FSharp.CommandLine 1.0.3025.10813

FSharp.CommandLine

The FSharp.CommandLine library can be installed from NuGet

  PM> Install-Package FSharp.CommandLine

FSharp.CommandLine is a monadic commandline application framework that automatically generates both help texts and shell suggestions.

This library also contains type-safe scanf and type-safe commandline option parser.

Example

open System
open FSharp.CommandLine
open FSharp.CommandLine.Options
open FSharp.CommandLine.Commands

let fileOption =
  commandOption {
    names ["f"; "file"]
    description "Name of a file to use (Default index: 0)"
    takes (format("%s:%i").withNames ["filename"; "index"])
    takes (format("%s").map (fun filename -> (filename, 0)))
    suggests (fun _ -> [CommandSuggestion.Files None])
  }

type Verbosity = Quiet | Normal | Full | Custom of int

let verbosityOption =
  commandOption {
    names ["v"; "verbosity"]
    description "Display this amount of information in the log."
    takes (regex @"q(uiet)?$" |> asConst Quiet)
    takes (regex @"n(ormal)?$" |> asConst Quiet)
    takes (regex @"f(ull)?$" |> asConst Full)
    takes (format("custom:%i").map (fun level -> Custom level))
    takes (format("c:%i").map (fun level -> Custom level))
  }

let mainCommand () =
  command {
    name "main"
    description "The main command."
    let! files = fileOption |> CommandOptionUtils.zeroOrMore
    let! verbosity = verbosityOption |> CommandOptionUtils.zeroOrExactlyOne 
                                     |> CommandOptionUtils.whenMissingUse Normal
    preprocess
    do printfn "%A, %A" files verbosity
    return 0
  }

[<EntryPoint>]
let main argv =
  mainCommand() |> Command.runAsEntryPoint argv

Samples & documentation

The library comes with comprehensible documentation. It can include tutorials automatically generated from *.fsx files in the content folder. The API reference is automatically generated from Markdown comments in the library implementation.

• Tutorial contains a further explanation of this sample library.

• API Reference contains automatically generated documentation for all types, modules and functions in the library. This includes additional brief samples on using most of the functions.

Contributing and copyright

The project is hosted on GitHub where you can report issues, fork the project and submit pull requests. If you're adding a new public API, please also consider adding samples that can be turned into a documentation. You might also want to read the library design notes to understand how it works.

The library is available under Public Domain license, which allows modification and redistribution for both commercial and non-commercial purposes. For more information see the License file in the GitHub repository.