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forked from 0ad/0ad
0ad/source/ps/GameSetup/Paths.cpp

104 lines
3.0 KiB
C++

/* Copyright (C) 2009 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. 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, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "Paths.h"
#include "lib/path_util.h"
#include "lib/utf8.h"
#include "lib/sysdep/filesystem.h" // wrealpath
#include "lib/sysdep/sysdep.h" // sys_get_executable_name
#if OS_WIN
# include "lib/sysdep/os/win/wutil.h" // wutil_AppdataPath
#endif
Paths::Paths(const CmdLineArgs& args)
{
m_root = Root(wstring_from_utf8(args.GetArg0()));
m_rdata = m_root/L"data/";
const wchar_t* subdirectoryName = args.Has("writableRoot")? 0 : L"0ad";
// everything is a subdirectory of the root
if(!subdirectoryName)
{
m_data = m_rdata;
m_config = m_data/L"config/";
m_cache = m_data/L"cache/";
m_logs = m_root/L"logs/";
}
else
{
#if OS_WIN
const fs::wpath appdata = AddSlash(wutil_AppdataPath()/subdirectoryName);
m_data = appdata/L"data/";
m_config = appdata/L"config/";
m_cache = appdata/L"cache/";
m_logs = appdata/L"logs/";
#else
const char* envHome = getenv("HOME");
debug_assert(envHome);
const fs::wpath home(wstring_from_utf8(envHome));
const fs::wpath xdgData = XDG_Path("XDG_DATA_HOME", home, home/L".local/share/")/subdirectoryName;
const fs::wpath xdgConfig = XDG_Path("XDG_CONFIG_HOME", home, home/L".config/")/subdirectoryName;
const fs::wpath xdgCache = XDG_Path("XDG_CACHE_HOME", home, home/L".cache/")/subdirectoryName;
m_data = AddSlash(xdgData);
m_cache = AddSlash(xdgCache);
m_config = AddSlash(xdgConfig/L"config");
m_logs = AddSlash(xdgConfig/L"logs");
#endif
}
}
/*static*/ fs::wpath Paths::Root(const std::wstring& argv0)
{
// get full path to executable
fs::wpath pathname;
// .. first try safe, but system-dependent version
if(sys_get_executable_name(pathname) != INFO::OK)
{
// .. failed; use argv[0]
wchar_t pathname_buf[PATH_MAX];
errno = 0;
if(!wrealpath(argv0.c_str(), pathname_buf))
WARN_ERR(LibError_from_errno(false));
pathname = pathname_buf;
}
// make sure it's valid
if(!fs::exists(pathname))
WARN_ERR(LibError_from_errno(false));
for(size_t i = 0; i < 3; i++) // remove "system/name.exe"
pathname.remove_leaf();
return pathname;
}
/*static*/ fs::wpath Paths::XDG_Path(const char* envname, const fs::wpath& home, const fs::wpath& defaultPath)
{
const char* path = getenv(envname);
if(path)
{
if(path[0] != '/') // relative to $HOME
return AddSlash(home/wstring_from_utf8(path));
return AddSlash(fs::wpath(wstring_from_utf8(path)));
}
return AddSlash(defaultPath);
}