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require 'gli/command_line_token.rb'
module GLI
# Defines a flag, which is to say a switch that takes an argument
class Flag < Switch
attr_reader :default_value
def initialize(names,description,argument_name=nil,default=nil,long_desc=nil)
super(names,description,long_desc)
@argument_name = argument_name || "arg"
@default_value = default
end
def get_value!(args)
args.each_index() do |index|
arg = args[index]
present,matched,value = find_me(arg)
if present
args.delete_at index
if !value || value == ''
if args[index]
value = args[index]
args.delete_at index
return value
else
raise "#{matched} requires an argument"
end
else
return value
end
end
end
return @default_value
end
def find_me(arg)
if @names[arg]
return [true,arg,nil] if arg.length == 2
# This means we matched the long-form, but there's no argument
raise "#{arg} requires an argument via #{arg}=argument"
end
@names.keys.each() do |name|
match_string = "^#{name}=(.*)$"
match_data = arg.match(match_string)
return [true,name,$1] if match_data;
end
[false,nil,nil]
end
# Returns a string of all possible forms
# of this flag. Mostly intended for printing
# to the user.
def all_forms(joiner=', ')
forms = all_forms_a
string = forms.join(joiner)
if forms[-1] =~ /^\-\-/
string += '='
else
string += ' '
end
string += @argument_name
return string
end
end
end
Version data entries
15 entries across 15 versions & 3 rubygems