module Bundler::Thor::Base::ClassMethods

Public Instance Methods

all_commands() click to toggle source

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.

# File bundler/vendor/thor/lib/thor/base.rb, line 482
def all_commands
  @all_commands ||= from_superclass(:all_commands, Hash.new)
  @all_commands.merge!(commands)
end
Also aliased as: all_tasks
all_tasks()
Alias for: all_commands
allow_incompatible_default_type!() click to toggle source

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!`

# File bundler/vendor/thor/lib/thor/base.rb, line 189
def allow_incompatible_default_type!
  @check_default_type = false
end
argument(name, options = {}) click to toggle source

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

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.

# File bundler/vendor/thor/lib/thor/base.rb, line 261
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() click to toggle source

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

Returns

Array

# File bundler/vendor/thor/lib/thor/base.rb, line 293
def arguments
  @arguments ||= from_superclass(:arguments, [])
end
check_default_type!() click to toggle source

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.

# File bundler/vendor/thor/lib/thor/base.rb, line 183
def check_default_type!
  @check_default_type = true
end
check_unknown_options!() click to toggle source

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

# File bundler/vendor/thor/lib/thor/base.rb, line 168
def check_unknown_options!
  @check_unknown_options = true
end
class_at_least_one(*args, &block) click to toggle source

Adds and declares option group for required at least one of options in the block and arguments. You can declare options as the outside of the block.

Examples

class_at_least_one do
  class_option :one
  class_option :two
 end

Or

class_option :one
class_option :two
class_at_least_one :one, :two

If you do not give “–one” and “–two” AtLeastOneRequiredArgumentError will be raised.

You can use class_at_least_one and class_exclusive at the same time.

class_exclusive do
  class_at_least_one do
    class_option :one
    class_option :two
  end
end

Then it is required either only one of “–one” or “–two”.

# File bundler/vendor/thor/lib/thor/base.rb, line 392
def class_at_least_one(*args, &block)
  register_options_relation_for(:class_options,
                                :class_at_least_one_option_names, *args, &block)
end
class_at_least_one_option_names() click to toggle source

Returns this class at least one of required options array set, looking up in the ancestors chain.

Returns

Array[Array]

# File bundler/vendor/thor/lib/thor/base.rb, line 411
def class_at_least_one_option_names
  @class_at_least_one_option_names ||= from_superclass(:class_at_least_one_option_names, [])
end
class_exclusive(*args, &block) click to toggle source

Adds and declares option group for exclusive options in the block and arguments. You can declare options as the outside of the block.

Parameters

Array

Examples

class_exclusive do
  class_option :one
  class_option :two
 end

Or

class_option :one
class_option :two
class_exclusive :one, :two

If you give “–one” and “–two” at the same time ExclusiveArgumentsError will be raised.

# File bundler/vendor/thor/lib/thor/base.rb, line 357
def class_exclusive(*args, &block)
  register_options_relation_for(:class_options,
                                :class_exclusive_option_names, *args, &block)
end
class_exclusive_option_names() click to toggle source

Returns this class exclusive options array set, looking up in the ancestors chain.

Returns

Array[Array]

# File bundler/vendor/thor/lib/thor/base.rb, line 402
def class_exclusive_option_names
  @class_exclusive_option_names ||= from_superclass(:class_exclusive_option_names, [])
end
class_option(name, options = {}) click to toggle source

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.

# File bundler/vendor/thor/lib/thor/base.rb, line 328
def class_option(name, options = {})
  unless [ Symbol, String ].any? { |klass| name.is_a?(klass) }
    raise ArgumentError, "Expected a Symbol or String, got #{name.inspect}"
  end
  build_option(name, options, class_options)
end
class_options(options = nil) click to toggle source

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]

# File bundler/vendor/thor/lib/thor/base.rb, line 306
def class_options(options = nil)
  @class_options ||= from_superclass(:class_options, {})
  build_options(options, @class_options) if options
  @class_options
end
commands() click to toggle source

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.

# File bundler/vendor/thor/lib/thor/base.rb, line 471
def commands
  @commands ||= Hash.new
end
Also aliased as: tasks
exit_on_failure?() click to toggle source

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

# File bundler/vendor/thor/lib/thor/base.rb, line 628
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
group(name = nil) click to toggle source

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>

# File bundler/vendor/thor/lib/thor/base.rb, line 457
def group(name = nil)
  if name
    @group = name.to_s
  else
    @group ||= from_superclass(:group, "standard")
  end
end
namespace(name = nil) click to toggle source

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
# File bundler/vendor/thor/lib/thor/base.rb, line 566
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) click to toggle source

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
# File bundler/vendor/thor/lib/thor/base.rb, line 530
def no_commands(&block)
  no_commands_context.enter(&block)
end
Also aliased as: no_tasks
no_commands?() click to toggle source
# File bundler/vendor/thor/lib/thor/base.rb, line 540
def no_commands?
  no_commands_context.entered?
end
no_commands_context() click to toggle source
# File bundler/vendor/thor/lib/thor/base.rb, line 536
def no_commands_context
  @no_commands_context ||= NestedContext.new
end
no_tasks(&block)
Alias for: no_commands
public_command(*names) click to toggle source

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
# File bundler/vendor/thor/lib/thor/base.rb, line 606
def public_command(*names)
  names.each do |name|
    class_eval "def #{name}(*); super end", __FILE__, __LINE__
  end
end
Also aliased as: public_task
public_task(*names)
Alias for: public_command
remove_argument(*names) click to toggle source

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

Parameters

names<Array>

Arguments to be removed

Examples

remove_argument :foo
remove_argument :foo, :bar, :baz, :undefine => true
# File bundler/vendor/thor/lib/thor/base.rb, line 426
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) click to toggle source

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
# File bundler/vendor/thor/lib/thor/base.rb, line 445
def remove_class_option(*names)
  names.each do |name|
    class_options.delete(name)
  end
end
remove_command(*names) click to toggle source

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.

# File bundler/vendor/thor/lib/thor/base.rb, line 500
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
Also aliased as: remove_task
remove_task(*names)
Alias for: remove_command
start(given_args = ARGV, config = {}) click to toggle source

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)
# File bundler/vendor/thor/lib/thor/base.rb, line 582
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
strict_args_position!() click to toggle source

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.

# File bundler/vendor/thor/lib/thor/base.rb, line 214
def strict_args_position!
  @strict_args_position = true
end
tasks()
Alias for: commands

Protected Instance Methods

basename() click to toggle source

The basename of the program invoking the thor class.

# File bundler/vendor/thor/lib/thor/base.rb, line 771
def basename
  File.basename($PROGRAM_NAME).split(" ").first
end
from_superclass(method, default = nil) click to toggle source

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

# File bundler/vendor/thor/lib/thor/base.rb, line 749
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
inherited(klass) click to toggle source

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

Calls superclass method
# File bundler/vendor/thor/lib/thor/base.rb, line 721
def inherited(klass)
  super(klass)
  Bundler::Thor::Base.register_klass_file(klass)
  klass.instance_variable_set(:@no_commands, 0)
end
method_added(meth) click to toggle source

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

Calls superclass method
# File bundler/vendor/thor/lib/thor/base.rb, line 729
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
print_options(shell, options, group_name = nil) click to toggle source

Receives a set of options and print them.