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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include "orcus/yaml_document_tree.hpp"
#include "orcus/yaml_parser_base.hpp"
#include "orcus/config.hpp"
#include "orcus/stream.hpp"
#include <iostream>
#include <fstream>
#include <string>
#include <boost/program_options.hpp>
#include "filesystem_env.hpp"
using namespace std;
using namespace orcus;
namespace po = boost::program_options;
const char* help_program = "The FILE must specify a path to an existing file.";
const char* err_no_input_file = "No input file.";
const char* help_yaml_output = "Output file path.";
const char* help_yaml_output_format =
"Specify the format of output file. Supported format types are:\n"
" 1) yaml\n"
" 2) json";
void print_yaml_usage(std::ostream& os, const po::options_description& desc)
{
os << "Usage: orcus-yaml [options] FILE" << endl << endl;
os << help_program << endl << endl << desc;
}
std::unique_ptr<yaml_config> parse_yaml_args(int argc, char** argv)
{
po::options_description desc("Options");
desc.add_options()
("help,h", "Print this help.")
("output,o", po::value<string>(), help_yaml_output)
("output-format,f", po::value<string>(), help_yaml_output_format);
po::options_description hidden("Hidden options");
hidden.add_options()
("input", po::value<string>(), "input file");
po::options_description cmd_opt;
cmd_opt.add(desc).add(hidden);
po::positional_options_description po_desc;
po_desc.add("input", -1);
po::variables_map vm;
try
{
po::store(
po::command_line_parser(argc, argv).options(cmd_opt).positional(po_desc).run(), vm);
po::notify(vm);
}
catch (const exception& e)
{
// Unknown options.
cerr << e.what() << endl;
print_yaml_usage(cerr, desc);
return nullptr;
}
if (vm.count("help"))
{
print_yaml_usage(cout, desc);
return nullptr;
}
std::unique_ptr<yaml_config> config = std::make_unique<yaml_config>();
if (vm.count("input"))
config->input_path = vm["input"].as<string>();
if (vm.count("output"))
config->output_path = vm["output"].as<string>();
if (vm.count("output-format"))
{
std::string outformat = vm["output-format"].as<string>();
if (outformat == "none")
config->output_format = yaml_config::output_format_type::none;
else if (outformat == "yaml")
config->output_format = yaml_config::output_format_type::yaml;
else if (outformat == "json")
config->output_format = yaml_config::output_format_type::json;
else
{
cerr << "Unknown output format type '" << outformat << "'." << endl;
return nullptr;
}
}
else
{
cerr << "Output format is not specified." << endl;
print_yaml_usage(cerr, desc);
return nullptr;
}
if (config->input_path.empty())
{
cerr << err_no_input_file << endl;
print_yaml_usage(cerr, desc);
return nullptr;
}
if (!fs::exists(config->input_path))
{
cerr << "Input file does not exist: " << config->input_path << endl;
return nullptr;
}
if (config->output_format != yaml_config::output_format_type::none)
{
if (config->output_path.empty())
{
cerr << "Output file not given." << endl;
return nullptr;
}
// Check to make sure the output path doesn't point to an existing
// directory.
if (fs::is_directory(config->output_path))
{
cerr << "Output file path points to an existing directory. Aborting." << endl;
return nullptr;
}
}
return config;
}
std::unique_ptr<yaml::document_tree> load_doc(const char* p, size_t n)
{
std::unique_ptr<yaml::document_tree> doc(std::make_unique<yaml::document_tree>());
try
{
doc->load({p, n});
}
catch (const parse_error& e)
{
cerr << create_parse_error_output(std::string_view(p, n), e.offset()) << endl;
throw;
}
return doc;
}
int main(int argc, char** argv)
{
try
{
std::unique_ptr<yaml_config> config = parse_yaml_args(argc, argv);
if (!config)
return EXIT_FAILURE;
file_content content(config->input_path.data());
std::unique_ptr<yaml::document_tree> doc = load_doc(content.data(), content.size());
switch (config->output_format)
{
case yaml_config::output_format_type::yaml:
{
ofstream fs(config->output_path.c_str());
fs << doc->dump_yaml();
}
break;
case yaml_config::output_format_type::json:
{
ofstream fs(config->output_path.c_str());
fs << doc->dump_json();
}
break;
default:
;
}
}
catch (const std::exception& e)
{
cerr << e.what() << endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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