partial linux setup/install scripting

Launcher/WiiCompiled.Setup.Linux/DesktopEntry.cs

@@ -0,0 +1,40 @@
+namespace WiiCompiled.Setup.Linux;
+
+/// <summary>
+/// freedesktop.org .desktop application-menu entries. Replaces ShellIntegration.cs's registry
+/// uninstall entry (no Linux analogue for an unpackaged tool - Windows already skips that step for
+/// portable installs, this just applies that same behavior universally) and .lnk shortcuts.
+/// </summary>
+internal static class DesktopEntry
+{
+    private static string ApplicationsDirectory =>
+        Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "applications");
+
+    private static string PathFor(string profile) =>
+        Path.Combine(ApplicationsDirectory, $"wiicompiled-{profile}.desktop");
+
+    public static void Create(string profile, string displayName, string exePath)
+    {
+        // exePath is the installed native runtime binary itself (e.g.
+        // .../Install/Base/WiiCompiled) - each profile already gets its own .desktop file here,
+        // so there is no need to route through the setup tool's own launch-base/launch-retro
+        // subcommand dispatch first. Unquoted: the Desktop Entry spec's Exec grammar doesn't take
+        // a bare '"'-wrapped path, and none is needed here anyway - the only part of this path
+        // that varies is the username, which Unix forbids containing whitespace.
+        Directory.CreateDirectory(ApplicationsDirectory);
+        var contents =
+            "[Desktop Entry]\n" +
+            "Type=Application\n" +
+            $"Name={displayName}\n" +
+            $"Exec={exePath}\n" +
+            "Categories=Game;\n" +
+            "Terminal=false\n";
+        File.WriteAllText(PathFor(profile), contents);
+    }
+
+    public static void Remove(string profile)
+    {
+        var path = PathFor(profile);
+        if (File.Exists(path)) File.Delete(path);
+    }
+}