RI(1)()

NAME
ri - Ruby API reference front end

SYNOPSIS
ri [-Ti] [-d directory] [-f format] [--list-doc-dirs] [--no-standard-docs] [--[no-]{system|site|gems|home}] [--[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.

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 use ri '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.

SEE ALSO
ruby(1) rdoc(1) gem(1)

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 (https://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>