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Module: Bundler::Thor::Base::ClassMethods

Relationships & Source Files
Defined in: lib/bundler/vendor/thor/lib/thor/base.rb

Instance Attribute Summary

Instance Method Summary

Instance Attribute Details

#exit_on_failure?Boolean (readonly)

A flag that makes the process exit with status 1 if any error happens.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 520

def exit_on_failure?
  Bundler::Thor.deprecation_warning "Bundler::Thor exit with status 0 on errors. To keep this behavior, you must define `exit_on_failure?` in `#{self.name}`"
  false
end

#no_commands?Boolean (readonly)

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# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 432

def no_commands?
  no_commands_context.entered?
end

Instance Method Details

#all_commands Also known as: #all_tasks

Returns the commands for this ::Bundler::Thor class and all subclasses.

Returns

Hash

An ordered hash with commands names as keys and ::Bundler::Thor::Command objects as values.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 374

def all_commands
  @all_commands ||= from_superclass(:all_commands, Hash.new)
  @all_commands.merge!(commands)
end

#all_tasks

Alias for #all_commands.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 378

alias_method :all_tasks, :all_commands

#allow_incompatible_default_type!

If you want to use defaults that don’t match the type of an option, either specify check_default_type: false or call allow_incompatible_default_type!

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 164

def allow_incompatible_default_type!
  @check_default_type = false
end

#argument(name, options = {})

Adds an argument to the class and creates an attr_accessor for it.

::Bundler::Thor::Arguments are different from options in several aspects. The first one is how they are parsed from the command line, arguments are retrieved from position:

thor command NAME

Instead of:

thor command --name=NAME

Besides, arguments are used inside your code as an accessor (self.argument), while options are all kept in a hash (self.options).

Finally, arguments cannot have type :default or :boolean but can be optional (supplying :optional => :true or :required => false), although you cannot have a required argument after a non-required argument. If you try it, an error is raised.

Parameters

name<Symbol>

The name of the argument.

options<Hash>

Described below.

Options

:desc - Description for the argument. :required - If the argument is required or not. :optional - If the argument is optional or not. :type - The type of the argument, can be :string, :hash, :array, :numeric. :default - Default value for this argument. It cannot be required and have default values. :banner - String to show on usage notes.

Errors

ArgumentError

Raised if you supply a required argument after a non required one.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 236

def argument(name, options = {})
  is_thor_reserved_word?(name, :argument)
  no_commands { attr_accessor name }

  required = if options.key?(:optional)
    !options[:optional]
  elsif options.key?(:required)
    options[:required]
  else
    options[:default].nil?
  end

  remove_argument name

  if required
    arguments.each do |argument|
      next if argument.required?
      raise ArgumentError, "You cannot have #{name.to_s.inspect} as required argument after " \
                          "the non-required argument #{argument.human_name.inspect}."
    end
  end

  options[:required] = required

  arguments << Bundler::Thor::Argument.new(name, options)
end

#arguments

Returns this class arguments, looking up in the ancestors chain.

Returns

Array

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 268

def arguments
  @arguments ||= from_superclass(:arguments, [])
end

#attr_accessor

This method is for internal use only.
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 137

def attr_accessor(*) #:nodoc:
  no_commands { super }
end

#attr_reader

This method is for internal use only.
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 129

def attr_reader(*) #:nodoc:
  no_commands { super }
end

#attr_writer

This method is for internal use only.
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# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 133

def attr_writer(*) #:nodoc:
  no_commands { super }
end

#baseclass (protected)

This method is for internal use only.

SIGNATURE: Sets the baseclass. This is where the superclass lookup finishes.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 670

def baseclass #:nodoc:
end

#basename (protected)

The basename of the program invoking the thor class.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 664

def basename
  File.basename($PROGRAM_NAME).split(" ").first
end

#build_option(name, options, scope) (protected)

This method is for internal use only.

Build an option and adds it to the given scope.

Parameters

name<Symbol>

The name of the argument.

options<Hash>

Described in both class_option and method_option.

scope<Hash>

::Bundler::Thor::Options hash that is being built up

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 581

def build_option(name, options, scope) #:nodoc:
  scope[name] = Bundler::Thor::Option.new(name, {:check_default_type => check_default_type}.merge!(options))
end

#build_options(options, scope) (protected)

This method is for internal use only.

Receives a hash of options, parse them and add to the scope. This is a fast way to set a bunch of options:

build_options :foo => true, :bar => :required, :baz => :string

Parameters

Hash[Symbol => Object]

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 592

def build_options(options, scope) #:nodoc:
  options.each do |key, value|
    scope[key] = Bundler::Thor::Option.parse(key, value)
  end
end

#check_default_type

This method is for internal use only.
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 168

def check_default_type #:nodoc:
  @check_default_type = from_superclass(:check_default_type, nil) unless defined?(@check_default_type)
  @check_default_type
end

#check_default_type!

If you want to raise an error when the default value of an option does not match the type call check_default_type! This will be the default; for compatibility a deprecation warning is issued if necessary.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 158

def check_default_type!
  @check_default_type = true
end

#check_unknown_options

This method is for internal use only.
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 147

def check_unknown_options #:nodoc:
  @check_unknown_options ||= from_superclass(:check_unknown_options, false)
end

#check_unknown_options!

If you want to raise an error for unknown options, call check_unknown_options! This is disabled by default to allow dynamic invocations.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 143

def check_unknown_options!
  @check_unknown_options = true
end

#check_unknown_options?(config) ⇒ Boolean

This method is for internal use only.
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 151

def check_unknown_options?(config) #:nodoc:
  !!check_unknown_options
end

#class_option(name, options = {})

Adds an option to the set of class options

Parameters

name<Symbol>

The name of the argument.

options<Hash>

Described below.

Options

:desc

– Description for the argument.

:required

– If the argument is required or not.

:default

– Default value for this argument.

:group

– The group for this options. Use by class options to output options in different levels.

:aliases

– Aliases for this option. Note: ::Bundler::Thor follows a convention of one-dash-one-letter options. Thus aliases like “-something” wouldn’t be parsed; use either “--something” or “-s” instead.

:type

– The type of the argument, can be :string, :hash, :array, :numeric or :boolean.

:banner

– String to show on usage notes.

:hide

– If you want to hide this option from the help.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 303

def class_option(name, options = {})
  build_option(name, options, class_options)
end

#class_options(options = nil)

Adds a bunch of options to the set of class options.

class_options :foo => false, :bar => :required, :baz => :string

If you prefer more detailed declaration, check class_option.

Parameters

Hash[Symbol => Object]

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 281

def class_options(options = nil)
  @class_options ||= from_superclass(:class_options, {})
  build_options(options, @class_options) if options
  @class_options
end

#class_options_help(shell, groups = {}) (protected)

This method is for internal use only.

Prints the class options per group. If an option does not belong to any group, it’s printed as Class option.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 530

def class_options_help(shell, groups = {}) #:nodoc:
  # Group options by group
  class_options.each do |_, value|
    groups[value.group] ||= []
    groups[value.group] << value
  end

  # Deal with default group
  global_options = groups.delete(nil) || []
  print_options(shell, global_options)

  # Print all others
  groups.each do |group_name, options|
    print_options(shell, options, group_name)
  end
end

#commands Also known as: #tasks

Returns the commands for this ::Bundler::Thor class.

Returns

Hash

An ordered hash with commands names as keys and ::Bundler::Thor::Command objects as values.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 363

def commands
  @commands ||= Hash.new
end

#create_command(meth) (protected) Also known as: #create_task

This method is for internal use only.

SIGNATURE: Creates a new command if valid_command? is true. This method is called when a new method is added to the class.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 675

def create_command(meth) #:nodoc:
end

#create_task(meth) (protected)

Alias for #create_command.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 677

alias_method :create_task, :create_command

#disable_required_check?(command_name) ⇒ Boolean

This method is for internal use only.

If true, option set will not suspend the execution of the command when a required option is not provided.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 182

def disable_required_check?(command_name) #:nodoc:
  false
end

#dispatch(command, given_args, given_opts, config) (protected)

This method is for internal use only.

SIGNATURE: The hook invoked by start.

Raises:

  • (NotImplementedError)
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 685

def dispatch(command, given_args, given_opts, config) #:nodoc:
  raise NotImplementedError
end

#find_and_refresh_command(name) (protected) Also known as: #find_and_refresh_task

This method is for internal use only.

Finds a command with the given name. If the command belongs to the current class, just return it, otherwise dup it and add the fresh copy to the current command hash.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 601

def find_and_refresh_command(name) #:nodoc:
  if commands[name.to_s]
    commands[name.to_s]
  elsif command = all_commands[name.to_s] # rubocop:disable AssignmentInCondition
    commands[name.to_s] = command.clone
  else
    raise ArgumentError, "You supplied :for => #{name.inspect}, but the command #{name.inspect} could not be found."
  end
end

#find_and_refresh_task(name) (protected)

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 610

alias_method :find_and_refresh_task, :find_and_refresh_command

#from_superclass(method, default = nil) (protected)

Retrieves a value from superclass. If it reaches the baseclass, returns default.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 642

def from_superclass(method, default = nil)
  if self == baseclass || !superclass.respond_to?(method, true)
    default
  else
    value = superclass.send(method)

    # Ruby implements `dup` on Object, but raises a `TypeError`
    # if the method is called on immediates. As a result, we
    # don't have a good way to check whether dup will succeed
    # without calling it and rescuing the TypeError.
    begin
      value.dup
    rescue TypeError
      value
    end

  end
end

#group(name = nil)

Defines the group. This is used when thor list is invoked so you can specify that only commands from a pre-defined group will be shown. Defaults to standard.

Parameters

name<String|Symbol>

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 349

def group(name = nil)
  if name
    @group = name.to_s
  else
    @group ||= from_superclass(:group, "standard")
  end
end

#handle_argument_error(command, error, args, arity)

This method is for internal use only.

Raises:

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 510

def handle_argument_error(command, error, args, arity) #:nodoc:
  name = [command.ancestor_name, command.name].compact.join(" ")
  msg = "ERROR: \"#{basename} #{name}\" was called with ".dup
  msg << "no arguments"               if     args.empty?
  msg << "arguments " << args.inspect unless args.empty?
  msg << "\nUsage: \"#{banner(command).split("\n").join("\"\n       \"")}\""
  raise InvocationError, msg
end

#handle_no_command_error(command, has_namespace = $thor_runner) Also known as: #handle_no_task_error

This method is for internal use only.
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 505

def handle_no_command_error(command, has_namespace = $thor_runner) #:nodoc:
  raise UndefinedCommandError.new(command, all_commands.keys, (namespace if has_namespace))
end

#handle_no_task_error(command, has_namespace = $thor_runner)

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 508

alias_method :handle_no_task_error, :handle_no_command_error

#inherited(klass) (protected)

Everytime someone inherits from a ::Bundler::Thor class, register the klass and file into baseclass.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 614

def inherited(klass)
  super(klass)
  Bundler::Thor::Base.register_klass_file(klass)
  klass.instance_variable_set(:@no_commands, 0)
end

#initialize_added (protected)

This method is for internal use only.

SIGNATURE: Defines behavior when the initialize method is added to the class.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 681

def initialize_added #:nodoc:
end

#is_thor_reserved_word?(word, type) ⇒ Boolean (protected)

This method is for internal use only.

Raises an error if the word given is a ::Bundler::Thor reserved word.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 570

def is_thor_reserved_word?(word, type) #:nodoc:
  return false unless THOR_RESERVED_WORDS.include?(word.to_s)
  raise "#{word.inspect} is a Bundler::Thor reserved word and cannot be defined as #{type}"
end

#method_added(meth) (protected)

Fire this callback whenever a method is added. Added methods are tracked as commands by invoking the create_command method.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 622

def method_added(meth)
  super(meth)
  meth = meth.to_s

  if meth == "initialize"
    initialize_added
    return
  end

  # Return if it's not a public instance method
  return unless public_method_defined?(meth.to_sym)

  return if no_commands? || !create_command(meth)

  is_thor_reserved_word?(meth, :command)
  Bundler::Thor::Base.register_klass_file(self)
end

#namespace(name = nil)

Sets the namespace for the ::Bundler::Thor or ::Bundler::Thor::Group class. By default the namespace is retrieved from the class name. If your ::Bundler::Thor class is named Scripts::MyScript, the help method, for example, will be called as:

thor scripts:my_script -h

If you change the namespace:

namespace :my_scripts

You change how your commands are invoked:

thor my_scripts -h

Finally, if you change your namespace to default:

namespace :default

Your commands can be invoked with a shortcut. Instead of:

thor :my_command
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 458

def namespace(name = nil)
  if name
    @namespace = name.to_s
  else
    @namespace ||= Bundler::Thor::Util.namespace_from_thor_class(self)
  end
end

#no_commands(&block) (readonly) Also known as: #no_tasks

All methods defined inside the given block are not added as commands.

So you can do:

class MyScript < Bundler::Thor
  no_commands do
    def this_is_not_a_command
    end
  end
end

You can also add the method and remove it from the command list:

class MyScript < Bundler::Thor
  def this_is_not_a_command
  end
  remove_command :this_is_not_a_command
end
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 422

def no_commands(&block)
  no_commands_context.enter(&block)
end

#no_commands_context

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 428

def no_commands_context
  @no_commands_context ||= NestedContext.new
end

#no_tasks(&block)

Alias for #no_commands.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 426

alias_method :no_tasks, :no_commands

#public_command(*names) Also known as: #public_task

Allows to use private methods from parent in child classes as commands.

Parameters

names<Array>:: Method names to be used as commands

Examples

public_command :foo
public_command :foo, :bar, :baz
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 498

def public_command(*names)
  names.each do |name|
    class_eval "def #{name}(*); super end"
  end
end

#public_task(*names)

Alias for #public_command.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 503

alias_method :public_task, :public_command

#remove_argument(*names)

Removes a previous defined argument. If :undefine is given, undefine accessors as well.

Parameters

names<Array>

::Bundler::Thor::Arguments to be removed

Examples

remove_argument :foo
remove_argument :foo, :bar, :baz, :undefine => true
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 318

def remove_argument(*names)
  options = names.last.is_a?(Hash) ? names.pop : {}

  names.each do |name|
    arguments.delete_if { |a| a.name == name.to_s }
    undef_method name, "#{name}=" if options[:undefine]
  end
end

#remove_class_option(*names)

Removes a previous defined class option.

Parameters

names<Array>

Class options to be removed

Examples

remove_class_option :foo
remove_class_option :foo, :bar, :baz
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 337

def remove_class_option(*names)
  names.each do |name|
    class_options.delete(name)
  end
end

#remove_command(*names) Also known as: #remove_task

Removes a given command from this ::Bundler::Thor class. This is usually done if you are inheriting from another class and don’t want it to be available anymore.

By default it only remove the mapping to the command. But you can supply :undefine => true to undefine the method from the class as well.

Parameters

name<Symbol|String>

The name of the command to be removed

options<Hash>

You can give :undefine => true if you want commands the method to be undefined from the class as well.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 392

def remove_command(*names)
  options = names.last.is_a?(Hash) ? names.pop : {}

  names.each do |name|
    commands.delete(name.to_s)
    all_commands.delete(name.to_s)
    undef_method name if options[:undefine]
  end
end

#remove_task(*names)

Alias for #remove_command.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 401

alias_method :remove_task, :remove_command

#start(given_args = ARGV, config = {})

Parses the command and options from the given args, instantiate the class and invoke the command. This method is used when the arguments must be parsed from an array. If you are inside Ruby and want to use a ::Bundler::Thor class, you can simply initialize it:

script = MyScript.new(args, options, config)
script.invoke(:command, first_arg, second_arg, third_arg)
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 474

def start(given_args = ARGV, config = {})
  config[:shell] ||= Bundler::Thor::Base.shell.new
  dispatch(nil, given_args.dup, nil, config)
rescue Bundler::Thor::Error => e
  config[:debug] || ENV["THOR_DEBUG"] == "1" ? (raise e) : config[:shell].error(e.message)
  exit(false) if exit_on_failure?
rescue Errno::EPIPE
  # This happens if a thor command is piped to something like `head`,
  # which closes the pipe when it's done reading. This will also
  # mean that if the pipe is closed, further unnecessary
  # computation will not occur.
  exit(true)
end

#stop_on_unknown_option?(command_name) ⇒ Boolean

This method is for internal use only.

If true, option parsing is suspended as soon as an unknown option or a regular argument is encountered. All remaining arguments are passed to the command as regular arguments.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 176

def stop_on_unknown_option?(command_name) #:nodoc:
  false
end

#strict_args_position

This method is for internal use only.
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 193

def strict_args_position #:nodoc:
  @strict_args_position ||= from_superclass(:strict_args_position, false)
end

#strict_args_position!

If you want only strict string args (useful when cascading thor classes), call strict_args_position! This is disabled by default to allow dynamic invocations.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 189

def strict_args_position!
  @strict_args_position = true
end

#strict_args_position?(config) ⇒ Boolean

This method is for internal use only.
[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 197

def strict_args_position?(config) #:nodoc:
  !!strict_args_position
end

#tasks

Alias for #commands.

[ GitHub ]

  
# File 'lib/bundler/vendor/thor/lib/thor/base.rb', line 366

alias_method :tasks, :commands