class Utils::CommandParser
Similar to Ruby's OptionParser However, this is customized for angular_init
Attributes
args[R]
name[RW]
separator[RW]
version[RW]
Public Class Methods
new() { |self| ... }
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# File lib/ngi/utils/command_parser.rb, line 26 def initialize # TODO: to "Usage #{file_name}", etc. @name = '<CLI>' @banner = "Usage: #{@name} <command>" @version = '0.0.0' @separator = '====================' @listeners = [] # automatically register some listeners register_help register_version # be able to pass in a block for setup yield(self) if block_given? end
Public Instance Methods
name=(name)
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# File lib/ngi/utils/command_parser.rb, line 42 def name=(name) # need to also replace the name in the banner @banner = @banner.gsub(@name, name) @name = name end
on(options, description = '', &block)
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register the listeners
# File lib/ngi/utils/command_parser.rb, line 50 def on(options, description = '', &block) listener = {} # be able to pass in a single argument, or an array of arguments options = *options unless options.is_a? Array listener[:options] = options.map do |opt| opt.strip.split(' ') end listener[:block] = block listener[:description] = description @listeners << listener end
parse(args)
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# File lib/ngi/utils/command_parser.rb, line 66 def parse(args) # puts @listeners matched_listener = { options: nil, block: nil } @listeners.each do |listener| listener[:options].each do |opt_arr| if opt_arr == args matched_listener[:options] = opt_arr matched_listener[:block] = listener[:block] break end end end if !matched_listener[:options].nil? # matched_listener[:options] should always be an array # when we call, we can each member of that array to be # passed separately matched_listener[:block].call(*matched_listener[:options]) else # if there was no match, show the help menu parse(['-h']) end end
register_help()
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# File lib/ngi/utils/command_parser.rb, line 94 def register_help # automaticaly register this listener on(['-h', '--help'], 'Show the help menu') do Output.new(@separator).to_s Output.new(@banner).to_s @listeners.each_with_index do |listener, i| desc = "\n" << "(#{i + 1}) #{listener[:description]}: " desc << "#{listener[:options].join(', ')}" Output.new(desc).to_s end Output.new(@separator).to_s end end
register_version()
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# File lib/ngi/utils/command_parser.rb, line 109 def register_version # automaticaly register this listener on(['-v', '--version'], 'Show the version') do Output.new("#{@name} #{@version}").to_s end end