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@postmodern
Last active December 31, 2015 05:19
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Experiment to see if OptionParser allows options to define other options. Turns out you can!
require 'optparse'
options = OptionParser.new("usage: #{$0}") do |opts|
opts.on('-f','--file FILE','loads a file') do |file|
puts "loading file #{file}"
opts.separator "#{file} options:"
opts.on('-c','--custom') do
puts "custom option defined by file #{file}"
end
end
end
options.parse(ARGV)
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$ ruby test.rb -f foo
loading file foo
$ ruby test.rb -f foo -c
loading file foo
custom option defined by file foo
$ ruby test.rb --help
usage: test.rb
    -f, --file FILE                  loads a file
$ ruby test.rb -f foo --help
loading file foo
usage: test.rb
    -f, --file FILE                  loads a file
foo options:
    -c, --custom

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