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

'0.23.0.1'
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 



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# File 'lib/clasp/specifications.rb', line 513

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 = {}, &blk) ⇒ 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

  • Block An optional block that is called when a matching flag argument is found



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# File 'lib/clasp/specifications.rb', line 397

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

	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, &blk)
end

.Option(name, options = {}, &blk) ⇒ 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

  • Block An optional block that is called when a matching option argument is found



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# File 'lib/clasp/specifications.rb', line 457

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

	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, &blk)
end

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

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



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# 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) 


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# 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) 


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# 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