gitkraken: setup auto-update script

pkgs/by-name/gi/gitkraken/package.nix

@@ -6,7 +6,6 @@
   fetchzip,
   makeDesktopItem,
   makeWrapper,
-  nix-update-script,
   adwaita-icon-theme,
   alsa-lib,
   at-spi2-atk,
@@ -93,12 +92,15 @@ let
     mainProgram = "gitkraken";
   };
 
+  passthru.updateScript = ./update.sh;
+
   linux = stdenv.mkDerivation rec {
     inherit
       pname
       version
       src
       meta
+      passthru
       ;
 
     dontBuild = true;
@@ -228,6 +230,7 @@ let
       version
       src
       meta
+      passthru
       ;
 
     nativeBuildInputs = [

pkgs/by-name/gi/gitkraken/update.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p common-updater-scripts curl jq
+
+set -euo pipefail
+
+scriptDir=$(cd "${BASH_SOURCE[0]%/*}" && pwd)
+nixpkgs=$(realpath "$scriptDir"/../../../..)
+
+# All architectures are released together, therefore we get the latest version from the linux release
+# NOTE: for some reason, the darwin RELEASES (ie. /darwin/RELEASES) file returns a frozen version...
+echo >&2 "=== Obtaining version data from release.axocdn.com..."
+version=$(curl -fsSL https://release.axocdn.com/linux/RELEASES | jq -r '.name')
+
+# Hardcoded URLs to compute hashes
+declare -A tarballs=(
+  ["x86_64-linux"]="https://release.axocdn.com/linux/GitKraken-v${version}.tar.gz"
+  ["x86_64-darwin"]="https://release.axocdn.com/darwin/GitKraken-v${version}.zip"
+  ["aarch64-darwin"]="https://release.axocdn.com/darwin-arm64/GitKraken-v${version}.zip"
+)
+
+for arch in "${!tarballs[@]}"; do
+  # We precalculate the hash before calling update-source-version because it attempts to calculate each architecture's
+  # package's hash by running `nix-build --system <architecture> -A gitkraken.src` which causes cross compiling headaches
+  echo >&2 "=== Downloading ${arch} package and computing its hash..."
+  hash=$(nix-hash --sri --type sha256 "$(nix-prefetch-url --print-path --unpack "${tarballs[${arch}]}" | tail -n1)")
+  echo >&2 "=== Updating package.nix for ${arch}..."
+  # update-source-version expects to be at the root of nixpkgs
+  (cd "${nixpkgs}" && update-source-version gitkraken "${version}" "${hash}" --system="${arch}" --version-key="srcs.${arch}")
+done
+
+echo >&2 "=== Done!"