cataclysm-dda{,-git}: fix locale directory

PREFIX/share/locale should be searched for translations not only on Linux.

pkgs/games/cataclysm-dda/default.nix

@@ -18,6 +18,8 @@ stdenv.mkDerivation rec {
   buildInputs = [ ncurses lua SDL2 SDL2_image SDL2_ttf SDL2_mixer freetype gettext ]
     ++ stdenv.lib.optionals stdenv.isDarwin [ Cocoa ];
 
+  patches = [ ./patches/fix_locale_dir.patch ];
+
   postPatch = ''
     patchShebangs .
     sed -i Makefile \

pkgs/games/cataclysm-dda/git.nix

@@ -17,6 +17,8 @@ stdenv.mkDerivation rec {
   buildInputs = [ ncurses lua SDL2 SDL2_image SDL2_ttf SDL2_mixer freetype gettext ]
     ++ stdenv.lib.optionals stdenv.isDarwin [ CoreFoundation Cocoa ];
 
+  patches = [ ./patches/fix_locale_dir_git.patch ];
+
   postPatch = ''
     patchShebangs .
     sed -i Makefile \

pkgs/games/cataclysm-dda/patches/fix_locale_dir.patch

@@ -0,0 +1,20 @@
+diff --git a/src/translations.cpp b/src/translations.cpp
+index 6520cfe..49f7b2c 100644
+--- a/src/translations.cpp
++++ b/src/translations.cpp
+@@ -72,15 +72,11 @@ void set_language(bool reload_options)
+ 
+     // Step 2. Bind to gettext domain.
+     const char *locale_dir;
+-#ifdef __linux__
+     if (!FILENAMES["base_path"].empty()) {
+         locale_dir = std::string(FILENAMES["base_path"] + "share/locale").c_str();
+     } else {
+         locale_dir = "lang/mo";
+     }
+-#else
+-    locale_dir = "lang/mo";
+-#endif // __linux__
+ 
+     bindtextdomain("cataclysm-dda", locale_dir);
+     bind_textdomain_codeset("cataclysm-dda", "UTF-8");

pkgs/games/cataclysm-dda/patches/fix_locale_dir_git.patch

@@ -0,0 +1,20 @@
+diff --git a/src/translations.cpp b/src/translations.cpp
+index 3a86291..e6c5f84 100644
+--- a/src/translations.cpp
++++ b/src/translations.cpp
+@@ -176,15 +176,11 @@ void set_language()
+ 
+     // Step 2. Bind to gettext domain.
+     std::string locale_dir;
+-#if (defined __linux__ || (defined MACOSX && !defined TILES))
+     if( !FILENAMES["base_path"].empty() ) {
+         locale_dir = FILENAMES["base_path"] + "share/locale";
+     } else {
+         locale_dir = "lang/mo";
+     }
+-#else
+-    locale_dir = "lang/mo";
+-#endif // __linux__
+ 
+     const char *locale_dir_char = locale_dir.c_str();
+     bindtextdomain( "cataclysm-dda", locale_dir_char );