103 lines
2.9 KiB
C++
103 lines
2.9 KiB
C++
/*
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* Copyright (C) 2018 James Turner
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* Copyright (C) 2018 Edward d'Auvergne
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*
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* This file is part of the program FlightGear.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <iostream>
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#include "config.h"
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#include "dataStore.hxx"
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// Sanity check.
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bool looksLikeFGData(const SGPath& path)
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{
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return (path / "defaults.xml").exists();
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}
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// Set up the path to FGData.
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int DataStore::findFGRoot(const std::string& fgRootCmdLineOpt, bool debug)
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{
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SGPath fgRoot;
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// Command line supplied path.
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if (!fgRootCmdLineOpt.empty()) {
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fgRoot = SGPath::fromUtf8(fgRootCmdLineOpt);
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if (looksLikeFGData(fgRoot)) {
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if (debug)
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std::cerr << "FGdata from the command line: " << fgRoot << std::endl;
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_fgRootPath = fgRoot;
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return 0;
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// Fail if an invalid path is supplied.
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} else {
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std::cerr << "The supplied path \"" << fgRootCmdLineOpt << "\" is not a valid FGData path." << std::endl;
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return 1;
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}
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}
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// The FG_DATA_DIR CMake option.
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fgRoot = SGPath::fromUtf8(PKGLIBDIR);
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if (looksLikeFGData(fgRoot)) {
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if (debug)
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std::cerr << "FGdata found via $PKGLIBDIR: " << fgRoot << std::endl;
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_fgRootPath = fgRoot;
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return 0;
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}
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// The FG_ROOT environmental variable.
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if (std::getenv("FG_ROOT")) {
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fgRoot = SGPath::fromEnv("FG_ROOT");
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if (looksLikeFGData(fgRoot)) {
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if (debug)
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std::cerr << "FGdata found via $FG_ROOT: " << fgRoot << std::endl;
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_fgRootPath = fgRoot;
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return 0;
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}
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}
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// Try in ../fgdata.
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fgRoot = SGPath::fromUtf8(FGSRCDIR) / ".." / "fgdata";
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if (looksLikeFGData(fgRoot)) {
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if (debug)
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std::cerr << "FGdata found at \"$FGSRCDIR/../fgdata\": " << fgRoot << std::endl;
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_fgRootPath = fgRoot;
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return 0;
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}
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// Try in ../data.
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fgRoot = SGPath::fromUtf8(FGSRCDIR) / ".." / "data";
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if (looksLikeFGData(fgRoot)) {
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if (debug)
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std::cerr << "FGdata found at \"$FGSRCDIR/../data\": " << std::endl;
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_fgRootPath = fgRoot;
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return 0;
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}
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// No FGData.
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std::cerr << "FGData not found." << std::endl;
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return 1;
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}
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// Get the path to FGData.
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SGPath DataStore::getFGRoot()
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{
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return _fgRootPath;
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}
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