parse_config_result
metashell::parse_config(int argc_,
const char* argv_[],
const std::map<std::string, engine_entry>& engines_,
iface::environment_detector& env_detector_,
std::ostream* out_,
std::ostream* err_)
{
using boost::program_options::options_description;
using boost::program_options::variables_map;
using boost::program_options::store;
using boost::program_options::notify;
using boost::program_options::parse_command_line;
using boost::program_options::value;
data::config cfg;
if (argc_ > 0)
{
cfg.metashell_binary = argv_[0];
}
const char** const minus_minus =
std::find(argv_, argv_ + argc_, std::string("--"));
if (minus_minus != argv_ + argc_)
{
cfg.extra_clang_args.insert(
cfg.extra_clang_args.end(), minus_minus + 1, argv_ + argc_);
}
const int argc = minus_minus - argv_;
std::string con_type("readline");
cfg.use_precompiled_headers = true;
std::string help_engine;
const std::string engine_info =
"The engine (C++ compiler) to use. Available engines: " +
boost::algorithm::join(engines_ | boost::adaptors::map_keys, ", ") +
". Default: " + cfg.engine;
options_description desc("Options");
// clang-format off
desc.add_options()
("help", "Display help")
("verbose,V", "Verbose mode")
("no_highlight,H", "Disable syntax highlighting")
("indent", "Enable indenting (experimental)")
(
"no_precompiled_headers",
"Disable precompiled header usage."
" (It needs clang++ to be available and writes to the local disc.)"
)
(
"show_pragma_help",
"Display help for pragmas in MarkDown format and exit."
)
(
"show_mdb_help",
"Display help for mdb commands in MarkDown format and exit"
)
(
"disable_saving",
"Disable saving the environment using the #msh environment save"
)
(
"console", value(&con_type)->default_value(con_type),
"Console type. Possible values: plain, readline, json"
)
("nosplash", "Disable the splash messages")
(
"log", value(&cfg.log_file),
"Log into a file. When it is set to -, it logs into the console."
)
("engine", value(&cfg.engine), engine_info.c_str())
("help_engine", value(&help_engine), "Display help about the engine")
("preprocessor", "Starts the shell in preprocessor mode");
// clang-format on
using dec_arg = decommissioned_argument;
using dec_type = decommissioned_argument::type;
std::vector<dec_arg> dec_args{
dec_arg{"include", 'I', dec_type::multiple_values},
dec_arg{"define", 'D', dec_type::multiple_values},
dec_arg{"std", dec_type::one_value},
dec_arg{"no_warnings", 'w', dec_type::flag},
dec_arg{'f', dec_type::one_value}, dec_arg{'s', dec_type::one_value},
dec_arg{
"clang", dec_type::one_value,
"Please use \"--engine clang\" with the custom clang binary instead.",
"{NAME} has been decommissioned. You can specify the clang binary to"
" use by using the clang engine. For example:\n"
"\n" +
std::string(argv_[0]) +
" --engine clang -- {VALUE} -std=c++0x -ftemplate-depth=256"
" -Wfatal-errors" +
(env_detector_.on_windows() ?
" -fno-ms-compatibility -U_MSC_VER" :
"")},
dec_arg{
"enable_saving", dec_type::flag,
"Saving is enabled by default. To disable it, use --disable_saving.",
"Saving is enabled by default."}};
for (auto& a : dec_args)
{
a.add_to(desc);
}
try
{
variables_map vm;
store(parse_command_line(argc, argv_, desc), vm);
notify(vm);
for (const auto& a : dec_args)
{
a.check(vm);
}
cfg.verbose = vm.count("verbose") || vm.count("V");
cfg.syntax_highlight = !(vm.count("no_highlight") || vm.count("H"));
cfg.indent = vm.count("indent") != 0;
cfg.con_type = metashell::data::parse_console_type(con_type);
cfg.use_precompiled_headers = !vm.count("no_precompiled_headers");
cfg.saving_enabled = !vm.count("disable_saving");
cfg.splash_enabled = vm.count("nosplash") == 0;
cfg.preprocessor_mode = vm.count("preprocessor");
if (vm.count("log") == 0)
{
cfg.log_mode = data::logging_mode::none;
}
else
{
cfg.log_mode = (cfg.log_file == "-") ? data::logging_mode::console :
data::logging_mode::file;
}
if (vm.count("help"))
{
if (out_)
{
show_help(*out_, desc);
}
return parse_config_result::exit(false);
}
else if (vm.count("show_pragma_help"))
{
show_pragma_help();
return parse_config_result::exit(false);
}
else if (vm.count("show_mdb_help"))
{
show_mdb_help();
return parse_config_result::exit(false);
}
else if (vm.count("help_engine"))
{
show_engine_help(engines_, help_engine, out_, argv_[0]);
return parse_config_result::exit(false);
}
else
{
return parse_config_result::start_shell(cfg);
}
}
catch (const std::exception& e_)
{
if (err_)
{
*err_ << e_.what() << "\n\n";
show_help(*err_, desc);
}
return parse_config_result::exit(true);
}
}