|
|
|
Sunday, 28 February 2010 23:22 |
// description of your code here
class OptParseSimple
def initialize(filename, args)
doc = Document.new(File.open('options.xml','r').read)
@options = XPath.match(doc.root, 'records/option[switch!=""]')
switches = @options.map do |option|
switch = option.text('switch')
switch[0] == '-' ? switch : nil
end
switches.compact!
# split the argument switches if grouped e.g. -ltr
args.map! do |arg|
if arg[/^\-[a-zA-Z]+$/] and switches.grep(/#{arg}/).empty? then
arg[1..-1].scan(/./).map {|x| '-' + x}
else
arg
end
end
args.flatten!
a1 = options_match(@options[0], args).flatten.each_slice(2).map {|x| x if x[0]}.compact
options_remaining = XPath.match(doc.root, 'records/option[switch=""]/name/text()')
a2 = args.zip(options_remaining).map(&:reverse)
if a2.map(&:first).all? then
@h = Hash[*(a1+a2).map{|x,y| [x.to_s.to_sym, y]}.flatten]
else
invalid_option = a2.detect {|x,y| x.nil? }.last
raise "invalid option: %s not recognised" % invalid_option
end
end
def to_h()
@h
end
private
def options_match(option, args)
switch, switch_alias = option.text('switch'), option.text('alias')
switch_pattern = switch_alias ? "(%s|%s)" % [switch, switch_alias] : switch
switch_matched, arg_index = args.each_with_index.detect {|x,j| x[/^#{switch_pattern}/]}
key, value = nil
if switch_matched then
value_pattern = option.text('value')
if value_pattern then
# check for equal sign
value = switch_matched[/\=(#{value_pattern})/,1]
# check the next arg
if value.nil? and args.length > 0 then
next_arg = args[arg_index + 1]
# check to make sure it's not the next switch
next_option = @options[1] if @options.length > 1
if next_arg != next_option then
# validate using the regex
value = next_arg[/#{value_pattern}/]
if value then
args.delete_at(arg_index + 1)
else
raise option.text('errors/records/error[last()]')
end
end
else
args.delete_at(arg_index)
end
else
args.delete_at(arg_index)
end
key = option.text('name')
elsif option.text('mandatory').downcase == 'true' then
raise option.text('errors/records/error')
end
pair = [key, value]
@options.shift
next_pair = options_match(@options[0], args) if @options.length > 0
[pair, next_pair]
end
end
 Read more: |
|
Sunday, 28 February 2010 23:22 |
// Using an XML file to define options OptParseSimple
class OptParseSimple
def initialize(filename, args)
doc = Document.new(File.open('options.xml','r').read)
@options = XPath.match(doc.root, 'records/option[switch!=""]')
switches = @options.map do |option|
switch = option.text('switch')
switch[0] == '-' ? switch : nil
end
switches.compact!
# split the argument switches if grouped e.g. -ltr
args.map! do |arg|
if arg[/^\-[a-zA-Z]+$/] and switches.grep(/#{arg}/).empty? then
arg[1..-1].scan(/./).map {|x| '-' + x}
else
arg
end
end
args.flatten!
a1 = options_match(@options[0], args).flatten.each_slice(2).map {|x| x if x[0]}.compact
options_remaining = XPath.match(doc.root, 'records/option[switch=""]/name/text()')
a2 = args.zip(options_remaining).map(&:reverse)
if a2.map(&:first).all? then
@h = Hash[*(a1+a2).map{|x,y| [x.to_s.to_sym, y]}.flatten]
else
invalid_option = a2.detect {|x,y| x.nil? }.last
raise "invalid option: %s not recognised" % invalid_option
end
end
def to_h()
@h
end
private
def options_match(option, args)
switch, switch_alias = option.text('switch'), option.text('alias')
switch_pattern = switch_alias ? "(%s|%s)" % [switch, switch_alias] : switch
switch_matched, arg_index = args.each_with_index.detect {|x,j| x[/^#{switch_pattern}/]}
key, value = nil
if switch_matched then
value_pattern = option.text('value')
if value_pattern then
# check for equal sign
value = switch_matched[/\=(#{value_pattern})/,1]
# check the next arg
if value.nil? and args.length > 0 then
next_arg = args[arg_index + 1]
# check to make sure it's not the next switch
next_option = @options[1] if @options.length > 1
if next_arg != next_option then
# validate using the regex
value = next_arg[/#{value_pattern}/]
if value then
args.delete_at(arg_index + 1)
else
raise option.text('errors/records/error[last()]')
end
end
else
args.delete_at(arg_index)
end
else
args.delete_at(arg_index)
end
key = option.text('name')
elsif option.text('mandatory').downcase == 'true' then
raise option.text('errors/records/error')
end
pair = [key, value]
@options.shift
next_pair = options_match(@options[0], args) if @options.length > 0
[pair, next_pair]
end
end
 Read more: |
|
