_TOKEN"} "https://api.github.com/repos/MrKai77/Loop/releases/latest" | jq -r '.tag_name' | sed 's/^v//')"
+LOOPWM_CURRENT_VER="$(grep -oP 'version = "\K[^"]+' package.nix)"
+
+if [[ "$LOOPWM_LATEST_VER" == "$LOOPWM_CURRENT_VER" ]]; then
+    echo "loopwm is up-to-date"
+    exit 0
+fi
+
+LOOPWM_DARWIN_HASH="$(nix-hash --to-sri --type sha256 "$(nix-prefetch-url --type sha256 "https://github.com/MrKai77/Loop/releases/download/${LOOPWM_LATEST_VER}/Loop.zip")")"
+
+sed -i "s#hash = \".*\"#hash = \"$LOOPWM_DARWIN_HASH\"#g" package.nix
+sed -i "s#version = \".*\";#version = \"$LOOPWM_LATEST_VER\";#g" package.nix