Class: OptionParser
- Inherits:
-
Object
- Object
- OptionParser
- Defined in:
- lib/optparse.rb
Overview
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
-
The argument specification and the code to handle it are written in the same place.
-
It can output an option summary; you don't need to maintain this string separately.
-
Optional and mandatory arguments are specified very gracefully.
-
Arguments can be automatically converted to a specified class.
-
Arguments can be restricted to a certain set.
All of these features are demonstrated in the examples below.
Minimal example
require 'optparse'
= {}
OptionParser.new do |opts|
opts. = "Usage: example.rb [options]"
opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
[:verbose] = v
end
end.parse!
p
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.
= OpenStruct.new
.library = []
.inplace = false
.encoding = "utf8"
.transfer_type = :auto
.verbose = false
opts = OptionParser.new do |opts|
opts. = "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|
.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|
.inplace = true
.extension = ext || ''
.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|
.delay = n
end
# Cast 'time' argument to a Time object.
opts.on("-t", "--time [TIME]", Time, "Begin execution at given time") do |time|
.time = time
end
# Cast to octal integer.
opts.on("-F", "--irs [OCTAL]", OptionParser::OctalInteger,
"Specify record separator (default \\0)") do |rs|
.record_separator = rs
end
# List of arguments.
opts.on("--list x,y,z", Array, "Example 'list' of arguments") do |list|
.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|
.encoding = encoding
end
# Optional argument with keyword completion.
opts.on("--type [TYPE]", [:text, :binary, :auto],
"Select transfer type (text, binary, auto)") do |t|
.transfer_type = t
end
# Boolean switch.
opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
.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)
end # parse()
end # class OptparseExample
= OptparseExample.parse(ARGV)
pp
Further documentation
The above examples should be enough to learn how to use this class. If you have any questions, email me ([email protected]) and I will update this document.
Defined Under Namespace
Modules: Acceptables, Arguable, Completion Classes: AmbiguousArgument, AmbiguousOption, CompletingHash, InvalidArgument, InvalidOption, List, MissingArgument, NeedlessArgument, OptionMap, ParseError, Switch
Constant Summary collapse
- RCSID =
:stopdoc:
%w$Id: optparse.rb 22467 2009-02-20 11:42:39Z 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
- ArgumentStyle =
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.
{}
- DefaultList =
Switches common used such as '--', and also provides default argument classes
List.new
- Officious =
Default options for ARGV, which never appear in option summary.
{}
- DecimalInteger =
Decimal integer format, to be converted to Integer.
/\A[-+]?#{decimal}/io
- OctalInteger =
Ruby/C like octal/hexadecimal/binary integer format, to be converted to Integer.
/\A[-+]?(?:[0-7]+(?:_[0-7]+)*|0(?:#{binary}|#{hex}))/io
- DecimalNumeric =
Decimal integer/float number format, to be converted to Integer for integer format, Float for float format.
floatpat
Instance Attribute Summary collapse
-
#banner ⇒ Object
Heading banner preceding summary.
-
#default_argv ⇒ Object
Strings to be parsed in default.
-
#program_name ⇒ Object
Program name to be emitted in error message and default banner, defaults to $0.
-
#release ⇒ Object
Release code.
-
#summary_indent ⇒ Object
Indentation for summary.
-
#summary_width ⇒ Object
Width for option list portion of summary.
-
#version ⇒ Object
Version.
Class Method Summary collapse
-
.accept(*args, &blk) ⇒ Object
See #accept.
- .each_const(path, klass = ::Object) ⇒ Object
-
.getopts(*args) ⇒ Object
See #getopts.
-
.inc(arg, default = nil) ⇒ Object
Returns an incremented value of
default
according toarg
. -
.reject(*args, &blk) ⇒ Object
See #reject.
- .search_const(klass, name) ⇒ Object
- .show_version(*pkg) ⇒ Object
- .terminate(arg = nil) ⇒ Object
- .top ⇒ Object
-
.with(*args, &block) ⇒ Object
Initializes a new instance and evaluates the optional block in context of the instance.
Instance Method Summary collapse
- #abort(mesg = $!) ⇒ Object
-
#accept(*args, &blk) ⇒ Object
Directs to accept specified class
t
. -
#add_officious ⇒ Object
:nodoc:.
-
#base ⇒ Object
Subject of #on_tail.
- #define(*opts, &block) ⇒ Object (also: #def_option)
- #define_head(*opts, &block) ⇒ Object (also: #def_head_option)
- #define_tail(*opts, &block) ⇒ Object (also: #def_tail_option)
-
#environment(env = File.basename($0, '.*')) ⇒ Object
Parses environment variable
env
or its uppercase with splitting like a shell. -
#getopts(*args) ⇒ Object
Wrapper method for getopts.rb.
-
#help ⇒ Object
(also: #to_s)
Returns option summary string.
- #inc(*args) ⇒ Object
-
#initialize(banner = nil, width = 32, indent = ' ' * 4) {|_self| ... } ⇒ OptionParser
constructor
Initializes the instance and yields itself if called with a block.
-
#load(filename = nil) ⇒ Object
Loads options from file names as
filename
. -
#make_switch(opts, block = nil) ⇒ Object
Creates an OptionParser::Switch from the parameters.
-
#new ⇒ Object
Pushes a new List.
-
#on(*opts, &block) ⇒ Object
Add option switch and handler.
-
#on_head(*opts, &block) ⇒ Object
Add option switch like with #on, but at head of summary.
-
#on_tail(*opts, &block) ⇒ Object
Add option switch like with #on, but at tail of summary.
-
#order(*argv, &block) ⇒ Object
Parses command line arguments
argv
in order. -
#order!(argv = default_argv, &nonopt) ⇒ Object
Same as #order, but removes switches destructively.
-
#parse(*argv) ⇒ Object
Parses command line arguments
argv
in order when environment variable POSIXLY_CORRECT is set, and in permutation mode otherwise. -
#parse!(argv = default_argv) ⇒ Object
Same as #parse, but removes switches destructively.
-
#permute(*argv) ⇒ Object
Parses command line arguments
argv
in permutation mode and returns list of non-option arguments. -
#permute!(argv = default_argv) ⇒ Object
Same as #permute, but removes switches destructively.
-
#reject(*args, &blk) ⇒ Object
Directs to reject specified class argument.
-
#remove ⇒ Object
Removes the last List.
-
#separator(string) ⇒ Object
Add separator in summary.
-
#summarize(to = [], width = @summary_width, max = width - 1, indent = @summary_indent, &blk) ⇒ Object
Puts option summary into
to
and returnsto
. -
#terminate(arg = nil) ⇒ Object
Terminates option parsing.
-
#to_a ⇒ Object
Returns option summary list.
-
#top ⇒ Object
Subject of #on / #on_head, #accept / #reject.
-
#ver ⇒ Object
Returns version string from program_name, version and release.
- #warn(mesg = $!) ⇒ Object
Constructor Details
#initialize(banner = nil, width = 32, indent = ' ' * 4) {|_self| ... } ⇒ OptionParser
Initializes the instance and yields itself if called with a block.
banner
-
Banner message.
width
-
Summary width.
indent
-
Summary indent.
781 782 783 784 785 786 787 788 789 790 |
# File 'lib/optparse.rb', line 781 def initialize( = nil, width = 32, indent = ' ' * 4) @stack = [DefaultList, List.new, List.new] @program_name = nil @banner = @summary_width = width @summary_indent = indent @default_argv = ARGV add_officious yield self if block_given? end |
Instance Attribute Details
#banner ⇒ Object
Heading banner preceding summary.
864 865 866 867 868 869 870 |
# File 'lib/optparse.rb', line 864 def unless @banner @banner = "Usage: #{program_name} [options]" visit(:add_banner, @banner) end @banner end |
#default_argv ⇒ Object
Strings to be parsed in default.
859 860 861 |
# File 'lib/optparse.rb', line 859 def default_argv @default_argv end |
#program_name ⇒ Object
Program name to be emitted in error message and default banner, defaults to $0.
876 877 878 |
# File 'lib/optparse.rb', line 876 def program_name @program_name || File.basename($0, '.*') end |
#release ⇒ Object
Release code
901 902 903 |
# File 'lib/optparse.rb', line 901 def release @release || (defined?(::Release) && ::Release) || (defined?(::RELEASE) && ::RELEASE) end |
#summary_indent ⇒ Object
Indentation for summary. Must be String (or have + String method).
856 857 858 |
# File 'lib/optparse.rb', line 856 def summary_indent @summary_indent end |
#summary_width ⇒ Object
Width for option list portion of summary. Must be Numeric.
853 854 855 |
# File 'lib/optparse.rb', line 853 def summary_width @summary_width end |
Class Method Details
.accept(*args, &blk) ⇒ Object
See #accept.
826 |
# File 'lib/optparse.rb', line 826 def self.accept(*args, &blk) top.accept(*args, &blk) end |
.each_const(path, klass = ::Object) ⇒ Object
49 50 51 52 53 54 55 56 57 |
# File 'lib/optparse/version.rb', line 49 def each_const(path, klass = ::Object) path.split(/::|\//).inject(klass) do |klass, name| raise NameError, path unless Module === klass klass.constants.grep(/#{name}/i) do |c| klass.const_defined?(c) or next c = klass.const_get(c) end end end |
.getopts(*args) ⇒ Object
See #getopts.
1405 1406 1407 |
# File 'lib/optparse.rb', line 1405 def self.getopts(*args) new.getopts(*args) end |
.inc(arg, default = nil) ⇒ Object
Returns an incremented value of default
according to arg
.
762 763 764 765 766 767 768 769 |
# File 'lib/optparse.rb', line 762 def self.inc(arg, default = nil) case arg when Integer arg.nonzero? when nil default.to_i + 1 end end |
.reject(*args, &blk) ⇒ Object
See #reject.
839 |
# File 'lib/optparse.rb', line 839 def self.reject(*args, &blk) top.reject(*args, &blk) end |
.search_const(klass, name) ⇒ Object
59 60 61 62 63 64 65 66 67 68 69 |
# File 'lib/optparse/version.rb', line 59 def search_const(klass, name) klasses = [klass] while klass = klasses.shift klass.constants.each do |cname| klass.const_defined?(cname) or next const = klass.const_get(cname) yield klass, cname, const if name === cname klasses << const if Module === const and const != ::Object end end end |
.show_version(*pkg) ⇒ Object
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 |
# File 'lib/optparse/version.rb', line 4 def show_version(*pkg) progname = ARGV..program_name result = false show = proc do |klass, cname, version| str = "#{progname}" unless klass == ::Object and cname == :VERSION version = version.join(".") if Array === version str << ": #{klass}" unless klass == Object str << " version #{version}" end [:Release, :RELEASE].find do |rel| if klass.const_defined?(rel) str << " (#{klass.const_get(rel)})" end end puts str result = true end if pkg.size == 1 and pkg[0] == "all" self.search_const(::Object, /\AV(?:ERSION|ersion)\z/) do |klass, cname, version| unless cname[1] == ?e and klass.const_defined?(:Version) show.call(klass, cname.intern, version) end end else pkg.each do |pkg| begin pkg = pkg.split(/::|\//).inject(::Object) {|m, c| m.const_get(c)} v = case when pkg.const_defined?(:Version) pkg.const_get(n = :Version) when pkg.const_defined?(:VERSION) pkg.const_get(n = :VERSION) else n = nil "unknown" end show.call(pkg, n, v) rescue NameError end end end result end |
.terminate(arg = nil) ⇒ Object
806 807 808 |
# File 'lib/optparse.rb', line 806 def self.terminate(arg = nil) throw :terminate, arg end |
.top ⇒ Object
811 |
# File 'lib/optparse.rb', line 811 def self.top() DefaultList end |
.with(*args, &block) ⇒ Object
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.
753 754 755 756 757 |
# File 'lib/optparse.rb', line 753 def self.with(*args, &block) opts = new(*args) opts.instance_eval(&block) opts end |
Instance Method Details
#abort(mesg = $!) ⇒ Object
920 921 922 |
# File 'lib/optparse.rb', line 920 def abort(mesg = $!) super("#{program_name}: #{mesg}") end |
#accept(*args, &blk) ⇒ Object
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)
822 |
# File 'lib/optparse.rb', line 822 def accept(*args, &blk) top.accept(*args, &blk) end |
#add_officious ⇒ Object
:nodoc:
792 793 794 795 796 797 |
# File 'lib/optparse.rb', line 792 def add_officious # :nodoc: list = base() Officious.each do |opt, block| list.long[opt] ||= block.call(self) end end |
#base ⇒ Object
Subject of #on_tail.
934 935 936 |
# File 'lib/optparse.rb', line 934 def base @stack[1] end |
#define(*opts, &block) ⇒ Object Also known as: def_option
1181 1182 1183 1184 |
# File 'lib/optparse.rb', line 1181 def define(*opts, &block) top.append(*(sw = make_switch(opts, block))) sw[0] end |
#define_head(*opts, &block) ⇒ Object Also known as: def_head_option
1196 1197 1198 1199 |
# File 'lib/optparse.rb', line 1196 def define_head(*opts, &block) top.prepend(*(sw = make_switch(opts, block))) sw[0] end |
#define_tail(*opts, &block) ⇒ Object Also known as: def_tail_option
1210 1211 1212 1213 |
# File 'lib/optparse.rb', line 1210 def define_tail(*opts, &block) base.append(*(sw = make_switch(opts, block))) sw[0] end |
#environment(env = File.basename($0, '.*')) ⇒ Object
Parses environment variable env
or its uppercase with splitting like a shell.
env
defaults to the basename of the program.
1480 1481 1482 1483 1484 |
# File 'lib/optparse.rb', line 1480 def environment(env = File.basename($0, '.*')) env = ENV[env] || ENV[env.upcase] or return require 'shellwords' parse(*Shellwords.shellwords(env)) end |
#getopts(*args) ⇒ Object
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
1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 |
# File 'lib/optparse.rb', line 1371 def getopts(*args) argv = Array === args.first ? args.shift : default_argv , * = *args result = {} .scan(/(.)(:)?/) do |opt, val| if val result[opt] = nil define("-#{opt} VAL") else result[opt] = false define("-#{opt}") end end if .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 |
#help ⇒ Object Also known as: to_s
Returns option summary string.
975 |
# File 'lib/optparse.rb', line 975 def help; summarize(.to_s.sub(/\n?\z/, "\n")) end |
#inc(*args) ⇒ Object
770 771 772 |
# File 'lib/optparse.rb', line 770 def inc(*args) self.class.inc(*args) end |
#load(filename = nil) ⇒ Object
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.
1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 |
# File 'lib/optparse.rb', line 1460 def load(filename = nil) begin filename ||= File.(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 |
#make_switch(opts, block = nil) ⇒ Object
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 regural expression):
"-[a-z]MANDATORY" "-[a-z][OPTIONAL]" "-[a-z]"
- Argument style and description:
-
Instead of specifying mandatory or optional orguments 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.
1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 |
# File 'lib/optparse.rb', line 1062 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 |
#new ⇒ Object
Pushes a new List.
941 942 943 944 945 946 947 948 |
# File 'lib/optparse.rb', line 941 def new @stack.push(List.new) if block_given? yield self else self end end |
#on(*opts, &block) ⇒ Object
Add option switch and handler. See #make_switch for an explanation of parameters.
1190 1191 1192 1193 |
# File 'lib/optparse.rb', line 1190 def on(*opts, &block) define(*opts, &block) self end |
#on_head(*opts, &block) ⇒ Object
Add option switch like with #on, but at head of summary.
1204 1205 1206 1207 |
# File 'lib/optparse.rb', line 1204 def on_head(*opts, &block) define_head(*opts, &block) self end |
#on_tail(*opts, &block) ⇒ Object
Add option switch like with #on, but at tail of summary.
1218 1219 1220 1221 |
# File 'lib/optparse.rb', line 1218 def on_tail(*opts, &block) define_tail(*opts, &block) self end |
#order(*argv, &block) ⇒ Object
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.
1237 1238 1239 1240 |
# File 'lib/optparse.rb', line 1237 def order(*argv, &block) argv = argv[0].dup if argv.size == 1 and Array === argv[0] order!(argv, &block) end |
#order!(argv = default_argv, &nonopt) ⇒ Object
Same as #order, but removes switches destructively.
1245 1246 1247 |
# File 'lib/optparse.rb', line 1245 def order!(argv = default_argv, &nonopt) parse_in_order(argv, &nonopt) end |
#parse(*argv) ⇒ Object
Parses command line arguments argv
in order when environment variable POSIXLY_CORRECT is set, and in permutation mode otherwise.
1346 1347 1348 1349 |
# File 'lib/optparse.rb', line 1346 def parse(*argv) argv = argv[0].dup if argv.size == 1 and Array === argv[0] parse!(argv) end |
#parse!(argv = default_argv) ⇒ Object
Same as #parse, but removes switches destructively.
1354 1355 1356 1357 1358 1359 1360 |
# File 'lib/optparse.rb', line 1354 def parse!(argv = default_argv) if ENV.include?('POSIXLY_CORRECT') order!(argv) else permute!(argv) end end |
#permute(*argv) ⇒ Object
Parses command line arguments argv
in permutation mode and returns list of non-option arguments.
1326 1327 1328 1329 |
# File 'lib/optparse.rb', line 1326 def permute(*argv) argv = argv[0].dup if argv.size == 1 and Array === argv[0] permute!(argv) end |
#permute!(argv = default_argv) ⇒ Object
Same as #permute, but removes switches destructively.
1334 1335 1336 1337 1338 1339 1340 |
# File 'lib/optparse.rb', line 1334 def permute!(argv = default_argv) nonopts = [] arg = nil order!(argv) {|arg| nonopts << arg} argv[0, 0] = nonopts argv end |
#reject(*args, &blk) ⇒ Object
Directs to reject specified class argument.
t
-
Argument class speficier, any object including Class.
reject(t)
835 |
# File 'lib/optparse.rb', line 835 def reject(*args, &blk) top.reject(*args, &blk) end |
#remove ⇒ Object
Removes the last List.
953 954 955 |
# File 'lib/optparse.rb', line 953 def remove @stack.pop end |
#separator(string) ⇒ Object
Add separator in summary.
1227 1228 1229 |
# File 'lib/optparse.rb', line 1227 def separator(string) top.append(string, nil, nil) end |
#summarize(to = [], width = @summary_width, max = width - 1, indent = @summary_indent, &blk) ⇒ Object
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.
966 967 968 969 970 |
# File 'lib/optparse.rb', line 966 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 |
#terminate(arg = nil) ⇒ Object
Terminates option parsing. Optional parameter arg
is a string pushed back to be the first non-option argument.
803 804 805 |
# File 'lib/optparse.rb', line 803 def terminate(arg = nil) self.class.terminate(arg) end |
#to_a ⇒ Object
Returns option summary list.
981 |
# File 'lib/optparse.rb', line 981 def to_a; summarize(.to_a.dup) end |
#top ⇒ Object
Subject of #on / #on_head, #accept / #reject
927 928 929 |
# File 'lib/optparse.rb', line 927 def top @stack[-1] end |
#ver ⇒ Object
Returns version string from program_name, version and release.
908 909 910 911 912 913 914 |
# File 'lib/optparse.rb', line 908 def ver if v = version str = "#{program_name} #{[v].join('.')}" str << " (#{v})" if v = release str end end |
#warn(mesg = $!) ⇒ Object
916 917 918 |
# File 'lib/optparse.rb', line 916 def warn(mesg = $!) super("#{program_name}: #{mesg}") end |