Warlock

A multi-platform front-end client for Simutronics MUDs — DragonRealms, GemStone IV, and other Simutronics titles. Built with Kotlin Multiplatform and Jetpack Compose, with targets for Desktop (Windows, macOS, Linux), Android, and iOS.

For player-facing information, screenshots, and general usage, see the project site at warlockfe.github.io.

Download

Pre-built desktop packages for Windows, macOS (Apple Silicon and Intel), and Linux (deb, AppImage) are available on the GitHub Releases page.

Installed copies update themselves automatically against published releases. The Android and iOS versions are still a WIP and haven't had any official releases.

Contributing

Bug reports and pull requests are welcome.

• Issues: file bugs and feature requests at github.com/sproctor/warlock3/issues. Include the OS, the build version (Help → About), and steps to reproduce.
• Pull requests: branch from develop, keep changes focused, and run ./gradlew check before pushing. ktlint runs as part of check — fix any formatting violations with ./gradlew ktlintFormat.
• Larger changes: open an issue first to talk through the approach before writing the code.
• License: the project is Apache 2.0 (see LICENSE). By contributing, you agree your changes are licensed under the same terms.

Development

Requirements

See the KMP quickstart for general setup instructions.

You will need at least:

• A JDK environment.
• Git.
• Android Studio or IntelliJ IDEA + the Android SDK.
• For iOS development: macOS with Xcode.

Running the desktop app

./gradlew :desktopApp:run

(Plain ./gradlew run works too — it resolves to the same task.)

For a faster edit-recompile loop with Compose Hot Reload:

./gradlew :desktopApp:hotRun

Useful command-line flags exposed by the desktop entry point — pass them after --args="...":

• <path.sal> — connect using a Simutronics .sal launch file passed as a positional argument
• -c <name> — auto-connect to a saved connection by name
• -i <path> / --stdin — replay a log file or stdin instead of connecting to a server
• -d — enable debug logging
• --sge-host, --sge-port, --sge-secure — point at an alternate SGE endpoint

Example:

./gradlew :desktopApp:run --args="-c Tefrin -d"
./gradlew :desktopApp:run --args="/path/to/launch.sal"

Running tests and lint

./gradlew check          # tests + ktlint
./gradlew allTests       # multiplatform tests
./gradlew jvmTest        # JVM tests only
./gradlew ktlintFormat   # auto-fix ktlint violations

Android

Open the project in Android Studio and run the androidApp configuration, or from the CLI:

./gradlew :androidApp:installDebug

Building packages locally

The desktop packaging tasks produce installers for the current OS via the Potassium Gradle plugin (which packages through electron-builder).

Native installer for your current OS

./gradlew :desktopApp:packageDistributionForCurrentOS

Outputs land in desktopApp/build/compose/binaries/main/. Format depends on the host:

• Linux: .deb, AppImage, .tar under binaries/main/
• macOS: .dmg under binaries/main/dmg/
• Windows: .msi and NSIS .exe installer under binaries/main/

For a release build with ProGuard applied, use packageReleaseDistributionForCurrentOS.

Just the app image (no installer)

Useful for quick smoke tests of the packaged app without building an installer:

./gradlew :desktopApp:createDistributable
./gradlew :desktopApp:runDistributable     # build + launch

Individual installer formats

./gradlew :desktopApp:packageDeb       # Linux .deb
./gradlew :desktopApp:packageDmg       # macOS .dmg (macOS host only)
./gradlew :desktopApp:packageMsi       # Windows .msi (Windows host only)
./gradlew :desktopApp:packageNsis      # Windows NSIS installer

Note: each installer format can only be built on its native host OS. The CI release workflow runs the matrix across all three platforms.

Configuring the version

By default the build uses the version declared in gradle.properties. To override (e.g. to mirror what CI does for tagged releases), set RELEASE_VERSION:

RELEASE_VERSION=v3.0.167-beta.1 ./gradlew :desktopApp:packageDistributionForCurrentOS

The leading v is stripped automatically. The base version (without any -beta.N suffix) is used for Windows .exe VERSIONINFO and macOS CFBundleVersion, which both require dotted-integer format; the full version is preserved in the artifact filename and on Linux packages.

Cutting a release

Releases are driven by tag pushes — the release.yaml workflow builds and publishes the matrix:

./release.sh 3.0.167          # or e.g. 3.0.167-beta.1

This tags the current commit and pushes it; CI handles the rest.

Project structure

Top-level modules:

• core/ — multiplatform business logic (client, networking, macro/scripting, preferences)
• wrayth/ — SGE protocol parser (ANTLR)
• scripting/ — scripting engine (ANTLR-based WSL plus Lua via lua-kmp)
• compose/ — shared Compose UI (desktop screens use Jewel; mobile screens use Material3)
• desktopApp/ — JVM desktop entry point
• androidApp/ — Android wrapper

See CLAUDE.md for a longer architectural tour.

License

Apache License 2.0. See LICENSE for the full text.