Skip to content
This repository
Fetching contributors…

Cannot retrieve contributors at this time

file 621 lines (572 sloc) 15.234 kb
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621
#
# GetoptLong for Ruby
#
# Copyright (C) 1998, 1999, 2000 Motoyuki Kasahara.
#
# You may redistribute and/or modify this library under the same license
# terms as Ruby.
#
# See GetoptLong for documentation.
#
# Additional documents and the latest version of `getoptlong.rb' can be
# found at http://www.sra.co.jp/people/m-kasahr/ruby/getoptlong/

# The GetoptLong class allows you to parse command line options similarly to
# the GNU getopt_long() C library call. Note, however, that GetoptLong is a
# pure Ruby implementation.
#
# GetoptLong allows for POSIX-style options like <tt>--file</tt> as well
# as single letter options like <tt>-f</tt>
#
# The empty option <tt>--</tt> (two minus symbols) is used to end option
# processing. This can be particularly important if options have optional
# arguments.
#
# Here is a simple example of usage:
#
# # == Synopsis
# #
# # hello: greets user, demonstrates command line parsing
# #
# # == Usage
# #
# # hello [OPTION] ... DIR
# #
# # -h, --help:
# # show help
# #
# # --repeat x, -n x:
# # repeat x times
# #
# # --name [name]:
# # greet user by name, if name not supplied default is John
# #
# # DIR: The directory in which to issue the greeting.
#
# require 'getoptlong'
# require 'rdoc/usage'
#
# opts = GetoptLong.new(
# [ '--help', '-h', GetoptLong::NO_ARGUMENT ],
# [ '--repeat', '-n', GetoptLong::REQUIRED_ARGUMENT ],
# [ '--name', GetoptLong::OPTIONAL_ARGUMENT ]
# )
#
# dir = nil
# name = nil
# repetitions = 1
# opts.each do |opt, arg|
# case opt
# when '--help'
# RDoc::usage
# when '--repeat'
# repetitions = arg.to_i
# when '--name'
# if arg == ''
# name = 'John'
# else
# name = arg
# end
# end
# end
#
# if ARGV.length != 1
# puts "Missing dir argument (try --help)"
# exit 0
# end
#
# dir = ARGV.shift
#
# Dir.chdir(dir)
# for i in (1..repetitions)
# print "Hello"
# if name
# print ", #{name}"
# end
# puts
# end
#
# Example command line:
#
# hello -n 6 --name -- /tmp
#
class GetoptLong
  #
  # Orderings.
  #
  ORDERINGS = [REQUIRE_ORDER = 0, PERMUTE = 1, RETURN_IN_ORDER = 2]

  #
  # Argument flags.
  #
  ARGUMENT_FLAGS = [NO_ARGUMENT = 0, REQUIRED_ARGUMENT = 1,
    OPTIONAL_ARGUMENT = 2]

  #
  # Status codes.
  #
  STATUS_YET, STATUS_STARTED, STATUS_TERMINATED = 0, 1, 2

  #
  # Error types.
  #
  class Error < StandardError; end
  class AmbigousOption < Error; end
  class NeedlessArgument < Error; end
  class MissingArgument < Error; end
  class InvalidOption < Error; end

  #
  # Set up option processing.
  #
  # The options to support are passed to new() as an array of arrays.
  # Each sub-array contains any number of String option names which carry
  # the same meaning, and one of the following flags:
  #
  # GetoptLong::NO_ARGUMENT :: Option does not take an argument.
  #
  # GetoptLong::REQUIRED_ARGUMENT :: Option always takes an argument.
  #
  # GetoptLong::OPTIONAL_ARGUMENT :: Option may or may not take an argument.
  #
  # The first option name is considered to be the preferred (canonical) name.
  # Other than that, the elements of each sub-array can be in any order.
  #
  def initialize(*arguments)
    #
    # Current ordering.
    #
    if ENV.include?('POSIXLY_CORRECT')
      @ordering = REQUIRE_ORDER
    else
      @ordering = PERMUTE
    end

    #
    # Hash table of option names.
    # Keys of the table are option names, and their values are canonical
    # names of the options.
    #
    @canonical_names = Hash.new

    #
    # Hash table of argument flags.
    # Keys of the table are option names, and their values are argument
    # flags of the options.
    #
    @argument_flags = Hash.new

    #
    # Whether error messages are output to $deferr.
    #
    @quiet = FALSE

    #
    # Status code.
    #
    @status = STATUS_YET

    #
    # Error code.
    #
    @error = nil

    #
    # Error message.
    #
    @error_message = nil

    #
    # Rest of catenated short options.
    #
    @rest_singles = ''

    #
    # List of non-option-arguments.
    # Append them to ARGV when option processing is terminated.
    #
    @non_option_arguments = Array.new

    if 0 < arguments.length
      set_options(*arguments)
    end
  end

  #
  # Set the handling of the ordering of options and arguments.
  # A RuntimeError is raised if option processing has already started.
  #
  # The supplied value must be a member of GetoptLong::ORDERINGS. It alters
  # the processing of options as follows:
  #
  # <b>REQUIRE_ORDER</b> :
  #
  # Options are required to occur before non-options.
  #
  # Processing of options ends as soon as a word is encountered that has not
  # been preceded by an appropriate option flag.
  #
  # For example, if -a and -b are options which do not take arguments,
  # parsing command line arguments of '-a one -b two' would result in
  # 'one', '-b', 'two' being left in ARGV, and only ('-a', '') being
  # processed as an option/arg pair.
  #
  # This is the default ordering, if the environment variable
  # POSIXLY_CORRECT is set. (This is for compatibility with GNU getopt_long.)
  #
  # <b>PERMUTE</b> :
  #
  # Options can occur anywhere in the command line parsed. This is the
  # default behavior.
  #
  # Every sequence of words which can be interpreted as an option (with or
  # without argument) is treated as an option; non-option words are skipped.
  #
  # For example, if -a does not require an argument and -b optionally takes
  # an argument, parsing '-a one -b two three' would result in ('-a','') and
  # ('-b', 'two') being processed as option/arg pairs, and 'one','three'
  # being left in ARGV.
  #
  # If the ordering is set to PERMUTE but the environment variable
  # POSIXLY_CORRECT is set, REQUIRE_ORDER is used instead. This is for
  # compatibility with GNU getopt_long.
  #
  # <b>RETURN_IN_ORDER</b> :
  #
  # All words on the command line are processed as options. Words not
  # preceded by a short or long option flag are passed as arguments
  # with an option of '' (empty string).
  #
  # For example, if -a requires an argument but -b does not, a command line
  # of '-a one -b two three' would result in option/arg pairs of ('-a', 'one')
  # ('-b', ''), ('', 'two'), ('', 'three') being processed.
  #
  def ordering=(ordering)
    #
    # The method is failed if option processing has already started.
    #
    if @status != STATUS_YET
      set_error(ArgumentError, "argument error")
      raise RuntimeError,
"invoke ordering=, but option processing has already started"
    end

    #
    # Check ordering.
    #
    if !ORDERINGS.include?(ordering)
      raise ArgumentError, "invalid ordering `#{ordering}'"
    end
    if ordering == PERMUTE && ENV.include?('POSIXLY_CORRECT')
      @ordering = REQUIRE_ORDER
    else
      @ordering = ordering
    end
  end

  #
  # Return ordering.
  #
  attr_reader :ordering

  #
  # Set options. Takes the same argument as GetoptLong.new.
  #
  # Raises a RuntimeError if option processing has already started.
  #
  def set_options(*arguments)
    #
    # The method is failed if option processing has already started.
    #
    if @status != STATUS_YET
      raise RuntimeError,
"invoke set_options, but option processing has already started"
    end

    #
    # Clear tables of option names and argument flags.
    #
    @canonical_names.clear
    @argument_flags.clear

    arguments.each do |arg|
      #
      # Each argument must be an Array.
      #
      if !arg.is_a?(Array)
raise ArgumentError, "the option list contains non-Array argument"
      end

      #
      # Find an argument flag and it set to `argument_flag'.
      #
      argument_flag = nil
      arg.each do |i|
if ARGUMENT_FLAGS.include?(i)
if argument_flag != nil
raise ArgumentError, "too many argument-flags"
end
argument_flag = i
end
      end
      raise ArgumentError, "no argument-flag" if argument_flag == nil

      canonical_name = nil
      arg.each do |i|
#
# Check an option name.
#
next if i == argument_flag
begin
if !i.is_a?(String) || i !~ /^-([^-]|-.+)$/
raise ArgumentError, "an invalid option `#{i}'"
end
if (@canonical_names.include?(i))
raise ArgumentError, "option redefined `#{i}'"
end
rescue
@canonical_names.clear
@argument_flags.clear
raise
end

#
# Register the option (`i') to the `@canonical_names' and
# `@canonical_names' Hashes.
#
if canonical_name == nil
canonical_name = i
end
@canonical_names[i] = canonical_name
@argument_flags[i] = argument_flag
      end
      raise ArgumentError, "no option name" if canonical_name == nil
    end
    return self
  end

  #
  # Set/Unset `quiet' mode.
  #
  attr_writer :quiet

  #
  # Return the flag of `quiet' mode.
  #
  attr_reader :quiet

  #
  # `quiet?' is an alias of `quiet'.
  #
  alias quiet? quiet

  #
  # Explicitly terminate option processing.
  #
  def terminate
    return nil if @status == STATUS_TERMINATED
    raise RuntimeError, "an error has occured" if @error != nil

    @status = STATUS_TERMINATED
    @non_option_arguments.reverse_each do |argument|
      ARGV.unshift(argument)
    end

    @canonical_names = nil
    @argument_flags = nil
    @rest_singles = nil
    @non_option_arguments = nil

    return self
  end

  #
  # Returns true if option processing has terminated, false otherwise.
  #
  def terminated?
    return @status == STATUS_TERMINATED
  end

  #
  # Set an error (protected).
  #
  def set_error(type, message)
    $deferr.print("#{$0}: #{message}\n") if !@quiet

    @error = type
    @error_message = message
    @canonical_names = nil
    @argument_flags = nil
    @rest_singles = nil
    @non_option_arguments = nil

    raise type, message
  end
  protected :set_error

  #
  # Examine whether an option processing is failed.
  #
  attr_reader :error

  #
  # `error?' is an alias of `error'.
  #
  alias error? error

  # Return the appropriate error message in POSIX-defined format.
  # If no error has occurred, returns nil.
  #
  def error_message
    return @error_message
  end

  #
  # Get next option name and its argument, as an Array of two elements.
  #
  # The option name is always converted to the first (preferred)
  # name given in the original options to GetoptLong.new.
  #
  # Example: ['--option', 'value']
  #
  # Returns nil if the processing is complete (as determined by
  # STATUS_TERMINATED).
  #
  def get
    option_name, option_argument = nil, ''

    #
    # Check status.
    #
    return nil if @error != nil
    case @status
    when STATUS_YET
      @status = STATUS_STARTED
    when STATUS_TERMINATED
      return nil
    end

    #
    # Get next option argument.
    #
    if 0 < @rest_singles.length
      argument = '-' + @rest_singles
    elsif (ARGV.length == 0)
      terminate
      return nil
    elsif @ordering == PERMUTE
      while 0 < ARGV.length && ARGV[0] !~ /^-./
@non_option_arguments.push(ARGV.shift)
      end
      if ARGV.length == 0
terminate
return nil
      end
      argument = ARGV.shift
    elsif @ordering == REQUIRE_ORDER
      if (ARGV[0] !~ /^-./)
terminate
return nil
      end
      argument = ARGV.shift
    else
      argument = ARGV.shift
    end

    #
    # Check the special argument `--'.
    # `--' indicates the end of the option list.
    #
    if argument == '--' && @rest_singles.length == 0
      terminate
      return nil
    end

    #
    # Check for long and short options.
    #
    if argument =~ /^(--[^=]+)/ && @rest_singles.length == 0
      #
      # This is a long style option, which start with `--'.
      #
      pattern = $1
      if @canonical_names.include?(pattern)
option_name = pattern
      else
#
# The option `option_name' is not registered in `@canonical_names'.
# It may be an abbreviated.
#
match_count = 0
@canonical_names.each_key do |key|
if key.index(pattern) == 0
option_name = key
match_count += 1
end
end
if 2 <= match_count
set_error(AmbigousOption, "option `#{argument}' is ambiguous")
elsif match_count == 0
set_error(InvalidOption, "unrecognized option `#{argument}'")
end
      end

      #
      # Check an argument to the option.
      #
      if @argument_flags[option_name] == REQUIRED_ARGUMENT
if argument =~ /=(.*)$/
option_argument = $1
elsif 0 < ARGV.length
option_argument = ARGV.shift
else
set_error(MissingArgument,
"option `#{argument}' requires an argument")
end
      elsif @argument_flags[option_name] == OPTIONAL_ARGUMENT
if argument =~ /=(.*)$/
option_argument = $1
elsif 0 < ARGV.length && ARGV[0] !~ /^-./
option_argument = ARGV.shift
else
option_argument = ''
end
      elsif argument =~ /=(.*)$/
set_error(NeedlessArgument,
"option `#{option_name}' doesn't allow an argument")
      end

    elsif argument =~ /^(-(.))(.*)/
      #
      # This is a short style option, which start with `-' (not `--').
      # Short options may be catenated (e.g. `-l -g' is equivalent to
      # `-lg').
      #
      option_name, ch, @rest_singles = $1, $2, $3

      if @canonical_names.include?(option_name)
#
# The option `option_name' is found in `@canonical_names'.
# Check its argument.
#
if @argument_flags[option_name] == REQUIRED_ARGUMENT
if 0 < @rest_singles.length
option_argument = @rest_singles
@rest_singles = ''
elsif 0 < ARGV.length
option_argument = ARGV.shift
else
# 1003.2 specifies the format of this message.
set_error(MissingArgument, "option requires an argument -- #{ch}")
end
elsif @argument_flags[option_name] == OPTIONAL_ARGUMENT
if 0 < @rest_singles.length
option_argument = @rest_singles
@rest_singles = ''
elsif 0 < ARGV.length && ARGV[0] !~ /^-./
option_argument = ARGV.shift
else
option_argument = ''
end
end
      else
#
# This is an invalid option.
# 1003.2 specifies the format of this message.
#
if ENV.include?('POSIXLY_CORRECT')
set_error(InvalidOption, "illegal option -- #{ch}")
else
set_error(InvalidOption, "invalid option -- #{ch}")
end
      end
    else
      #
      # This is a non-option argument.
      # Only RETURN_IN_ORDER falled into here.
      #
      return '', argument
    end

    return @canonical_names[option_name], option_argument
  end

  #
  # `get_option' is an alias of `get'.
  #
  alias get_option get

  # Iterator version of `get'.
  #
  # The block is called repeatedly with two arguments:
  # The first is the option name.
  # The second is the argument which followed it (if any).
  # Example: ('--opt', 'value')
  #
  # The option name is always converted to the first (preferred)
  # name given in the original options to GetoptLong.new.
  #
  def each
    loop do
      option_name, option_argument = get_option
      break if option_name == nil
      yield option_name, option_argument
    end
  end

  #
  # `each_option' is an alias of `each'.
  #
  alias each_option each
end
Something went wrong with that request. Please try again.