const std = @import("std");

pub fn main() !void {
    const io = std.Io.Threaded.global_single_threaded.ioBasic();
    var args = try std.process.argsWithAllocator(std.heap.page_allocator);
    _ = args.skip();
    const dir_name = args.next().?;
    const dir = try std.Io.Dir.cwd().openDir(io, if (std.mem.startsWith(u8, dir_name, "--dir="))
        dir_name["--dir=".len..]
    else
        dir_name, .{});
    const file_name = args.next().?;
    const file = try dir.createFile(io, file_name, .{});
    var file_writer = file.writer(io, &.{});
    try file_writer.interface.print(
        \\{s}
        \\{s}
        \\Hello, world!
        \\
    , .{ dir_name, file_name });
}