ArgParser

command line argument parser

utils
command line
parser
moon add Yoorkin/ArgParser@0.2.1
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Author
Version
0.2.1
License
Apache-2.0
Last updated
6 months ago
Downloads
102K

Dependencies

README

#ArgParser

A simple command-line parser for MoonBit. It uses a declarative style to specify the command-line interface.

#Usage

test {
let argv = ["-o", "out.mbt", "file1", "file2", "--verbose"]
let verbose = @ref.new(false)
let output = @ref.new("output")
let files = []
let usage =
#| Simple CLI tool
#| usage:
#| mytool [options] <file1> [<file2>] ... -o <output>
#|
@ArgParser.parse(
[
("--verbose", "-v", Set(verbose), "enable verbose message"),
("--output", "-o", Set_string(output), "output file name"),
],
file => files.push(file),
usage,
argv,
)
inspect(verbose.val, content="true")
inspect(output.val, content="out.mbt")
inspect(files[0], content="file1")
inspect(files[1], content="file2")
}

#help options

ArgParser will automatically generate --help and -h options.

#Related Libraries

Looking for more powerful CLI tool? Check out clap.

#
Spec

pub(all) enum Spec {
Unit(() -> Unit)
String((String) -> Unit)
Set_string(Ref[String])
Set(Ref[Bool])
Clear(Ref[Bool])
}

Matched option handler that used to interpret options.

Unit - handle with callback

String - handle associated value with callback

Set_string - set option to associated value

Set - set reference to true

Clear - set reference to false

#
parse

fn parse(speclist : Array[(String, String, Spec, String)], rest : (String) -> Unit, usage_msg : String, argv : Array[String]) -> Unit

Parse argument list for CLI tools

Match OptionName or LongOptionName then interpret with Spec and use Description to generate -h or --help options message.

speclist - (LongOptionName, OptionName, Spec, Description) of Array

rest - rest arguments handler

usage_msg - synopsis usage

argv - input argument list

Source Files

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