main.cc

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/*!
 *
 * Copyright (C) 2015 Technical University of Liberec.  All rights reserved.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 3 as published by the
 * Free Software Foundation. (http://www.gnu.org/licenses/gpl-3.0.en.html)
 * 
 * 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.
 *
 * 
 * @file    main.cc
 * @brief   This file should contain only creation of Application object.
 */


#include "system/system.hh"
#include "system/sys_profiler.hh"
#include "system/python_loader.hh"
#include "coupling/hc_explicit_sequential.hh"
#include "coupling/balance.hh"
#include "input/accessors.hh"
#include "input/reader_to_storage.hh"
#include "input/reader_internal_base.hh"

#include <iostream>
#include <fstream>
#include <regex>
#include <boost/program_options/parsers.hpp>
#include <boost/program_options/variables_map.hpp>
#include <boost/program_options/options_description.hpp>
#include <boost/filesystem.hpp>
#include <thread>         // std::this_thread::sleep_for
#include <chrono>         // std::chrono::seconds


#include "main.h"

#include "rev_num.h"

/// named version of the program
//#define _PROGRAM_VERSION_   "0.0.0"

//#ifndef _PROGRAM_REVISION_
//    #define _PROGRAM_REVISION_ "(unknown revision)"
//#endif

//#ifndef _PROGRAM_BRANCH_
//    #define _PROGRAM_BRANCH_ "(unknown branch)"
//#endif

#ifndef FLOW123D_COMPILER_FLAGS_
    #define FLOW123D_COMPILER_FLAGS_ "(unknown compiler flags)"
#endif


namespace it = Input::Type;

// this should be part of a system class containing all support information
it::Record & Application::get_input_type() {
    static it::Record type = it::Record("Root", "Root record of JSON input for Flow123d.")
    .declare_key("flow123d_version", it::String(), it::Default::obligatory(),
            "Version of Flow123d for which the input file was created."
            "Flow123d only warn about version incompatibility. "
            "However, external tools may use this information to provide conversion "
            "of the input file to the structure required by another version of Flow123d.")
    .declare_key("problem", CouplingBase::get_input_type(), it::Default::obligatory(),
            "Simulation problem to be solved.")
    .declare_key("pause_after_run", it::Bool(), it::Default("false"),
            "If true, the program will wait for key press before it terminates.")
    .close();

    return type;
}


// Note: python_path might be unused if compiling without python support
Application::Application(FMT_UNUSED const std::string &python_path)
: ApplicationBase(),
  problem_(nullptr),
  main_input_filename_(""),
  //passed_argc_(0),
  //passed_argv_(0),
  use_profiler(true),
  profiler_path(""),
  yaml_balance_output_(false)
{
    // initialize python stuff if we have
    // nonstandard python home (release builds)
#ifdef FLOW123D_HAVE_PYTHON
    PythonLoader::initialize(python_path);
#endif

}


Input::Type::RevNumData Application::get_rev_num_data() {
    Input::Type::RevNumData rev_num_data;

    rev_num_data.version = string(FLOW123D_VERSION_NAME_);
    rev_num_data.revision = string(FLOW123D_GIT_REVISION_);
    rev_num_data.branch = string(FLOW123D_GIT_BRANCH_);
    rev_num_data.url = string(FLOW123D_GIT_URL_);

    return rev_num_data;
}


void Application::display_version() {
    // Say Hello
    // make strings from macros in order to check type
    Input::Type::RevNumData rev_num_data = this->get_rev_num_data();
    string build = string(__DATE__) + ", " + string(__TIME__)
            + " flags: " + string(FLOW123D_COMPILER_FLAGS_);


    MessageOut().fmt("This is Flow123d, version {} commit: {}\n",
            rev_num_data.version, rev_num_data.revision);
    MessageOut().fmt("Branch: {}\nBuild: {}\nFetch URL: {}\n",
         rev_num_data.branch, build, rev_num_data.url );
    Profiler::instance()->set_program_info("Flow123d",
            rev_num_data.version, rev_num_data.branch, rev_num_data.revision, build);
}



Input::Record Application::read_input() {
   if (main_input_filename_ == "") {
        cout << "Usage error: The main input file has to be specified through -s parameter.\n\n";
        cout << program_arguments_desc_ << "\n";
        exit( exit_failure );
    }

    // read main input file
    FilePath fpath(main_input_filename_, FilePath::FileType::input_file);
    
    Input::ReaderToStorage json_reader(fpath, get_input_type() );
    root_record = json_reader.get_root_interface<Input::Record>();
    
    return root_record;
}



void Application::parse_cmd_line(const int argc, char ** argv) {
    namespace po = boost::program_options;


    // Declare the supported options.
    po::options_description desc("Allowed options");
    desc.add_options()
        ("help", "produce help message")
        ("solve,s", po::value< string >(), "Main input file to solve.")
        ("input_dir,i", po::value< string >()->default_value("input"), "Directory for the $INPUT_DIR$ placeholder in the main input file.")
        ("output_dir,o", po::value< string >()->default_value("output"), "Directory for all produced output files.")
        ("log,l", po::value< string >()->default_value("flow123"), "Set base name for log files.")
        ("version", "Display version and build information and exit.")
        ("no_log", "Turn off logging.")
        ("no_signal_handler", "Turn off signal handling. Useful for debugging with valgrind.")
        ("no_profiler,no-profiler", "Turn off profiler output.")
        ("profiler_path,profiler-path", po::value< string >(), "Path to the profiler file")
        ("input_format", po::value< string >(), "Writes full structure of the main input file into given file.")
        ("petsc_redirect", po::value<string>(), "Redirect all PETSc stdout and stderr to given file.")
        ("yaml_balance", "Redirect balance output to YAML format too (simultaneously with the selected balance output format).");

    ;

    // Can not use positional arguments together with PETSC options.
    // Use our own solution trying to use the first unrecognized option as the main input file.

    // parse the command line
    po::variables_map vm;
    auto parser = po::basic_command_line_parser<char>(argc, argv)
            .options(desc)
            .allow_unregistered();
    po::parsed_options parsed = parser.run();
    po::store(parsed, vm);
    po::notify(vm);

    // get unknown options
    vector<string> to_pass_further = po::collect_unrecognized(parsed.options, po::include_positional);


    /*
    passed_argc_ = to_pass_further.size();
    passed_argv_ = new char * [passed_argc_+1];

    // first copy the program executable in argv[0]
    int arg_i=0;
    if (argc > 0) passed_argv_[arg_i++] = xstrcpy( argv[0] );

    for(int i=0; i < passed_argc_; i++) {
        passed_argv_[arg_i++] = xstrcpy( to_pass_further[i].c_str() );
    }
    passed_argc_ = arg_i;
    */

    // possibly turn off profilling
    if (vm.count("no_profiler")) {
        use_profiler=false;
    }

    if (vm.count("profiler_path")) {
        profiler_path = vm["profiler_path"].as<string>();
    }

    // if there is "help" option
    if (vm.count("help")) {
        display_version();
        cout << endl;
        cout << "Usage:" << endl;
        cout << "   flow123d -s <main_input>.yaml <other options> <PETSC options>" << endl;
        cout << "   flow123d <main_input>.yaml <other options> <PETSC options>" << endl;
        cout << desc << "\n";
        exit( exit_output );
    }

    if (vm.count("version")) {
        display_version();
        exit( exit_output );
    }

    // if there is "input_format" option
    if (vm.count("input_format")) {
        // write ist to json file
        ofstream json_stream;
        FilePath(vm["input_format"].as<string>(), FilePath::output_file).open_stream(json_stream);
        // create the root Record
        it::Record root_type = get_input_type();
        root_type.finish();
        Input::Type::TypeBase::delete_unfinished_types();
        json_stream << Input::Type::OutputJSONMachine( root_type, this->get_rev_num_data() );
        json_stream.close();
        exit( exit_output );
    }

    if (vm.count("petsc_redirect")) {
        this->petsc_redirect_file_ = vm["petsc_redirect"].as<string>();
    }

    if (vm.count("no_signal_handler")) {
        this->signal_handler_off_ = true;
    }

    // if there is "solve" option
    string input_filename = "";

    // check for positional main input file
    if (to_pass_further.size()) {
        string file_candidate = to_pass_further[0];
        if (file_candidate[0] != '-') {
            // pop the first option
            input_filename = file_candidate;
            to_pass_further.erase(to_pass_further.begin());
        }
    }

    if (vm.count("solve")) {
        input_filename = vm["solve"].as<string>();
    }

    if (input_filename == "")
        THROW(ExcMessage() << EI_Message("Main input file not specified (option -s)."));

    // preserves output of balance in YAML format
    if (vm.count("yaml_balance")) Balance::set_yaml_output();

    string input_dir;
    string output_dir;
    if (vm.count("input_dir")) {
        input_dir = vm["input_dir"].as<string>();
    }
    if (vm.count("output_dir")) {
            output_dir = vm["output_dir"].as<string>();
    }

    // assumes working directory "."
    try {
        main_input_filename_ = FilePath::set_dirs_from_input(input_filename, input_dir, output_dir );
    } catch (FilePath::ExcMkdirFail &e) {
        use_profiler = false; // avoid profiler output
        throw e;
    }

    if (vm.count("log")) {
        this->log_filename_ = vm["log"].as<string>();
    }

    if (vm.count("no_log")) {
        this->log_filename_="//";     // override; do not open log files
    }

    ostringstream tmp_stream(program_arguments_desc_);
    tmp_stream << desc;
    // TODO: catch specific exceptions and output usage messages
}





void Application::run() {
    START_TIMER("Application::run");
    display_version();

    START_TIMER("Read Input");
    // get main input record handle
    Input::Record i_rec = read_input();
    END_TIMER("Read Input");

    {
        using namespace Input;
        // check input file version against the version of executable
        std::regex version_re("([^.]*)[.]([^.]*)[.]([^.]*)");
        std::smatch match;
        std::string version(FLOW123D_VERSION_NAME_);
        vector<string> ver_fields(3);
        if ( std::regex_match(version, match, version_re) ) {
            ver_fields[0]=match[1];
            ver_fields[1]=match[2];
            ver_fields[2]=match[3];
        } else {
            OLD_ASSERT(1, "Bad Flow123d version format: %s\n", version.c_str() );
        }

        std::string input_version = i_rec.val<string>("flow123d_version");
        vector<string> iver_fields(3);
        if ( std::regex_match(input_version, match, version_re) ) {
            iver_fields[0]=match[1];
            iver_fields[1]=match[2];
            iver_fields[2]=match[3];
        } else {
            THROW( ExcVersionFormat() << EI_InputVersionStr(input_version) );
        }

        if ( iver_fields[0] != ver_fields[0] || iver_fields[1] > ver_fields[1] ) {
            WarningOut().fmt("Input file with version: '{}' is no compatible with the program version: '{}' \n",
                    input_version, version);
        }

        // should flow123d wait for pressing "Enter", when simulation is completed
        sys_info.pause_after_run = i_rec.val<bool>("pause_after_run");
        // read record with problem configuration
        Input::AbstractRecord i_problem = i_rec.val<AbstractRecord>("problem");

        if (i_problem.type() == HC_ExplicitSequential::get_input_type() ) {

            problem_ = new HC_ExplicitSequential(i_problem);

            // run simulation
            problem_->run_simulation();
        } else {
            xprintf(UsrErr,"Problem type not implemented.");
        }

    }

    this->after_run();
}




void Application::after_run() {
    if (sys_info.pause_after_run) {
        printf("\nPress <ENTER> for closing the window\n");
        getchar();
    }
}




void Application::terminate() {
    // Test if all processes are in the exception.
    MPI_Request request;
    MPI_Ibarrier(MPI_COMM_WORLD, &request);
    std::this_thread::sleep_for(std::chrono::microseconds(10));
    int done;
    MPI_Status status;
    MPI_Test(&request, &done, &status);
    if (! done) {
        // Kill all if we can not synchronize.
        MPI_Abort( MPI_COMM_WORLD, ApplicationBase::exit_failure);
    }
    // Peacefull end.
}




Application::~Application() {
    if (problem_) delete problem_;

    if (use_profiler) {
        if (petsc_initialized) {
            // log profiler data to this stream
            Profiler::instance()->output (PETSC_COMM_WORLD, profiler_path);
        } else {
            Profiler::instance()->output(profiler_path);
        }

        // call python script which transforms json file at given location
        // Profiler::instance()->transform_profiler_data (".csv", "CSVFormatter");
        Profiler::instance()->transform_profiler_data (".txt", "SimpleTableFormatter2");

        // finally uninitialize
        Profiler::uninitialize();
    }
}


//=============================================================================

/**
 *  FUNCTION "MAIN"
 */
int main(int argc, char **argv) {
    Application app(argv[0]);
    try {
        app.init(argc, argv);
        app.run();
    } catch (std::exception & e) {
        _LOG( Logger::MsgType::error ).every_proc() << e.what();
        app.terminate();
        return ApplicationBase::exit_failure;
    } catch (...) {
        _LOG( Logger::MsgType::error ).every_proc() << "Unknown exception" << endl;
        app.terminate();
        return ApplicationBase::exit_failure;
    }

    // Say Goodbye
    return ApplicationBase::exit_success;
}