root/misc/opttest.d

module opttest;

import std.stdio : writefln;
import optparse;

void print_opts(Options options) {
    writefln("file:        ", options["file"]);
    writefln("imports:     ", options.list("importPath"));
    writefln("verbosity:   ", options.count("verbose"));
    writefln("value:       ", options.value("value"));
    writefln("number list: ", options.valueList("list"));
    writefln("switch:      ", options.flag("switch"));
    writefln("turn-off:    ", options.flag("turn"));
    writefln("color:       ", options["color"]);
    writefln("args:        ", options.args);
}

int main(char[][] args) {
    auto parser = new OptionParser("A test suite for optparser.");
    parser.addOption("-f", "--file").help("Stores a single argument.");
    parser.addOption(["-I", "--import"], "importPath", Action.Append).help("Adds arguments to a list.");
    parser.addOption(["-c", "--callback"], {
        writefln("callback encountered");
    }).help("Calls a callback.");
    parser.addOption(["-n", "--number"], (int i) {
        writefln("number callback: %d * 2 = %d", i, i*2);
    }).help("Calls a callback with a number.");
    // A fancy callback
    parser.addOption(["--fancy"], "a callback", (Options opts, inout char[][] a, inout int i, char[] name) {
        writefln("Current file: %s", opts["file"]);
        writefln("Remaining args: %s", a[i+1 .. $]);
        // Skip the next arg
        ++i;
        writefln("This arg's name: %s", name);
    }).help("Tests optparse's fancy callbacks.");
    parser.addOption(["--enable"], "switch", Action.SetTrue).help("Enables the switch.");
    parser.addOption(["--disable"], "switch", Action.SetFalse).help("Disables the switch.");
    parser.addOption(["--turn-off"], "turn", Action.SetFalse).help("Tests default values for flags.").def(true);
    parser.addOption(["--set-blue"], "color", Action.StoreConst, "blue").help("Tests default values for consts.").def("green");
    parser.addOption(["-V", "--value"], ArgType.Integer).help("Stores a single number").argName("NUMBER");
    parser.addOption(["-l", "--list"], Action.Append, ArgType.Integer).help("Adds numbers to a list.").argName("NUMBER");
    parser.addOption(["-v", "--verbose"], Action.Count).help("Counts the number of times this option appears.");
    parser.addOption(["-h", "--help"], Action.Help).help("Displays a help message.");
    auto options = parser.parse(args);

    print_opts(options);

    return 0;
}