zig-cli/demo.zig

const std = @import("std");
const heap = std.heap;
const cli = @import("cli");
const Command = cli.Command;
const Option = cli.Option;

fn rootRun(cmd: *Command) anyerror!void {
    const e = cmd.getIntOption("example");
    std.debug.print("{d}\n", .{e});
}

fn subcommandRun(cmd: *Command) anyerror!void {
    std.debug.print("{s}\n", .{cmd.config.name});
}

pub fn main() !void {
    var gpa = heap.GeneralPurposeAllocator(.{}){};
    const allocator = gpa.allocator();
    const config = Command.CommandConfig{
        .short_description = "Example",
        .long_description = "Example command",
        .usage = "example",
        .name = "example",
        .run = rootRun,
    };
    var root_command = try Command.init(allocator, config);
    const subcommand = try Command.init(allocator, .{
        .short_description = "SubExample",
        .long_description = "Subcommand example",
        .usage = "subexample",
        .name = "subexample",
        .run = subcommandRun,
    });
    try root_command.addCommand(subcommand);
    try root_command.addOption(Option{
        .short = "e",
        .long = "example",
        .description = "example option",
        .value_type = .INT,
        .value_int = 3,
    });
    try root_command.execute();
}