[ PARENT ]

EDIT :: optparse.rb

# # optparse.rb - command-line option analysis with the OptionParser class. # # Author:: Nobu Nakada # Documentation:: Nobu Nakada and Gavin Sinclair. # # See OptionParser for documentation. # # == Developer Documentation (not for RDoc output) # # === Class tree # # - OptionParser:: front end # - OptionParser::Switch:: each switches # - OptionParser::List:: options list # - OptionParser::ParseError:: errors on parsing # - OptionParser::AmbiguousOption # - OptionParser::NeedlessArgument # - OptionParser::MissingArgument # - OptionParser::InvalidOption # - OptionParser::InvalidArgument # - OptionParser::AmbiguousArgument # # === Object relationship diagram # # +--------------+ # | OptionParser |<>-----+ # +--------------+ | +--------+ # | ,-| Switch | # on_head -------->+---------------+ / +--------+ # accept/reject -->| List |<|>- # | |<|>- +----------+ # on ------------->+---------------+ `-| argument | # : : | class | # +---------------+ |==========| # on_tail -------->| | |pattern | # +---------------+ |----------| # OptionParser.accept ->| DefaultList | |converter | # reject |(shared between| +----------+ # | all instances)| # +---------------+ # # == OptionParser # # === Introduction # # OptionParser is a class for command-line option analysis. It is much more # advanced, yet also easier to use, than GetoptLong, and is a more Ruby-oriented # solution. # # === Features # # 1. The argument specification and the code to handle it are written in the # same place. # 2. It can output an option summary; you don't need to maintain this string # separately. # 3. Optional and mandatory arguments are specified very gracefully. # 4. Arguments can be automatically converted to a specified class. # 5. Arguments can be restricted to a certain set. # # All of these features are demonstrated in the examples below. # # === Minimal example # # require 'optparse' # # options = {} # OptionParser.new do |opts| # opts.banner = "Usage: example.rb [options]" # # opts.on("-v", "--[no-]verbose", "Run verbosely") do |v| # options[:verbose] = v # end # end.parse! # # p options # p ARGV # # === Complete example # # The following example is a complete Ruby program. You can run it and see the # effect of specifying various options. This is probably the best way to learn # the features of +optparse+. # # require 'optparse' # require 'optparse/time' # require 'ostruct' # require 'pp' # # class OptparseExample # # CODES = %w[iso-2022-jp shift_jis euc-jp utf8 binary] # CODE_ALIASES = { "jis" => "iso-2022-jp", "sjis" => "shift_jis" } # # # # # Return a structure describing the options. # # # def self.parse(args) # # The options specified on the command line will be collected in *options*. # # We set default values here. # options = OpenStruct.new # options.library = [] # options.inplace = false # options.encoding = "utf8" # options.transfer_type = :auto # options.verbose = false # # opts = OptionParser.new do |opts| # opts.banner = "Usage: example.rb [options]" # # opts.separator "" # opts.separator "Specific options:" # # # Mandatory argument. # opts.on("-r", "--require LIBRARY", # "Require the LIBRARY before executing your script") do |lib| # options.library << lib # end # # # Optional argument; multi-line description. # opts.on("-i", "--inplace [EXTENSION]", # "Edit ARGV files in place", # " (make backup if EXTENSION supplied)") do |ext| # options.inplace = true # options.extension = ext || '' # options.extension.sub!(/\A\.?(?=.)/, ".") # Ensure extension begins with dot. # end # # # Cast 'delay' argument to a Float. # opts.on("--delay N", Float, "Delay N seconds before executing") do |n| # options.delay = n # end # # # Cast 'time' argument to a Time object. # opts.on("-t", "--time [TIME]", Time, "Begin execution at given time") do |time| # options.time = time # end # # # Cast to octal integer. # opts.on("-F", "--irs [OCTAL]", OptionParser::OctalInteger, # "Specify record separator (default \\0)") do |rs| # options.record_separator = rs # end # # # List of arguments. # opts.on("--list x,y,z", Array, "Example 'list' of arguments") do |list| # options.list = list # end # # # Keyword completion. We are specifying a specific set of arguments (CODES # # and CODE_ALIASES - notice the latter is a Hash), and the user may provide # # the shortest unambiguous text. # code_list = (CODE_ALIASES.keys + CODES).join(',') # opts.on("--code CODE", CODES, CODE_ALIASES, "Select encoding", # " (#{code_list})") do |encoding| # options.encoding = encoding # end # # # Optional argument with keyword completion. # opts.on("--type [TYPE]", [:text, :binary, :auto], # "Select transfer type (text, binary, auto)") do |t| # options.transfer_type = t # end # # # Boolean switch. # opts.on("-v", "--[no-]verbose", "Run verbosely") do |v| # options.verbose = v # end # # opts.separator "" # opts.separator "Common options:" # # # No argument, shows at tail. This will print an options summary. # # Try it and see! # opts.on_tail("-h", "--help", "Show this message") do # puts opts # exit # end # # # Another typical switch to print the version. # opts.on_tail("--version", "Show version") do # puts OptionParser::Version.join('.') # exit # end # end # # opts.parse!(args) # options # end # parse() # # end # class OptparseExample # # options = OptparseExample.parse(ARGV) # pp options # # === Further documentation # # The above examples should be enough to learn how to use this class. If you # have any questions, email me (gsinclair@soyabean.com.au) and I will update # this document. # class OptionParser # :stopdoc: RCSID = %w$Id: optparse.rb 22469 2009-02-20 11:43:35Z shyouhei $[1..-1].each {|s| s.freeze}.freeze Version = (RCSID[1].split('.').collect {|s| s.to_i}.extend(Comparable).freeze if RCSID[1]) LastModified = (Time.gm(*RCSID[2, 2].join('-').scan(/\d+/).collect {|s| s.to_i}) if RCSID[2]) Release = RCSID[2] NoArgument = [NO_ARGUMENT = :NONE, nil].freeze RequiredArgument = [REQUIRED_ARGUMENT = :REQUIRED, true].freeze OptionalArgument = [OPTIONAL_ARGUMENT = :OPTIONAL, false].freeze # :startdoc: # # Keyword completion module. This allows partial arguments to be specified # and resolved against a list of acceptable values. # module Completion def complete(key, icase = false, pat = nil) pat ||= Regexp.new('\A' + Regexp.quote(key).gsub(/\w+\b/, '\&\w*'), icase) canon, sw, k, v, cn = nil candidates = [] each do |k, *v| (if Regexp === k kn = nil k === key else kn = defined?(k.id2name) ? k.id2name : k pat === kn end) or next v << k if v.empty? candidates << [k, v, kn] end candidates = candidates.sort_by {|k, v, kn| kn.size} if candidates.size == 1 canon, sw, * = candidates[0] elsif candidates.size > 1 canon, sw, cn = candidates.shift candidates.each do |k, v, kn| next if sw == v if String === cn and String === kn if cn.rindex(kn, 0) canon, sw, cn = k, v, kn next elsif kn.rindex(cn, 0) next end end throw :ambiguous, key end end if canon block_given? or return key, *sw yield(key, *sw) end end def convert(opt = nil, val = nil, *) val end end # # Map from option/keyword string to object with completion. # class OptionMap < Hash include Completion end # # Individual switch class. Not important to the user. # # Defined within Switch are several Switch-derived classes: NoArgument, # RequiredArgument, etc. # class Switch attr_reader :pattern, :conv, :short, :long, :arg, :desc, :block # # Guesses argument style from +arg+. Returns corresponding # OptionParser::Switch class (OptionalArgument, etc.). # def self.guess(arg) case arg when "" t = self when /\A=?\[/ t = Switch::OptionalArgument when /\A\s+\[/ t = Switch::PlacedArgument else t = Switch::RequiredArgument end self >= t or incompatible_argument_styles(arg, t) t end def self.incompatible_argument_styles(arg, t) raise ArgumentError, "#{arg}: incompatible argument styles\n #{self}, #{t}" end def self.pattern NilClass end def initialize(pattern = nil, conv = nil, short = nil, long = nil, arg = nil, desc = ([] if short or long), block = Proc.new) raise if Array === pattern @pattern, @conv, @short, @long, @arg, @desc, @block = pattern, conv, short, long, arg, desc, block end # # Parses +arg+ and returns rest of +arg+ and matched portion to the # argument pattern. Yields when the pattern doesn't match substring. # def parse_arg(arg) pattern or return nil, arg unless m = pattern.match(arg) yield(InvalidArgument, arg) return arg, nil end if String === m m = [s = m] else m = m.to_a s = m[0] return nil, m unless String === s end raise InvalidArgument, arg unless arg.rindex(s, 0) return nil, m if s.length == arg.length yield(InvalidArgument, arg) # didn't match whole arg return arg[s.length..-1], m end private :parse_arg # # Parses argument, converts and returns +arg+, +block+ and result of # conversion. Yields at semi-error condition instead of raising an # exception. # def conv_arg(arg, val = nil) if conv val = conv.call(*val) else val = proc {|val| val}.call(*val) end return arg, block, val end private :conv_arg # # Produces the summary text. Each line of the summary is yielded to the # block (without newline). # # +sdone+:: Already summarized short style options keyed hash. # +ldone+:: Already summarized long style options keyed hash. # +width+:: Width of left side (option part). In other words, the right # side (description part) starts after +width+ columns. # +max+:: Maximum width of left side -> the options are filled within # +max+ columns. # +indent+:: Prefix string indents all summarized lines. # def summarize(sdone = [], ldone = [], width = 1, max = width - 1, indent = "") sopts, lopts, s = [], [], nil @short.each {|s| sdone.fetch(s) {sopts << s}; sdone[s] = true} if @short @long.each {|s| ldone.fetch(s) {lopts << s}; ldone[s] = true} if @long return if sopts.empty? and lopts.empty? # completely hidden left = [sopts.join(', ')] right = desc.dup while s = lopts.shift l = left[-1].length + s.length l += arg.length if left.size == 1 && arg l < max or sopts.empty? or left << '' left[-1] << if left[-1].empty? then ' ' * 4 else ', ' end << s end left[0] << arg if arg mlen = left.collect {|s| s.length}.max.to_i while mlen > width and l = left.shift mlen = left.collect {|s| s.length}.max.to_i if l.length == mlen yield(indent + l) end while begin l = left.shift; r = right.shift; l or r end l = l.to_s.ljust(width) + ' ' + r if r and !r.empty? yield(indent + l) end self end def add_banner(to) # :nodoc: unless @short or @long s = desc.join to << " [" + s + "]..." unless s.empty? end to end def match_nonswitch?(str) # :nodoc: @pattern =~ str unless @short or @long end # # Main name of the switch. # def switch_name (long.first || short.first).sub(/\A-+(?:\[no-\])?/, '') end # # Switch that takes no arguments. # class NoArgument < self # # Raises an exception if any arguments given. # def parse(arg, argv) yield(NeedlessArgument, arg) if arg conv_arg(arg) end def self.incompatible_argument_styles(*) end def self.pattern Object end end # # Switch that takes an argument. # class RequiredArgument < self # # Raises an exception if argument is not present. # def parse(arg, argv) unless arg raise MissingArgument if argv.empty? arg = argv.shift end conv_arg(*parse_arg(arg) {|*exc| raise(*exc)}) end end # # Switch that can omit argument. # class OptionalArgument < self # # Parses argument if given, or uses default value. # def parse(arg, argv, &error) if arg conv_arg(*parse_arg(arg, &error)) else conv_arg(arg) end end end # # Switch that takes an argument, which does not begin with '-'. # class PlacedArgument < self # # Returns nil if argument is not present or begins with '-'. # def parse(arg, argv, &error) if !(val = arg) and (argv.empty? or /\A-/ =~ (val = argv[0])) return nil, block, nil end opt = (val = parse_arg(val, &error))[1] val = conv_arg(*val) if opt and !arg argv.shift else val[0] = nil end val end end end # # Simple option list providing mapping from short and/or long option # string to OptionParser::Switch and mapping from acceptable argument to # matching pattern and converter pair. Also provides summary feature. # class List # Map from acceptable argument types to pattern and converter pairs. attr_reader :atype # Map from short style option switches to actual switch objects. attr_reader :short # Map from long style option switches to actual switch objects. attr_reader :long # List of all switches and summary string. attr_reader :list # # Just initializes all instance variables. # def initialize @atype = {} @short = OptionMap.new @long = OptionMap.new @list = [] end # # See OptionParser.accept. # def accept(t, pat = /.*/nm, &block) if pat pat.respond_to?(:match) or raise TypeError, "has no `match'" else pat = t if t.respond_to?(:match) end unless block block = pat.method(:convert).to_proc if pat.respond_to?(:convert) end @atype[t] = [pat, block] end # # See OptionParser.reject. # def reject(t) @atype.delete(t) end # # Adds +sw+ according to +sopts+, +lopts+ and +nlopts+. # # +sw+:: OptionParser::Switch instance to be added. # +sopts+:: Short style option list. # +lopts+:: Long style option list. # +nlopts+:: Negated long style options list. # def update(sw, sopts, lopts, nsw = nil, nlopts = nil) o = nil sopts.each {|o| @short[o] = sw} if sopts lopts.each {|o| @long[o] = sw} if lopts nlopts.each {|o| @long[o] = nsw} if nsw and nlopts used = @short.invert.update(@long.invert) @list.delete_if {|o| Switch === o and !used[o]} end private :update # # Inserts +switch+ at the head of the list, and associates short, long # and negated long options. Arguments are: # # +switch+:: OptionParser::Switch instance to be inserted. # +short_opts+:: List of short style options. # +long_opts+:: List of long style options. # +nolong_opts+:: List of long style options with "no-" prefix. # # prepend(switch, short_opts, long_opts, nolong_opts) # def prepend(*args) update(*args) @list.unshift(args[0]) end # # Appends +switch+ at the tail of the list, and associates short, long # and negated long options. Arguments are: # # +switch+:: OptionParser::Switch instance to be inserted. # +short_opts+:: List of short style options. # +long_opts+:: List of long style options. # +nolong_opts+:: List of long style options with "no-" prefix. # # append(switch, short_opts, long_opts, nolong_opts) # def append(*args) update(*args) @list.push(args[0]) end # # Searches +key+ in +id+ list. The result is returned or yielded if a # block is given. If it isn't found, nil is returned. # def search(id, key) if list = __send__(id) val = list.fetch(key) {return nil} block_given? ? yield(val) : val end end # # Searches list +id+ for +opt+ and the optional patterns for completion # +pat+. If +icase+ is true, the search is case insensitive. The result # is returned or yielded if a block is given. If it isn't found, nil is # returned. # def complete(id, opt, icase = false, *pat, &block) __send__(id).complete(opt, icase, *pat, &block) end # # Iterates over each option, passing the option to the +block+. # def each_option(&block) list.each(&block) end # # Creates the summary table, passing each line to the +block+ (without # newline). The arguments +args+ are passed along to the summarize # method which is called on every option. # def summarize(*args, &block) sum = [] list.reverse_each do |opt| if opt.respond_to?(:summarize) # perhaps OptionParser::Switch s = [] opt.summarize(*args) {|l| s << l} sum.concat(s.reverse) elsif !opt or opt.empty? sum << "" elsif opt.respond_to?(:each_line) sum.concat([*opt.each_line].reverse) else sum.concat([*opt.each].reverse) end end sum.reverse_each(&block) end def add_banner(to) # :nodoc: list.each do |opt| if opt.respond_to?(:add_banner) opt.add_banner(to) end end to end end # # Hash with completion search feature. See OptionParser::Completion. # class CompletingHash < Hash include Completion # # Completion for hash key. # def match(key) return key, *fetch(key) { raise AmbiguousArgument, catch(:ambiguous) {return complete(key)} } end end # :stopdoc: # # Enumeration of acceptable argument styles. Possible values are: # # NO_ARGUMENT:: The switch takes no arguments. (:NONE) # REQUIRED_ARGUMENT:: The switch requires an argument. (:REQUIRED) # OPTIONAL_ARGUMENT:: The switch requires an optional argument. (:OPTIONAL) # # Use like --switch=argument (long style) or -Xargument (short style). For # short style, only portion matched to argument pattern is dealed as # argument. # ArgumentStyle = {} NoArgument.each {|el| ArgumentStyle[el] = Switch::NoArgument} RequiredArgument.each {|el| ArgumentStyle[el] = Switch::RequiredArgument} OptionalArgument.each {|el| ArgumentStyle[el] = Switch::OptionalArgument} ArgumentStyle.freeze # # Switches common used such as '--', and also provides default # argument classes # DefaultList = List.new DefaultList.short['-'] = Switch::NoArgument.new {} DefaultList.long[''] = Switch::NoArgument.new {throw :terminate} # # Default options for ARGV, which never appear in option summary. # Officious = {} # # --help # Shows option summary. # Officious['help'] = proc do |parser| Switch::NoArgument.new do puts parser.help exit end end # # --version # Shows version string if Version is defined. # Officious['version'] = proc do |parser| Switch::OptionalArgument.new do |pkg| if pkg begin require 'optparse/version' rescue LoadError else show_version(*pkg.split(/,/)) or abort("#{parser.program_name}: no version found in package #{pkg}") exit end end v = parser.ver or abort("#{parser.program_name}: version unknown") puts v exit end end # :startdoc: # # Class methods # # # Initializes a new instance and evaluates the optional block in context # of the instance. Arguments +args+ are passed to #new, see there for # description of parameters. # # This method is *deprecated*, its behavior corresponds to the older #new # method. # def self.with(*args, &block) opts = new(*args) opts.instance_eval(&block) opts end # # Returns an incremented value of +default+ according to +arg+. # def self.inc(arg, default = nil) case arg when Integer arg.nonzero? when nil default.to_i + 1 end end def inc(*args) self.class.inc(*args) end # # Initializes the instance and yields itself if called with a block. # # +banner+:: Banner message. # +width+:: Summary width. # +indent+:: Summary indent. # def initialize(banner = nil, width = 32, indent = ' ' * 4) @stack = [DefaultList, List.new, List.new] @program_name = nil @banner = banner @summary_width = width @summary_indent = indent @default_argv = ARGV add_officious yield self if block_given? end def add_officious # :nodoc: list = base() Officious.each do |opt, block| list.long[opt] ||= block.call(self) end end # # Terminates option parsing. Optional parameter +arg+ is a string pushed # back to be the first non-option argument. # def terminate(arg = nil) self.class.terminate(arg) end def self.terminate(arg = nil) throw :terminate, arg end @stack = [DefaultList] def self.top() DefaultList end # # Directs to accept specified class +t+. The argument string is passed to # the block in which it should be converted to the desired class. # # +t+:: Argument class specifier, any object including Class. # +pat+:: Pattern for argument, defaults to +t+ if it responds to match. # # accept(t, pat, &block) # def accept(*args, &blk) top.accept(*args, &blk) end # # See #accept. # def self.accept(*args, &blk) top.accept(*args, &blk) end # # Directs to reject specified class argument. # # +t+:: Argument class specifier, any object including Class. # # reject(t) # def reject(*args, &blk) top.reject(*args, &blk) end # # See #reject. # def self.reject(*args, &blk) top.reject(*args, &blk) end # # Instance methods # # Heading banner preceding summary. attr_writer :banner # Program name to be emitted in error message and default banner, # defaults to $0. attr_writer :program_name # Width for option list portion of summary. Must be Numeric. attr_accessor :summary_width # Indentation for summary. Must be String (or have + String method). attr_accessor :summary_indent # Strings to be parsed in default. attr_accessor :default_argv # # Heading banner preceding summary. # def banner unless @banner @banner = "Usage: #{program_name} [options]" visit(:add_banner, @banner) end @banner end # # Program name to be emitted in error message and default banner, defaults # to $0. # def program_name @program_name || File.basename($0, '.*') end # for experimental cascading :-) alias set_banner banner= alias set_program_name program_name= alias set_summary_width summary_width= alias set_summary_indent summary_indent= # Version attr_writer :version # Release code attr_writer :release # # Version # def version @version || (defined?(::Version) && ::Version) end # # Release code # def release @release || (defined?(::Release) && ::Release) || (defined?(::RELEASE) && ::RELEASE) end # # Returns version string from program_name, version and release. # def ver if v = version str = "#{program_name} #{[v].join('.')}" str << " (#{v})" if v = release str end end def warn(mesg = $!) super("#{program_name}: #{mesg}") end def abort(mesg = $!) super("#{program_name}: #{mesg}") end # # Subject of #on / #on_head, #accept / #reject # def top @stack[-1] end # # Subject of #on_tail. # def base @stack[1] end # # Pushes a new List. # def new @stack.push(List.new) if block_given? yield self else self end end # # Removes the last List. # def remove @stack.pop end # # Puts option summary into +to+ and returns +to+. Yields each line if # a block is given. # # +to+:: Output destination, which must have method <<. Defaults to []. # +width+:: Width of left side, defaults to @summary_width. # +max+:: Maximum length allowed for left side, defaults to +width+ - 1. # +indent+:: Indentation, defaults to @summary_indent. # def summarize(to = [], width = @summary_width, max = width - 1, indent = @summary_indent, &blk) blk ||= proc {|l| to << (l.index($/, -1) ? l : l + $/)} visit(:summarize, {}, {}, width, max, indent, &blk) to end # # Returns option summary string. # def help; summarize(banner.to_s.sub(/\n?\z/, "\n")) end alias to_s help # # Returns option summary list. # def to_a; summarize(banner.to_a.dup) end # # Checks if an argument is given twice, in which case an ArgumentError is # raised. Called from OptionParser#switch only. # # +obj+:: New argument. # +prv+:: Previously specified argument. # +msg+:: Exception message. # def notwice(obj, prv, msg) unless !prv or prv == obj begin raise ArgumentError, "argument #{msg} given twice: #{obj}" rescue $@[0, 2] = nil raise end end obj end private :notwice # # Creates an OptionParser::Switch from the parameters. The parsed argument # value is passed to the given block, where it can be processed. # # See at the beginning of OptionParser for some full examples. # # +opts+ can include the following elements: # # [Argument style:] # One of the following: # :NONE, :REQUIRED, :OPTIONAL # # [Argument pattern:] # Acceptable option argument format, must be pre-defined with # OptionParser.accept or OptionParser#accept, or Regexp. This can appear # once or assigned as String if not present, otherwise causes an # ArgumentError. Examples: # Float, Time, Array # # [Possible argument values:] # Hash or Array. # [:text, :binary, :auto] # %w[iso-2022-jp shift_jis euc-jp utf8 binary] # { "jis" => "iso-2022-jp", "sjis" => "shift_jis" } # # [Long style switch:] # Specifies a long style switch which takes a mandatory, optional or no # argument. It's a string of the following form: # "--switch=MANDATORY" or "--switch MANDATORY" # "--switch[=OPTIONAL]" # "--switch" # # [Short style switch:] # Specifies short style switch which takes a mandatory, optional or no # argument. It's a string of the following form: # "-xMANDATORY" # "-x[OPTIONAL]" # "-x" # There is also a special form which matches character range (not full # set of regular expression): # "-[a-z]MANDATORY" # "-[a-z][OPTIONAL]" # "-[a-z]" # # [Argument style and description:] # Instead of specifying mandatory or optional arguments directly in the # switch parameter, this separate parameter can be used. # "=MANDATORY" # "=[OPTIONAL]" # # [Description:] # Description string for the option. # "Run verbosely" # # [Handler:] # Handler for the parsed argument value. Either give a block or pass a # Proc or Method as an argument. # def make_switch(opts, block = nil) short, long, nolong, style, pattern, conv, not_pattern, not_conv, not_style = [], [], [] ldesc, sdesc, desc, arg = [], [], [] default_style = Switch::NoArgument default_pattern = nil klass = nil o = nil n, q, a = nil opts.each do |o| # argument class next if search(:atype, o) do |pat, c| klass = notwice(o, klass, 'type') if not_style and not_style != Switch::NoArgument not_pattern, not_conv = pat, c else default_pattern, conv = pat, c end end # directly specified pattern(any object possible to match) if !(String === o) and o.respond_to?(:match) pattern = notwice(o, pattern, 'pattern') conv = pattern.method(:convert).to_proc if pattern.respond_to?(:convert) next end # anything others case o when Proc, Method block = notwice(o, block, 'block') when Array, Hash case pattern when CompletingHash when nil pattern = CompletingHash.new conv = pattern.method(:convert).to_proc if pattern.respond_to?(:convert) else raise ArgumentError, "argument pattern given twice" end o.each {|(o, *v)| pattern[o] = v.fetch(0) {o}} when Module raise ArgumentError, "unsupported argument type: #{o}" when *ArgumentStyle.keys style = notwice(ArgumentStyle[o], style, 'style') when /^--no-([^\[\]=\s]*)(.+)?/ q, a = $1, $2 o = notwice(a ? Object : TrueClass, klass, 'type') not_pattern, not_conv = search(:atype, o) unless not_style not_style = (not_style || default_style).guess(arg = a) if a default_style = Switch::NoArgument default_pattern, conv = search(:atype, FalseClass) unless default_pattern ldesc << "--no-#{q}" long << 'no-' + (q = q.downcase) nolong << q when /^--\[no-\]([^\[\]=\s]*)(.+)?/ q, a = $1, $2 o = notwice(a ? Object : TrueClass, klass, 'type') if a default_style = default_style.guess(arg = a) default_pattern, conv = search(:atype, o) unless default_pattern end ldesc << "--[no-]#{q}" long << (o = q.downcase) not_pattern, not_conv = search(:atype, FalseClass) unless not_style not_style = Switch::NoArgument nolong << 'no-' + o when /^--([^\[\]=\s]*)(.+)?/ q, a = $1, $2 if a o = notwice(NilClass, klass, 'type') default_style = default_style.guess(arg = a) default_pattern, conv = search(:atype, o) unless default_pattern end ldesc << "--#{q}" long << (o = q.downcase) when /^-(\[\^?\]?(?:[^\\\]]|\\.)*\])(.+)?/ q, a = $1, $2 o = notwice(Object, klass, 'type') if a default_style = default_style.guess(arg = a) default_pattern, conv = search(:atype, o) unless default_pattern end sdesc << "-#{q}" short << Regexp.new(q) when /^-(.)(.+)?/ q, a = $1, $2 if a o = notwice(NilClass, klass, 'type') default_style = default_style.guess(arg = a) default_pattern, conv = search(:atype, o) unless default_pattern end sdesc << "-#{q}" short << q when /^=/ style = notwice(default_style.guess(arg = o), style, 'style') default_pattern, conv = search(:atype, Object) unless default_pattern else desc.push(o) end end default_pattern, conv = search(:atype, default_style.pattern) unless default_pattern if !(short.empty? and long.empty?) s = (style || default_style).new(pattern || default_pattern, conv, sdesc, ldesc, arg, desc, block) elsif !block raise ArgumentError, "no switch given" if style or pattern s = desc else short << pattern s = (style || default_style).new(pattern, conv, nil, nil, arg, desc, block) end return s, short, long, (not_style.new(not_pattern, not_conv, sdesc, ldesc, nil, desc, block) if not_style), nolong end def define(*opts, &block) top.append(*(sw = make_switch(opts, block))) sw[0] end # # Add option switch and handler. See #make_switch for an explanation of # parameters. # def on(*opts, &block) define(*opts, &block) self end alias def_option define def define_head(*opts, &block) top.prepend(*(sw = make_switch(opts, block))) sw[0] end # # Add option switch like with #on, but at head of summary. # def on_head(*opts, &block) define_head(*opts, &block) self end alias def_head_option define_head def define_tail(*opts, &block) base.append(*(sw = make_switch(opts, block))) sw[0] end # # Add option switch like with #on, but at tail of summary. # def on_tail(*opts, &block) define_tail(*opts, &block) self end alias def_tail_option define_tail # # Add separator in summary. # def separator(string) top.append(string, nil, nil) end # # Parses command line arguments +argv+ in order. When a block is given, # each non-option argument is yielded. # # Returns the rest of +argv+ left unparsed. # def order(*argv, &block) argv = argv[0].dup if argv.size == 1 and Array === argv[0] order!(argv, &block) end # # Same as #order, but removes switches destructively. # def order!(argv = default_argv, &nonopt) parse_in_order(argv, &nonopt) end def parse_in_order(argv = default_argv, setter = nil, &nonopt) # :nodoc: opt, arg, sw, val, rest = nil nonopt ||= proc {|arg| throw :terminate, arg} argv.unshift(arg) if arg = catch(:terminate) { while arg = argv.shift case arg # long option when /\A--([^=]*)(?:=(.*))?/nm opt, rest = $1, $2 begin sw, = complete(:long, opt, true) rescue ParseError raise $!.set_option(arg, true) end begin opt, cb, val = sw.parse(rest, argv) {|*exc| raise(*exc)} val = cb.call(val) if cb setter.call(sw.switch_name, val) if setter rescue ParseError raise $!.set_option(arg, rest) end # short option when /\A-(.)((=).*|.+)?/nm opt, has_arg, eq, val, rest = $1, $3, $3, $2, $2 begin sw, = search(:short, opt) unless sw begin sw, = complete(:short, opt) # short option matched. val = arg.sub(/\A-/, '') has_arg = true rescue InvalidOption # if no short options match, try completion with long # options. sw, = complete(:long, opt) eq ||= !rest end end rescue ParseError raise $!.set_option(arg, true) end begin opt, cb, val = sw.parse(val, argv) {|*exc| raise(*exc) if eq} raise InvalidOption, arg if has_arg and !eq and arg == "-#{opt}" argv.unshift(opt) if opt and (opt = opt.sub(/\A-*/, '-')) != '-' val = cb.call(val) if cb setter.call(sw.switch_name, val) if setter rescue ParseError raise $!.set_option(arg, arg.length > 2) end # non-option argument else catch(:prune) do visit(:each_option) do |sw| sw.block.call(arg) if Switch === sw and sw.match_nonswitch?(arg) end nonopt.call(arg) end end end nil } visit(:search, :short, nil) {|sw| sw.block.call(*argv) if !sw.pattern} argv end private :parse_in_order # # Parses command line arguments +argv+ in permutation mode and returns # list of non-option arguments. # def permute(*argv) argv = argv[0].dup if argv.size == 1 and Array === argv[0] permute!(argv) end # # Same as #permute, but removes switches destructively. # def permute!(argv = default_argv) nonopts = [] arg = nil order!(argv) {|arg| nonopts << arg} argv[0, 0] = nonopts argv end # # Parses command line arguments +argv+ in order when environment variable # POSIXLY_CORRECT is set, and in permutation mode otherwise. # def parse(*argv) argv = argv[0].dup if argv.size == 1 and Array === argv[0] parse!(argv) end # # Same as #parse, but removes switches destructively. # def parse!(argv = default_argv) if ENV.include?('POSIXLY_CORRECT') order!(argv) else permute!(argv) end end # # Wrapper method for getopts.rb. # # params = ARGV.getopts("ab:", "foo", "bar:") # # params[:a] = true # -a # # params[:b] = "1" # -b1 # # params[:foo] = "1" # --foo # # params[:bar] = "x" # --bar x # def getopts(*args) argv = Array === args.first ? args.shift : default_argv single_options, *long_options = *args result = {} single_options.scan(/(.)(:)?/) do |opt, val| if val result[opt] = nil define("-#{opt} VAL") else result[opt] = false define("-#{opt}") end end if single_options long_options.each do |arg| opt, val = arg.split(':', 2) if val result[opt] = val.empty? ? nil : val define("--#{opt} VAL") else result[opt] = false define("--#{opt}") end end parse_in_order(argv, result.method(:[]=)) result end # # See #getopts. # def self.getopts(*args) new.getopts(*args) end # # Traverses @stack, sending each element method +id+ with +args+ and # +block+. # def visit(id, *args, &block) el = nil @stack.reverse_each do |el| el.send(id, *args, &block) end nil end private :visit # # Searches +key+ in @stack for +id+ hash and returns or yields the result. # def search(id, key) block_given = block_given? visit(:search, id, key) do |k| return block_given ? yield(k) : k end end private :search # # Completes shortened long style option switch and returns pair of # canonical switch and switch descriptor OptionParser::Switch. # # +id+:: Searching table. # +opt+:: Searching key. # +icase+:: Search case insensitive if true. # +pat+:: Optional pattern for completion. # def complete(typ, opt, icase = false, *pat) if pat.empty? search(typ, opt) {|sw| return [sw, opt]} # exact match or... end raise AmbiguousOption, catch(:ambiguous) { visit(:complete, typ, opt, icase, *pat) {|opt, *sw| return sw} raise InvalidOption, opt } end private :complete # # Loads options from file names as +filename+. Does nothing when the file # is not present. Returns whether successfully loaded. # # +filename+ defaults to basename of the program without suffix in a # directory ~/.options. # def load(filename = nil) begin filename ||= File.expand_path(File.basename($0, '.*'), '~/.options') rescue return false end begin parse(*IO.readlines(filename).each {|s| s.chomp!}) true rescue Errno::ENOENT, Errno::ENOTDIR false end end # # Parses environment variable +env+ or its uppercase with splitting like a # shell. # # +env+ defaults to the basename of the program. # def environment(env = File.basename($0, '.*')) env = ENV[env] || ENV[env.upcase] or return require 'shellwords' parse(*Shellwords.shellwords(env)) end # # Acceptable argument classes # # # Any string and no conversion. This is fall-back. # accept(Object) {|s,|s or s.nil?} accept(NilClass) {|s,|s} # # Any non-empty string, and no conversion. # accept(String, /.+/nm) {|s,*|s} # # Ruby/C-like integer, octal for 0-7 sequence, binary for 0b, hexadecimal # for 0x, and decimal for others; with optional sign prefix. Converts to # Integer. # decimal = '\d+(?:_\d+)*' binary = 'b[01]+(?:_[01]+)*' hex = 'x[\da-f]+(?:_[\da-f]+)*' octal = "0(?:[0-7]*(?:_[0-7]+)*|#{binary}|#{hex})" integer = "#{octal}|#{decimal}" accept(Integer, %r"\A[-+]?(?:#{integer})"io) {|s,| Integer(s) if s} # # Float number format, and converts to Float. # float = "(?:#{decimal}(?:\\.(?:#{decimal})?)?|\\.#{decimal})(?:E[-+]?#{decimal})?" floatpat = %r"\A[-+]?#{float}"io accept(Float, floatpat) {|s,| s.to_f if s} # # Generic numeric format, converts to Integer for integer format, Float # for float format. # accept(Numeric, %r"\A[-+]?(?:#{octal}|#{float})"io) {|s,| eval(s) if s} # # Decimal integer format, to be converted to Integer. # DecimalInteger = /\A[-+]?#{decimal}/io accept(DecimalInteger) {|s,| s.to_i if s} # # Ruby/C like octal/hexadecimal/binary integer format, to be converted to # Integer. # OctalInteger = /\A[-+]?(?:[0-7]+(?:_[0-7]+)*|0(?:#{binary}|#{hex}))/io accept(OctalInteger) {|s,| s.oct if s} # # Decimal integer/float number format, to be converted to Integer for # integer format, Float for float format. # DecimalNumeric = floatpat # decimal integer is allowed as float also. accept(DecimalNumeric) {|s,| eval(s) if s} # # Boolean switch, which means whether it is present or not, whether it is # absent or not with prefix no-, or it takes an argument # yes/no/true/false/+/-. # yesno = CompletingHash.new %w[- no false].each {|el| yesno[el] = false} %w[+ yes true].each {|el| yesno[el] = true} yesno['nil'] = false # shoud be nil? accept(TrueClass, yesno) {|arg, val| val == nil or val} # # Similar to TrueClass, but defaults to false. # accept(FalseClass, yesno) {|arg, val| val != nil and val} # # List of strings separated by ",". # accept(Array) do |s,| if s s = s.split(',').collect {|s| s unless s.empty?} end s end # # Regular expression with options. # accept(Regexp, %r"\A/((?:\\.|[^\\])*)/([[:alpha:]]+)?\z|.*") do |all, s, o| f = 0 if o f |= Regexp::IGNORECASE if /i/ =~ o f |= Regexp::MULTILINE if /m/ =~ o f |= Regexp::EXTENDED if /x/ =~ o k = o.delete("^imx") end Regexp.new(s || all, f, k) end # # Exceptions # # # Base class of exceptions from OptionParser. # class ParseError < RuntimeError # Reason which caused the error. Reason = 'parse error'.freeze def initialize(*args) @args = args @reason = nil end attr_reader :args attr_writer :reason # # Pushes back erred argument(s) to +argv+. # def recover(argv) argv[0, 0] = @args argv end def set_option(opt, eq) if eq @args[0] = opt else @args.unshift(opt) end self end # # Returns error reason. Override this for I18N. # def reason @reason || self.class::Reason end def inspect "#<#{self.class.to_s}: #{args.join(' ')}>" end # # Default stringizing method to emit standard error message. # def message reason + ': ' + args.join(' ') end alias to_s message end # # Raises when ambiguously completable string is encountered. # class AmbiguousOption < ParseError const_set(:Reason, 'ambiguous option'.freeze) end # # Raises when there is an argument for a switch which takes no argument. # class NeedlessArgument < ParseError const_set(:Reason, 'needless argument'.freeze) end # # Raises when a switch with mandatory argument has no argument. # class MissingArgument < ParseError const_set(:Reason, 'missing argument'.freeze) end # # Raises when switch is undefined. # class InvalidOption < ParseError const_set(:Reason, 'invalid option'.freeze) end # # Raises when the given argument does not match required format. # class InvalidArgument < ParseError const_set(:Reason, 'invalid argument'.freeze) end # # Raises when the given argument word can't be completed uniquely. # class AmbiguousArgument < InvalidArgument const_set(:Reason, 'ambiguous argument'.freeze) end # # Miscellaneous # # # Extends command line arguments array (ARGV) to parse itself. # module Arguable # # Sets OptionParser object, when +opt+ is +false+ or +nil+, methods # OptionParser::Arguable#options and OptionParser::Arguable#options= are # undefined. Thus, there is no ways to access the OptionParser object # via the receiver object. # def options=(opt) unless @optparse = opt class << self undef_method(:options) undef_method(:options=) end end end # # Actual OptionParser object, automatically created if nonexistent. # # If called with a block, yields the OptionParser object and returns the # result of the block. If an OptionParser::ParseError exception occurs # in the block, it is rescued, a error message printed to STDERR and # +nil+ returned. # def options @optparse ||= OptionParser.new @optparse.default_argv = self block_given? or return @optparse begin yield @optparse rescue ParseError @optparse.warn $! nil end end # # Parses +self+ destructively in order and returns +self+ containing the # rest arguments left unparsed. # def order!(&blk) options.order!(self, &blk) end # # Parses +self+ destructively in permutation mode and returns +self+ # containing the rest arguments left unparsed. # def permute!() options.permute!(self) end # # Parses +self+ destructively and returns +self+ containing the # rest arguments left unparsed. # def parse!() options.parse!(self) end # # Substitution of getopts is possible as follows. Also see # OptionParser#getopts. # # def getopts(*args) # ($OPT = ARGV.getopts(*args)).each do |opt, val| # eval "$OPT_#{opt.gsub(/[^A-Za-z0-9_]/, '_')} = val" # end # rescue OptionParser::ParseError # end # def getopts(*args) options.getopts(self, *args) end # # Initializes instance variable. # def self.extend_object(obj) super obj.instance_eval {@optparse = nil} end def initialize(*args) super @optparse = nil end end # # Acceptable argument classes. Now contains DecimalInteger, OctalInteger # and DecimalNumeric. See Acceptable argument classes (in source code). # module Acceptables const_set(:DecimalInteger, OptionParser::DecimalInteger) const_set(:OctalInteger, OptionParser::OctalInteger) const_set(:DecimalNumeric, OptionParser::DecimalNumeric) end end # ARGV is arguable by OptionParser ARGV.extend(OptionParser::Arguable) if $0 == __FILE__ Version = OptionParser::Version ARGV.options {|q| q.parse!.empty? or puts "what's #{ARGV.join(' ')}?" } or abort(ARGV.options.to_s) end

SAVE CANCEL