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commandry

commandry is a command line parser for Standard ML.

val cli: string Cli.parser =
  Cli.app "hello" "1.0.0" "Says hello to someone"
    (fn name => name)
    |> Cli.positional {name = "name", help = "Someone's name"}
    |> Cli.cli

fun main () =
  Cli.exec (fn name => print ("Hello, " ^ name)) cli

Features

  • Declarative builder pattern: Construct command line by chaining functions together
  • Rich argument types: Supports flags, string/int options with defaults, and positional arguments (required, optional or variadic)
  • Nested subcommands: Create hierarchical command structures
  • Auto-generated help: Automatic --help and --version flags with formatted usage text

Installation

The library is a single file, copy src/cli.sml into your project.

Documentation

See the docs/ directory for detailed guides: