ri2.11

Usage

Overview

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

ri 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 ri.

-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 useri'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.