extract_daemon_process_parameters.rb

# with Daemons, extract the params. for the daemonized process
#
# Input  : 
#          ["run", "--", "--source=/tmp/sour", "--archive=/tmp/arch"]
#                    ^             ^^^^^^^^^              ^^^^^^^^^
#                    |              :source                :archive
#              the separator
#
# Output : 
#          {:source=>"/tmp/sour", :archive=>"/tmp/arch"}
#

def extract_process_params(argv)
  return {} unless argv.include?('--')

  idx         = argv.index('--')
  argv_useful = argv[idx+1..-1]
  # argv_useful = ["--source=/tmp/sour", "--archive=/tmp/arch"]

  choices_a = (argv_useful || []).collect do |p|
    if p =~ /--source=(.*)/
      [:source, $1]
    elsif p =~ /--archive=(.*)/
      [:archive, $1]
    end
  end.compact
  # choices_a = [[:source, "/tmp/sour"], [:archive, "/tmp/arch"]]

  choices_h = Hash[*choices_a.flatten]
  # {:source=>"/tmp/sour", :archive=>"/tmp/arch"}
end

argv = ["run", "--", "--source=/tmp/sour", "--archive=/tmp/arch"]
puts extract_process_params(argv).inspect