change: remove Flatpak option if binary is not installed

dzgui/api/steam.py

@@ -13,6 +13,7 @@ from warnings import deprecated
 
 from dzgui.api.acf import ACF
 from dzgui.init.prereqs import has_any_client
+from dzgui.init.proc import has_cmd
 from dzgui.const.constants import (
     APPID_DAYZ,
     APPID_DAYZ_EXP,
@@ -22,6 +23,7 @@ from dzgui.const.constants import (
     DEBIAN_STEAM_PATH,
     DEFAULT_STEAM_PATH,
     DOWNLOADS_PATH,
+    FLATPAK_CMD,
     FLATPAK_STEAM_PATH,
     LIBRARYFOLDERS_PATH,
     UBUNTU_STEAM_PATH,
@@ -82,6 +84,8 @@ def get_steam_paths() -> list[tuple[Path, str]]:
         }
 
         for path in DEFAULT_PATH, FLATPAK_PATH, UBUNTU_PATH, DEBIAN_PATH:
+            if path is FLATPAK_PATH and has_cmd(FLATPAK_CMD) is False:
+                continue
             if path.joinpath(VDF_PATH).is_file():
                 paths.append((path, human[path]))
     return paths