(svn r25975) -Feature [FS#5385]: XDG base directory support

6 files changed, 122 insertions, 17 deletions

diff --git a/config.lib b/config.lib
index b9618f9bf..3fefc1c83 100644
--- a/config.lib
+++ b/config.lib
@@ -72,6 +72,7 @@ set_default() {
 	with_zlib="1"
 	with_lzma="1"
 	with_lzo2="1"
+	with_xdg_basedir="1"
 	with_png="1"
 	enable_builtin_depend="1"
 	with_makedepend="0"
@@ -145,6 +146,7 @@ set_default() {
 		with_zlib
 		with_lzma
 		with_lzo2
+		with_xdg_basedir
 		with_png
 		enable_builtin_depend
 		with_makedepend
@@ -347,6 +349,13 @@ detect_params() {
 			--without-liblzo2)            with_lzo2="0";;
 			--with-liblzo2=*)             with_lzo2="$optarg";;
 
+			--with-xdg-basedir)           with_xdg_basedir="2";;
+			--without-xdg-basedir)        with_xdg_basedir="0";;
+			--with-xdg-basedir=*)         with_xdg_basedir="$optarg";;
+			--with-libxdg-basedir)        with_xdg_basedir="2";;
+			--without-libxdg-basedir)     with_xdg_basedir="0";;
+			--with-libxdg-basedir=*)      with_xdg_basedir="$optarg";;
+
 			--with-png)                   with_png="2";;
 			--without-png)                with_png="0";;
 			--with-png=*)                 with_png="$optarg";;
@@ -818,6 +827,7 @@ check_params() {
 		fi
 	fi
 
+	detect_xdg_basedir
 	detect_png
 	detect_freetype
 	detect_fontconfig
@@ -1661,6 +1671,17 @@ make_cflags_and_ldflags() {
 		CFLAGS="$CFLAGS -DWITH_LZO"
 	fi
 
+	if [ -n "$xdg_basedir_config" ]; then
+		CFLAGS="$CFLAGS -DWITH_XDG_BASEDIR"
+		CFLAGS="$CFLAGS `$xdg_basedir_config --cflags | tr '\n\r' '  '`"
+
+		if [ "$enable_static" != "0" ]; then
+			LIBS="$LIBS `$xdg_basedir_config --libs --static | tr '\n\r' '  '`"
+		else
+			LIBS="$LIBS `$xdg_basedir_config --libs | tr '\n\r' '  '`"
+		fi
+	fi
+
 	# 64bit machines need -D_SQ64
 	if [ "$cpu_type" = "64" ] && [ "$enable_universal" = "0" ]; then
 		CFLAGS="$CFLAGS -D_SQ64"
@@ -2722,6 +2743,44 @@ detect_lzma() {
 	log 1 "checking liblzma... found"
 }
 
+detect_xdg_basedir() {
+	# 0 means no, 1 is auto-detect, 2 is force
+	if [ "$with_xdg_basedir" = "0" ]; then
+		log 1 "checking libxdg_basedir... disabled"
+
+		xdg_basedir_config=""
+		return 0
+	fi
+
+	if [ "$with_xdg_basedir" = "1" ] || [ "$with_xdg_basedir" = "" ] || [ "$with_xdg_basedir" = "2" ]; then
+		xdg_basedir_config="pkg-config libxdg-basedir"
+	else
+		xdg_basedir_config="$with_xdg_basedir"
+	fi
+
+	version=`$xdg_basedir_config --modversion 2>/dev/null`
+	ret=$?
+	log 2 "executing $xdg_basedir_config --modversion"
+	log 2 "  returned $version"
+	log 2 "  exit code $ret"
+
+	if [ -z "$version" ] || [ "$ret" != "0" ]; then
+		log 1 "checking libxdg_basedir... not found"
+
+		# It was forced, so it should be found.
+		if [ "$with_xdg_basedir" != "1" ]; then
+			log 1 "configure: error: pkg-config libxdg_basedir couldn't be found"
+			log 1 "configure: error: you supplied '$with_xdg_basedir', but it seems invalid"
+			exit 1
+		fi
+
+		xdg_basedir_config=""
+		return 0
+	fi
+
+	log 1 "checking libxdg_basedir... found"
+}
+
 detect_png() {
 	# 0 means no, 1 is auto-detect, 2 is force
 	if [ "$with_png" = "0" ]; then
@@ -3642,6 +3701,8 @@ showhelp() {
 	echo "                                 enables libfreetype support"
 	echo "  --with-fontconfig[=pkg-config fontconfig]"
 	echo "                                 enables fontconfig support"
+	echo "  --with-xdg-basedir[=pkg-config libxdg-basedir]"
+	echo "                                 enables fontconfig support"
 	echo "  --with-icu[=icu-config]        enables icu (used for right-to-left support)"
 	echo "  --static-icu                   try to link statically (libsicu instead of"
 	echo "                                 libicu; can fail as the new name is guessed)"
diff --git a/os/debian/control b/os/debian/control
index de22a807a..bfaa4cf3a 100644
--- a/os/debian/control
+++ b/os/debian/control
@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: Matthijs Kooijman <matthijs@stdin.nl>
 Uploaders: Jordi Mallach <jordi@debian.org>
 DM-Upload-Allowed: yes
-Build-Depends: debhelper (>= 7.0.50), libsdl-dev, zlib1g-dev, libpng-dev, libfreetype6-dev, libfontconfig-dev, libicu-dev, liblzma-dev, liblzo2-dev
+Build-Depends: debhelper (>= 7.0.50), libsdl-dev, zlib1g-dev, libpng-dev, libfreetype6-dev, libfontconfig-dev, libicu-dev, liblzma-dev, liblzo2-dev, libxdg-basedir-dev
 Standards-Version: 3.8.4
 Vcs-Browser: http://git.debian.org/?p=collab-maint/openttd.git
 Vcs-Git: git://git.debian.org/collab-maint/openttd.git
diff --git a/os/debian/rules b/os/debian/rules
index 97094b0c5..e2ae9db85 100755
--- a/os/debian/rules
+++ b/os/debian/rules
@@ -17,7 +17,7 @@ endif
 # to be explicit about the dependencies, in case we're not running in a
 # clean build root.
 override_dh_auto_configure:
-	./configure $(CROSS) --prefix-dir=/usr --install-dir=debian/openttd --without-allegro --with-zlib --with-sdl --with-png --with-freetype --with-fontconfig --with-icu --with-liblzo2 --with-lzma --without-iconv --disable-strip CFLAGS="$(CFLAGS) -g" LDFLAGS="$(LDFLAGS) -Wl,-as-needed"
+	./configure $(CROSS) --prefix-dir=/usr --install-dir=debian/openttd --without-allegro --with-zlib --with-sdl --with-png --with-freetype --with-fontconfig --with-icu --with-liblzo2 --with-lzma --with-xdg-basedir --without-iconv --disable-strip CFLAGS="$(CFLAGS) -g" LDFLAGS="$(LDFLAGS) -Wl,-as-needed"
 
 # Do some extra installation
 override_dh_auto_install:
diff --git a/readme.txt b/readme.txt
index efec00cf9..9ff003c66 100644
--- a/readme.txt
+++ b/readme.txt
@@ -282,7 +282,8 @@ your operating system:
 		         C:\Documents and Settings\<username>\My Documents\OpenTTD (2000, XP)
 		         C:\Users\<username>\Documents\OpenTTD (Vista, 7)
 		Mac OSX: ~/Documents/OpenTTD
-		Linux:   ~/.openttd
+		Linux:   $XDG_DATA_HOME/openttd which is usually ~/.local/share/openttd when
+		         built with XDG base directory support, otherwise ~/.openttd
 	3. The shared directory
 		Windows: C:\Documents and Settings\All Users\Shared Documents\OpenTTD (2000, XP)
 		         C:\Users\Public\Documents\OpenTTD (Vista, 7)
@@ -322,10 +323,13 @@ Notes:
 	  others.
 	- The previous search order is also used for NewGRFs and openttd.cfg.
 	- If openttd.cfg is not found, then it will be created using the 2, 4, 1, 3,
-	  5 order.
+	  5 order. When built with XDG base directory support, openttd.cfg will be
+	  created in $XDG_CONFIG_HOME/openttd which is usually ~/.config/openttd.
 	- Savegames will be relative to the config file only if there is no save/
 	  directory in paths with higher priority than the config file path, but
 	  autosaves and screenshots will always be relative to the config file.
+	  Unless the configuration file is in $XDG_CONFIG_HOME/openttd, then all
+	  other files will be saved under $XDG_DATA_HOME/openttd.
 
 The preferred setup:
 Place 3rd party files in shared directory (or in personal directory if you do
diff --git a/src/fileio.cpp b/src/fileio.cpp
index ef564aa92..6be2195f2 100644
--- a/src/fileio.cpp
+++ b/src/fileio.cpp
@@ -28,6 +28,10 @@
 #include <sys/stat.h>
 #include <algorithm>
 
+#ifdef WITH_XDG_BASEDIR
+#include "basedir.h"
+#endif
+
 /** Size of the #Fio data buffer. */
 #define FIO_BUFFER_SIZE 512
 
@@ -1071,6 +1075,12 @@ bool DoScanWorkingDirectory()
 void DetermineBasePaths(const char *exe)
 {
 	char tmp[MAX_PATH];
+#if defined(WITH_XDG_BASEDIR) && defined(WITH_PERSONAL_DIR)
+	snprintf(tmp, MAX_PATH, "%s" PATHSEP "%s", xdgDataHome(NULL),
+			PERSONAL_DIR[0] == '.' ? &PERSONAL_DIR[1] : PERSONAL_DIR);
+	AppendPathSeparator(tmp, MAX_PATH);
+	_searchpaths[SP_PERSONAL_DIR_XDG] = strdup(tmp);
+#endif
 #if defined(__MORPHOS__) || defined(__AMIGA__) || defined(DOS) || defined(OS2) || !defined(WITH_PERSONAL_DIR)
 	_searchpaths[SP_PERSONAL_DIR] = NULL;
 #else
@@ -1155,56 +1165,83 @@ void DeterminePaths(const char *exe)
 {
 	DetermineBasePaths(exe);
 
+#if defined(WITH_XDG_BASEDIR) && defined(WITH_PERSONAL_DIR)
+	char config_home[MAX_PATH];
+	snprintf(config_home, MAX_PATH, "%s" PATHSEP "%s", xdgConfigHome(NULL),
+			PERSONAL_DIR[0] == '.' ? &PERSONAL_DIR[1] : PERSONAL_DIR);
+	AppendPathSeparator(config_home, MAX_PATH);
+#endif
+
 	Searchpath sp;
 	FOR_ALL_SEARCHPATHS(sp) {
 		if (sp == SP_WORKING_DIR && !_do_scan_working_directory) continue;
 		DEBUG(misc, 4, "%s added as search path", _searchpaths[sp]);
 	}
 
+	char *config_dir;
 	if (_config_file != NULL) {
-		char *dir = strdup(_config_file);
-		char *end = strrchr(dir, PATHSEPCHAR);
+		config_dir = strdup(_config_file);
+		char *end = strrchr(config_dir, PATHSEPCHAR);
 		if (end == NULL) {
-			dir[0] = '\0';
+			config_dir[0] = '\0';
 		} else {
 			end[1] = '\0';
 		}
-		_personal_dir = dir;
 	} else {
 		char personal_dir[MAX_PATH];
 		if (FioFindFullPath(personal_dir, lengthof(personal_dir), BASE_DIR, "openttd.cfg") != NULL) {
 			char *end = strrchr(personal_dir, PATHSEPCHAR);
 			if (end != NULL) end[1] = '\0';
-			_personal_dir = strdup(personal_dir);
-			_config_file = str_fmt("%sopenttd.cfg", _personal_dir);
+			config_dir = strdup(personal_dir);
+			_config_file = str_fmt("%sopenttd.cfg", config_dir);
 		} else {
+#if defined(WITH_XDG_BASEDIR) && defined(WITH_PERSONAL_DIR)
+			/* No previous configuration file found. Use the configuration folder from XDG. */
+			config_dir = config_home;
+#else
 			static const Searchpath new_openttd_cfg_order[] = {
 					SP_PERSONAL_DIR, SP_BINARY_DIR, SP_WORKING_DIR, SP_SHARED_DIR, SP_INSTALLATION_DIR
 				};
 
 			for (uint i = 0; i < lengthof(new_openttd_cfg_order); i++) {
 				if (IsValidSearchPath(new_openttd_cfg_order[i])) {
-					_personal_dir = strdup(_searchpaths[new_openttd_cfg_order[i]]);
-					_config_file = str_fmt("%sopenttd.cfg", _personal_dir);
+					config_dir = strdup(_searchpaths[new_openttd_cfg_order[i]]);
 					break;
 				}
 			}
+#endif
+			_config_file = str_fmt("%sopenttd.cfg", config_dir);
 		}
 	}
 
-	DEBUG(misc, 3, "%s found as personal directory", _personal_dir);
+	DEBUG(misc, 3, "%s found as config directory", config_dir);
 
-	_highscore_file = str_fmt("%shs.dat", _personal_dir);
+	_highscore_file = str_fmt("%shs.dat", config_dir);
 	extern char *_hotkeys_file;
-	_hotkeys_file = str_fmt("%shotkeys.cfg", _personal_dir);
+	_hotkeys_file = str_fmt("%shotkeys.cfg", config_dir);
 	extern char *_windows_file;
-	_windows_file = str_fmt("%swindows.cfg", _personal_dir);
+	_windows_file = str_fmt("%swindows.cfg", config_dir);
+
+#if defined(WITH_XDG_BASEDIR) && defined(WITH_PERSONAL_DIR)
+	if (config_dir == config_home) {
+		/* We are using the XDG configuration home for the config file,
+		 * then store the rest in the XDG data home folder. */
+		_personal_dir = _searchpaths[SP_PERSONAL_DIR_XDG];
+		FioCreateDirectory(_personal_dir);
+	} else
+#endif
+	{
+		_personal_dir = config_dir;
+	}
 
 	/* Make the necessary folders */
 #if !defined(__MORPHOS__) && !defined(__AMIGA__) && defined(WITH_PERSONAL_DIR)
-	FioCreateDirectory(_personal_dir);
+	FioCreateDirectory(config_dir);
+	if (config_dir != _personal_dir) FioCreateDirectory(_personal_dir);
 #endif
 
+	DEBUG(misc, 3, "%s found as personal directory", _personal_dir);
+
 	static const Subdirectory default_subdirs[] = {
 		SAVE_DIR, AUTOSAVE_DIR, SCENARIO_DIR, HEIGHTMAP_DIR, BASESET_DIR, NEWGRF_DIR, AI_DIR, AI_LIBRARY_DIR, GAME_DIR, GAME_LIBRARY_DIR, SCREENSHOT_DIR
 	};
diff --git a/src/fileio_type.h b/src/fileio_type.h
index 3f21be6dd..87cb2d1a8 100644
--- a/src/fileio_type.h
+++ b/src/fileio_type.h
@@ -43,6 +43,9 @@ enum Subdirectory {
 enum Searchpath {
 	SP_FIRST_DIR,
 	SP_WORKING_DIR = SP_FIRST_DIR, ///< Search in the working directory
+#if defined(WITH_XDG_BASEDIR) && defined(WITH_PERSONAL_DIR)
+	SP_PERSONAL_DIR_XDG,           ///< Search in the personal directory from the XDG specification
+#endif
 	SP_PERSONAL_DIR,               ///< Search in the personal directory
 	SP_SHARED_DIR,                 ///< Search in the shared directory, like 'Shared Files' under Windows
 	SP_BINARY_DIR,                 ///< Search in the directory where the binary resides