[AdamLovattDevOps]

Adds a native Linux build of the port, packaged as a single self-contained AppImage, aimed at SteamOS-like handhelds (Steam Deck, Legion Go, ROG Ally on Bazzite/SteamOS) and desktop Linux. No Proton is needed, and no .NET install on the device.

Depends on Comfubar/RecompOne-PS1Ports#1 (widescreen and the handheld menu bar). This PR bumps the RecompOne submodule to that commit, so it needs merging after that one.

What's added

• tools/linux/build-appimage.sh [disc.cue]: recompiles from the player's own disc, runs dotnet publish -r linux-x64 --self-contained, and packages dist/KnowYourRole-x86_64.AppImage with appimagetool, run with --appimage-extract-and-run so it works without FUSE (containers, WSL).
• tools/linux/Dockerfile: the build environment (.NET 10 SDK, git, curl, python3), so no local SDK is needed:

  docker build -t kyr-linux tools/linux
  docker run --rm --user "$(id -u):$(id -g)" -v "$PWD:/src" -v "/path/to/disc:/disc:ro" kyr-linux "/disc/Game.cue"
  

• tools/linux/AppRun:
  • keeps saves, settings and logs in ~/.local/share/KnowYourRoleRecomp (via RECOMPONE_DATA_DIR/RECOMPONE_LOG_DIR), since an AppImage is read-only;
  • takes the disc from an argument, $KYR_DISC, or disc.txt, and fills CdPath in settings.json while it's empty, because WaitForValidDisc only checks the saved path. Otherwise the game shows its own picker as usual.
• README: a new "Linux and SteamOS handhelds (AppImage)" section.
• .gitignore: adds publish/.

No Windows code paths change. The runtime was already cross-platform (Silk.NET SDL2/GL/OpenAL, and user32 is only used behind OperatingSystem.IsWindows()).

Testing

• Built through the Dockerfile from a clean state: recompile, publish and package take about 3 minutes, and the output is owned by the calling user.
• Ran on a Legion Go 2 (Bazzite, Radeon 890M, GL 4.6) as a non-Steam game in Game Mode:
  • boots straight into the game from disc.txt;
  • intro FMV, menus, character select and an exhibition match in progress all work;
  • the built-in controller is picked up through SDL;
  • widescreen auto gives 16:10 on the 1920×1200 panel.
• The AppImage contains code generated from the player's disc. The README tells people not to share it, and nothing from the disc is committed (disc/ and generated/ are already ignored).

🤖 Generated with Claude Code

https://claude.ai/code/session_01Bv5RE3i31GtUaGF5wSNaCm