RI(1) Ruby Programmers Reference Guide 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:
Use 'bs' (backspace) with most pager programs. To use ANSI, either disable the pager or tell the pager to allow control char-
acters.
-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.
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 (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>
UNIX
June 1, 2019 UNIX