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a Regexp, and suppress encoding option warnings. https://github.com/ruby/ruby/pull/82 git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@34316 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
1824 lines
48 KiB
Ruby
1824 lines
48 KiB
Ruby
#
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# optparse.rb - command-line option analysis with the OptionParser class.
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#
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# Author:: Nobu Nakada
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# Documentation:: Nobu Nakada and Gavin Sinclair.
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#
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# See OptionParser for documentation.
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#
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# == Developer Documentation (not for RDoc output)
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#
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# === Class tree
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#
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# - OptionParser:: front end
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# - OptionParser::Switch:: each switches
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# - OptionParser::List:: options list
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# - OptionParser::ParseError:: errors on parsing
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# - OptionParser::AmbiguousOption
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# - OptionParser::NeedlessArgument
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# - OptionParser::MissingArgument
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# - OptionParser::InvalidOption
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# - OptionParser::InvalidArgument
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# - OptionParser::AmbiguousArgument
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#
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# === Object relationship diagram
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#
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# +--------------+
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# | OptionParser |<>-----+
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# +--------------+ | +--------+
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# | ,-| Switch |
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# on_head -------->+---------------+ / +--------+
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# accept/reject -->| List |<|>-
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# | |<|>- +----------+
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# on ------------->+---------------+ `-| argument |
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# : : | class |
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# +---------------+ |==========|
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# on_tail -------->| | |pattern |
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# +---------------+ |----------|
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# OptionParser.accept ->| DefaultList | |converter |
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# reject |(shared between| +----------+
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# | all instances)|
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# +---------------+
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#
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# == OptionParser
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#
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# === Introduction
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#
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# OptionParser is a class for command-line option analysis. It is much more
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# advanced, yet also easier to use, than GetoptLong, and is a more Ruby-oriented
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# solution.
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#
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# === Features
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#
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# 1. The argument specification and the code to handle it are written in the
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# same place.
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# 2. It can output an option summary; you don't need to maintain this string
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# separately.
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# 3. Optional and mandatory arguments are specified very gracefully.
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# 4. Arguments can be automatically converted to a specified class.
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# 5. Arguments can be restricted to a certain set.
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#
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# All of these features are demonstrated in the examples below.
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#
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# === Minimal example
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#
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# require 'optparse'
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#
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# options = {}
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# OptionParser.new do |opts|
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# opts.banner = "Usage: example.rb [options]"
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#
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# opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
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# options[:verbose] = v
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# end
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# end.parse!
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#
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# p options
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# p ARGV
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#
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# === Complete example
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#
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# The following example is a complete Ruby program. You can run it and see the
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# effect of specifying various options. This is probably the best way to learn
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# the features of +optparse+.
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#
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# require 'optparse'
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# require 'optparse/time'
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# require 'ostruct'
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# require 'pp'
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#
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# class OptparseExample
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#
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# CODES = %w[iso-2022-jp shift_jis euc-jp utf8 binary]
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# CODE_ALIASES = { "jis" => "iso-2022-jp", "sjis" => "shift_jis" }
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#
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# #
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# # Return a structure describing the options.
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# #
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# def self.parse(args)
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# # The options specified on the command line will be collected in *options*.
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# # We set default values here.
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# options = OpenStruct.new
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# options.library = []
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# options.inplace = false
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# options.encoding = "utf8"
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# options.transfer_type = :auto
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# options.verbose = false
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#
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# opts = OptionParser.new do |opts|
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# opts.banner = "Usage: example.rb [options]"
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#
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# opts.separator ""
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# opts.separator "Specific options:"
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#
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# # Mandatory argument.
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# opts.on("-r", "--require LIBRARY",
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# "Require the LIBRARY before executing your script") do |lib|
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# options.library << lib
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# end
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#
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# # Optional argument; multi-line description.
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# opts.on("-i", "--inplace [EXTENSION]",
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# "Edit ARGV files in place",
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# " (make backup if EXTENSION supplied)") do |ext|
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# options.inplace = true
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# options.extension = ext || ''
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# options.extension.sub!(/\A\.?(?=.)/, ".") # Ensure extension begins with dot.
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# end
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#
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# # Cast 'delay' argument to a Float.
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# opts.on("--delay N", Float, "Delay N seconds before executing") do |n|
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# options.delay = n
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# end
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#
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# # Cast 'time' argument to a Time object.
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# opts.on("-t", "--time [TIME]", Time, "Begin execution at given time") do |time|
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# options.time = time
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# end
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#
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# # Cast to octal integer.
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# opts.on("-F", "--irs [OCTAL]", OptionParser::OctalInteger,
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# "Specify record separator (default \\0)") do |rs|
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# options.record_separator = rs
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# end
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#
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# # List of arguments.
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# opts.on("--list x,y,z", Array, "Example 'list' of arguments") do |list|
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# options.list = list
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# end
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#
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# # Keyword completion. We are specifying a specific set of arguments (CODES
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# # and CODE_ALIASES - notice the latter is a Hash), and the user may provide
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# # the shortest unambiguous text.
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# code_list = (CODE_ALIASES.keys + CODES).join(',')
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# opts.on("--code CODE", CODES, CODE_ALIASES, "Select encoding",
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# " (#{code_list})") do |encoding|
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# options.encoding = encoding
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# end
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#
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# # Optional argument with keyword completion.
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# opts.on("--type [TYPE]", [:text, :binary, :auto],
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# "Select transfer type (text, binary, auto)") do |t|
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# options.transfer_type = t
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# end
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#
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# # Boolean switch.
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# opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
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# options.verbose = v
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# end
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#
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# opts.separator ""
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# opts.separator "Common options:"
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#
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# # No argument, shows at tail. This will print an options summary.
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# # Try it and see!
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# opts.on_tail("-h", "--help", "Show this message") do
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# puts opts
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# exit
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# end
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#
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# # Another typical switch to print the version.
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# opts.on_tail("--version", "Show version") do
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# puts OptionParser::Version.join('.')
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# exit
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# end
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# end
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#
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# opts.parse!(args)
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# options
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# end # parse()
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#
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# end # class OptparseExample
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#
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# options = OptparseExample.parse(ARGV)
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# pp options
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#
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# === Further documentation
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#
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# The above examples should be enough to learn how to use this class. If you
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# have any questions, email me (gsinclair@soyabean.com.au) and I will update
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# this document.
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#
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class OptionParser
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# :stopdoc:
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RCSID = %w$Id$[1..-1].each {|s| s.freeze}.freeze
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Version = (RCSID[1].split('.').collect {|s| s.to_i}.extend(Comparable).freeze if RCSID[1])
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LastModified = (Time.gm(*RCSID[2, 2].join('-').scan(/\d+/).collect {|s| s.to_i}) if RCSID[2])
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Release = RCSID[2]
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NoArgument = [NO_ARGUMENT = :NONE, nil].freeze
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RequiredArgument = [REQUIRED_ARGUMENT = :REQUIRED, true].freeze
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OptionalArgument = [OPTIONAL_ARGUMENT = :OPTIONAL, false].freeze
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# :startdoc:
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#
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# Keyword completion module. This allows partial arguments to be specified
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# and resolved against a list of acceptable values.
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#
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module Completion
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def complete(key, icase = false, pat = nil)
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pat ||= Regexp.new('\A' + Regexp.quote(key).gsub(/\w+\b/, '\&\w*'),
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icase)
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canon, sw, cn = nil
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candidates = []
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each do |k, *v|
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(if Regexp === k
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kn = nil
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k === key
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else
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kn = defined?(k.id2name) ? k.id2name : k
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pat === kn
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end) or next
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v << k if v.empty?
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candidates << [k, v, kn]
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end
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candidates = candidates.sort_by {|k, v, kn| kn.size}
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if candidates.size == 1
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canon, sw, * = candidates[0]
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elsif candidates.size > 1
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canon, sw, cn = candidates.shift
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candidates.each do |k, v, kn|
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next if sw == v
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if String === cn and String === kn
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if cn.rindex(kn, 0)
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canon, sw, cn = k, v, kn
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next
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elsif kn.rindex(cn, 0)
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next
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end
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end
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throw :ambiguous, key
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end
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end
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if canon
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block_given? or return key, *sw
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yield(key, *sw)
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end
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end
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def convert(opt = nil, val = nil, *)
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val
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end
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end
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#
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# Map from option/keyword string to object with completion.
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#
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class OptionMap < Hash
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include Completion
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end
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#
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# Individual switch class. Not important to the user.
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#
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# Defined within Switch are several Switch-derived classes: NoArgument,
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# RequiredArgument, etc.
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#
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class Switch
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attr_reader :pattern, :conv, :short, :long, :arg, :desc, :block
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#
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# Guesses argument style from +arg+. Returns corresponding
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# OptionParser::Switch class (OptionalArgument, etc.).
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#
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def self.guess(arg)
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case arg
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when ""
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t = self
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when /\A=?\[/
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t = Switch::OptionalArgument
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when /\A\s+\[/
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t = Switch::PlacedArgument
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else
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t = Switch::RequiredArgument
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end
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self >= t or incompatible_argument_styles(arg, t)
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t
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end
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def self.incompatible_argument_styles(arg, t)
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raise(ArgumentError, "#{arg}: incompatible argument styles\n #{self}, #{t}",
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ParseError.filter_backtrace(caller(2)))
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end
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def self.pattern
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NilClass
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end
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def initialize(pattern = nil, conv = nil,
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short = nil, long = nil, arg = nil,
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desc = ([] if short or long), block = Proc.new)
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raise if Array === pattern
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@pattern, @conv, @short, @long, @arg, @desc, @block =
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pattern, conv, short, long, arg, desc, block
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end
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#
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# Parses +arg+ and returns rest of +arg+ and matched portion to the
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# argument pattern. Yields when the pattern doesn't match substring.
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#
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def parse_arg(arg)
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pattern or return nil, [arg]
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unless m = pattern.match(arg)
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yield(InvalidArgument, arg)
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return arg, []
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end
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if String === m
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m = [s = m]
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else
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m = m.to_a
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s = m[0]
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return nil, m unless String === s
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end
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raise InvalidArgument, arg unless arg.rindex(s, 0)
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return nil, m if s.length == arg.length
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yield(InvalidArgument, arg) # didn't match whole arg
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return arg[s.length..-1], m
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end
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private :parse_arg
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#
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# Parses argument, converts and returns +arg+, +block+ and result of
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# conversion. Yields at semi-error condition instead of raising an
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# exception.
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#
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def conv_arg(arg, val = [])
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if conv
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val = conv.call(*val)
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else
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val = proc {|v| v}.call(*val)
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end
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return arg, block, val
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end
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private :conv_arg
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#
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# Produces the summary text. Each line of the summary is yielded to the
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# block (without newline).
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#
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# +sdone+:: Already summarized short style options keyed hash.
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# +ldone+:: Already summarized long style options keyed hash.
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# +width+:: Width of left side (option part). In other words, the right
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# side (description part) starts after +width+ columns.
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# +max+:: Maximum width of left side -> the options are filled within
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# +max+ columns.
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# +indent+:: Prefix string indents all summarized lines.
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#
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def summarize(sdone = [], ldone = [], width = 1, max = width - 1, indent = "")
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sopts, lopts = [], [], nil
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@short.each {|s| sdone.fetch(s) {sopts << s}; sdone[s] = true} if @short
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@long.each {|s| ldone.fetch(s) {lopts << s}; ldone[s] = true} if @long
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return if sopts.empty? and lopts.empty? # completely hidden
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left = [sopts.join(', ')]
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right = desc.dup
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while s = lopts.shift
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l = left[-1].length + s.length
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l += arg.length if left.size == 1 && arg
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l < max or sopts.empty? or left << ''
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left[-1] << if left[-1].empty? then ' ' * 4 else ', ' end << s
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end
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if arg
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left[0] << (left[1] ? arg.sub(/\A(\[?)=/, '\1') + ',' : arg)
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end
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mlen = left.collect {|ss| ss.length}.max.to_i
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while mlen > width and l = left.shift
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mlen = left.collect {|ss| ss.length}.max.to_i if l.length == mlen
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if l.length < width and (r = right[0]) and !r.empty?
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l = l.to_s.ljust(width) + ' ' + r
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right.shift
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end
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yield(indent + l)
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end
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while begin l = left.shift; r = right.shift; l or r end
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l = l.to_s.ljust(width) + ' ' + r if r and !r.empty?
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yield(indent + l)
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end
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self
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end
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def add_banner(to) # :nodoc:
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unless @short or @long
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s = desc.join
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to << " [" + s + "]..." unless s.empty?
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end
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to
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end
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def match_nonswitch?(str) # :nodoc:
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@pattern =~ str unless @short or @long
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end
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#
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# Main name of the switch.
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#
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def switch_name
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(long.first || short.first).sub(/\A-+(?:\[no-\])?/, '')
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end
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#
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# Switch that takes no arguments.
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#
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class NoArgument < self
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#
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# Raises an exception if any arguments given.
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#
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def parse(arg, argv)
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yield(NeedlessArgument, arg) if arg
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conv_arg(arg)
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end
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def self.incompatible_argument_styles(*)
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end
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def self.pattern
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Object
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end
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end
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#
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# Switch that takes an argument.
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#
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class RequiredArgument < self
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#
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# Raises an exception if argument is not present.
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#
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def parse(arg, argv)
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unless arg
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raise MissingArgument if argv.empty?
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arg = argv.shift
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end
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conv_arg(*parse_arg(arg, &method(:raise)))
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end
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end
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#
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# Switch that can omit argument.
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#
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class OptionalArgument < self
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#
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# Parses argument if given, or uses default value.
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#
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def parse(arg, argv, &error)
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if arg
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conv_arg(*parse_arg(arg, &error))
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else
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conv_arg(arg)
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end
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end
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end
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#
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# Switch that takes an argument, which does not begin with '-'.
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#
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class PlacedArgument < self
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#
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# Returns nil if argument is not present or begins with '-'.
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#
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def parse(arg, argv, &error)
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if !(val = arg) and (argv.empty? or /\A-/ =~ (val = argv[0]))
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return nil, block, nil
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end
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opt = (val = parse_arg(val, &error))[1]
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val = conv_arg(*val)
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if opt and !arg
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argv.shift
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else
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val[0] = nil
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end
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val
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end
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end
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end
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|
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#
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# Simple option list providing mapping from short and/or long option
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# string to OptionParser::Switch and mapping from acceptable argument to
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# matching pattern and converter pair. Also provides summary feature.
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#
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class List
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# Map from acceptable argument types to pattern and converter pairs.
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attr_reader :atype
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# Map from short style option switches to actual switch objects.
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attr_reader :short
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# Map from long style option switches to actual switch objects.
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attr_reader :long
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# List of all switches and summary string.
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attr_reader :list
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#
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# Just initializes all instance variables.
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#
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def initialize
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@atype = {}
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@short = OptionMap.new
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@long = OptionMap.new
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@list = []
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end
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|
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#
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# See OptionParser.accept.
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#
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def accept(t, pat = /.*/m, &block)
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if pat
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pat.respond_to?(:match) or
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raise TypeError, "has no `match'", ParseError.filter_backtrace(caller(2))
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else
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pat = t if t.respond_to?(:match)
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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)
|
|
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)
|
|
*values = fetch(key) {
|
|
raise AmbiguousArgument, catch(:ambiguous) {return complete(key)}
|
|
}
|
|
return key, *values
|
|
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
|
|
raise(ArgumentError, "argument #{msg} given twice: #{obj}",
|
|
ParseError.filter_backtrace(caller(2)))
|
|
end
|
|
obj
|
|
end
|
|
private :notwice
|
|
|
|
SPLAT_PROC = proc {|*a| a.length <= 1 ? a.first : a}
|
|
#
|
|
# 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
|
|
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 || Symbol === o)) and o.respond_to?(:match)
|
|
pattern = notwice(o, pattern, 'pattern')
|
|
if pattern.respond_to?(:convert)
|
|
conv = pattern.method(:convert).to_proc
|
|
else
|
|
conv = SPLAT_PROC
|
|
end
|
|
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 {|pat, *v| pattern[pat] = v.fetch(0) {pat}}
|
|
when Module
|
|
raise ArgumentError, "unsupported argument type: #{o}", ParseError.filter_backtrace(caller(4))
|
|
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
|
|
if style or pattern
|
|
raise ArgumentError, "no switch given", ParseError.filter_backtrace(caller)
|
|
end
|
|
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, val, rest = nil
|
|
nonopt ||= proc {|a| throw :terminate, a}
|
|
argv.unshift(arg) if arg = catch(:terminate) {
|
|
while arg = argv.shift
|
|
case arg
|
|
# long option
|
|
when /\A--([^=]*)(?:=(.*))?/m
|
|
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-(.)((=).*|.+)?/m
|
|
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 (!rest or (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 |sw0|
|
|
sw = sw0
|
|
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 = []
|
|
order!(argv, &nonopts.method(:<<))
|
|
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)
|
|
@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) {|o, *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, /.+/m) {|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, and Rational for rational format.
|
|
#
|
|
real = "[-+]?(?:#{octal}|#{float})"
|
|
accept(Numeric, /\A(#{real})(?:\/(#{real}))?/io) {|s, d, n|
|
|
if n
|
|
Rational(d, n)
|
|
elsif s
|
|
eval(s)
|
|
end
|
|
}
|
|
|
|
#
|
|
# 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 # should 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 {|ss| ss unless ss.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")
|
|
k = nil if k.empty?
|
|
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 self.filter_backtrace(array)
|
|
unless $DEBUG
|
|
array.delete_if(&%r"\A#{Regexp.quote(__FILE__)}:"o.method(:=~))
|
|
end
|
|
array
|
|
end
|
|
|
|
def set_backtrace(array)
|
|
super(self.class.filter_backtrace(array))
|
|
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
|