Module: CLASP

Defined in:
lib/clasp/doc_.rb,
lib/clasp/cli.rb,
lib/clasp/clasp.rb,
lib/clasp/version.rb,
lib/clasp/arguments.rb,
lib/clasp/specifications.rb,
lib/clasp/util/exceptions.rb,
lib/clasp/util/value_parser.rb

Overview

:nodoc:

Defined Under Namespace

Modules: Exceptions, Util Classes: AliasSpecification, Arguments, FlagSpecification, OptionSpecification

Constant Summary collapse

VERSION =

Current version of the CLASP.Ruby library

'0.21.0'
VERSION_MAJOR =

Major version of the CLASP.Ruby library

VERSION_PARTS_[0]
VERSION_MINOR =

Minor version of the CLASP.Ruby library

VERSION_PARTS_[1]
VERSION_REVISION =

Revision version of the CLASP.Ruby library

VERSION_PARTS_[2]
Alias =

######################################################################## # backwards-compatible

AliasSpecification
Flag = 
FlagSpecification
FlagAlias = 
FlagSpecification
Option = 
OptionSpecification
OptionAlias = 
OptionSpecification

Class Method Summary collapse

Class Method Details

.Alias(name, *args) ⇒ Object 



435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
 
# File 'lib/clasp/specifications.rb', line 435

def CLASP.Alias(name, *args)

	options	=	args.pop if args[-1].is_a?(::Hash)
	options	||=	{}

	if options[:alias]

		aliases	=	[ options[:alias] ]
	elsif options[:aliases]

		aliases	=	options[:aliases]
	else

		aliases	=	args
	end

	CLASP::AliasSpecification.new name, aliases
end

.Flag(name, options = {}) ⇒ Object

Generator method that obtains a CLASP::FlagSpecification according to the given parameters

Signature

  • Parameters:

    • name (::String) The flag name, e.g. ‘–verbose’

    • options (::Hash) An options hash, containing any of the following options:

  • Options:

    • :alias (::String) An alias, e.g. ‘-v’

    • :aliases (::Array) An array of aliases, e.g. [ ‘-v’, ‘-verb’ ]. Ignored if :alias is specified

    • :extras An application-defined object, usually a hash of custom attributes

    • :help (::String) A help string



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
 
# File 'lib/clasp/specifications.rb', line 321

def CLASP.Flag(name, options = {})

	aliases	=	nil
	help	=	nil
	extras	=	nil

	options.each do |k, v|

		case	k
		when	Symbol
			case	k
			when	:alias

				aliases	=	[ v ] if v
			when	:aliases

				aliases	=	v unless aliases
			when	:help

				help	=	v
			when	:extras

				extras	=	v
			else

				raise ArgumentError, "invalid option for flag: '#{k}' => '#{v}'"
			end
		else

			raise ArgumentError, "invalid option type for flag: '#{k}' (#{k.class}) => '#{v}'"
		end
	end

	CLASP::FlagSpecification.new(name, aliases, help, extras)
end

.Option(name, options = {}) ⇒ Object

Generator method that obtains a CLASP::OptionSpecification according to the given parameters

Signature

  • Parameters:

    • name (::String) The flag name, e.g. ‘–verbose’

    • options (::Hash) An options hash, containing any of the following options:

  • Options:

    • :alias (::String) An alias, e.g. ‘-v’

    • :aliases (::Array) An array of aliases, e.g. [ ‘-v’, ‘-verb’ ]. Ignored if :alias is specified

    • :default_value The default value for the option

    • :default [DEPRECATED] Alternative to :default_value

    • :extras An application-defined object, usually a hash of custom attributes

    • :help (::String) A help string

    • required (boolean) Whether the option is required. May be nil

    • required_message (::String) Message to be used when reporting that a required option is missing. May be nil in which case a message of the form “<option-name> not specified; use –help for usage”. If begins with the nul character (“0”), then is used in the place of the <option-name> and placed into the rest of the standard form message

    • extras An application-defined additional parameter. If nil, it is assigned an empty Hash.

    • constraint (Hash) Constraint to be applied to the parsed values of options matching this specification. NOTE: only integer constraints are supported in the current version

    • :values_range (::Array) An array defining the accepted values for the option

    • :values [DEPRECATED] Alternative to :values_range



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
 
# File 'lib/clasp/specifications.rb', line 379

def CLASP.Option(name, options = {})

	aliases			=	nil
	help			=	nil
	values_range	=	nil
	default_value	=	nil
	required		=	false
	require_message	=	nil
	constraint		=	nil
	extras			=	nil

	options.each do |k, v|

		case	k
		when	Symbol
			case	k
			when	:alias

				aliases	=	[ v ] if v
			when	:aliases

				aliases	=	v unless aliases
			when	:help

				help	=	v
			when	:values_range, :values

				values_range	=	v
			when	:default_value, :default

				default_value	=	v
			when	:required

				required	=	v
			when	:required_message

				require_message	=	v
			when	:extras

				extras	=	v
			when	:constraint

				constraint	=	v
			else

				raise ArgumentError, "invalid option for option: '#{k}' => '#{v}'"
			end
		else

			raise ArgumentError, "invalid option type for option: '#{k}' (#{k.class}) => '#{v}'"
		end
	end

	CLASP::OptionSpecification.new(name, aliases, help, values_range, default_value, required, require_message, constraint, extras)
end

.parse(argv = ARGV, specifications = nil, options = {}) ⇒ Object

TBC (but is a shorthand for calling Arguments.new()



56
57
58
59
 
# File 'lib/clasp/clasp.rb', line 56

def self.parse(argv = ARGV, specifications = nil, options = {})

	return Arguments.new(argv, specifications, options)
end

.show_usage(specifications, options = {}) ⇒ Object

Displays usage for the program according to the given specifications and options

Signature

  • Parameters:

    • specifications (Array) The arguments array. May not be nil. Defaults to ARGV.

    • options An options hash, containing any of the following options.

  • Options:

    • :exit a program exit code; exit() not called if not specified (or nil).

    • :program_name program name; inferred from $0 if not specified.

    • :stream output stream; $stdout if not specified.

    • :suppress_blank_lines_between_options does exactly what it says on the tin.

    • :values appends this string to USAGE line if specified.

    • :flags_and_options inserts a custom string instead of the default string '[ ... flags and options ... ]'.

    • :info_lines inserts 0+ information lines prior to the usage.

    • :default_indicator (String) a string placed after the matching value in the listing of an option’s range of values. Defaults to “(default)”. If nil default is used. If empty string no indication given

Raises:

  • (ArgumentError) 


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
 
# File 'lib/clasp/cli.rb', line 133

def self.show_usage specifications, options={}

	options	||=	{}

	raise ArgumentError, "specifications may not be nil" if specifications.nil?
	raise TypeError, "specifications must be an array or must respond to each, reject and select" unless ::Array === specifications || (specifications.respond_to?(:each) && specifications.respond_to?(:reject) && specifications.respond_to?(:select))

	constants		=	CLI_helpers_::Constants
	specifications.each { |s| raise ::TypeError, "each element in specifications array must be one of the types #{constants::VALID_ALIAS_TYPES_STRING}" unless constants::VALID_ALIAS_TYPES.any? { |c| c === s } }

	alias_dups = {}
	specifications.each { |s| s.aliases.each { |aa| warn "WARNING: alias '#{aa}' is already used for specification '#{s}'" if alias_dups.has_key? aa; alias_dups[aa] = s; } }

	suppress_blanks	=	options[:suppress_blank_lines_between_options] || ENV['SUPPRESS_BLANK_LINES_BETWEEN_OPTIONS']

	stream			=	options[:stream] || $stdout
	program_name	=	options[:program_name] || File.basename($0)

	info_lines		=	options[:info_lines]
	case info_lines
	when ::Array

		;
	when ::NilClass

		info_lines	=	[]
	else

		info_lines = [ info_lines ] unless [ :each, :empty? ].all? { |m| info_lines.respond_to? m }
	end
	info_lines		=	info_lines.map do |line|

		case line
		when :version

			CLI_helpers_.generate_version_string_ options
		else

			line
		end
	end

	values			=	options[:values] || ''
	values			=	" #{values}" if !values.empty? && ' ' != values[0]

	flags_and_options	=	options[:flags_and_options] || ' [ ... flags and options ... ]'
	flags_and_options	=	" #{flags_and_options}" if !flags_and_options.empty? && ' ' != flags_and_options[0]

	default_indicator	=	options[:default_indicator] || '(default)'
	default_indicator	=	nil if default_indicator.empty?

	# sift the specifications to sort out which are value-option
	# specifications (VOAs)

	voas			=	{}

	specifications.select { |s| s.name =~ /^-+[a-zA-Z0-3_-]+[=:].+/ }.each do |s|

		s.name =~ /^(-+[a-zA-Z0-3_-]+)[=:](.+)$/

		voas[$1]	=	[] unless voas.has_key? $1
		voas[$1]	<<	[ s, $2 ]
	end

	fas				=	{}

	specifications.select { |s| AliasSpecification === s }.each do |s|

		fas[s.name]	=	[] unless fas.has_key? $1
		fas[s.name]	<<	s
	end

	specifications	=	specifications.reject { |s| s.name =~ /^-+[a-zA-Z0-3_-]+[=:].+/ }

	info_lines.each { |info_line| stream.puts info_line } unless info_lines.empty?

	stream.puts "USAGE: #{program_name}#{flags_and_options}#{values}"
	stream.puts

	unless specifications.empty?

		stream.puts "flags/options:"
		stream.puts
		specifications.each do |s|

			case s
			when AliasSpecification

				next
			when FlagSpecification

				if fas.has_key? s.name

					fas[s.name].each do |fa|

						fa.aliases.each { |al| stream.puts "\t#{al}" }
					end
				end
				s.aliases.each { |al| stream.puts "\t#{al}" }
				stream.puts "\t#{s.name}"
				stream.puts "\t\t#{s.help}"
			when OptionSpecification

				if voas.has_key? s.name

					voas[s.name].each do |ar|

						ar[0].aliases.each { |al| stream.puts "\t#{al} #{ar[0].name}" }
					end
				end
				s.aliases.each { |al| stream.puts "\t#{al} <value>" }
				stream.puts "\t#{s.name}=<value>"
				stream.puts "\t\t#{s.help}"
				unless s.values_range.empty?

					d = s.default_value

					stream.puts "\t\twhere <value> one of:"
					s.values_range.each do |v|

						if default_indicator && v == d

							stream.puts "\t\t\t#{v}\t#{default_indicator}"
						else

							stream.puts "\t\t\t#{v}"
						end
					end
				end
			end
			stream.puts unless suppress_blanks
		end
	end

	exit_code		=	options[:exit_code] || options[:exit]

	exit exit_code if exit_code
end

.show_version(specifications, options = {}) ⇒ Object

Displays version for the program according to the given specifications and options

Signature

  • Parameters:

    • specifications (Array) The arguments array. May not be nil. Defaults to ARGV.

    • options An options hash, containing any of the following options.

  • Options:

    • :exit a program exit code; exit() not called if not specified (or nil).

    • :program_name program name; inferred from $0 if not specified.

    • :stream output stream; $stdout if not specified.

    • :version an array (of N elements, each of which will be separated by a period ‘.’), or a string. Must be specified if not :version_major.

    • :version_major a number or string. Only considered and must be specified if :version is not.

    • :version_minor a number or string. Only considered if :version is not.

    • :version_revision a number or string. Only considered if :version is not.

    • :version_build a number or string. Only considered if :version is not.

    • :version_prefix optional string to prefix the version number(s).

Raises:

  • (ArgumentError) 


290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
 
# File 'lib/clasp/cli.rb', line 290

def self.show_version specifications, options = {}

	options	||=	{}

	raise ArgumentError, "specifications may not be nil" if specifications.nil?
	raise TypeError, "specifications must be an array or must respond to each, reject and select" unless ::Array === specifications || (specifications.respond_to?(:each) && specifications.respond_to?(:reject) && specifications.respond_to?(:select))

	constants		=	CLI_helpers_::Constants
	specifications.each { |s| raise ::TypeError, "each element in specifications array must be one of the types #{constants::VALID_ALIAS_TYPES_STRING}" unless constants::VALID_ALIAS_TYPES.any? { |c| c === s } }

	stream			=	options[:stream] || $stdout

	version_string	=	CLI_helpers_.generate_version_string_ options

	stream.puts version_string

	exit_code		=	options[:exit_code] || options[:exit]

	exit exit_code if exit_code
end