Class: Moister::SubcommandOptionParser

Inherits:
OptionParserExtra show all
Defined in:
lib/moister.rb

Instance Method Summary collapse

Methods inherited from OptionParserExtra

#on

Constructor Details

#initialize ⇒ SubcommandOptionParser

Returns a new instance of SubcommandOptionParser.



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# File 'lib/moister.rb', line 27

def initialize
  # options applicable to all subcommands
  @for_all = []
  @subcommands = {}
  super
end

Instance Method Details

#for_all(&block) ⇒ Object

add a block to configure every subcommand



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# File 'lib/moister.rb', line 39

def for_all &block
  @for_all.push block
end

#parse(args = ARGV) ⇒ Object 



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# File 'lib/moister.rb', line 79

def parse(args = ARGV)
  parse! args.clone
end

#parse!(args = ARGV) ⇒ Object 



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# File 'lib/moister.rb', line 57

def parse!(args = ARGV)
  apply_for_all self
  order! args
  if args.empty?
    ParseResults.new(nil, [], @config)
  else
    cmd = args.first
    subcmd_meta = @subcommands[cmd]
    raise "invalid subcommand: #{cmd}" unless @subcommands.has_key? cmd
    args.shift

    positionals = OptionParserExtra.new(@config) do |subop|
      apply_for_all subop
      subop.banner = subcmd_meta[:banner]
      parse_cmdline = subcmd_meta[:parse_cmdline]
      parse_cmdline.call(subop) if parse_cmdline
    end.order! args

    ParseResults.new(cmd, positionals, @config)
  end
end

#subcommand(name, banner, &block) ⇒ Object 



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# File 'lib/moister.rb', line 34

def subcommand name, banner, &block
  @subcommands[name] = { name: name, banner: banner, parse_cmdline: block }
end

#to_s ⇒ Object Also known as: help 



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# File 'lib/moister.rb', line 43

def to_s
  ret = super
  max_len = @subcommands.values.map { |subcmd| subcmd[:name].length }.max
  ret += "\ncommands:\n"
  @subcommands.values.each do |subcmd|
    prefix = subcmd[:name]
    prefix += ' ' * (max_len - prefix.length + 2)
    ret += "    #{prefix}  #{subcmd[:banner]}\n"
  end
  ret
end