mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
b7528b5edb
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32115 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
1136 lines
26 KiB
Ruby
1136 lines
26 KiB
Ruby
require 'abbrev'
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require 'optparse'
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begin
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require 'readline'
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rescue LoadError
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end
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begin
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require 'win32console'
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rescue LoadError
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end
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require 'rdoc/ri'
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require 'rdoc/ri/paths'
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require 'rdoc/markup'
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require 'rdoc/markup/formatter'
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require 'rdoc/text'
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##
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# For RubyGems backwards compatibility
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require 'rdoc/ri/formatter'
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##
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# The RI driver implements the command-line ri tool.
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#
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# The driver supports:
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# * loading RI data from:
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# * Ruby's standard library
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# * RubyGems
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# * ~/.rdoc
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# * A user-supplied directory
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# * Paging output (uses RI_PAGER environment variable, PAGER environment
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# variable or the less, more and pager programs)
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# * Interactive mode with tab-completion
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# * Abbreviated names (ri Zl shows Zlib documentation)
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# * Colorized output
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# * Merging output from multiple RI data sources
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class RDoc::RI::Driver
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##
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# Base Driver error class
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class Error < RDoc::RI::Error; end
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##
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# Raised when a name isn't found in the ri data stores
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class NotFoundError < Error
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##
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# Name that wasn't found
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alias name message
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def message # :nodoc:
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"Nothing known about #{super}"
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end
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end
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##
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# An RDoc::RI::Store for each entry in the RI path
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attr_accessor :stores
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##
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# Controls the user of the pager vs $stdout
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attr_accessor :use_stdout
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##
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# Default options for ri
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def self.default_options
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options = {}
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options[:use_stdout] = !$stdout.tty?
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options[:width] = 72
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options[:interactive] = false
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options[:use_cache] = true
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options[:profile] = false
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# By default all standard paths are used.
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options[:use_system] = true
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options[:use_site] = true
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options[:use_home] = true
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options[:use_gems] = true
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options[:extra_doc_dirs] = []
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return options
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end
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##
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# Dump +data_path+ using pp
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def self.dump data_path
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require 'pp'
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open data_path, 'rb' do |io|
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pp Marshal.load(io.read)
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end
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end
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##
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# Parses +argv+ and returns a Hash of options
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def self.process_args argv
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options = default_options
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opts = OptionParser.new do |opt|
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opt.accept File do |file,|
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File.readable?(file) and not File.directory?(file) and file
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end
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opt.program_name = File.basename $0
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opt.version = RDoc::VERSION
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opt.release = nil
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opt.summary_indent = ' ' * 4
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opt.banner = <<-EOT
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Usage: #{opt.program_name} [options] [names...]
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Where name can be:
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Class | Class::method | Class#method | Class.method | method
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All class names may be abbreviated to their minimum unambiguous form. If a name
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is ambiguous, all valid options will be listed.
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A '.' matches either class or instance methods, while #method
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matches only instance and ::method matches only class methods.
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For example:
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#{opt.program_name} Fil
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#{opt.program_name} File
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#{opt.program_name} File.new
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#{opt.program_name} zip
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Note that shell quoting or escaping may be required for method names containing
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punctuation:
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#{opt.program_name} 'Array.[]'
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#{opt.program_name} compact\\!
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To see the default directories ri will search, run:
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#{opt.program_name} --list-doc-dirs
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Specifying the --system, --site, --home, --gems or --doc-dir options will
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limit ri to searching only the specified directories.
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Options may also be set in the 'RI' environment variable.
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EOT
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opt.separator nil
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opt.separator "Options:"
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opt.separator nil
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formatters = RDoc::Markup.constants.grep(/^To[A-Z][a-z]+$/).sort
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formatters = formatters.sort.map do |formatter|
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formatter.to_s.sub('To', '').downcase
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end
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opt.on("--format=NAME", "-f",
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"Uses the selected formatter. The default",
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"formatter is bs for paged output and ansi",
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"otherwise. Valid formatters are:",
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formatters.join(' '), formatters) do |value|
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options[:formatter] = RDoc::Markup.const_get "To#{value.capitalize}"
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end
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opt.separator nil
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opt.on("--no-pager", "-T",
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"Send output directly to stdout,",
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"rather than to a pager.") do
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options[:use_stdout] = true
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end
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opt.separator nil
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opt.on("--width=WIDTH", "-w", OptionParser::DecimalInteger,
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"Set the width of the output.") do |value|
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options[:width] = value
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end
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opt.separator nil
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opt.on("--interactive", "-i",
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"In interactive mode you can repeatedly",
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"look up methods with autocomplete.") do
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options[:interactive] = true
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end
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opt.separator nil
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opt.on("--list", "-l",
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"List classes ri knows about.") do
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options[:list] = true
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end
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opt.separator nil
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opt.on("--[no-]profile",
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"Run with the ruby profiler") do |value|
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options[:profile] = value
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end
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opt.separator nil
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opt.separator "Data source options:"
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opt.separator nil
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opt.on("--list-doc-dirs",
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"List the directories from which ri will",
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"source documentation on stdout and exit.") do
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options[:list_doc_dirs] = true
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end
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opt.separator nil
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opt.on("--doc-dir=DIRNAME", "-d", Array,
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"List of directories from which to source",
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"documentation in addition to the standard",
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"directories. May be repeated.") do |value|
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value.each do |dir|
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unless File.directory? dir then
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raise OptionParser::InvalidArgument, "#{dir} is not a directory"
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end
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options[:extra_doc_dirs] << File.expand_path(dir)
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end
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end
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opt.separator nil
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opt.on("--no-standard-docs",
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"Do not include documentation from",
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"the Ruby standard library, site_lib,",
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"installed gems, or ~/.rdoc.",
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"Use with --doc-dir") do
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options[:use_system] = false
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options[:use_site] = false
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options[:use_gems] = false
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options[:use_home] = false
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end
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opt.separator nil
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opt.on("--[no-]system",
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"Include documentation from Ruby's standard",
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"library. Defaults to true.") do |value|
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options[:use_system] = value
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end
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opt.separator nil
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opt.on("--[no-]site",
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"Include documentation from libraries",
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"installed in site_lib.",
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"Defaults to true.") do |value|
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options[:use_site] = value
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end
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opt.separator nil
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opt.on("--[no-]gems",
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"Include documentation from RubyGems.",
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"Defaults to true.") do |value|
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options[:use_gems] = value
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end
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opt.separator nil
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opt.on("--[no-]home",
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"Include documentation stored in ~/.rdoc.",
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"Defaults to true.") do |value|
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options[:use_home] = value
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end
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opt.separator nil
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opt.separator "Debug options:"
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opt.separator nil
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opt.on("--dump=CACHE", File,
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"Dumps data from an ri cache or data file") do |value|
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options[:dump_path] = value
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end
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end
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argv = ENV['RI'].to_s.split.concat argv
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opts.parse! argv
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options[:names] = argv
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options[:use_stdout] ||= !$stdout.tty?
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options[:use_stdout] ||= options[:interactive]
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options[:width] ||= 72
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options
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rescue OptionParser::InvalidArgument, OptionParser::InvalidOption => e
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puts opts
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puts
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puts e
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exit 1
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end
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##
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# Runs the ri command line executable using +argv+
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def self.run argv = ARGV
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options = process_args argv
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if options[:dump_path] then
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dump options[:dump_path]
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return
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end
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ri = new options
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ri.run
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end
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##
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# Creates a new driver using +initial_options+ from ::process_args
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def initialize initial_options = {}
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@paging = false
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@classes = nil
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options = self.class.default_options.update(initial_options)
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@formatter_klass = options[:formatter]
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require 'profile' if options[:profile]
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@names = options[:names]
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@list = options[:list]
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@doc_dirs = []
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@stores = []
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RDoc::RI::Paths.each(options[:use_system], options[:use_site],
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options[:use_home], options[:use_gems],
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*options[:extra_doc_dirs]) do |path, type|
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@doc_dirs << path
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store = RDoc::RI::Store.new path, type
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store.load_cache
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@stores << store
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end
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@list_doc_dirs = options[:list_doc_dirs]
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@interactive = options[:interactive]
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@use_stdout = options[:use_stdout]
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end
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##
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# Adds paths for undocumented classes +also_in+ to +out+
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def add_also_in out, also_in
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return if also_in.empty?
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out << RDoc::Markup::Rule.new(1)
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out << RDoc::Markup::Paragraph.new("Also found in:")
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paths = RDoc::Markup::Verbatim.new
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also_in.each do |store|
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paths.parts.push store.friendly_path, "\n"
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end
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out << paths
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end
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##
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# Adds a class header to +out+ for class +name+ which is described in
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# +classes+.
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def add_class out, name, classes
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heading = if classes.all? { |klass| klass.module? } then
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name
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else
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superclass = classes.map do |klass|
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klass.superclass unless klass.module?
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end.compact.shift || 'Object'
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"#{name} < #{superclass}"
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end
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out << RDoc::Markup::Heading.new(1, heading)
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out << RDoc::Markup::BlankLine.new
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end
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##
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# Adds "(from ...)" to +out+ for +store+
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def add_from out, store
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out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")
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end
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##
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# Adds +includes+ to +out+
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def add_includes out, includes
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return if includes.empty?
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out << RDoc::Markup::Rule.new(1)
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out << RDoc::Markup::Heading.new(1, "Includes:")
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includes.each do |modules, store|
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if modules.length == 1 then
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include = modules.first
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name = include.name
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path = store.friendly_path
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out << RDoc::Markup::Paragraph.new("#{name} (from #{path})")
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if include.comment then
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out << RDoc::Markup::BlankLine.new
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out << include.comment
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end
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else
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out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")
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wout, with = modules.partition { |incl| incl.comment.empty? }
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out << RDoc::Markup::BlankLine.new unless with.empty?
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with.each do |incl|
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out << RDoc::Markup::Paragraph.new(incl.name)
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out << RDoc::Markup::BlankLine.new
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out << incl.comment
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end
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unless wout.empty? then
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verb = RDoc::Markup::Verbatim.new
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wout.each do |incl|
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verb.push incl.name, "\n"
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end
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out << verb
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end
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end
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end
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end
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##
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# Adds a list of +methods+ to +out+ with a heading of +name+
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def add_method_list out, methods, name
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return unless methods
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out << RDoc::Markup::Heading.new(1, "#{name}:")
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out << RDoc::Markup::BlankLine.new
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if @use_stdout and !@interactive
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out.push(*methods.map do |method|
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RDoc::Markup::Verbatim.new method
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end)
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else
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out << RDoc::Markup::IndentedParagraph.new(2, methods.join(', '))
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end
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out << RDoc::Markup::BlankLine.new
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end
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##
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# Returns ancestor classes of +klass+
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def ancestors_of klass
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ancestors = []
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unexamined = [klass]
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seen = []
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loop do
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break if unexamined.empty?
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current = unexamined.shift
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seen << current
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stores = classes[current]
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break unless stores and not stores.empty?
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klasses = stores.map do |store|
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store.ancestors[current]
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end.flatten.uniq
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klasses = klasses - seen
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ancestors.push(*klasses)
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unexamined.push(*klasses)
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end
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ancestors.reverse
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end
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##
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# For RubyGems backwards compatibility
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def class_cache # :nodoc:
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end
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##
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# Hash mapping a known class or module to the stores it can be loaded from
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def classes
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return @classes if @classes
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@classes = {}
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@stores.each do |store|
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store.cache[:modules].each do |mod|
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# using default block causes searched-for modules to be added
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@classes[mod] ||= []
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@classes[mod] << store
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end
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end
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@classes
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end
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##
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# Completes +name+ based on the caches. For Readline
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def complete name
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klasses = classes.keys
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completions = []
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klass, selector, method = parse_name name
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# may need to include Foo when given Foo::
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klass_name = method ? name : klass
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if name !~ /#|\./ then
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completions = klasses.grep(/^#{Regexp.escape klass_name}[^:]*$/)
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completions.concat klasses.grep(/^#{Regexp.escape name}[^:]*$/) if
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name =~ /::$/
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completions << klass if classes.key? klass # to complete a method name
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elsif selector then
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completions << klass if classes.key? klass
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elsif classes.key? klass_name then
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completions << klass_name
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end
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if completions.include? klass and name =~ /#|\.|::/ then
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methods = list_methods_matching name
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|
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if not methods.empty? then
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# remove Foo if given Foo:: and a method was found
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completions.delete klass
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elsif selector then
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# replace Foo with Foo:: as given
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completions.delete klass
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completions << "#{klass}#{selector}"
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end
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completions.push(*methods)
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end
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|
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completions.sort.uniq
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end
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|
|
##
|
|
# Converts +document+ to text and writes it to the pager
|
|
|
|
def display document
|
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page do |io|
|
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text = document.accept formatter(io)
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|
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io.write text
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end
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end
|
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|
|
##
|
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# Outputs formatted RI data for class +name+. Groups undocumented classes
|
|
|
|
def display_class name
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return if name =~ /#|\./
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|
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klasses = []
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includes = []
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|
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found = @stores.map do |store|
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begin
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klass = store.load_class name
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klasses << klass
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includes << [klass.includes, store] if klass.includes
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[store, klass]
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rescue Errno::ENOENT
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end
|
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end.compact
|
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|
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return if found.empty?
|
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|
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also_in = []
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|
|
includes.reject! do |modules,| modules.empty? end
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|
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out = RDoc::Markup::Document.new
|
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|
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add_class out, name, klasses
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|
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add_includes out, includes
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|
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found.each do |store, klass|
|
|
comment = klass.comment
|
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class_methods = store.class_methods[klass.full_name]
|
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instance_methods = store.instance_methods[klass.full_name]
|
|
attributes = store.attributes[klass.full_name]
|
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|
|
if comment.empty? and !(instance_methods or class_methods) then
|
|
also_in << store
|
|
next
|
|
end
|
|
|
|
add_from out, store
|
|
|
|
unless comment.empty? then
|
|
out << RDoc::Markup::Rule.new(1)
|
|
out << comment
|
|
end
|
|
|
|
if class_methods or instance_methods or not klass.constants.empty? then
|
|
out << RDoc::Markup::Rule.new(1)
|
|
end
|
|
|
|
unless klass.constants.empty? then
|
|
out << RDoc::Markup::Heading.new(1, "Constants:")
|
|
out << RDoc::Markup::BlankLine.new
|
|
list = RDoc::Markup::List.new :NOTE
|
|
|
|
constants = klass.constants.sort_by { |constant| constant.name }
|
|
|
|
list.push(*constants.map do |constant|
|
|
parts = constant.comment.parts if constant.comment
|
|
parts << RDoc::Markup::Paragraph.new('[not documented]') if
|
|
parts.empty?
|
|
|
|
RDoc::Markup::ListItem.new(constant.name, *parts)
|
|
end)
|
|
|
|
out << list
|
|
end
|
|
|
|
add_method_list out, class_methods, 'Class methods'
|
|
add_method_list out, instance_methods, 'Instance methods'
|
|
add_method_list out, attributes, 'Attributes'
|
|
|
|
out << RDoc::Markup::BlankLine.new
|
|
end
|
|
|
|
add_also_in out, also_in
|
|
|
|
display out
|
|
end
|
|
|
|
##
|
|
# Outputs formatted RI data for method +name+
|
|
|
|
def display_method name
|
|
found = load_methods_matching name
|
|
|
|
raise NotFoundError, name if found.empty?
|
|
|
|
filtered = filter_methods found, name
|
|
|
|
out = RDoc::Markup::Document.new
|
|
|
|
out << RDoc::Markup::Heading.new(1, name)
|
|
out << RDoc::Markup::BlankLine.new
|
|
|
|
filtered.each do |store, methods|
|
|
methods.each do |method|
|
|
out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")
|
|
|
|
unless name =~ /^#{Regexp.escape method.parent_name}/ then
|
|
out << RDoc::Markup::Heading.new(3, "Implementation from #{method.parent_name}")
|
|
end
|
|
out << RDoc::Markup::Rule.new(1)
|
|
|
|
if method.arglists then
|
|
arglists = method.arglists.chomp.split "\n"
|
|
arglists = arglists.map { |line| line + "\n" }
|
|
out << RDoc::Markup::Verbatim.new(*arglists)
|
|
out << RDoc::Markup::Rule.new(1)
|
|
end
|
|
|
|
out << RDoc::Markup::BlankLine.new
|
|
out << method.comment
|
|
out << RDoc::Markup::BlankLine.new
|
|
end
|
|
end
|
|
|
|
display out
|
|
end
|
|
|
|
##
|
|
# Outputs formatted RI data for the class or method +name+.
|
|
#
|
|
# Returns true if +name+ was found, false if it was not an alternative could
|
|
# be guessed, raises an error if +name+ couldn't be guessed.
|
|
|
|
def display_name name
|
|
return true if display_class name
|
|
|
|
display_method name if name =~ /::|#|\./
|
|
|
|
true
|
|
rescue NotFoundError
|
|
matches = list_methods_matching name if name =~ /::|#|\./
|
|
matches = classes.keys.grep(/^#{name}/) if matches.empty?
|
|
|
|
raise if matches.empty?
|
|
|
|
page do |io|
|
|
io.puts "#{name} not found, maybe you meant:"
|
|
io.puts
|
|
io.puts matches.join("\n")
|
|
end
|
|
|
|
false
|
|
end
|
|
|
|
##
|
|
# Displays each name in +name+
|
|
|
|
def display_names names
|
|
names.each do |name|
|
|
name = expand_name name
|
|
|
|
display_name name
|
|
end
|
|
end
|
|
##
|
|
# Expands abbreviated klass +klass+ into a fully-qualified class. "Zl::Da"
|
|
# will be expanded to Zlib::DataError.
|
|
|
|
def expand_class klass
|
|
klass.split('::').inject '' do |expanded, klass_part|
|
|
expanded << '::' unless expanded.empty?
|
|
short = expanded << klass_part
|
|
|
|
subset = classes.keys.select do |klass_name|
|
|
klass_name =~ /^#{expanded}[^:]*$/
|
|
end
|
|
|
|
abbrevs = Abbrev.abbrev subset
|
|
|
|
expanded = abbrevs[short]
|
|
|
|
raise NotFoundError, short unless expanded
|
|
|
|
expanded.dup
|
|
end
|
|
end
|
|
|
|
##
|
|
# Expands the class portion of +name+ into a fully-qualified class. See
|
|
# #expand_class.
|
|
|
|
def expand_name name
|
|
klass, selector, method = parse_name name
|
|
|
|
return [selector, method].join if klass.empty?
|
|
|
|
"#{expand_class klass}#{selector}#{method}"
|
|
end
|
|
|
|
##
|
|
# Filters the methods in +found+ trying to find a match for +name+.
|
|
|
|
def filter_methods found, name
|
|
regexp = name_regexp name
|
|
|
|
filtered = found.find_all do |store, methods|
|
|
methods.any? { |method| method.full_name =~ regexp }
|
|
end
|
|
|
|
return filtered unless filtered.empty?
|
|
|
|
found
|
|
end
|
|
|
|
##
|
|
# Yields items matching +name+ including the store they were found in, the
|
|
# class being searched for, the class they were found in (an ancestor) the
|
|
# types of methods to look up (from #method_type), and the method name being
|
|
# searched for
|
|
|
|
def find_methods name
|
|
klass, selector, method = parse_name name
|
|
|
|
types = method_type selector
|
|
|
|
klasses = nil
|
|
ambiguous = klass.empty?
|
|
|
|
if ambiguous then
|
|
klasses = classes.keys
|
|
else
|
|
klasses = ancestors_of klass
|
|
klasses.unshift klass
|
|
end
|
|
|
|
methods = []
|
|
|
|
klasses.each do |ancestor|
|
|
ancestors = classes[ancestor]
|
|
|
|
next unless ancestors
|
|
|
|
klass = ancestor if ambiguous
|
|
|
|
ancestors.each do |store|
|
|
methods << [store, klass, ancestor, types, method]
|
|
end
|
|
end
|
|
|
|
methods = methods.sort_by do |_, k, a, _, m|
|
|
[k, a, m].compact
|
|
end
|
|
|
|
methods.each do |item|
|
|
yield(*item) # :yields: store, klass, ancestor, types, method
|
|
end
|
|
|
|
self
|
|
end
|
|
|
|
##
|
|
# Creates a new RDoc::Markup::Formatter. If a formatter is given with -f,
|
|
# use it. If we're outputting to a pager, use bs, otherwise ansi.
|
|
|
|
def formatter(io)
|
|
if @formatter_klass then
|
|
@formatter_klass.new
|
|
elsif paging? or !io.tty? then
|
|
RDoc::Markup::ToBs.new
|
|
else
|
|
RDoc::Markup::ToAnsi.new
|
|
end
|
|
end
|
|
|
|
##
|
|
# Runs ri interactively using Readline if it is available.
|
|
|
|
def interactive
|
|
puts "\nEnter the method name you want to look up."
|
|
|
|
if defined? Readline then
|
|
Readline.completion_proc = method :complete
|
|
puts "You can use tab to autocomplete."
|
|
end
|
|
|
|
puts "Enter a blank line to exit.\n\n"
|
|
|
|
loop do
|
|
name = if defined? Readline then
|
|
Readline.readline ">> "
|
|
else
|
|
print ">> "
|
|
$stdin.gets
|
|
end
|
|
|
|
return if name.nil? or name.empty?
|
|
|
|
name = expand_name name.strip
|
|
|
|
begin
|
|
display_name name
|
|
rescue NotFoundError => e
|
|
puts e.message
|
|
end
|
|
end
|
|
|
|
rescue Interrupt
|
|
exit
|
|
end
|
|
|
|
##
|
|
# Is +file+ in ENV['PATH']?
|
|
|
|
def in_path? file
|
|
return true if file =~ %r%\A/% and File.exist? file
|
|
|
|
ENV['PATH'].split(File::PATH_SEPARATOR).any? do |path|
|
|
File.exist? File.join(path, file)
|
|
end
|
|
end
|
|
|
|
##
|
|
# Lists classes known to ri starting with +names+. If +names+ is empty all
|
|
# known classes are shown.
|
|
|
|
def list_known_classes names = []
|
|
classes = []
|
|
|
|
stores.each do |store|
|
|
classes << store.modules
|
|
end
|
|
|
|
classes = classes.flatten.uniq.sort
|
|
|
|
unless names.empty? then
|
|
filter = Regexp.union names.map { |name| /^#{name}/ }
|
|
|
|
classes = classes.grep filter
|
|
end
|
|
|
|
page do |io|
|
|
if paging? or io.tty? then
|
|
if names.empty? then
|
|
io.puts "Classes and Modules known to ri:"
|
|
else
|
|
io.puts "Classes and Modules starting with #{names.join ', '}:"
|
|
end
|
|
io.puts
|
|
end
|
|
|
|
io.puts classes.join("\n")
|
|
end
|
|
end
|
|
|
|
##
|
|
# Returns an Array of methods matching +name+
|
|
|
|
def list_methods_matching name
|
|
found = []
|
|
|
|
find_methods name do |store, klass, ancestor, types, method|
|
|
if types == :instance or types == :both then
|
|
methods = store.instance_methods[ancestor]
|
|
|
|
if methods then
|
|
matches = methods.grep(/^#{Regexp.escape method.to_s}/)
|
|
|
|
matches = matches.map do |match|
|
|
"#{klass}##{match}"
|
|
end
|
|
|
|
found.push(*matches)
|
|
end
|
|
end
|
|
|
|
if types == :class or types == :both then
|
|
methods = store.class_methods[ancestor]
|
|
|
|
next unless methods
|
|
matches = methods.grep(/^#{Regexp.escape method.to_s}/)
|
|
|
|
matches = matches.map do |match|
|
|
"#{klass}::#{match}"
|
|
end
|
|
|
|
found.push(*matches)
|
|
end
|
|
end
|
|
|
|
found.uniq
|
|
end
|
|
|
|
##
|
|
# Loads RI data for method +name+ on +klass+ from +store+. +type+ and
|
|
# +cache+ indicate if it is a class or instance method.
|
|
|
|
def load_method store, cache, klass, type, name
|
|
methods = store.send(cache)[klass]
|
|
|
|
return unless methods
|
|
|
|
method = methods.find do |method_name|
|
|
method_name == name
|
|
end
|
|
|
|
return unless method
|
|
|
|
store.load_method klass, "#{type}#{method}"
|
|
end
|
|
|
|
##
|
|
# Returns an Array of RI data for methods matching +name+
|
|
|
|
def load_methods_matching name
|
|
found = []
|
|
|
|
find_methods name do |store, klass, ancestor, types, method|
|
|
methods = []
|
|
|
|
methods << load_method(store, :class_methods, ancestor, '::', method) if
|
|
[:class, :both].include? types
|
|
|
|
methods << load_method(store, :instance_methods, ancestor, '#', method) if
|
|
[:instance, :both].include? types
|
|
|
|
found << [store, methods.compact]
|
|
end
|
|
|
|
found.reject do |path, methods| methods.empty? end
|
|
end
|
|
|
|
##
|
|
# Returns the type of method (:both, :instance, :class) for +selector+
|
|
|
|
def method_type selector
|
|
case selector
|
|
when '.', nil then :both
|
|
when '#' then :instance
|
|
else :class
|
|
end
|
|
end
|
|
|
|
##
|
|
# Returns a regular expression for +name+ that will match an
|
|
# RDoc::AnyMethod's name.
|
|
|
|
def name_regexp name
|
|
klass, type, name = parse_name name
|
|
|
|
case type
|
|
when '#', '::' then
|
|
/^#{klass}#{type}#{Regexp.escape name}$/
|
|
else
|
|
/^#{klass}(#|::)#{Regexp.escape name}$/
|
|
end
|
|
end
|
|
|
|
##
|
|
# Paginates output through a pager program.
|
|
|
|
def page
|
|
if pager = setup_pager then
|
|
begin
|
|
yield pager
|
|
ensure
|
|
pager.close
|
|
end
|
|
else
|
|
yield $stdout
|
|
end
|
|
rescue Errno::EPIPE
|
|
ensure
|
|
@paging = false
|
|
end
|
|
|
|
##
|
|
# Are we using a pager?
|
|
|
|
def paging?
|
|
@paging
|
|
end
|
|
|
|
##
|
|
# Extracts the class, selector and method name parts from +name+ like
|
|
# Foo::Bar#baz.
|
|
#
|
|
# NOTE: Given Foo::Bar, Bar is considered a class even though it may be a
|
|
# method
|
|
|
|
def parse_name(name)
|
|
parts = name.split(/(::|#|\.)/)
|
|
|
|
if parts.length == 1 then
|
|
if parts.first =~ /^[a-z]/ then
|
|
type = '.'
|
|
meth = parts.pop
|
|
else
|
|
type = nil
|
|
meth = nil
|
|
end
|
|
elsif parts.length == 2 or parts.last =~ /::|#|\./ then
|
|
type = parts.pop
|
|
meth = nil
|
|
elsif parts[-2] != '::' or parts.last !~ /^[A-Z]/ then
|
|
meth = parts.pop
|
|
type = parts.pop
|
|
end
|
|
|
|
klass = parts.join
|
|
|
|
[klass, type, meth]
|
|
end
|
|
|
|
##
|
|
# Looks up and displays ri data according to the options given.
|
|
|
|
def run
|
|
if @list_doc_dirs then
|
|
puts @doc_dirs
|
|
elsif @list then
|
|
list_known_classes @names
|
|
elsif @interactive or @names.empty? then
|
|
interactive
|
|
else
|
|
display_names @names
|
|
end
|
|
rescue NotFoundError => e
|
|
abort e.message
|
|
end
|
|
|
|
##
|
|
# Sets up a pager program to pass output through. Tries the RI_PAGER and
|
|
# PAGER environment variables followed by pager, less then more.
|
|
|
|
def setup_pager
|
|
return if @use_stdout
|
|
|
|
pagers = [ENV['RI_PAGER'], ENV['PAGER'], 'pager', 'less', 'more']
|
|
|
|
pagers.compact.uniq.each do |pager|
|
|
next unless pager
|
|
|
|
pager_cmd = pager.split.first
|
|
|
|
next unless in_path? pager_cmd
|
|
|
|
io = IO.popen(pager, 'w') rescue next
|
|
|
|
next if $? and $?.exited? # pager didn't work
|
|
|
|
@paging = true
|
|
|
|
return io
|
|
end
|
|
|
|
@use_stdout = true
|
|
|
|
nil
|
|
end
|
|
|
|
end
|
|
|