dwarf-fortress: supports darwin

pkgs/games/dwarf-fortress/wrapper/default.nix

@@ -47,6 +47,8 @@ stdenv.mkDerivation rec {
     name = "dwarf-fortress-init";
     src = ./dwarf-fortress-init.in;
     inherit env;
+    exe = if stdenv.isLinux then "libs/Dwarf_Fortress"
+                             else "dwarfort.exe";
   };
 
   runDF = ./dwarf-fortress.in;

pkgs/games/dwarf-fortress/wrapper/dwarf-fortress-init.in

@@ -2,6 +2,7 @@ shopt -s extglob
 
 [ -z "$DF_DIR" ] && DF_DIR="${XDG_DATA_HOME:-$HOME/.local/share}/df_linux"
 env_dir="@env@"
+exe="$env_dir/@exe@"
 
 update_path() {
   local path="$1"

pkgs/games/dwarf-fortress/wrapper/dwarf-fortress.in

@@ -2,5 +2,8 @@
 
 source @dfInit@
 
+export DYLD_LIBRARY_PATH="$env_dir/libs"
+export DYLD_FRAMEWORK_PATH="$env_dir/libs"
+
 cd "$DF_DIR"
-exec "$env_dir/libs/Dwarf_Fortress" "$@"
+exec "$exe" "$@"