Well, I'm sure there are huge libraries that do this, and make documentation for you and all that, but here's my quick one:
| Ruby: | args = [ ]
ARGV.each do |a|
if a[0,2] == "--"
key = a[2..-1].split "="
if $prefs.has_key? key[0]
$prefs[key[0]] = (key[1] or true) #Sets option to true if no value given
else
$stderr.puts "Error: No option '#{key[0]}'"
end
else
args.push a
end
end |
To use it, make a hash called $prefs holding the default values for all your preferences. When the program is run, it goes through each argument and if it starts with "--" then it checks if that key is in prefs, if it is it changes the value with the part after = (or true if they give nothing after), or else it dies telling the user that that is an invalid option. If it doesn't start with "--", it is pushed onto args. args now contains all your unnamed arguments, and prefs the named ones. |