mochi: add updateScript

pkgs/by-name/mo/mochi/package.nix

@@ -31,6 +31,8 @@ let
       substituteInPlace $out/share/applications/${pname}.desktop \
         --replace-fail 'Exec=AppRun --no-sandbox' 'Exec=${pname}'
     '';
+
+    passthru.updateScript = ./update.sh;
   };
 
   darwin = stdenv.mkDerivation {

pkgs/by-name/mo/mochi/update.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl nix common-updater-scripts
+
+set -euo pipefail
+
+latestVersion=$(curl -Ls https://mochi.cards/ | grep -oP 'Mochi-\K[0-9]+\.[0-9]+\.[0-9]+(?=\.AppImage)' | head -1)
+currentVersion=$(nix-instantiate --eval -E "with import ./. {}; mochi.version" | tr -d '"')
+
+echo "latest  version: $latestVersion"
+echo "current version: $currentVersion"
+
+if [[ "$latestVersion" == "$currentVersion" ]]; then
+    echo "package is up-to-date"
+    exit 0
+fi
+
+# Update version and hash for x86_64-linux (AppImage)
+update-source-version mochi "$latestVersion" --system=x86_64-linux
+
+# Update hashes for darwin systems
+for system in x86_64-darwin aarch64-darwin; do
+    url=$(nix-instantiate --eval --json -E "with import ./. { system = \"$system\"; }; mochi.src.url" | tr -d '"')
+    hash=$(nix-prefetch-url "$url")
+    sriHash=$(nix --extra-experimental-features nix-command hash convert --hash-algo sha256 --to sri "$hash")
+    update-source-version mochi "$latestVersion" "$sriHash" --system="$system" --ignore-same-version
+done