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 28

def initialize
  # options applicable to all subcommands
  @for_all = []
  @subcommands = {}
  @aliases = {}
  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 46

def for_all &block
  @for_all.push block
end

#parse(args = ARGV) ⇒ Object 



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# File 'lib/moister.rb', line 131

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

#parse!(args = ARGV) ⇒ Object 



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# File 'lib/moister.rb', line 70

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

    subcmd_config = @config[cmd] = {}
    positionals = OptionParserExtra.new(@config[cmd]) 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

    positionals_meta = subcmd_meta[:positionals]
    if positionals_meta
      positionals_meta.each do |positional_meta|
        array_match = false
        optional = if positional_meta =~ /^\[.+\]$/
          optional = true
          positional_meta = positional_meta[1..-2]
        end

        positional_name = if positional_meta =~ /^\*[a-z\-]+$/
          array_match = true
          positional_meta[1..-1]
        else
          positional_meta
        end

        if array_match
          if positionals.empty?
            if optional
              subcmd_config[positional_name] = []
              next
            end
            raise "`#{cmd}' subcommand requires at least one `#{positional_name}' parameter"
          end
          subcmd_config[positional_name] = positionals
          positionals = []
        else
          if positionals.empty?
            next if optional
            raise "`#{cmd}' subcommand requires `#{positional_name}' parameter"
          end
          subcmd_config[positional_name] = positionals.shift
        end
      end
    end

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

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



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# File 'lib/moister.rb', line 36

def subcommand name, banner, &block
  name, *positionals = name.split ' '
  name, *aliases = name.split(',')
  subcmd = { name: name, banner: banner, parse_cmdline: block }
  subcmd[:positionals] = positionals unless positionals.empty?
  @subcommands[name] = subcmd
  aliases.each { |_alias| @aliases[_alias] = name }
end

#to_s ⇒ Object Also known as: help 



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# File 'lib/moister.rb', line 50

def to_s
  ret = super
  prefixes = @subcommands.values.map do |subcmd|
    prefix = subcmd[:name]
    prefix +=  ' ' + subcmd[:positionals].join(' ') if subcmd.has_key? :positionals
    prefix
  end
  max_len = prefixes.map(&:length).max

  ret += "\ncommands:\n"
  @subcommands.values.each_with_index do |subcmd, idx|
    prefix = prefixes[idx]
    prefix += ' ' * (max_len - prefix.length + 2)
    ret += "    #{prefix}  #{subcmd[:banner]}\n"
  end
  ret
end