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RI(1)

Section: Misc. Reference Manual Pages ()
Updated: Ruby Programmers Reference Guide
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BSD mandoc
UNIX

NAME

ri - Ruby API reference front end

SYNOPSIS

[-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

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

is a part of Ruby.

target can be one of the following forms:

Class: for classes
Class::method: for class methods
Class#method: for instance methods
Class.method: for both class and instance methods
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 go into interactive mode.

When 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 's cache. True by default.

-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 Aq security@ruby-lang.org Ns . 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 Aq dave@pragmaticprogrammer.com