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This repository was archived by the owner on Apr 1, 2020. It is now read-only.
Better command line argument parsing using D's powerful compile-time codegeneration facilities.
Note: This is a stable library, but it is no longer maintained. If you'dlike to help out with maintanence please make an issue letting me know!
Example
importstd.stdio;import darg;structOptions{ @Option("help","h") @Help("Prints this help.") OptionFlag help; @Option("threads","t") @Help("Number of threads to use.")size_t threads; @Argument("file", Multiplicity.zeroOrMore) @Help("Input files")string[] files;}// Generate the usage and help string at compile time.immutable usage = usageString!Options("example");immutable help = helpString!Options;intmain(string[] args){ Options options;try { options = parseArgs!Options(args[1.. $]); }catch (ArgParseError e) { writeln(e.msg); writeln(usage);return1; }catch (ArgParseHelp e) {// Help was requested writeln(usage); write(help);return0; }foreach (f; options.files) {// Use files }return0;}
$ ./example --helpUsage: example [--help] [--threads=<ulong>] [file...]Positional arguments: file Input filesOptional arguments: --help, -h Prints this help. --threads, -t <ulong> Number of threads to use.$ ./example --foobarUnknown option '--foobar'Usage: program [--help] [--threads=<ulong>] [file...]
