require_relative "command"
require_relative "core_ext/hash_with_indifferent_access"
require_relative "error"
require_relative "invocation"
require_relative "nested_context"
require_relative "parser"
require_relative "shell"
require_relative "line_editor"
require_relative "util"
class Thor
autoload :Actions, File.expand_path("actions", __dir__)
autoload :RakeCompat, File.expand_path("rake_compat", __dir__)
autoload :Group, File.expand_path("group", __dir__)
# Shortcuts for help.
HELP_MAPPINGS = %w(-h -? --help -D)
# Thor methods that should not be overwritten by the user.
THOR_RESERVED_WORDS = %w(invoke shell options behavior root destination_root relative_root
action add_file create_file in_root inside run run_ruby_script)
TEMPLATE_EXTNAME = ".tt"
module Base
attr_accessor :options, :parent_options, :args
# It receives arguments in an Array and two hashes, one for options and
# other for configuration.
#
# Notice that it does not check if all required arguments were supplied.
# It should be done by the parser.
#
# ==== Parameters
# args<Array[Object]>:: An array of objects. The objects are applied to their
# respective accessors declared with <tt>argument</tt>.
#
# options<Hash>:: An options hash that will be available as self.options.
# The hash given is converted to a hash with indifferent
# access, magic predicates (options.skip?) and then frozen.
#
# config<Hash>:: Configuration for this Thor class.
#
def initialize(args = [], local_options = {}, config = {})
parse_options = self.class.class_options
# The start method splits inbound arguments at the first argument
# that looks like an option (starts with - or --). It then calls
# new, passing in the two halves of the arguments Array as the
# first two parameters.
command_options = config.delete(:command_options) # hook for start
parse_options = parse_options.merge(command_options) if command_options
if local_options.is_a?(Array)
array_options = local_options
hash_options = {}
else
# Handle the case where the class was explicitly instantiated
# with pre-parsed options.
array_options = []
hash_options = local_options
end
# Let Thor::Options parse the options first, so it can remove
# declared options from the array. This will leave us with
# a list of arguments that weren't declared.
stop_on_unknown = self.class.stop_on_unknown_option? config[:current_command]
disable_required_check = self.class.disable_required_check? config[:current_command]
opts = Thor::Options.new(parse_options, hash_options, stop_on_unknown, disable_required_check)
self.options = opts.parse(array_options)
self.options = config[:class_options].merge(options) if config[:class_options]
# If unknown options are disallowed, make sure that none of the
# remaining arguments looks like an option.
opts.check_unknown! if self.class.check_unknown_options?(config)
# Add the remaining arguments from the options parser to the
# arguments passed in to initialize. Then remove any positional
# arguments declared using #argument (this is primarily used
# by Thor::Group). Tis will leave us with the remaining
# positional arguments.
to_parse = args
to_parse += opts.remaining unless self.class.strict_args_position?(config)
thor_args = Thor::Arguments.new(self.class.arguments)
thor_args.parse(to_parse).each { |k, v| __send__("#{k}=", v) }
@args = thor_args.remaining
end
class << self
def included(base) #:nodoc:
super(base)
base.extend ClassMethods
base.send :include, Invocation
base.send :include, Shell
end
# Returns the classes that inherits from Thor or Thor::Group.
#
# ==== Returns
# Array[Class]
#
def subclasses
@subclasses ||= []
end
# Returns the files where the subclasses are kept.
#
# ==== Returns
# Hash[path<String> => Class]
#
def subclass_files
@subclass_files ||= Hash.new { |h, k| h[k] = [] }
end
# Whenever a class inherits from Thor or Thor::Group, we should track the
# class and the file on Thor::Base. This is the method responsible for it.
#
def register_klass_file(klass) #:nodoc:
file = caller[1].match(/(.*):\d+/)[1]
Thor::Base.subclasses << klass unless Thor::Base.subclasses.include?(klass)
file_subclasses = Thor::Base.subclass_files[File.expand_path(file)]
file_subclasses << klass unless file_subclasses.include?(klass)
end
end
module ClassMethods
def attr_reader(*) #:nodoc:
no_commands { super }
end
def attr_writer(*) #:nodoc:
no_commands { super }
end
def attr_accessor(*) #:nodoc:
no_commands { super }
end
# If you want to raise an error for unknown options, call check_unknown_options!
# This is disabled by default to allow dynamic invocations.
def check_unknown_options!
@check_unknown_options = true
end
def check_unknown_options #:nodoc:
@check_unknown_options ||= from_superclass(:check_unknown_options, false)
end
def check_unknown_options?(config) #:nodoc:
!!check_unknown_options
end
# 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.
def check_default_type!
@check_default_type = true
end
# 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!`
def allow_incompatible_default_type!
@check_default_type = false
end
def check_default_type #:nodoc:
@check_default_type = from_superclass(:check_default_type, nil) unless defined?(@check_default_type)
@check_default_type
end
# 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.
def stop_on_unknown_option?(command_name) #:nodoc:
false
end
# If true, option set will not suspend the execution of the command when
# a required option is not provided.
def disable_required_check?(command_name) #:nodoc:
false
end
# 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.
def strict_args_position!
@strict_args_position = true
end
def strict_args_position #:nodoc:
@strict_args_position ||= from_superclass(:strict_args_position, false)
end
def strict_args_position?(config) #:nodoc:
!!strict_args_position
end
# 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.
#
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 << Thor::Argument.new(name, options)
end
# Returns this class arguments, looking up in the ancestors chain.
#
# ==== Returns
# Array[Thor::Argument]
#
def arguments
@arguments ||= from_superclass(:arguments, [])
end
# 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]
#
def class_options(options = nil)
@class_options ||= from_superclass(:class_options, {})
build_options(options, @class_options) if options
@class_options
end
# 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. <b>Note:</b> 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.
#
def class_option(name, options = {})
build_option(name, options, class_options)
end
# 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
#
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
# 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
#
def remove_class_option(*names)
names.each do |name|
class_options.delete(name)
end
end
# 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>
#
def group(name = nil)
if name
@group = name.to_s
else
@group ||= from_superclass(:group, "standard")
end
end
# Returns the commands for this Thor class.
#
# ==== Returns
# Hash:: An ordered hash with commands names as keys and Thor::Command
# objects as values.
#
def commands
@commands ||= Hash.new
end
alias_method :tasks, :commands
# Returns the commands for this Thor class and all subclasses.
#
# ==== Returns
# Hash:: An ordered hash with commands names as keys and Thor::Command
# objects as values.
#
def all_commands
@all_commands ||= from_superclass(:all_commands, Hash.new)
@all_commands.merge!(commands)
end
alias_method :all_tasks, :all_commands
# Removes a given command from this 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.
#
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
alias_method :remove_task, :remove_command
# All methods defined inside the given block are not added as commands.
#
# So you can do:
#
# class MyScript < 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 < Thor
# def this_is_not_a_command
# end
# remove_command :this_is_not_a_command
# end
#
def no_commands(&block)
no_commands_context.enter(&block)
end
alias_method :no_tasks, :no_commands
def no_commands_context
@no_commands_context ||= NestedContext.new
end
def no_commands?
no_commands_context.entered?
end
# Sets the namespace for the Thor or Thor::Group class. By default the
# namespace is retrieved from the class name. If your 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
#
def namespace(name = nil)
if name
@namespace = name.to_s
else
@namespace ||= Thor::Util.namespace_from_thor_class(self)
end
end
# 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 Thor class, you
# can simply initialize it:
#
# script = MyScript.new(args, options, config)
# script.invoke(:command, first_arg, second_arg, third_arg)
#
def start(given_args = ARGV, config = {})
config[:shell] ||= Thor::Base.shell.new
dispatch(nil, given_args.dup, nil, config)
rescue 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
# 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
#
def public_command(*names)
names.each do |name|
class_eval "def #{name}(*); super end"
end
end
alias_method :public_task, :public_command
def handle_no_command_error(command, has_namespace = $thor_runner) #:nodoc:
raise UndefinedCommandError.new(command, all_commands.keys, (namespace if has_namespace))
end
alias_method :handle_no_task_error, :handle_no_command_error
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
# A flag that makes the process exit with status 1 if any error happens.
def exit_on_failure?
Thor.deprecation_warning "Thor exit with status 0 on errors. To keep this behavior, you must define `exit_on_failure?` in `#{self.name}`"
false
end
protected
# Prints the class options per group. If an option does not belong to
# any group, it's printed as Class option.
#
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
# Receives a set of options and print them.
def print_options(shell, options, group_name = nil)
return if options.empty?
list = []
padding = options.map { |o| o.aliases.size }.max.to_i * 4
options.each do |option|
next if option.hide
item = [option.usage(padding)]
item.push(option.description ? "# #{option.description}" : "")
list << item
list << ["", "# Default: #{option.default}"] if option.show_default?
list << ["", "# Possible values: #{option.enum.join(', ')}"] if option.enum
end
shell.say(group_name ? "#{group_name} options:" : "Options:")
shell.print_table(list, :indent => 2)
shell.say ""
end
# Raises an error if the word given is a Thor reserved word.
def is_thor_reserved_word?(word, type) #:nodoc:
return false unless THOR_RESERVED_WORDS.include?(word.to_s)
raise "#{word.inspect} is a Thor reserved word and cannot be defined as #{type}"
end
# 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>:: Options hash that is being built up
def build_option(name, options, scope) #:nodoc:
scope[name] = Thor::Option.new(name, {:check_default_type => check_default_type}.merge!(options))
end
# 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]
def build_options(options, scope) #:nodoc:
options.each do |key, value|
scope[key] = Thor::Option.parse(key, value)
end
end
# 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.
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
alias_method :find_and_refresh_task, :find_and_refresh_command
# Everytime someone inherits from a Thor class, register the klass
# and file into baseclass.
def inherited(klass)
super(klass)
Thor::Base.register_klass_file(klass)
klass.instance_variable_set(:@no_commands, 0)
end
# Fire this callback whenever a method is added. Added methods are
# tracked as commands by invoking the create_command method.
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)
Thor::Base.register_klass_file(self)
end
# Retrieves a value from superclass. If it reaches the baseclass,
# returns default.
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
#
# The basename of the program invoking the thor class.
#
def basename
File.basename($PROGRAM_NAME).split(" ").first
end
# SIGNATURE: Sets the baseclass. This is where the superclass lookup
# finishes.
def baseclass #:nodoc:
end
# SIGNATURE: Creates a new command if valid_command? is true. This method is
# called when a new method is added to the class.
def create_command(meth) #:nodoc:
end
alias_method :create_task, :create_command
# SIGNATURE: Defines behavior when the initialize method is added to the
# class.
def initialize_added #:nodoc:
end
# SIGNATURE: The hook invoked by start.
def dispatch(command, given_args, given_opts, config) #:nodoc:
raise NotImplementedError
end
end
end
end