optparsing.rb

optparsing.rb

#!/usr/bin/env ruby
require 'optparse'
require 'pp'

options = {}
parser = OptionParser.new do |opts|
  opts.banner = "Usage: example.rb [options]"

  opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
    options[:verbose] = v
  end

  opts.on("-i", "--integer=int", Integer, "gives integer") do |v|
    options[:integer] = v
  end
end

pr = proc do |event, file, line, id, binding, classname|
    puts("TraceALLThings (%8s) %s:%-2d %s#%s\n" % [event, file, line, classname, id])
end
# set_trace_func(pr)
parser.parse!

puts parser
p options
p ARGV

look into: https://rosettacode.org/wiki/Parse_command-line_arguments#Ruby_with_.27optparse.27

and http://ruby-doc.org/stdlib-2.3.1/libdoc/optparse/rdoc/OptionParser.html#class-OptionParser-label-Type+Coercion