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NAME
SYNOPSIS
DESCRIPTION
OPTIONS
ENVIRONMENT
FILES
SEE ALSO
REPORTING BUGS
AUTHORS

NAME

ri − Ruby API reference front end

SYNOPSIS

ri [−Ti] [−d directory] [−f format] [−-list-doc-dirs] [−-no-standard-docs] [−-[no-]Bro system|site|gems|home Brc] [−-[no-]use-cache] [−-width=width] [target ...]

DESCRIPTION

ri is a CLI front end for the Ruby API reference. You can search and read API reference for classes and methods with .

ri is a part of Ruby.

target can be one of the following forms: It Class for classes It Class::method for class methods It Class#method for instance methods It Class.method for both class and instance methods It method for both class and instance methods

All class names may be abbreviated to their minimum unambiguous form. If a name is ambiguous, all valid options will be listed.

For example:

ri Fil
ri File
ri File.new
ri zip

Note that shell quoting may be required for method names containing punctuation:

ri ’Array.[]’
ri compact

OPTIONS

−-version

Prints the version of .

−T

−-no-pager

Send output directly to stdout, rather than to a pager.

−d directory
−-doc-dir=directory

List of directories from which to source documentation in addition to the standard directories. May be repeated.

−f FORMAT
−-fmt FORMAT
−-format=FORMAT

Format to use when displaying output:

ansi, bs, html, plain, simple

Use ’bs’ (backspace) with most pager programs. To use ANSI, either disable the pager or tell the pager to allow control characters.

−i

−-interactive

This makes ri go into interactive mode.

When ri is in interactive mode it will allow the user to disambiguate lists of methods in case multiple methods match against a method search string. It also will allow the user to enter in a method name (with auto-completion, if readline is supported) when viewing a class.

−-list-doc-dirs

List the directories from which ri will source documentation on stdout and exit.

−-no-standard-docs

Do not include documentation from the Ruby standard library, site_lib, installed gems, or ~/.rdoc.

Equivalent to specifying the options −-no-system,−-no-site,−-no-gems, and −-no-home.

−-[no-]system

Include documentation from Ruby’s standard library. Defaults to true.

−-[no-]site

Include documentation from libraries installed in site_lib. Defaults to true.

−-[no-]gems

Include documentation from RubyGems. Defaults to true.

−-[no-]home

Include documentation stored in ~/.rdoc. Defaults to true.

−-[no-]use-cache

Whether or not to use Ns

−w width
−-width=width

Set the width of the output.

ENVIRONMENT

	RI		Additional options.
	PAGER		Used as the name of pager program for displaying.
	HOME

USERPROFILE
HOMEPATH

Path to user’s home directory.

FILES

~/.ri

Caches recently referenced documents here.

~/.rdoc

Searches user-wide documents here.

REPORTING BUGS

Security vulnerabilities should be reported via an email to <security@ruby-lang.org> Reported problems will be published after being fixed.

And you can report other bugs and feature requests via the Ruby Issue Tracking System (http://bugs.ruby-lang.org). Do not report security vulnerabilities via the system because it publishes the vulnerabilities immediately.

AUTHORS

Written by Dave Thomas <dave@pragmaticprogrammer.com>

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