Would be nice if long descriptions were handled better

Consider:

require 'optparse'

options = {}

OptionParser.new do |opts|
  opts.banner = "Usage: #{$0} [options]"

  opts.on('-d', '--do-thing', 'Do a thing') do
    options[:do] = true
  end
  opts.on('-l', '--long-option', 'Here\'s an option with a pretty long description in order to see what OptionParser does with options with pretty long descriptions when the pretty long description is pretty long.') do
    options[:long] = l
  end
  opts.on('-s COUNT', '--do-some-more-things=COUNT', 'Do some more things') do |count|
    options[:more] = count
  end
end.parse!

p options
p ARGV

Then:

$ ruby opts.rb -h
Usage: opts.rb [options]
    -d, --do-thing                   Do a thing
    -l, --long-option                Here's an option with a pretty long description in order to see what OptionParser does with opt
ions with pretty long descriptions when the pretty long description is pretty long.
    -s, --do-some-more-things=COUNT  Do some more things

(I purposely wrapped it as I’d see it in a 132 column terminal window.)

It would be nice if OptionParser handled that better, getting the current terminal width and wrapping the description intelligently:

Usage: opts.rb [options]
    -d, --do-thing                   Do a thing
    -l, --long-option                Here's an option with a pretty long description in order to see what OptionParser does with
                                     options with pretty long descriptions when the pretty long description is pretty long.
    -s, --do-some-more-things=COUNT  Do some more things

I often write descriptions that would wrap in a 132 (or even more in an 80) column terminal window. When I manually write usages I handle that, but being OptionParser handles usage for me (very handy!) it would be nice if it did too.

Commencez par la sortie d’aide de OptionParser affichée pour opts.rb et suivez le chemin de formatage utilisé par -h. Implémentez le retour à la ligne des descriptions d’options longues en fonction de la largeur du terminal, tout en préservant l’indentation affichée, puis vérifiez que la sortie d’exemple est correctement répartie sur plusieurs lignes.