start working on a sauerbraten flatpak

org.sauerbraten.Cube2.json

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+{
+    "app-id": "org.sauerbraten.Cube2",
+    "runtime": "org.kde.Platform",
+    "runtime-version": "5.9",
+    "sdk": "org.kde.Sdk",
+    "command": "sauerbraten",
+    "modules": [
+        {
+            "name": "game",
+            "sources": [
+                {
+                    "type": "git",
+                    "path": "src",
+                    "commit": "17d79ca96f8ff9848c527979b90ec468f662f8c2"
+                }
+            ],
+            "buildsystem": "simple",
+            "build-commands": [
+                "make -C src install"
+            ]
+        },
+        {
+            "name": "share",
+            "sources": [
+                {
+                    "type": "file",
+                    "url": "http://quadropolis.us/files/sauerbratenicons.png",
+                    "sha256": "4fcd5c0d46f124e64cf92346f32cfc03fe6b239bca098e7909c84f1a58caa71e"
+                },
+                {
+                    "type": "dir",
+                    "path": "share/applications"
+                }
+            ],
+            "buildsystem": "simple",
+            "build-commands":[
+               "#mkdir -p files/share/applications",
+               "#install -D launcher.desktop sauerbratenicons.png files/share/applications/",
+               "#bash -c '(>&2 ls /app/ )'"
+            ]
+        }
+    ],
+    "rename-icon": "sauerbratenicons",
+    "rename-desktop-file": "launcher.desktop",
+    "finish-args": [
+        "--socket=x11",
+        "--socket=wayland",
+        "--share=network",
+        "--socket=pulseaudio"
+    ]
+}
+

setup-repo.sh

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+#!/bin/sh
+
+git submodule update --init --recursive

share/applications/launcher.desktop

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+[Desktop Entry]
+Name=Sauerbraten
+Exec=sauerbraten
+Comment=Cube2 Sauerbraten
+Icon=sauerbraten
+Type=Application
+Categories=Games;