warp-engine-desktop-gui — a window for the desktop store

A graphical client for warp-engine-desktop-store: the catalog as a grid of cards, one click to install a title into your own application menu, one to play it, one to remove it. Linux, macOS and Windows.

The CLI stays the product; this is its front door. Every action here runs desktop_store.py, so there is one catalog logic, one state file and one delete guard — the window never touches the filesystem itself.

It is also the Windows install path. The store's own installer is curl … | sh, which Windows does not have; this app downloads the store engine itself, into the same folder the shell installer would use.

What it needs

• Python 3 on the machine, because the store is a Python program. The app looks for python3, python and py -3, and says so plainly if none answer.
• Nothing else at runtime. No Node, no package manager, no admin rights: the store installs under your own user account.

Install

Grab the package for your machine from the releases and open it. On first run, if there is no store on the machine yet, the window offers to download one — that is the whole setup.

Opening it on macOS

The build is ad-hoc signed but not notarised, so macOS asks before running a copy that came from a browser. The reliable way through:

xattr -dr com.apple.quarantine "/Applications/WarpEngine Store.app"

If macOS offers Open Anyway under System Settings ▸ Privacy & Security after a blocked attempt, that works as well. Notarisation is the only thing that removes the step entirely, and it needs a paid Apple Developer ID.

Nothing the store itself downloads is affected: Python fetches those files, and Python does not set the quarantine flag.

v1.0.0 could not be opened at all — it reported "is damaged". The bundle had never been signed; only its main executable carried the linker's ad-hoc signature, so there was no resource seal and Gatekeeper refused it outright rather than asking. scripts/after-pack.js signs the bundle during the build now, and the result verifies as valid on disk.

Use

• Install all fetches everything the catalog offers for this machine.
• A card's button is Install, Update, or Play / Open once it is there. Remove takes a title back out.
• Each card says whether it is native — unpacked and run locally, works offline — or hosted: a browser build the catalog serves rather than packages, so its entry opens a page and needs the network.
• The Log drawer at the bottom carries the store's own output verbatim, and next to it are buttons that open the two folders everything lands in.
• The language follows the system and can be switched; English and Hungarian.

Anything installed from the window is a normal menu entry, so it also shows up in your launcher, Dock or Start menu — the app does not have to be running to play.

Development

npm install
npm start                  # the window, against whatever store is installed
npm run smoke              # the bridge only: no window, no Electron
npm run uitest             # loads the window once and reports what rendered
npm run dist:mac           # or dist:win / dist:linux

Node 22 or newer is needed to install, not to run: Electron's own installer is ESM-only, and older Node cannot require() it. The packaged app carries its own runtime.

npm run uitest runs with its own user-data directory and without the single-instance lock. Otherwise a copy the user already has open swallows the test process, which exits 0 and reads as a pass.

Both test scripts accept a sandbox store instead of the real one, which is how this repository is tested without touching a working installation:

STORE_ROOT=/tmp/sandbox-root npm start
SMOKE_HOME=/tmp/sandbox-root/ttg-desktop npm run smoke

How it is put together

File	What it does
main.js	the window, the IPC, and the one-call-at-a-time guard
preload.js	the entire surface the renderer gets — no Node reaches it
lib/store.js	finds the store and Python, runs the CLI, parses its JSON
lib/bootstrap.js	downloads the engine, the shared core and a config
lib/i18n.js	the two string tables
renderer/	plain HTML, CSS and JS — no framework, no build step

contextIsolation is on, nodeIntegration off, sandbox on, and the page carries a CSP that allows only its own script and stylesheet plus images over HTTPS. Links open in the real browser; the window itself never navigates.

lib/store.js talks to the CLI through --json, which puts data on stdout and the human-readable log on stderr. That flag arrived with engine 1.1.0, and the client checks: an older store is met with an offer to refresh it rather than a failed call.

The bridge keeps an ENGINES list with one entry today. The RetroArch store has the same command shape, so a second entry is the whole change needed to drive it too — that is why the indirection is there.

Verified, and not

Exercised on macOS (arm64), with the packaged app from the release rather than a dev run: the store is discovered, the catalog lists, a sync installs, the window renders the installed state, and npm run uitest passes with the grid rendered and both languages in the picker. The bootstrap download was run into an empty directory and the resulting store answered the bridge.

The signing was measured rather than assumed, by setting the quarantine flag on a copy unzipped from the release artifact: codesign --verify --deep --strict is clean, and syspolicy_check reports only the expected "adhoc signed" warning. A quarantined copy is still stopped until it is approved — that part is Gatekeeper policy, not a fault in the package.

Not tried on Linux or Windows. The paths and the launch behaviour are written for them, and the store CLI itself has the same gap — .desktop and .lnk launchers have been generated and read, but nobody has clicked one.