OptionParser Generator

Small gem which generates an OptionParser object from an OpenStruct.

Installation

gem install optsparser_generator

Usage

require 'optsparser_generator'
# step one define OpenStruct with default and special values
os = OpenStruct.new
os.default = 'value'
os.val = 123
os.val__values = [1, 1.5, 2, 123]
os.val__class = Numeric
os.val__required = true
os.bool = true
os.bool__help = 'description of argument'
os.bool__short = 'b'
os.test = "don't know"
os.test__proc = Proc.new do |value|
	puts value
	"some-#{value}-conversion"
end
os.freeze

# step two generate OptionParser
opt_parser = OptParseGen(os)
opt_parser = OptionParserGenerator(os)
opt_parser.parse!(ARGV)
# or parse options directly
OptParseGen.parse(os) # takes ARGV or an array

Special values

• __help defines the description for a property
• __values defines possible values in an Array
• __short defines the short trigger
• __class defines the Class which OptionParser then tries to coerce to
• __proc a Proc which will be executed to compute the value
• __required parameter is required, raises error if missing

Version numbers

I choose two digit version numbers. The first digit indicates breaking changes. Second digit increases per release.

Enjoy