Detect native-Linux Stardew Valley, default executables to no-Proton

Add IPluginGame::isNativeLinux() (virtual, default false) so a plugin
can advertise that the discovered installation is a native Linux build.
Bound through the Python plugin trampoline so basic_games subclasses can
override it.

Stardew Valley plugin: when the install dir contains the StardewValley
launcher script and no Stardew Valley.exe, report isNativeLinux=true and
return Linux-side binary names (StardewValley, StardewModdingAPI). Also
fix GameDataPath to "Mods" — Linux ships the SMAPI mods dir with a
capital M.

ExecutablesList::getPluginExecutables: skip the UseProton flag when the
plugin reports native Linux, so the spawn path falls into launchDirect()
and the game runs without a Wine prefix.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/src/executableslist.cpp b/src/src/executableslist.cpp
index f12a74c..459d25c 100644
--- a/src/src/executableslist.cpp
+++ b/src/src/executableslist.cpp
@@ -150,12 +150,21 @@ ExecutablesList::getPluginExecutables(MOBase::IPluginGame const* game) const
 

   std::vector<Executable> v;

 

+  // Native Linux installs (e.g. native Stardew Valley) launch directly without

+  // Proton.  Their executables default to UseProton=false so the user doesn't

+  // have to flip every entry by hand after instance creation.

+  const bool nativeLinux = game->isNativeLinux();

+

   for (const ExecutableInfo& info : game->executables()) {

     if (!info.isValid()) {

       continue;

     }

 

-    v.push_back({info, Executable::UseApplicationIcon | Executable::UseProton});

+    Executable::Flags flags = Executable::UseApplicationIcon;

+    if (!nativeLinux) {

+      flags |= Executable::UseProton;

+    }

+    v.push_back({info, flags});

   }

 

   const QFileInfo eppBin(QCoreApplication::applicationDirPath() +