Class: Thor::Options

Inherits:
Arguments show all
Defined in:
lib/thor/parser/options.rb

Overview

:nodoc:

Constant Summary collapse

LONG_RE = 
/^(--\w+(?:-\w+)*)$/
SHORT_RE = 
/^(-[a-z])$/i
EQ_RE = 
/^(--\w+(?:-\w+)*|-[a-z])=(.*)$/i
SHORT_SQ_RE =

Allow either -x -v or -xv style for single char args

/^-([a-z]{2,})$/i
SHORT_NUM = 
/^(-[a-z])#{NUMERIC}$/i
OPTS_END = 
"--".freeze

Constants inherited from Arguments

Arguments::NUMERIC

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Arguments

parse, split

Constructor Details

#initialize(hash_options = {}, defaults = {}, stop_on_unknown = false, disable_required_check = false, relations = {}) ⇒ Options

Takes a hash of Thor::Option and a hash with defaults.

If stop_on_unknown is true, #parse will stop as soon as it encounters an unknown option or a regular argument.



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# File 'lib/thor/parser/options.rb', line 32

def initialize(hash_options = {}, defaults = {}, stop_on_unknown = false, disable_required_check = false, relations = {})
  @stop_on_unknown = stop_on_unknown
  @exclusives = (relations[:exclusive_option_names] || []).select{|array| !array.empty?}
  @at_least_ones = (relations[:at_least_one_option_names] || []).select{|array| !array.empty?}
  @disable_required_check = disable_required_check
  options = hash_options.values
  super(options)

  # Add defaults
  defaults.each do |key, value|
    @assigns[key.to_s] = value
    @non_assigned_required.delete(hash_options[key])
  end

  @shorts = {}
  @switches = {}
  @extra = []
  @stopped_parsing_after_extra_index = nil
  @is_treated_as_value = false

  options.each do |option|
    @switches[option.switch_name] = option

    option.aliases.each do |name|
      @shorts[name] ||= option.switch_name
    end
  end
end

Class Method Details

.to_switches(options) ⇒ Object

Receives a hash and makes it switches.



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# File 'lib/thor/parser/options.rb', line 11

def self.to_switches(options)
  options.map do |key, value|
    case value
    when true
      "--#{key}"
    when Array
      "--#{key} #{value.map(&:inspect).join(' ')}"
    when Hash
      "--#{key} #{value.map { |k, v| "#{k}:#{v}" }.join(' ')}"
    when nil, false
      nil
    else
      "--#{key} #{value.inspect}"
    end
  end.compact.join(" ")
end

Instance Method Details

#check_at_least_one! ⇒ Object 



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# File 'lib/thor/parser/options.rb', line 156

def check_at_least_one!
  opts = @assigns.keys
  # When at least one is required of the options A and B,
  # if the both options were not given, none? would be true.
  found = @at_least_ones.find{ |one_reqs| one_reqs.none?{ |o| opts.include? o} }
  if found
    names = names_to_switch_names(found).map{|n| "'#{n}'"}
    class_name = self.class.name.split("::").last.downcase
    fail AtLeastOneRequiredArgumentError, "Not found at least one of required #{class_name} #{names.join(", ")}"
  end
end

#check_exclusive! ⇒ Object 



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# File 'lib/thor/parser/options.rb', line 144

def check_exclusive!
  opts = @assigns.keys
  # When option A and B are exclusive, if A and B are given at the same time,
  # the diffrence of argument array size will decrease.
  found = @exclusives.find{ |ex| (ex - opts).size < ex.size - 1 }
  if found
    names = names_to_switch_names(found & opts).map{|n| "'#{n}'"}
    class_name = self.class.name.split("::").last.downcase
    fail ExclusiveArgumentError, "Found exclusive #{class_name} #{names.join(", ")}"
  end
end

#check_unknown! ⇒ Object

Raises:



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# File 'lib/thor/parser/options.rb', line 168

def check_unknown!
  to_check = @stopped_parsing_after_extra_index ? @extra[0...@stopped_parsing_after_extra_index] : @extra

  # an unknown option starts with - or -- and has no more --'s afterward.
  unknown = to_check.select { |str| str =~ /^--?(?:(?!--).)*$/ }
  raise UnknownArgumentError.new(@switches.keys, unknown) unless unknown.empty?
end

#parse(args) ⇒ Object

rubocop:disable Metrics/MethodLength



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# File 'lib/thor/parser/options.rb', line 89

def parse(args) # rubocop:disable Metrics/MethodLength
  @pile = args.dup
  @is_treated_as_value = false
  @parsing_options = true

  while peek
    if parsing_options?
      match, is_switch = current_is_switch?
      shifted = shift

      if is_switch
        case shifted
        when SHORT_SQ_RE
          unshift($1.split("").map { |f| "-#{f}" })
          next
        when EQ_RE
          unshift($2, is_value: true)
          switch = $1
        when SHORT_NUM
          unshift($2)
          switch = $1
        when LONG_RE, SHORT_RE
          switch = $1
        end

        switch = normalize_switch(switch)
        option = switch_option(switch)
        result = parse_peek(switch, option)
        assign_result!(option, result)
      elsif @stop_on_unknown
        @parsing_options = false
        @extra << shifted
        @stopped_parsing_after_extra_index ||= @extra.size
        @extra << shift while peek
        break
      elsif match
        @extra << shifted
        @extra << shift while peek && peek !~ /^-/
      else
        @extra << shifted
      end
    else
      @extra << shift
    end
  end

  check_requirement! unless @disable_required_check
  check_exclusive!
  check_at_least_one!

  assigns = Thor::CoreExt::HashWithIndifferentAccess.new(@assigns)
  assigns.freeze
  assigns
end

#peek ⇒ Object 



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# File 'lib/thor/parser/options.rb', line 65

def peek
  return super unless @parsing_options

  result = super
  if result == OPTS_END
    shift
    @parsing_options = false
    @stopped_parsing_after_extra_index ||= @extra.size
    super
  else
    result
  end
end

#remaining ⇒ Object 



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# File 'lib/thor/parser/options.rb', line 61

def remaining
  @extra
end

#shift ⇒ Object 



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# File 'lib/thor/parser/options.rb', line 79

def shift
  @is_treated_as_value = false
  super
end

#unshift(arg, is_value: false) ⇒ Object 



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# File 'lib/thor/parser/options.rb', line 84

def unshift(arg, is_value: false)
  @is_treated_as_value = is_value
  super(arg)
end