Current File : //proc/thread-self/root/opt/alt/ruby18/lib64/ruby/1.8/rdoc/ri/ri_options.rb
# We handle the parsing of options, and subsequently as a singleton
# object to be queried for option values
module RI
require 'rdoc/ri/ri_paths'
require 'rdoc/ri/ri_display'
VERSION_STRING = "ri v1.0.1 - 20041108"
class Options
require 'singleton'
require 'getoptlong'
include Singleton
# No not use a pager. Writable, because ri sets it if it
# can't find a pager
attr_accessor :use_stdout
# should we just display a class list and exit
attr_reader :list_classes
# should we display a list of all names
attr_reader :list_names
# The width of the output line
attr_reader :width
# the formatting we apply to the output
attr_reader :formatter
# the directory we search for original documentation
attr_reader :doc_dir
module OptionList
OPTION_LIST = [
[ "--help", "-h", nil,
"you're looking at it" ],
[ "--classes", "-c", nil,
"Display the names of classes and modules we\n" +
"know about"],
[ "--doc-dir", "-d", "<dirname>",
"A directory to search for documentation. If not\n" +
"specified, we search the standard rdoc/ri directories.\n" +
"May be repeated."],
[ "--system", nil, nil,
"Include documentation from Ruby's standard library:\n " +
RI::Paths::SYSDIR ],
[ "--site", nil, nil,
"Include documentation from libraries installed in site_lib:\n " +
RI::Paths::SITEDIR ],
[ "--home", nil, nil,
"Include documentation stored in ~/.rdoc:\n " +
(RI::Paths::HOMEDIR || "No ~/.rdoc found") ],
[ "--gems", nil, nil,
"Include documentation from RubyGems:\n" +
(RI::Paths::GEMDIRS ?
Gem.path.map { |dir| " #{dir}/doc/*/ri" }.join("\n") :
"No Rubygems ri found.") ],
[ "--format", "-f", "<name>",
"Format to use when displaying output:\n" +
" " + RI::TextFormatter.list + "\n" +
"Use 'bs' (backspace) with most pager programs.\n" +
"To use ANSI, either also use the -T option, or\n" +
"tell your pager to allow control characters\n" +
"(for example using the -R option to less)"],
[ "--list-names", "-l", nil,
"List all the names known to RDoc, one per line"
],
[ "--no-pager", "-T", nil,
"Send output directly to stdout."
],
[ "--width", "-w", "output width",
"Set the width of the output" ],
[ "--version", "-v", nil,
"Display the version of ri"
],
]
def OptionList.options
OPTION_LIST.map do |long, short, arg,|
option = []
option << long
option << short unless short.nil?
option << (arg ? GetoptLong::REQUIRED_ARGUMENT :
GetoptLong::NO_ARGUMENT)
option
end
end
def OptionList.strip_output(text)
text =~ /^\s+/
leading_spaces = $&
text.gsub!(/^#{leading_spaces}/, '')
$stdout.puts text
end
# Show an error and exit
def OptionList.error(msg)
$stderr.puts
$stderr.puts msg
name = File.basename $PROGRAM_NAME
$stderr.puts "\nFor help on options, try '#{name} --help'\n\n"
exit 1
end
# Show usage and exit
def OptionList.usage(short_form=false)
puts
puts(RI::VERSION_STRING)
puts
name = File.basename($0)
directories = [
RI::Paths::SYSDIR,
RI::Paths::SITEDIR,
RI::Paths::HOMEDIR
]
if RI::Paths::GEMDIRS then
Gem.path.each do |dir|
directories << "#{dir}/doc/*/ri"
end
end
directories = directories.join("\n ")
OptionList.strip_output(<<-EOT)
Usage:
#{name} [options] [names...]
Display information on Ruby classes, modules, and methods.
Give the names of classes or methods to see their documentation.
Partial names may be given: if the names match more than
one entity, a list will be shown, otherwise details on
that entity will be displayed.
Nested classes and modules can be specified using the normal
Name::Name notation, and instance methods can be distinguished
from class methods using "." (or "#") instead of "::".
For example:
#{name} File
#{name} File.new
#{name} F.n
#{name} zip
Note that shell quoting may be required for method names
containing punctuation:
#{name} 'Array.[]'
#{name} compact\\!
By default ri searches for documentation in the following
directories:
#{directories}
Specifying the --system, --site, --home, --gems or --doc-dir
options will limit ri to searching only the specified
directories.
EOT
if short_form
puts "For help on options, type '#{name} -h'"
puts "For a list of classes I know about, type '#{name} -c'"
else
puts "Options:\n\n"
OPTION_LIST.each do|long, short, arg, desc|
opt = ''
opt << (short ? sprintf("%15s", "#{long}, #{short}") :
sprintf("%15s", long))
if arg
opt << " " << arg
end
print opt
desc = desc.split("\n")
if opt.size < 17
print " "*(18-opt.size)
puts desc.shift
else
puts
end
desc.each do |line|
puts(" "*18 + line)
end
puts
end
puts "Options may also be passed in the 'RI' environment variable"
exit 0
end
end
end
# Show the version and exit
def show_version
puts VERSION_STRING
exit(0)
end
def initialize
@use_stdout = !STDOUT.tty?
@width = 72
@formatter = RI::TextFormatter.for("plain")
@list_classes = false
@list_names = false
# By default all paths are used. If any of these are true, only those
# directories are used.
@use_system = false
@use_site = false
@use_home = false
@use_gems = false
@doc_dirs = []
end
# Parse command line options.
def parse(args)
old_argv = ARGV.dup
ARGV.replace(args)
begin
go = GetoptLong.new(*OptionList.options)
go.quiet = true
go.each do |opt, arg|
case opt
when "--help" then OptionList.usage
when "--version" then show_version
when "--list-names" then @list_names = true
when "--no-pager" then @use_stdout = true
when "--classes" then @list_classes = true
when "--system" then @use_system = true
when "--site" then @use_site = true
when "--home" then @use_home = true
when "--gems" then @use_gems = true
when "--doc-dir"
if File.directory?(arg)
@doc_dirs << arg
else
$stderr.puts "Invalid directory: #{arg}"
exit 1
end
when "--format"
@formatter = RI::TextFormatter.for(arg)
unless @formatter
$stderr.print "Invalid formatter (should be one of "
$stderr.puts RI::TextFormatter.list + ")"
exit 1
end
when "--width"
begin
@width = Integer(arg)
rescue
$stderr.puts "Invalid width: '#{arg}'"
exit 1
end
end
end
rescue GetoptLong::InvalidOption, GetoptLong::MissingArgument => error
OptionList.error(error.message)
end
end
# Return the selected documentation directories.
def path
RI::Paths.path(@use_system, @use_site, @use_home, @use_gems, *@doc_dirs)
end
def raw_path
RI::Paths.raw_path(@use_system, @use_site, @use_home, @use_gems,
*@doc_dirs)
end
# Return an instance of the displayer (the thing that actually writes
# the information). This allows us to load in new displayer classes
# at runtime (for example to help with IDE integration)
def displayer
::RiDisplay.new(self)
end
end
end
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