ArgParse

Making command line argument parsing more Groovy

Usage

ArgParse provides three ways to accept arguments.

1. Parameters: command --name value or command -n value
2. Flags: command --name or command -n
3. Arguments: command value * Parameters, flags and arguments may be provided in any order, or even mixed together

Example 1

The parameters to parser.parse are equivalent to the command command --parameter value --flag arg

def parser = ArgParser.accepting { p ->
  p.param('parameter', 'p')
  p.flag('flag', 'f')
}

def (options, args) = parser.parse('--parameter', 'value', '--flag', 'arg')

Result:
options == [parameter:'value', flag:true]
args == ['arg']

Example 2

Flags can contain values, in this case a closure that will either truncate or not truncate other arguments. This command is equivalent to command -t something

parser = ArgParser.accepting { p ->
  p.flag('truncate', 't', default:{it}){{arg->arg.take(2)}}
}

def (options, args) = parser.parse('-t', 'something')
args = args.collect{options.truncate(it)}

Result:
options == [truncate:{arg->arg.take(2)}]
args == ['so']