Move #include <filesystem> in its own file to be consistent with ex…

…perimental support...

Use `fs::` instead of `std::filesystem`

CMakeLists.txt

@@ -551,6 +551,7 @@ set(stratagus_generic_HDRS
 	src/include/depend.h
 	src/include/editor.h
 	src/include/online_service.h
+	src/include/filesystem.h
 	src/include/font.h
 	src/include/fov.h
 	src/include/fow.h

src/include/filesystem.h

@@ -0,0 +1,51 @@
+//       _________ __                 __
+//      /   _____//  |_____________ _/  |______     ____  __ __  ______
+//      \_____  \\   __\_  __ \__  \\   __\__  \   / ___\|  |  \/  ___/
+//      /        \|  |  |  | \// __ \|  |  / __ \_/ /_/  >  |  /\___ |
+//     /_______  /|__|  |__|  (____  /__| (____  /\___  /|____//____  >
+//             \/                  \/          \//_____/            \/
+//  ______________________                           ______________________
+//                        T H E   W A R   B E G I N S
+//         Stratagus - A free fantasy real time strategy game engine
+//
+/**@name filesystem - filesystem header selection. */
+//
+//      (c) Copyright 1998-2023 by Lutz Sammer, Jimmy Salmon and Joris Dauphin.
+//
+//      This program is free software; you can redistribute it and/or modify
+//      it under the terms of the GNU General Public License as published by
+//      the Free Software Foundation; only version 2 of the License.
+//
+//      This program is distributed in the hope that it will be useful,
+//      but WITHOUT ANY WARRANTY; without even the implied warranty of
+//      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//      GNU General Public License for more details.
+//
+//      You should have received a copy of the GNU General Public License
+//      along with this program; if not, write to the Free Software
+//      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+//      02111-1307, USA.
+//
+
+#ifndef __FILESYSTEM_H__
+#define __FILESYSTEM_H__
+
+//@{
+
+/*----------------------------------------------------------------------------
+--  Includes
+----------------------------------------------------------------------------*/
+
+#if __has_include(<filesystem>)
+# include <filesystem>
+namespace fs = std::filesystem;
+#elif __has_include(<experimental/filesystem>)
+# include <experimental/filesystem>
+namespace fs = std::experimental::filesystem;
+#else
+error "Missing the <filesystem> header."
+#endif
+
+//@}
+
+#endif /* __FILESYSTEM_H__ */

src/include/iolib.h

@@ -37,6 +37,7 @@
 ----------------------------------------------------------------------------*/
 
 #include <vector>
+#include "filesystem.h"
 #include "SDL.h"
 
 /*----------------------------------------------------------------------------

src/include/util.h

@@ -32,15 +32,7 @@
 
 //@{
 
-#if __has_include(<filesystem>)
-#include <filesystem>
-namespace fs = std::filesystem;
-#elif __has_include(<experimental/filesystem>)
-#include <experimental/filesystem>
-namespace fs = std::experimental::filesystem;
-#else
-error "Missing the <filesystem> header."
-#endif
+#include "filesystem.h"
 
 #include <cstdlib>
 #include <cstdint>

src/network/netconnect.cpp

@@ -42,16 +42,8 @@
 #include <array>
 #include <utility>
 #include <random>
-#if __has_include(<filesystem>)
-#include <filesystem>
-namespace fs = std::filesystem;
-#elif __has_include(<experimental/filesystem>)
-#include <experimental/filesystem>
-namespace fs = std::experimental::filesystem;
-#else
-error "Missing the <filesystem> header."
-#endif
 
+#include "filesystem.h"
 #include "game.h"
 #include "online_service.h"
 #include "stratagus.h"

src/stratagus/iolib.cpp

@@ -692,13 +692,13 @@ std::vector<FileList> ReadDataDirectory(const fs::path& directory)
 {
 	std::vector<FileList> files;
 
-	for (auto it = std::filesystem::directory_iterator{directory};
-	     it != std::filesystem::directory_iterator{};
+	for (auto it = fs::directory_iterator{directory};
+	     it != fs::directory_iterator{};
 	     ++it) {
-		if (std::filesystem::is_directory(it->path())) {
+		if (fs::is_directory(it->path())) {
 			files.emplace_back();
 			files.back().name = it->path().filename().string();
-		} else if (std::filesystem::is_regular_file(it->path())) {
+		} else if (fs::is_regular_file(it->path())) {
 			files.emplace_back();
 			files.back().name = it->path().filename().string();
 			files.back().type = 1;

src/stratagus/parameters.cpp

@@ -31,13 +31,13 @@
 
 #include "stratagus.h"
 
+#include "filesystem.h"
 #include "parameters.h"
 
 #include <stdlib.h>
 
 #ifdef USE_WIN32
 #include <Shlobj.h>
-#include <filesystem>
 #endif
 
 /* static */ Parameters Parameters::Instance;
@@ -59,7 +59,7 @@ void Parameters::SetDefaultUserDirectory(bool noPortable)
 	if (!noPortable) {
 		// if launcher is in the same directory as the data, we are in a portable install
 		fs::path executable_path = GetExecutablePath();
-		if (std::filesystem::equivalent(std::filesystem::path(StratagusLibPath), executable_path.parent_path())) {
+		if (fs::equivalent(fs::path(StratagusLibPath), executable_path.parent_path())) {
 			userDirectory = StratagusLibPath;
 			return;
 		}

src/stratagus/script.cpp

@@ -33,23 +33,14 @@
 --  Includes
 ----------------------------------------------------------------------------*/
 
-#if __has_include(<filesystem>)
-#include <filesystem>
-namespace fs = std::filesystem;
-#elif __has_include(<experimental/filesystem>)
-#include <experimental/filesystem>
-namespace fs = std::experimental::filesystem;
-#else
-error "Missing the <filesystem> header."
-#endif
+#include "script.h"
 
 #include <signal.h>
 
 #include "stratagus.h"
 
-#include "script.h"
-
 #include "animation/animation_setplayervar.h"
+#include "filesystem.h"
 #include "font.h"
 #include "game.h"
 #include "iolib.h"