preprocessor/src/Configuration.cc

825 lines
30 KiB
C++

/*
* Copyright © 2010-2023 Dynare Team
*
* This file is part of Dynare.
*
* Dynare 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.
*
* Dynare 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 Dynare. If not, see <https://www.gnu.org/licenses/>.
*/
#include <fstream>
#include <iostream>
#include <utility>
#ifdef _WIN32
# include <shlobj.h>
#endif
#include "Configuration.hh"
#include "DataTree.hh" // For strsplit()
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wold-style-cast"
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/trim.hpp>
#include <boost/tokenizer.hpp>
#pragma GCC diagnostic pop
Configuration::Path::Path(vector<string> includepath_arg)
{
if (includepath_arg.empty())
{
cerr << "ERROR: The Path must have an Include argument." << endl;
exit(EXIT_FAILURE);
}
paths["include"] = move(includepath_arg);
}
Configuration::FollowerNode::FollowerNode(string computerName_arg, string port_arg,
int minCpuNbr_arg, int maxCpuNbr_arg, string userName_arg,
string password_arg, string remoteDrive_arg,
string remoteDirectory_arg, string programPath_arg,
string programConfig_arg, string matlabOctavePath_arg,
bool singleCompThread_arg, int numberOfThreadsPerJob_arg,
string operatingSystem_arg) :
computerName {move(computerName_arg)},
port {move(port_arg)},
minCpuNbr {minCpuNbr_arg},
maxCpuNbr {maxCpuNbr_arg},
userName {move(userName_arg)},
password {move(password_arg)},
remoteDrive {move(remoteDrive_arg)},
remoteDirectory {move(remoteDirectory_arg)},
programPath {move(programPath_arg)},
programConfig {move(programConfig_arg)},
matlabOctavePath {move(matlabOctavePath_arg)},
singleCompThread {singleCompThread_arg},
numberOfThreadsPerJob {numberOfThreadsPerJob_arg},
operatingSystem {move(operatingSystem_arg)}
{
if (computerName.empty())
{
cerr << "ERROR: The node must have a ComputerName." << endl;
exit(EXIT_FAILURE);
}
if (!operatingSystem.empty())
if (operatingSystem != "windows" && operatingSystem != "unix")
{
cerr << "ERROR: The OperatingSystem must be either 'unix' or 'windows' (Case Sensitive)."
<< endl;
exit(EXIT_FAILURE);
}
}
Configuration::Cluster::Cluster(member_nodes_t member_nodes_arg) :
member_nodes {move(member_nodes_arg)}
{
if (member_nodes.empty())
{
cerr << "ERROR: The cluster must have at least one member node." << endl;
exit(EXIT_FAILURE);
}
}
Configuration::Configuration(bool parallel_arg, bool parallel_test_arg,
bool parallel_follower_open_mode_arg, bool parallel_use_psexec_arg,
string cluster_name_arg) :
parallel {parallel_arg},
parallel_test {parallel_test_arg},
parallel_follower_open_mode {parallel_follower_open_mode_arg},
parallel_use_psexec {parallel_use_psexec_arg},
cluster_name {move(cluster_name_arg)}
{
}
void
Configuration::getConfigFileInfo(const filesystem::path& conffile_option,
WarningConsolidation& warnings)
{
using namespace boost;
filesystem::path config_file {conffile_option};
if (config_file.empty())
{
config_file = findConfigFile("dynare.ini");
if (config_file.empty()) // Try old default location (Dynare ⩽ 5) for backward compatibility
{
filesystem::path old_default_config_file;
#ifdef _WIN32
array<wchar_t, MAX_PATH + 1> appdata;
if (SHGetFolderPathW(nullptr, CSIDL_APPDATA | CSIDL_FLAG_DONT_VERIFY, nullptr,
SHGFP_TYPE_CURRENT, appdata.data())
== S_OK)
old_default_config_file = filesystem::path {appdata.data()} / "dynare.ini";
#else
if (auto home = getenv("HOME"); home)
old_default_config_file = filesystem::path {home} / ".dynare";
#endif
if (!old_default_config_file.empty() && exists(old_default_config_file))
{
warnings << "WARNING: the location " << old_default_config_file.string()
<< " for the configuration file is obsolete; please see the reference"
<< " manual for the new location." << endl;
config_file = old_default_config_file;
}
}
}
if (config_file.empty())
{
if (parallel || parallel_test)
{
cerr << "ERROR: the parallel or parallel_test option was passed but no configuration "
<< "file was found" << endl;
exit(EXIT_FAILURE);
}
else
return;
}
ifstream configFile;
configFile.open(config_file, fstream::in);
if (!configFile.is_open())
{
cerr << "ERROR: Couldn't open configuration file " << config_file.string() << endl;
exit(EXIT_FAILURE);
}
string name, computerName, port, userName, password, remoteDrive, remoteDirectory, programPath,
programConfig, matlabOctavePath, operatingSystem;
vector<string> includepath;
int minCpuNbr {0}, maxCpuNbr {0};
int numberOfThreadsPerJob {1};
bool singleCompThread {false};
member_nodes_t member_nodes;
bool inHooks {false}, inNode {false}, inCluster {false}, inPaths {false};
while (configFile.good())
{
string line;
getline(configFile, line);
trim(line);
if (line.empty() || !line.compare(0, 1, "#"))
continue;
if (line == "[node]" || line == "[cluster]" || line == "[hooks]" || line == "[paths]")
{
if (!includepath.empty())
// we were just in [paths]
addPathsConfFileElement(includepath);
else
// we were just in [node] or [cluster]
addParallelConfFileElement(
inNode, inCluster, member_nodes, name, computerName, port, minCpuNbr, maxCpuNbr,
userName, password, remoteDrive, remoteDirectory, programPath, programConfig,
matlabOctavePath, singleCompThread, numberOfThreadsPerJob, operatingSystem);
//! Reset communication vars / option defaults
if (line == "[hooks]")
{
inHooks = true;
inNode = false;
inCluster = false;
inPaths = false;
}
else if (line == "[node]")
{
inHooks = false;
inNode = true;
inCluster = false;
inPaths = false;
}
else if (line == "[paths]")
{
inHooks = false;
inNode = false;
inCluster = false;
inPaths = true;
}
else
{
inHooks = false;
inNode = false;
inCluster = true;
inPaths = false;
}
name = userName = computerName = port = password = remoteDrive = remoteDirectory
= programPath = programConfig = matlabOctavePath = operatingSystem = "";
includepath.clear();
minCpuNbr = maxCpuNbr = 0;
numberOfThreadsPerJob = 1;
singleCompThread = false;
member_nodes.clear();
}
else
{
vector<string> tokenizedLine;
split(tokenizedLine, line, is_any_of("="));
if (tokenizedLine.size() != 2)
{
cerr << "ERROR (in config file): Options should be formatted as 'option = value'."
<< endl;
exit(EXIT_FAILURE);
}
trim(tokenizedLine.front());
trim(tokenizedLine.back());
if (inHooks)
if (tokenizedLine.front() == "GlobalInitFile")
if (global_init_file.empty())
global_init_file = tokenizedLine.back();
else
{
cerr
<< "ERROR: May not have more than one GlobalInitFile option in [hooks] block."
<< endl;
exit(EXIT_FAILURE);
}
else
{
cerr << "ERROR: Unrecognized option " << tokenizedLine.front()
<< " in [hooks] block." << endl;
exit(EXIT_FAILURE);
}
else if (inPaths)
if (tokenizedLine.front() == "Include")
if (includepath.empty())
{
vector<string> tokenizedPath;
split(tokenizedPath, tokenizedLine.back(), is_any_of(":"), token_compress_on);
for (auto& it : tokenizedPath)
if (!it.empty())
{
trim(it);
includepath.push_back(it);
}
}
else
{
cerr << "ERROR: May not have more than one Include option in [paths] block."
<< endl;
exit(EXIT_FAILURE);
}
else
{
cerr << "ERROR: Unrecognized option " << tokenizedLine.front()
<< " in [paths] block." << endl;
exit(EXIT_FAILURE);
}
else if (tokenizedLine.front() == "Name")
name = tokenizedLine.back();
else if (tokenizedLine.front() == "CPUnbr")
{
vector<string> tokenizedCpuNbr;
split(tokenizedCpuNbr, tokenizedLine.back(), is_any_of(":"));
try
{
if (tokenizedCpuNbr.size() == 1)
{
minCpuNbr = 1;
maxCpuNbr = stoi(tokenizedCpuNbr.front());
}
else if (tokenizedCpuNbr.size() == 2 && tokenizedCpuNbr[0].at(0) == '['
&& tokenizedCpuNbr[1].at(tokenizedCpuNbr[1].size() - 1) == ']')
{
tokenizedCpuNbr[0].erase(0, 1);
tokenizedCpuNbr[1].erase(tokenizedCpuNbr[1].size() - 1, 1);
minCpuNbr = stoi(tokenizedCpuNbr[0]);
maxCpuNbr = stoi(tokenizedCpuNbr[1]);
}
}
catch (const invalid_argument&)
{
cerr << "ERROR: Could not convert value to integer for CPUnbr." << endl;
exit(EXIT_FAILURE);
}
if (minCpuNbr <= 0 || maxCpuNbr <= 0)
{
cerr << "ERROR: Syntax for the CPUnbr option is as follows:" << endl
<< " 1) CPUnbr = <int>" << endl
<< " or 2) CPUnbr = [<int>:<int>]" << endl
<< " where <int> is an Integer > 0." << endl;
exit(EXIT_FAILURE);
}
minCpuNbr--;
maxCpuNbr--;
if (minCpuNbr > maxCpuNbr)
{
int tmp = maxCpuNbr;
maxCpuNbr = minCpuNbr;
minCpuNbr = tmp;
}
}
else if (tokenizedLine.front() == "Port")
port = tokenizedLine.back();
else if (tokenizedLine.front() == "ComputerName")
computerName = tokenizedLine.back();
else if (tokenizedLine.front() == "UserName")
userName = tokenizedLine.back();
else if (tokenizedLine.front() == "Password")
password = tokenizedLine.back();
else if (tokenizedLine.front() == "RemoteDrive")
remoteDrive = tokenizedLine.back();
else if (tokenizedLine.front() == "RemoteDirectory")
remoteDirectory = tokenizedLine.back();
else if (tokenizedLine.front() == "DynarePath" || tokenizedLine.front() == "ProgramPath")
programPath = tokenizedLine.back();
else if (tokenizedLine.front() == "ProgramConfig")
programConfig = tokenizedLine.back();
else if (tokenizedLine.front() == "MatlabOctavePath")
matlabOctavePath = tokenizedLine.back();
else if (tokenizedLine.front() == "NumberOfThreadsPerJob")
numberOfThreadsPerJob = stoi(tokenizedLine.back());
else if (tokenizedLine.front() == "SingleCompThread")
if (tokenizedLine.back() == "true")
singleCompThread = true;
else if (tokenizedLine.back() == "false")
singleCompThread = false;
else
{
cerr << "ERROR (in config file): The value passed to SingleCompThread may only be "
"'true' or 'false'."
<< endl;
exit(EXIT_FAILURE);
}
else if (tokenizedLine.front() == "OperatingSystem")
operatingSystem = tokenizedLine.back();
else if (tokenizedLine.front() == "Members")
{
char_separator sep(" ,;", "()", drop_empty_tokens);
tokenizer tokens(tokenizedLine.back(), sep);
string node_name;
for (bool begin_weight {false}; const auto& token : tokens)
{
if (token == "(")
{
begin_weight = true;
continue;
}
else if (token == ")")
{
node_name.clear();
begin_weight = false;
continue;
}
if (!begin_weight)
{
if (!node_name.empty())
{
if (member_nodes.contains(node_name))
{
cerr << "ERROR (in config file): Node entered twice in specification "
"of cluster."
<< endl;
exit(EXIT_FAILURE);
}
else
member_nodes[node_name] = 1.0;
}
node_name = token;
}
else
try
{
auto weight = stod(token);
if (weight <= 0)
{
cerr << "ERROR (in config file): Misspecification of weights passed to "
"Members option."
<< endl;
exit(EXIT_FAILURE);
}
member_nodes[node_name] = weight;
}
catch (const invalid_argument&)
{
cerr << "ERROR (in config file): Misspecification of weights passed to "
"Members option."
<< endl;
exit(EXIT_FAILURE);
}
}
if (!node_name.empty())
{
if (!member_nodes.contains(node_name))
member_nodes[node_name] = 1.0;
else
{
cerr << "ERROR (in config file): Node entered twice in specification of "
"cluster."
<< endl;
exit(EXIT_FAILURE);
}
}
}
else
{
cerr << "ERROR (in config file): Option " << tokenizedLine.front() << " is invalid."
<< endl;
exit(EXIT_FAILURE);
}
}
}
if (!includepath.empty())
addPathsConfFileElement(includepath);
else
addParallelConfFileElement(inNode, inCluster, member_nodes, name, computerName, port, minCpuNbr,
maxCpuNbr, userName, password, remoteDrive, remoteDirectory,
programPath, programConfig, matlabOctavePath, singleCompThread,
numberOfThreadsPerJob, operatingSystem);
configFile.close();
}
void
Configuration::addPathsConfFileElement(vector<string> includepath)
{
if (includepath.empty())
{
cerr << "ERROR: The path to be included must be passed to the Include option." << endl;
exit(EXIT_FAILURE);
}
else
paths.emplace_back(move(includepath));
}
void
Configuration::addParallelConfFileElement(bool inNode, bool inCluster,
const member_nodes_t& member_nodes, const string& name,
const string& computerName, const string& port,
int minCpuNbr, int maxCpuNbr, const string& userName,
const string& password, const string& remoteDrive,
const string& remoteDirectory, const string& programPath,
const string& programConfig,
const string& matlabOctavePath, bool singleCompThread,
int numberOfThreadsPerJob, const string& operatingSystem)
{
//! ADD NODE
if (inNode)
if (!member_nodes.empty())
{
cerr << "Invalid option passed to [node]." << endl;
exit(EXIT_FAILURE);
}
else if (name.empty() || follower_nodes.contains(name))
{
cerr << "ERROR: Every node must be assigned a unique name." << endl;
exit(EXIT_FAILURE);
}
else
follower_nodes.try_emplace(name, computerName, port, minCpuNbr, maxCpuNbr, userName, password,
remoteDrive, remoteDirectory, programPath, programConfig,
matlabOctavePath, singleCompThread, numberOfThreadsPerJob,
operatingSystem);
//! ADD CLUSTER
else if (inCluster)
{
if (minCpuNbr > 0 || maxCpuNbr > 0 || !userName.empty() || !password.empty()
|| !remoteDrive.empty() || !remoteDirectory.empty() || !programPath.empty()
|| !programConfig.empty() || !matlabOctavePath.empty() || !operatingSystem.empty())
{
cerr << "Invalid option passed to [cluster]." << endl;
exit(EXIT_FAILURE);
}
else if (name.empty() || clusters.contains(name))
{
cerr << "ERROR: The cluster must be assigned a unique name." << endl;
exit(EXIT_FAILURE);
}
else
{
if (clusters.empty())
firstClusterName = name;
clusters.emplace(name, member_nodes);
}
}
}
void
Configuration::checkPass([[maybe_unused]] WarningConsolidation& warnings) const
{
if (!parallel && !parallel_test)
return;
//! Check Follower Nodes
if (follower_nodes.empty())
{
cerr << "ERROR: At least one node must be defined in the config file." << endl;
exit(EXIT_FAILURE);
}
for (const auto& follower_node : follower_nodes)
{
#if !defined(_WIN32) && !defined(__CYGWIN32__)
// For Linux/Mac, check that cpuNbr starts at 0
if (follower_node.second.minCpuNbr != 0)
warnings << "WARNING: On Unix-based operating systems, you cannot specify the CPU that is "
<< "used in parallel processing. This will be adjusted for you such that the "
<< "same number of CPUs are used." << endl;
#endif
if (!follower_node.second.port.empty())
try
{
stoi(follower_node.second.port);
}
catch (const invalid_argument&)
{
cerr << "ERROR (node " << follower_node.first << "): the port must be an integer."
<< endl;
exit(EXIT_FAILURE);
}
if (follower_node.second.computerName == "localhost") // We are working locally
{
if (!follower_node.second.remoteDrive.empty())
{
cerr << "ERROR (node " << follower_node.first
<< "): the RemoteDrive option may not be passed for a local node." << endl;
exit(EXIT_FAILURE);
}
if (!follower_node.second.remoteDirectory.empty())
{
cerr << "ERROR (node " << follower_node.first
<< "): the RemoteDirectory option may not be passed for a local node." << endl;
exit(EXIT_FAILURE);
}
}
else
{
if (follower_node.second.userName.empty())
{
cerr << "ERROR (node " << follower_node.first
<< "): the UserName option must be passed for every remote node." << endl;
exit(EXIT_FAILURE);
}
if (follower_node.second.operatingSystem == "windows")
{
if (follower_node.second.password.empty())
{
cerr << "ERROR (node " << follower_node.first
<< "): the Password option must be passed under Windows for every remote "
"node."
<< endl;
exit(EXIT_FAILURE);
}
if (follower_node.second.remoteDrive.empty())
{
cerr << "ERROR (node " << follower_node.first
<< "): the RemoteDrive option must be passed under Windows for every remote "
"node."
<< endl;
exit(EXIT_FAILURE);
}
}
#if defined(_WIN32) || defined(__CYGWIN32__)
if (follower_node.second.operatingSystem.empty())
{
if (follower_node.second.password.empty())
{
cerr << "ERROR (node " << follower_node.first
<< "): the Password option must be passed under Windows for every remote "
"node."
<< endl;
exit(EXIT_FAILURE);
}
if (follower_node.second.remoteDrive.empty())
{
cerr << "ERROR (node " << follower_node.first
<< "): the RemoteDrive option must be passed under Windows for every remote "
"node."
<< endl;
exit(EXIT_FAILURE);
}
}
#endif
if (follower_node.second.remoteDirectory.empty())
{
cerr << "ERROR (node " << follower_node.first
<< "): the RemoteDirectory must be specified for every remote node." << endl;
exit(EXIT_FAILURE);
}
}
}
//! Check Clusters
if (clusters.empty())
{
cerr << "ERROR: At least one cluster must be defined in the config file." << endl;
exit(EXIT_FAILURE);
}
if (!cluster_name.empty() && !clusters.contains(cluster_name))
{
cerr << "ERROR: Cluster Name " << cluster_name << " was not found in the config file."
<< endl;
exit(EXIT_FAILURE);
}
for (const auto& cluster : clusters)
for (const auto& itmn : cluster.second.member_nodes)
if (!follower_nodes.contains(itmn.first))
{
cerr << "Error: node " << itmn.first << " specified in cluster " << cluster.first
<< " was not found" << endl;
exit(EXIT_FAILURE);
}
}
void
Configuration::transformPass()
{
/* If the user did not specify the GlobalInitFile option, use global_init.m in configuration
directory if it exists */
if (auto default_global_init_file = findConfigFile("global_init.m");
global_init_file.empty() && !default_global_init_file.empty())
global_init_file = default_global_init_file.string();
if (!parallel && !parallel_test)
return;
#if !defined(_WIN32) && !defined(__CYGWIN32__)
// For Linux/Mac, check that cpuNbr starts at 0
for (auto& it : follower_nodes)
if (it.second.minCpuNbr != 0)
{
it.second.maxCpuNbr = it.second.maxCpuNbr - it.second.minCpuNbr;
it.second.minCpuNbr = 0;
}
#endif
auto cluster_it
= cluster_name.empty() ? clusters.find(firstClusterName) : clusters.find(cluster_name);
double weight_denominator {0.0};
for (const auto& it : cluster_it->second.member_nodes)
weight_denominator += it.second;
for (auto& member_node : cluster_it->second.member_nodes)
member_node.second /= weight_denominator;
}
vector<filesystem::path>
Configuration::getIncludePaths() const
{
vector<filesystem::path> include_paths;
for (const auto& path : paths)
for (const auto& mapit : path.get_paths())
for (const auto& vecit : mapit.second)
include_paths.emplace_back(vecit);
return include_paths;
}
void
Configuration::writeHooks(ostream& output) const
{
if (!global_init_file.empty())
output << "options_.global_init_file = '" << global_init_file << "';" << endl;
}
void
Configuration::writeCluster(ostream& output) const
{
if (!parallel && !parallel_test)
return;
auto cluster_it
= cluster_name.empty() ? clusters.find(firstClusterName) : clusters.find(cluster_name);
for (int i {1}; const auto& follower_node : follower_nodes)
{
bool follower_node_in_member_nodes = false;
for (const auto& itmn : cluster_it->second.member_nodes)
if (follower_node.first == itmn.first)
follower_node_in_member_nodes = true;
if (!follower_node_in_member_nodes)
continue;
output << "options_.parallel";
if (i > 1)
output << "(" << i << ")";
i++;
output << " = struct('Local', ";
if (follower_node.second.computerName == "localhost")
output << "1, ";
else
output << "0, ";
output << "'ComputerName', '" << follower_node.second.computerName << "', "
<< "'Port', '" << follower_node.second.port << "', "
<< "'CPUnbr', [" << follower_node.second.minCpuNbr << ":"
<< follower_node.second.maxCpuNbr << "], "
<< "'UserName', '" << follower_node.second.userName << "', "
<< "'Password', '" << follower_node.second.password << "', "
<< "'RemoteDrive', '" << follower_node.second.remoteDrive << "', "
<< "'RemoteDirectory', '" << follower_node.second.remoteDirectory
<< "', "
// The following should be switched back to “ProgramPath” once we move to Dragonfly
<< "'DynarePath', '" << follower_node.second.programPath << "', "
<< "'ProgramConfig', '" << follower_node.second.programConfig << "', "
<< "'MatlabOctavePath', '" << follower_node.second.matlabOctavePath << "', "
<< "'OperatingSystem', '" << follower_node.second.operatingSystem << "', "
<< "'NodeWeight', '" << cluster_it->second.member_nodes.at(follower_node.first)
<< "', "
<< "'NumberOfThreadsPerJob', " << follower_node.second.numberOfThreadsPerJob << ", ";
if (follower_node.second.singleCompThread)
output << "'SingleCompThread', 'true');" << endl;
else
output << "'SingleCompThread', 'false');" << endl;
}
// Default values for the following two are both in DynareMain.cc and
// matlab/default_option_values.m
if (parallel_follower_open_mode)
output << "options_.parallel_info.leaveSlaveOpen = 1;" << endl;
if (!parallel_use_psexec)
output << "options_.parallel_info.use_psexec = false;" << endl;
output << "options_.parallel_info.console_mode= isoctave;" << endl;
output << "InitializeComputationalEnvironment();" << endl;
if (parallel_test)
output
<< "ErrorCode = AnalyseComputationalEnvironment(options_.parallel, options_.parallel_info);"
<< endl
<< "disp(['AnalyseComputationalEnvironment returned with Error Code: ' "
"num2str(ErrorCode)]);"
<< endl
<< "diary off;" << endl
<< "return;" << endl;
}
void
Configuration::writeEndParallel(ostream& output) const
{
if ((!parallel && !parallel_test) || !parallel_follower_open_mode)
return;
output << "if options_.parallel_info.leaveSlaveOpen == 1" << endl
<< " closeSlave(options_.parallel,options_.parallel_info.RemoteTmpFolder);" << endl
<< "end" << endl;
}
filesystem::path
Configuration::findConfigFile(const string& filename)
{
#ifdef _WIN32
array<wchar_t, MAX_PATH + 1> appdata;
if (SHGetFolderPathW(nullptr, CSIDL_APPDATA | CSIDL_FLAG_DONT_VERIFY, nullptr, SHGFP_TYPE_CURRENT,
appdata.data())
== S_OK)
{
filesystem::path candidate {filesystem::path {appdata.data()} / "dynare" / filename};
if (exists(candidate))
return candidate;
}
#else
filesystem::path xdg_config_home;
if (auto xdg_config_home_env = getenv("XDG_CONFIG_HOME"); xdg_config_home_env)
xdg_config_home = xdg_config_home_env;
if (auto home = getenv("HOME"); xdg_config_home.empty() && home)
xdg_config_home = filesystem::path {home} / ".config";
if (!xdg_config_home.empty())
{
filesystem::path candidate {xdg_config_home / "dynare" / filename};
if (exists(candidate))
return candidate;
}
string xdg_config_dirs;
if (auto xdg_config_dirs_env = getenv("XDG_CONFIG_DIRS"); xdg_config_dirs_env)
xdg_config_dirs = xdg_config_dirs_env;
if (xdg_config_dirs.empty())
xdg_config_dirs = "/etc/xdg";
for (const auto& dir : DataTree::strsplit(xdg_config_dirs, ':'))
{
filesystem::path candidate {filesystem::path {dir} / "dynare" / filename};
if (exists(candidate))
return candidate;
}
#endif
return {};
}