fail to run if only dir is specified and not config file full path

[MarnixCroes]

In case a specified config file does not exist it should fail to run.
Currently it logs Using config file: "x", even when x is not a config file.

for example, when running ./bs --config=/home/user/Documents

[MarnixCroes]

This is when you enter a dir, instead of non existing config file.

[evoskuil]

With existing directory this is what I get in Windwos.

> bs -c m:/foo
Error: can not read options configuration file 'm:\foo'

[evoskuil]

Requires more info, @eynhaender can you verify?

[eynhaender]

Can confirm.

eynhaender@thinklin:~/development/libbitcoin/test$ ./bsdbg -c /home/eynhaender/
2026-05-14T01:45:26Z.0 ====================== startup =======================
2026-05-14T01:45:26Z.0 Using config file: "/home/eynhaender/"
2026-05-14T01:45:26Z.0 The "bitcoin" database directory does not exist.
2026-05-14T01:45:26Z.0 Using config file: "/home/eynhaender/"
2026-05-14T01:45:26Z.0 Initializing "bitcoin" directory...
2026-05-14T01:45:26Z.0 Please wait while creating the database...
2026-05-14T01:45:26Z.0 create::create_file(header_head)

There's a check in system/parser.cpp that seems to be deactivated intentionally:

bool parser::load_configuration_variables(variables_map& variables,
    const std::string& option_name) THROWS
{
    const auto settings = load_settings();
    const auto path = get_config_option(variables, option_name);
    const auto extended = extended_path(path);

    std::error_code code{};
    if (!path.empty() /*&& std::filesystem::exists(extended, code)*/)
    {
        ifstream file{ path };
        if (!file.good())
            throw ifstream_exception{ from_path(extended).c_str() };

        const auto config = parse_config_file(file, settings);
        store(config, variables);
        return true;
    }

[evoskuil]

Likely a cross platform return code difference. Worth checking macos too.