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#!/usr/bin/env ruby
require_relative '../lib/optimist'
opts = Optimist::options do
opt :dog, "user is dog"
opt :cat, "user is cat"
opt :rat, "user is rat"
conflicts :dog, :cat, :rat
opt :wash, "pet wash"
opt :dry, "pet dry"
depends :wash, :dry
opt :credit, "pay creditcard"
opt :cash, "pay cash"
opt :cheque, "pay cheque"
either :credit, :cash, :cheque
end
p opts
# $ ./constraints.rb --dog --cat
# Error: only one of --dog, --cat, --rat can be given.
# $ ./constraints.rb --dog --wash
# Error: --wash, --dry have a dependency and must be given together.
# $ ./constraints.rb --cash --cheque --rat --wash --dry
# Error: one and only one of --credit, --cash, --cheque is required.
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