Zig Argument Parser

Simple-to-use argument parser with struct-based config

Features

• Automatic option generation from a config struct
• Familiar look & feel:
  • Everything after the first -- is assumed to be a positional argument
  • A single - is interpreted as a positional argument which can be used as the stdin/stdout file placeholder
  • Short options with no argument can be combined into a single argument: -dfe
  • Long options can use either --option=value or --option value syntax (use --option=-- if you need -- as a long option argument)
  • verbs (sub-commands), with verb specific options. Non-verb specific (global) options can come before or after the verb on the command line. Non-verb option arguments are processed before determining verb. (see demo_verb.zig)
• Integrated support for primitive types:
  • All integer types (signed & unsigned)
  • Floating point types
  • Booleans (takes optional argument. If no argument given, the bool is set, otherwise, one of yes, true, y, no, false, n is interpreted)
  • Strings
  • Enumerations

Example

constoptions=argsParser.parseForCurrentProcess(struct {
// This declares long options for double hyphenoutput: ?[]constu8=null,
@"with-offset": bool=false,
@"with-hexdump": bool=false,
@"intermix-source": bool=false,
numberOfBytes: ?i32=null,
signed_number: ?i64=null,
unsigned_number: ?u64=null,
mode: enum { default, special, slow, fast } =.default,
// This declares short-hand options for single hyphenpubconstshorthands= .{
.S="intermix-source",
.b="with-hexdump",
.O="with-offset",
.o="output",
};
}, argsAllocator, .print) catchreturn1;
deferoptions.deinit();
std.debug.print("executable name: {?s}\n", .{options.executable_name});
std.debug.print("parsed options:\n", .{});
inlinefor (std.meta.fields(@TypeOf(options.options))) |fld| {
std.debug.print("\t{s} = {any}\n", .{
fld.name,
@field(options.options, fld.name),
});
}
std.debug.print("parsed positionals:\n", .{});
for (options.positionals) |arg| {
std.debug.print("\t'{s}'\n", .{arg});
}