int main(int argc, char* argv[])
{
// The command line options parser
GetOpt::Parser options;
// Option : --text="<X>" or -t "<X>"
String optText = "A default value";
options.add(optText, 't', "text", "An example with the type `Yuni::String`");
// Option : --int="<X>" or -i "<X>"
int optInt = 42;
options.add(optInt, 'i', "int", "An example with the type `int`");
// Ask to the parser to parse the command line
if (!options(argc, argv))
{
// The program should not continue here
return (options.errors() ? 1 /* error */ : 0);
}
// Displaying the values
std::cout << "Value for `optText` : `" << optText << "`" << std::endl;
std::cout << "Value for `optInt` : `" << optInt << "`" << std::endl;
return 0;
}
bool LibConfigProgram::parseCommandLine(int argc, char** argv)
{
// The Command line parser
GetOpt::Parser opts;
// Compiler
opts.addParagraph("\nTypical usage example :\n $ yuni-config -c gcc -m script --cxxflags\n\nCompiler settings:");
opts.addFlag(pOptCxxFlags, ' ', "cxxflags", "Print the CXX flags (*)");
opts.addFlag(pOptLibFlags, ' ', "libs", "Print the Libs flags (*)");
opts.add(pOptCompiler, 'c', "compiler", "Set the target compiler (gcc,msvc,mingw,icc,...)");
opts.addFlag(pOptPrintCompilerByDefault, ' ', "compiler-default", "Print the compiler used by default and exit");
// All required modules
opts.addParagraph("\nModules:");
opts.add(pOptModules, 'm', "modules", "Add one or several requested modules (*)");
opts.addFlag(pOptModuleList, ' ', "module-list", "Print all available modules of the selected version and exit (*)");
opts.addFlag(pOptPrintModulesDeps, ' ', "module-deps", "Print all modules and the dependencies required and exit (*)");
// Prefix
opts.addParagraph("\nSearching paths:");
opts.add(pOptPrefix, 'p', "prefix", "Add a prefix folder for searching available versions of libyuni");
opts.addFlag(pOptNoDefaultPath, ' ', "no-default-path", "Do not use the default paths to find available versions of libyuni");
opts.addFlag(pOptDefaultPathList, ' ', "default-path-list", "Print the default paths that would be used and exit (empty if 'no-default-path' is enabled)");
opts.addParagraph("\nVersions:");
opts.addFlag(pOptList, 'l', "list", "Print the list of all versions of libyuni which have been found (with complete informations) and exit");
opts.addFlag(pOptListOnlyVersions, ' ', "list-only-versions", "Print the list of all versions of libyuni which have been found and exit");
// Help
opts.addParagraph("\nHelp\n * : Option related to the selected version of libyuni");
bool quiet = false;
opts.addFlag(quiet, ' ', "quiet", "Suppress error messages");
opts.addFlag(pOptDebug, ' ', "debug", "Print debug messages");
opts.addFlag(pOptVersion, 'v', "version", "Print the version and exit");
if (!opts(argc, argv))
{
pExitStatus = opts.errors() ? 1 /*error*/ : 0;
if ((pOptPrintErrors and not quiet) || pOptDebug)
std::cout << "Error when parsing the command line\n";
return false;
}
if (quiet)
pOptPrintErrors = false;
if (pOptPrintCompilerByDefault)
{
std::cout << YUNI_LIBCONFIG_DEFAULT_COMPILER << "\n";
return false;
}
// Clean the prefix paths (make them absolute)
pVersionList.debug(pOptDebug);
cleanPrefixPaths();
normalizeCompiler();
return true;
}
static inline void ParseCommandLine(int argc, char** argv, Settings& settings)
{
GetOpt::Parser options;
String::Vector optFilenames;
ShortString16 format;
options.add(optFilenames, 'i', "input", "The input grammar");
options.add(settings.namespaceName, 'n', "namespace", "The target namespace (mandatory)");
options.add(format, 'f', "format", "Output format [cpp]");
options.remainingArguments(optFilenames);
if (not options(argc, argv))
{
if (options.errors())
{
std::cout << "Abort due to error" << std::endl;
exit(EXIT_FAILURE);
}
exit(0);
}
if (optFilenames.empty())
{
logs.error() << "please provide a grammar file";
exit(EXIT_FAILURE);
}
settings.namespaceName.trim(" \t\r\n.:");
if (settings.namespaceName.empty())
{
logs.error() << "no namespace provided";
exit(EXIT_FAILURE);
}
format.trim();
format.toLower();
if (format == "cpp")
{
settings.format = Settings::sfCPP;
}
else
{
logs.error() << "invalid output format";
exit(EXIT_FAILURE);
}
settings.filenames.resize((uint) optFilenames.size());
for (uint i = 0; i != (uint) optFilenames.size(); ++i)
IO::Canonicalize(settings.filenames[i], optFilenames[i]);
}
int main(int argc, char* argv[])
{
// The command line options parser
GetOpt::Parser options;
// A simple option : --text
String optText;
options.add(optText, 't', "text");
// For the help, we want to display _our_ help usage
// For that, we have to override the option `--help`
bool optHelp = false;
options.addFlag(optHelp, 'h', "help");
// But, do not forget to do the same thing for `?` on
// Windows, for compatibility with other programs.
// Example: getopt_04_customhelpusage.exe /?
# ifdef YUNI_OS_WINDOWS
// It is safe to use the same variable `optFlag`
options.addFlag(optHelp, '?');
# endif
// Ask the parser to parse the command line
if (!options(argc, argv))
{
// The program should not continue here
return (options.errors() ? 1 /* error */ : 0);
}
if (optHelp)
{
std::cout <<
"This is our custom help usage.\n"
"Here is the list of options :\n\n"
" -t, --text=VALUE : A text to display\n\n";
return 0;
}
std::cout << "Text : `" << optText << "`" << std::endl;
return 0;
}
int main(int argc, char* argv[])
{
// The command line options parser
GetOpt::Parser options;
// A simple option : --title="<X>" or -t "<X>"
// We have to provide the variable where the given value on the command line
// will be written
String optText = "A default value";
// Adding the option to the parser :
// <variable> : the variable where the user data will be written
// 't' : The short name of the option (./getopt_00_simple -t "my value")
// "text" : The long name of the option (./getopt_00_simple --text "my value")
// <description> : The description of the option, that will be displayed in the help usage
options.add(optText, 't', "title", "An option with a parameter");
// A simple flag, enabled when the option is present on the command line
// Example: ./getopt_00_simple --verbose
bool optVerbose = false;
options.addFlag(optVerbose, 'v', "verbose", "A simple flag");
// Ask to the parser to parse the command line
if (not options(argc, argv))
{
// The program should not continue here
// The user may have requested the help or an error has happened
// If an error has happened, the exit status should be different from 0
if (options.errors())
{
std::cout << "Abort due to error" << std::endl;
return 1;
}
return 0;
}
// Displaying the value of our variable on the standard output
std::cout << "Value for `optText` : `" << optText << "`" << std::endl;
std::cout << "Verbose : " << optVerbose << std::endl;
return 0;
}