rules/cp.zig (8 lines of code) (raw):

const std = @import("std"); pub fn main() !void { var gpa = std.heap.GeneralPurposeAllocator(.{}){}; const argv = try std.process.argsAlloc(gpa.allocator()); defer std.process.argsFree(gpa.allocator(), argv); if (argv.len != 3) return error.InvalidUsage; try std.fs.cwd().copyFile(argv[1], std.fs.cwd(), argv[2], .{}); }