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way to parse knife exec options
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require 'awesome_print' | |
require 'trollop' | |
def convert_input(arguments) | |
arguments.reject do |option| | |
option !~ /^[a-z]+:[a-z]{2,}-*[a-z]*-*\d*$/ | |
end.map do |option| | |
opt, value = option.split(':') | |
[ '--' + opt, value ] | |
end.flatten | |
end | |
parser = Trollop::Parser.new do | |
opt :region, "Region to use", :default => "eu-west-1" | |
opt :release, "Release name", :default => "lucid" | |
opt :group, "Security group", :default => "default" | |
opt :size, "Size of instance", :default => "small" | |
opt :key, "Name of AWS keypair", :default => "gsg-opseng" | |
opt :ebs, "Should the instance be EBS backed?", :default => "no" | |
end | |
opts = Trollop::with_standard_exception_handling parser do | |
converted_args = convert_input(ARGV) | |
raise Trollop::HelpNeeded if converted_args.empty? # show help screen | |
o = parser.parse converted_args | |
o | |
end | |
ap opts | |
exit 0 |
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