nansi
/
src
/
main.cc
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156#include "ob/parg.hh"
using Parg = OB::Parg;
#include "ob/term.hh"
namespace aec = OB::Term::ANSI_Escape_Codes;
#include <cstddef>
#include <string>
#include <iostream>
// prototypes
int program_options(Parg& pg);
int program_options(Parg& pg)
{
pg.name("nansi").version("0.1.1 (10.01.2019)");
pg.description("A CLI tool to filter ansi escape sequences and format text streams.");
pg.usage("[flags] [options] [--] [arguments]");
pg.usage("[-v|--version]");
pg.usage("[-h|--help]");
pg.info("Examples", {
"nansi --help",
"nansi --version",
});
pg.info("Exit Codes", {"0 -> normal", "1 -> error"});
pg.info("Repository", {
"https://github.com/octobanana/nansi.git",
});
pg.info("Homepage", {
"https://octobanana.com/software/nansi",
});
pg.author("Brett Robinson (octobanana) <octobanana.dev@gmail.com>");
// general flags
pg.set("help,h", "print the help output");
pg.set("version,v", "print the program version");
pg.set("ansi", "allow ansi escape sequences");
pg.set("line-wrap", "wrap lines at custom width or terminal width");
pg.set("auto-wrap", "wrap lines and auto calculate the indent width");
pg.set("first-wrap", "if the indentation level is 0, don't wrap the line");
pg.set("white-space", "sequences of whitespace will collapse into a single whitespace");
pg.set("width", "0", "num", "maximum output width");
pg.set_stdin();
int status {pg.parse()};
if (status > 0 && pg.get_stdin().empty())
{
std::cerr << pg.help() << "\n";
std::cerr << "Error: " << "expected arguments" << "\n";
return -1;
}
if (status < 0)
{
std::cerr << pg.help() << "\n";
std::cerr << "Error: " << pg.error() << "\n";
auto similar_names = pg.similar();
if (similar_names.size() > 0)
{
std::cerr
<< "did you mean:\n";
for (auto const& e : similar_names)
{
std::cerr
<< " --" << e << "\n";
}
}
return -1;
}
if (pg.get<bool>("help"))
{
std::cerr << pg.help();
return 1;
}
if (pg.get<bool>("version"))
{
std::cerr << pg.name() << " v" << pg.version() << "\n";
return 1;
}
return 0;
}
int main(int argc, char *argv[])
{
Parg pg {argc, argv};
int pstatus {program_options(pg)};
if (pstatus > 0) return 0;
if (pstatus < 0) return 1;
try
{
OB::Term::ostream os {std::cout};
os.line_wrap(false);
if (pg.get<bool>("line-wrap") || pg.get<bool>("auto-wrap"))
{
os.line_wrap(true);
os.auto_wrap(pg.get<bool>("auto-wrap"));
if (pg.get<bool>("first-wrap"))
{
os.first_wrap(false);
}
if (pg.find("width"))
{
os.width(pg.get<std::size_t>("width"));
}
else
{
if (OB::Term::is_term(STDOUT_FILENO))
{
os.width(OB::Term::width(STDOUT_FILENO));
}
}
}
if (! pg.get<bool>("ansi"))
{
os.escape_codes(false);
}
if (! pg.get<bool>("white-space"))
{
os.white_space(false);
}
os
<< pg.get_stdin()
<< OB::Term::iomanip::flush();
}
catch(std::exception const& e)
{
std::cerr << "Error: " << e.what() << "\n";
}
catch(...)
{
std::cerr << "Error: an unexpected error occurred\n";
}
return 0;
}