Class: Thor

Inherits:
Object
  • Object
show all
Includes:
Base
Defined in:
lib/thor.rb,
lib/thor/util.rb,
lib/thor/base.rb,
lib/thor/task.rb,
lib/thor/error.rb,
lib/thor/shell.rb,
lib/thor/actions.rb,
lib/thor/version.rb,
lib/thor/shell/html.rb,
lib/thor/invocation.rb,
lib/thor/shell/color.rb,
lib/thor/shell/basic.rb,
lib/thor/rake_compat.rb,
lib/thor/parser/option.rb,
lib/thor/parser/options.rb,
lib/thor/parser/argument.rb,
lib/thor/parser/arguments.rb,
lib/thor/actions/directory.rb,
lib/thor/actions/create_link.rb,
lib/thor/actions/create_file.rb,
lib/thor/core_ext/ordered_hash.rb,
lib/thor/actions/empty_directory.rb,
lib/thor/actions/inject_into_file.rb,
lib/thor/actions/file_manipulation.rb,
lib/thor/core_ext/hash_with_indifferent_access.rb

Direct Known Subclasses

Runner

Defined Under Namespace

Modules: Actions, Base, CoreExt, Invocation, RakeCompat, Sandbox, Shell, Util Classes: Argument, Arguments, DynamicTask, Error, Group, HiddenTask, InvocationError, MalformattedArgumentError, Option, Options, PrivateMethodEncodedError, RequiredArgumentMissingError, Runner, Task, UndefinedTaskError, UnknownArgumentError

Constant Summary

HELP_MAPPINGS =

Shortcuts for help.

%w(-h -? --help -D)
THOR_RESERVED_WORDS =

Thor methods that should not be overwritten by the user.

%w(invoke shell options behavior root destination_root relative_root
action add_file create_file in_root inside run run_ruby_script)
VERSION =
"0.16.0"

Instance Attribute Summary

Attributes included from Base

#args, #options, #parent_options

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Base

included, #initialize, register_klass_file, shell, shell=, subclass_files, subclasses

Class Method Details

.check_unknown_options!(options = {}) ⇒ Object

Extend check unknown options to accept a hash of conditions.

Parameters

options<Hash>: A hash containing :only and/or :except keys



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# File 'lib/thor.rb', line 222

def check_unknown_options!(options={})
  @check_unknown_options ||= Hash.new
  options.each do |key, value|
    if value
      @check_unknown_options[key] = Array(value)
    else
      @check_unknown_options.delete(key)
    end
  end
  @check_unknown_options
end

.check_unknown_options?(config) ⇒ Boolean

Overwrite check_unknown_options? to take subcommands and options into account.

Returns:

  • (Boolean)


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# File 'lib/thor.rb', line 235

def check_unknown_options?(config) #:nodoc:
  options = check_unknown_options
  return false unless options

  task = config[:current_task]
  return true unless task

  name = task.name

  if subcommands.include?(name)
    false
  elsif options[:except]
    !options[:except].include?(name.to_sym)
  elsif options[:only]
    options[:only].include?(name.to_sym)
  else
    true
  end
end

.default_task(meth = nil) ⇒ Object

Sets the default task when thor is executed without an explicit task to be called.

Parameters

meth<Symbol>

name of the default task



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

def default_task(meth=nil)
  case meth
    when :none
      @default_task = 'help'
    when nil
      @default_task ||= from_superclass(:default_task, 'help')
    else
      @default_task = meth.to_s
  end
end

.desc(usage, description, options = {}) ⇒ Object

Defines the usage and the description of the next task.

Parameters

usage<String> description<String> options<String>



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# File 'lib/thor.rb', line 46

def desc(usage, description, options={})
  if options[:for]
    task = find_and_refresh_task(options[:for])
    task.usage = usage             if usage
    task.description = description if description
  else
    @usage, @desc, @hide = usage, description, options[:hide] || false
  end
end

.help(shell, subcommand = false) ⇒ Object

Prints help information for this class.

Parameters

shell<Thor::Shell>



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# File 'lib/thor.rb', line 180

def help(shell, subcommand = false)
  list = printable_tasks(true, subcommand)
  Thor::Util.thor_classes_in(self).each do |klass|
    list += klass.printable_tasks(false)
  end
  list.sort!{ |a,b| a[0] <=> b[0] }

  shell.say "Tasks:"
  shell.print_table(list, :indent => 2, :truncate => true)
  shell.say
  class_options_help(shell)
end

.long_desc(long_description, options = {}) ⇒ Object

Defines the long description of the next task.

Parameters

long description<String>



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

def long_desc(long_description, options={})
  if options[:for]
    task = find_and_refresh_task(options[:for])
    task.long_description = long_description if long_description
  else
    @long_desc = long_description
  end
end

.map(mappings = nil) ⇒ Object

Maps an input to a task. If you define:

map "-T" => "list"

Running:

thor -T

Will invoke the list task.

Parameters

Hash[String|Array => Symbol]

Maps the string or the strings in the array to the given task.



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# File 'lib/thor.rb', line 83

def map(mappings=nil)
  @map ||= from_superclass(:map, {})

  if mappings
    mappings.each do |key, value|
      if key.respond_to?(:each)
        key.each {|subkey| @map[subkey] = value}
      else
        @map[key] = value
      end
    end
  end

  @map
end

.method_option(name, options = {}) ⇒ Object Also known as: option

Adds an option to the set of method options. If :for is given as option, it allows you to change the options from a previous defined task.

def previous_task
  # magic
end

method_option :foo => :bar, :for => :previous_task

def next_task
  # magic
end

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. It cannot be required and have default values. :aliases - Aliases for this option. :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.



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# File 'lib/thor.rb', line 140

def method_option(name, options={})
  scope = if options[:for]
    find_and_refresh_task(options[:for]).options
  else
    method_options
  end

  build_option(name, options, scope)
end

.method_options(options = nil) ⇒ Object Also known as: options

Declares the options for the next task to be declared.

Parameters

Hash[Symbol => Object]

The hash key is the name of the option and the value

is the type of the option. Can be :string, :array, :hash, :boolean, :numeric or :required (string). If you give a value, the type of the value is used.



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# File 'lib/thor.rb', line 106

def method_options(options=nil)
  @method_options ||= {}
  build_options(options, @method_options) if options
  @method_options
end

.printable_tasks(all = true, subcommand = false) ⇒ Object

Returns tasks ready to be printed.



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# File 'lib/thor.rb', line 194

def printable_tasks(all = true, subcommand = false)
  (all ? all_tasks : tasks).map do |_, task|
    next if task.hidden?
    item = []
    item << banner(task, false, subcommand)
    item << (task.description ? "# #{task.description.gsub(/\s+/m,' ')}" : "")
    item
  end.compact
end

.register(klass, subcommand_name, usage, description, options = {}) ⇒ Object

Registers another Thor subclass as a command.

Parameters

klass<Class>

Thor subclass to register

command<String>

Subcommand name to use

usage<String>

Short usage for the subcommand

description<String>

Description for the subcommand



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# File 'lib/thor.rb', line 29

def register(klass, subcommand_name, usage, description, options={})
  if klass <= Thor::Group
    desc usage, description, options
    define_method(subcommand_name) { |*args| invoke(klass, args) }
  else
    desc usage, description, options
    subcommand subcommand_name, klass
  end
end

.stop_on_unknown_option!(*task_names) ⇒ Object

Stop parsing of options as soon as an unknown option or a regular argument is encountered. All remaining arguments are passed to the task. This is useful if you have a task that can receive arbitrary additional options, and where those additional options should not be handled by Thor.

Example

To better understand how this is useful, let's consider a task that calls an external command. A user may want to pass arbitrary options and arguments to that command. The task itself also accepts some options, which should be handled by Thor.

class_option "verbose",  :type => :boolean
stop_on_unknown_option! :exec
check_unknown_options!  :except => :exec

desc "exec", "Run a shell command"
def exec(*args)
  puts "diagnostic output" if options[:verbose]
  Kernel.exec(*args)
end

Here exec can be called with --verbose to get diagnostic output, e.g.:

$ thor exec --verbose echo foo
diagnostic output
foo

But if --verbose is given after echo, it is passed to echo instead:

$ thor exec echo --verbose foo
--verbose foo

Parameters

Symbol ...

A list of tasks that should be affected.



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# File 'lib/thor.rb', line 292

def stop_on_unknown_option!(*task_names)
  @stop_on_unknown_option ||= Set.new
  @stop_on_unknown_option.merge(task_names)
end

.stop_on_unknown_option?(task) ⇒ Boolean

:nodoc:

Returns:

  • (Boolean)


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# File 'lib/thor.rb', line 297

def stop_on_unknown_option?(task) #:nodoc:
  !!@stop_on_unknown_option && @stop_on_unknown_option.include?(task.name.to_sym)
end

.subcommand(subcommand, subcommand_class) ⇒ Object



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# File 'lib/thor.rb', line 208

def subcommand(subcommand, subcommand_class)
  self.subcommands << subcommand.to_s
  subcommand_class.subcommand_help subcommand

  define_method(subcommand) do |*args|
    args, opts = Thor::Arguments.split(args)
    invoke subcommand_class, args, opts, :invoked_via_subcommand => true
  end
end

.subcommandsObject



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# File 'lib/thor.rb', line 204

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

.task_help(shell, task_name) ⇒ Object

Prints help information for the given task.

Parameters

shell<Thor::Shell> task_name<String>



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# File 'lib/thor.rb', line 158

def task_help(shell, task_name)
  meth = normalize_task_name(task_name)
  task = all_tasks[meth]
  handle_no_task_error(meth) unless task

  shell.say "Usage:"
  shell.say "  #{banner(task)}"
  shell.say
  class_options_help(shell, nil => task.options.map { |_, o| o })
  if task.long_description
    shell.say "Description:"
    shell.print_wrapped(task.long_description, :indent => 2)
  else
    shell.say task.description
  end
end

Instance Method Details

#help(task = nil, subcommand = false) ⇒ Object



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# File 'lib/thor.rb', line 445

def help(task = nil, subcommand = false)
  task ? self.class.task_help(shell, task) : self.class.help(shell, subcommand)
end