1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
|
require 'set'
require 'thor/base'
class Thor # rubocop:disable ClassLength
class << self
# Allows for custom "Command" package naming.
#
# === Parameters
# name<String>
# options<Hash>
#
def package_name(name, options = {})
@package_name = name.nil? || name == '' ? nil : name
end
# Sets the default command when thor is executed without an explicit command to be called.
#
# ==== Parameters
# meth<Symbol>:: name of the default command
#
def default_command(meth = nil)
if meth
@default_command = meth == :none ? 'help' : meth.to_s
else
@default_command ||= from_superclass(:default_command, 'help')
end
end
alias_method :default_task, :default_command
# 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
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
# Defines the usage and the description of the next command.
#
# ==== Parameters
# usage<String>
# description<String>
# options<String>
#
def desc(usage, description, options = {})
if options[:for]
command = find_and_refresh_command(options[:for])
command.usage = usage if usage
command.description = description if description
else
@usage, @desc, @hide = usage, description, options[:hide] || false
end
end
# Defines the long description of the next command.
#
# ==== Parameters
# long description<String>
#
def long_desc(long_description, options = {})
if options[:for]
command = find_and_refresh_command(options[:for])
command.long_description = long_description if long_description
else
@long_desc = long_description
end
end
# Maps an input to a command. If you define:
#
# map "-T" => "list"
#
# Running:
#
# thor -T
#
# Will invoke the list command.
#
# ==== Parameters
# Hash[String|Array => Symbol]:: Maps the string or the strings in the array to the given command.
#
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
# Declares the options for the next command 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.
#
def method_options(options = nil)
@method_options ||= {}
build_options(options, @method_options) if options
@method_options
end
alias_method :options, :method_options
# 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 command.
#
# def previous_command
# # magic
# end
#
# method_option :foo => :bar, :for => :previous_command
#
# def next_command
# # 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.
#
def method_option(name, options = {})
scope = if options[:for]
find_and_refresh_command(options[:for]).options
else
method_options
end
build_option(name, options, scope)
end
alias_method :option, :method_option
# Prints help information for the given command.
#
# ==== Parameters
# shell<Thor::Shell>
# command_name<String>
#
def command_help(shell, command_name)
meth = normalize_command_name(command_name)
command = all_commands[meth]
handle_no_command_error(meth) unless command
shell.say 'Usage:'
shell.say " #{banner(command)}"
shell.say
class_options_help(shell, nil => command.options.map { |_, o| o })
if command.long_description
shell.say 'Description:'
shell.print_wrapped(command.long_description, :indent => 2)
else
shell.say command.description
end
end
alias_method :task_help, :command_help
# Prints help information for this class.
#
# ==== Parameters
# shell<Thor::Shell>
#
def help(shell, subcommand = false)
list = printable_commands(true, subcommand)
Thor::Util.thor_classes_in(self).each do |klass|
list += klass.printable_commands(false)
end
list.sort! { |a, b| a[0] <=> b[0] }
if defined?(@package_name) && @package_name
shell.say "#{@package_name} commands:"
else
shell.say 'Commands:'
end
shell.print_table(list, :indent => 2, :truncate => true)
shell.say
class_options_help(shell)
end
# Returns commands ready to be printed.
def printable_commands(all = true, subcommand = false)
(all ? all_commands : commands).map do |_, command|
next if command.hidden?
item = []
item << banner(command, false, subcommand)
item << (command.description ? "# #{command.description.gsub(/\s+/m, ' ')}" : '')
item
end.compact
end
alias_method :printable_tasks, :printable_commands
def subcommands
@subcommands ||= from_superclass(:subcommands, [])
end
alias_method :subtasks, :subcommands
def subcommand(subcommand, subcommand_class)
subcommands << subcommand.to_s
subcommand_class.subcommand_help subcommand
define_method(subcommand) do |*args|
args, opts = Thor::Arguments.split(args)
args.unshift("help") if opts.include? "--help" or opts.include? "-h"
invoke subcommand_class, args, opts, :invoked_via_subcommand => true, :class_options => options
end
end
alias_method :subtask, :subcommand
# Extend check unknown options to accept a hash of conditions.
#
# === Parameters
# options<Hash>: A hash containing :only and/or :except keys
def check_unknown_options!(options = {})
@check_unknown_options ||= {}
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
# Overwrite check_unknown_options? to take subcommands and options into account.
def check_unknown_options?(config) #:nodoc:
options = check_unknown_options
return false unless options
command = config[:current_command]
return true unless command
name = command.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
# Stop parsing of options as soon as an unknown option or a regular
# argument is encountered. All remaining arguments are passed to the command.
# This is useful if you have a command 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 command that calls
# an external command. A user may want to pass arbitrary options and
# arguments to that command. The command 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 commands that should be affected.
def stop_on_unknown_option!(*command_names)
stop_on_unknown_option.merge(command_names)
end
def stop_on_unknown_option?(command) #:nodoc:
command && stop_on_unknown_option.include?(command.name.to_sym)
end
protected
def stop_on_unknown_option #:nodoc:
@stop_on_unknown_option ||= Set.new
end
# The method responsible for dispatching given the args.
def dispatch(meth, given_args, given_opts, config) #:nodoc: # rubocop:disable MethodLength
# There is an edge case when dispatching from a subcommand.
# A problem occurs invoking the default command. This case occurs
# when arguments are passed and a default command is defined, and
# the first given_args does not match the default command.
# Thor use "help" by default so we skip that case.
# Note the call to retrieve_command_name. It's called with
# given_args.dup since that method calls args.shift. Then lookup
# the command normally. If the first item in given_args is not
# a command then use the default command. The given_args will be
# intact later since dup was used.
if config[:invoked_via_subcommand] && given_args.size >= 1 && default_command != 'help' && given_args.first != default_command
meth ||= retrieve_command_name(given_args.dup)
command = all_commands[normalize_command_name(meth)]
command ||= all_commands[normalize_command_name(default_command)]
else
meth ||= retrieve_command_name(given_args)
command = all_commands[normalize_command_name(meth)]
end
if command
args, opts = Thor::Options.split(given_args)
if stop_on_unknown_option?(command) && !args.empty?
# given_args starts with a non-option, so we treat everything as
# ordinary arguments
args.concat opts
opts.clear
end
else
args, opts = given_args, nil
command = dynamic_command_class.new(meth)
end
opts = given_opts || opts || []
config.merge!(:current_command => command, :command_options => command.options)
instance = new(args, opts, config)
yield instance if block_given?
args = instance.args
trailing = args[Range.new(arguments.size, -1)]
instance.invoke_command(command, trailing || [])
end
# The banner for this class. You can customize it if you are invoking the
# thor class by another ways which is not the Thor::Runner. It receives
# the command that is going to be invoked and a boolean which indicates if
# the namespace should be displayed as arguments.
#
def banner(command, namespace = nil, subcommand = false)
"#{basename} #{command.formatted_usage(self, $thor_runner, subcommand)}"
end
def baseclass #:nodoc:
Thor
end
def dynamic_command_class #:nodoc:
Thor::DynamicCommand
end
def create_command(meth) #:nodoc:
@usage ||= nil
@desc ||= nil
@long_desc ||= nil
if @usage && @desc
base_class = @hide ? Thor::HiddenCommand : Thor::Command
commands[meth] = base_class.new(meth, @desc, @long_desc, @usage, method_options)
@usage, @desc, @long_desc, @method_options, @hide = nil
true
elsif all_commands[meth] || meth == 'method_missing'
true
else
puts "[WARNING] Attempted to create command #{meth.inspect} without usage or description. " <<
'Call desc if you want this method to be available as command or declare it inside a ' <<
"no_commands{} block. Invoked from #{caller[1].inspect}."
false
end
end
alias_method :create_task, :create_command
def initialize_added #:nodoc:
class_options.merge!(method_options)
@method_options = nil
end
# Retrieve the command name from given args.
def retrieve_command_name(args) #:nodoc:
meth = args.first.to_s unless args.empty?
if meth && (map[meth] || meth !~ /^\-/)
args.shift
else
nil
end
end
alias_method :retrieve_task_name, :retrieve_command_name
# receives a (possibly nil) command name and returns a name that is in
# the commands hash. In addition to normalizing aliases, this logic
# will determine if a shortened command is an unambiguous substring of
# a command or alias.
#
# +normalize_command_name+ also converts names like +animal-prison+
# into +animal_prison+.
def normalize_command_name(meth) #:nodoc:
return default_command.to_s.gsub('-', '_') unless meth
possibilities = find_command_possibilities(meth)
if possibilities.size > 1
fail AmbiguousTaskError, "Ambiguous command #{meth} matches [#{possibilities.join(', ')}]"
elsif possibilities.size < 1
meth = meth || default_command
elsif map[meth]
meth = map[meth]
else
meth = possibilities.first
end
meth.to_s.gsub('-', '_') # treat foo-bar as foo_bar
end
alias_method :normalize_task_name, :normalize_command_name
# this is the logic that takes the command name passed in by the user
# and determines whether it is an unambiguous substrings of a command or
# alias name.
def find_command_possibilities(meth)
len = meth.to_s.length
possibilities = all_commands.merge(map).keys.select { |n| meth == n[0, len] }.sort
unique_possibilities = possibilities.map { |k| map[k] || k }.uniq
if possibilities.include?(meth)
[meth]
elsif unique_possibilities.size == 1
unique_possibilities
else
possibilities
end
end
alias_method :find_task_possibilities, :find_command_possibilities
def subcommand_help(cmd)
desc 'help [COMMAND]', 'Describe subcommands or one specific subcommand'
class_eval "
def help(command = nil, subcommand = true); super; end
"
end
alias_method :subtask_help, :subcommand_help
end
include Thor::Base
map HELP_MAPPINGS => :help
desc 'help [COMMAND]', 'Describe available commands or one specific command'
def help(command = nil, subcommand = false)
command ? self.class.command_help(shell, command) : self.class.help(shell, subcommand)
end
end
|