podman-desktop: refine updateScript to bump electron and pnpm version

pkgs/by-name/po/podman-desktop/package.nix

@@ -10,6 +10,11 @@
   makeDesktopItem,
   darwin,
   nix-update-script,
+  _experimental-update-script-combinators,
+  writeShellApplication,
+  nix,
+  jq,
+  gnugrep,
 }:
 
 let
@@ -19,7 +24,32 @@ stdenv.mkDerivation (finalAttrs: {
   pname = "podman-desktop";
   version = "1.18.1";
 
-  passthru.updateScript = nix-update-script { };
+  passthru.updateScript = _experimental-update-script-combinators.sequence [
+    (nix-update-script { })
+    (lib.getExe (writeShellApplication {
+      name = "${finalAttrs.pname}-dependencies-updater";
+      runtimeInputs = [
+        nix
+        jq
+        gnugrep
+      ];
+      runtimeEnv = {
+        PNAME = finalAttrs.pname;
+        PKG_FILE = builtins.toString ./package.nix;
+      };
+      text = ''
+        new_src="$(nix-build --attr "pkgs.$PNAME.src" --no-out-link)"
+        new_electron_major="$(jq '.devDependencies.electron' "$new_src/package.json" | grep --perl-regexp --only-matching '\d+' | head -n 1)"
+        new_pnpm_major="$(jq '.packageManager' "$new_src/package.json" | grep --perl-regexp --only-matching '\d+' | head -n 1)"
+        sed -i -E "s/electron_[0-9]+/electron_$new_electron_major/g" "$PKG_FILE"
+        sed -i -E "s/pnpm_[0-9]+/pnpm_$new_pnpm_major/g" "$PKG_FILE"
+      '';
+    }))
+    (nix-update-script {
+      # Changing the pnpm version requires updating `pnpmDeps.hash`.
+      extraArgs = [ "--version=skip" ];
+    })
+  ];
 
   src = fetchFromGitHub {
     owner = "containers";