cmdline workflows should translate into real workflows

A potential syntax...

require 'yaml'

workflow = [
  ['a', 'a1', 'a2', {'key' => 'value', 'another' => 'value', 'name' => 'blah'}],
  ['b', 'b1'],
  ['c'],
  "+2[1,2,3]",
  "1:2:3",
  "3[4,5,6]"
]

command = workflow.collect do |argv|
  case argv
  when Array
    argv.collect do |arg|
      case arg
      when Hash then arg.to_a.collect {|k,v| "--#{k} #{v}" }
      else arg.to_s
      end
    end.flatten.join(' ')
  else argv.to_s
  end
end

puts command.join(" -- ")
# a a1 a2 --name blah --another value --key value -- b b1 -- c -- +2[1,2,3] -- 1:2:3 -- 3[4,5,6]

puts workflow.to_yaml
# ---
# - - a
#   - a1
#   - a2
#   - name: blah
#     another: value
#     key: value
# - - b
#   - b1
# - - c
# - +2[1,2,3]
# - "1:2:3"
# - 3[4,5,6]