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//
// Copyright 2010 Ettus Research LLC
//
// 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, either version 3 of the License, or
// (at your option) any later version.
//
// 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, see <http://www.gnu.org/licenses/>.
//
#include "constants.hpp"
#include <uhd/config.hpp>
#include <uhd/utils/algorithm.hpp>
#include <boost/program_options.hpp>
#include <boost/filesystem.hpp>
#include <boost/foreach.hpp>
#include <boost/bind.hpp>
#include <stdexcept>
#include <string>
#include <vector>
namespace po = boost::program_options;
namespace fs = boost::filesystem;
/***********************************************************************
* Determine the paths separator
**********************************************************************/
#ifdef UHD_PLATFORM_WIN32
static const std::string env_path_sep = ";";
#else
static const std::string env_path_sep = ":";
#endif /*UHD_PLATFORM_WIN32*/
/***********************************************************************
* Get a list of paths for an environment variable
**********************************************************************/
static std::string name_mapper(const std::string &key, const std::string &var_name){
return (var_name == key)? var_name : "";
}
static std::vector<fs::path> get_env_paths(const std::string &var_name){
//register the options
std::string var_value;
po::options_description desc;
desc.add_options()
(var_name.c_str(), po::value<std::string>(&var_value)->default_value(""))
;
//parse environment variables
po::variables_map vm;
po::store(po::parse_environment(desc, boost::bind(&name_mapper, var_name, _1)), vm);
po::notify(vm);
//convert to filesystem path, filter blank paths
std::vector<fs::path> paths;
BOOST_FOREACH(const std::string &path_string, std::split_string(var_value, env_path_sep)){
if (path_string.empty()) continue;
paths.push_back(fs::system_complete(path_string));
}
return paths;
}
/***********************************************************************
* Get a list of special purpose paths
**********************************************************************/
std::vector<fs::path> get_image_paths(void){
std::vector<fs::path> paths = get_env_paths("UHD_IMAGE_PATH");
paths.push_back(fs::path(FULL_PKG_DATA_DIR) / "images");
return paths;
}
std::vector<fs::path> get_module_paths(void){
std::vector<fs::path> paths = get_env_paths("UHD_MODULE_PATH");
paths.push_back(fs::path(FULL_PKG_DATA_DIR) / "modules");
return paths;
}
/***********************************************************************
* Find a image in the image paths
**********************************************************************/
std::string find_image_path(const std::string &image_name){
if (fs::exists(image_name)){
return fs::system_complete(image_name).file_string();
}
BOOST_FOREACH(const fs::path &path, get_image_paths()){
fs::path image_path = path / image_name;
if (fs::exists(image_path)) return image_path.file_string();
}
throw std::runtime_error("Could not find path for image: " + image_name);
}
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