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-.\"Ruby is copyrighted by Yukihiro Matsumoto <matz@netlab.jp>.
-.Dd April 20, 2017
-.Dt RI \&1 "Ruby Programmer's Reference Guide"
-.Os UNIX
-.Sh NAME
-.Nm ri
-.Nd Ruby API reference front end
-.Sh SYNOPSIS
-.Nm
-.Op Fl ahilTv
-.Op Fl d Ar DIRNAME
-.Op Fl f Ar FORMAT
-.Op Fl w Ar WIDTH
-.Op Fl - Ns Oo Cm no- Oc Ns Cm pager
-.Op Fl -server Ns Oo = Ns Ar PORT Oc
-.Op Fl - Ns Oo Cm no- Oc Ns Cm list-doc-dirs
-.Op Fl -no-standard-docs
-.Op Fl - Ns Oo Cm no- Oc Ns Bro Cm system Ns | Ns Cm site Ns | Ns Cm gems Ns | Ns Cm home Brc
-.Op Fl - Ns Oo Cm no- Oc Ns Cm profile
-.Op Fl -dump Ns = Ns Ar CACHE
-.Op Ar name ...
-.Sh DESCRIPTION
-.Nm
-is a command-line front end for the Ruby API reference.
-You can search and read the API reference for classes and methods with
-.Nm .
-.Pp
-.Nm
-is a part of Ruby.
-.Pp
-.Ar name
-can be:
-.Bl -diag -offset indent
-.It Class | Module | Module::Class
-.Pp
-.It Class::method | Class#method | Class.method | method
-.Pp
-.It gem_name: | gem_name:README | gem_name:History
-.El
-.Pp
-All class names may be abbreviated to their minimum unambiguous form.
-If a name is ambiguous, all valid options will be listed.
-.Pp
-A
-.Ql \&.
-matches either class or instance methods, while #method
-matches only instance and ::method matches only class methods.
-.Pp
-README and other files may be displayed by prefixing them with the gem name
-they're contained in.  If the gem name is followed by a
-.Ql \&:
-all files in the gem will be shown.
-The file name extension may be omitted where it is unambiguous.
-.Pp
-For example:
-.Bd -literal -offset indent
-ri Fil
-ri File
-ri File.new
-ri zip
-ri rdoc:README
-.Ed
-.Pp
-Note that shell quoting or escaping may be required for method names
-containing punctuation:
-.Bd -literal -offset indent
-ri 'Array.[]'
-ri compact\e!
-.Ed
-.Pp
-To see the default directories
-.Nm
-will search, run:
-.Bd -literal -offset indent
-ri --list-doc-dirs
-.Ed
-.Pp
-Specifying the
-.Fl -system , Fl -site , Fl -home , Fl -gems ,
-or
-.Fl -doc-dir
-options will limit
-.Nm
-to searching only the specified directories.
-.Pp
-.Nm
-options may be set in the
-.Ev RI
-environment variable.
-.Pp
-The
-.Nm
-pager can be set with the
-.Ev RI_PAGER
-environment variable or the
-.Ev PAGER
-environment variable.
-.Pp
-.Sh OPTIONS
-.Bl -tag -width "1234567890123" -compact
-.Pp
-.It Fl i
-.It Fl - Ns Oo Cm no- Oc Ns Cm interactive
-In interactive mode you can repeatedly
-look up methods with autocomplete.
-.Pp
-.It Fl a
-.It Fl - Ns Oo Cm no- Oc Ns Cm all
-Show all documentation for a class or module.
-.Pp
-.It Fl l
-.It Fl - Ns Oo Cm no- Oc Ns Cm list
-List classes
-.Nm
-knows about.
-.Pp
-.It Fl - Ns Oo Cm no- Oc Ns Cm pager
-Send output to a pager,
-rather than directly to stdout.
-.Pp
-.It Fl T
-Synonym for
-.Fl -no-pager .
-.Pp
-.It Fl w Ar WIDTH
-.It Fl -width Ns = Ns Ar WIDTH
-Set the width of the output.
-.Pp
-.It Fl -server Ns Oo = Ns Ar PORT Oc
-Run RDoc server on the given port.
-The default port is\~8214.
-.Pp
-.It Fl f Ar FORMAT
-.It Fl -format Ns = Ns Ar FORMAT
-Use the selected formatter.
-The default formatter is
-.Li bs
-for paged output and
-.Li ansi
-otherwise.
-Valid formatters are:
-.Li ansi , Li bs , Li markdown , Li rdoc .
-.Pp
-.It Fl h
-.It Fl -help
-Show help and exit.
-.Pp
-.It Fl v
-.It Fl -version
-Output version information and exit.
-.El
-.Pp
-Data source options:
-.Bl -tag -width "1234567890123" -compact
-.Pp
-.It Fl - Ns Oo Cm no- Oc Ns Cm list-doc-dirs
-List the directories from which
-.Nm
-will source documentation on stdout and exit.
-.Pp
-.It Fl d Ar DIRNAME
-.It Fl -doc-dir Ns = Ns Ar DIRNAME
-List of directories from which to source
-documentation in addition to the standard
-directories.  May be repeated.
-.Pp
-.It Fl -no-standard-docs
-Do not include documentation from the Ruby standard library,
-.Pa site_lib ,
-installed gems, or
-.Pa ~/.rdoc .
-Use with
-.Fl -doc-dir .
-.Pp
-.It Fl - Ns Oo Cm no- Oc Ns Cm system
-Include documentation from Ruby's standard library.  Defaults to true.
-.Pp
-.It Fl - Ns Oo Cm no- Oc Ns Cm site
-Include documentation from libraries installed in
-.Pa site_lib .
-Defaults to true.
-.Pp
-.It Fl - Ns Oo Cm no- Oc Ns Cm gems
-Include documentation from RubyGems.  Defaults to true.
-.Pp
-.It Fl - Ns Oo Cm no- Oc Ns Cm home
-Include documentation stored in
-.Pa ~/.rdoc .
-Defaults to true.
-.El
-.Pp
-Debug options:
-.Bl -tag -width "1234567890123" -compact
-.Pp
-.It Fl - Ns Oo Cm no- Oc Ns Cm profile
-Run with the Ruby profiler.
-.Pp
-.It Fl -dump Ns = Ns Ar CACHE
-Dump data from an ri cache or data file.
-.El
-.Pp
-.Sh ENVIRONMENT
-.Bl -tag -width "USERPROFILE" -compact
-.Pp
-.It Ev RI
-Options to prepend to those specified on the command-line.
-.Pp
-.It Ev RI_PAGER
-.It Ev PAGER
-Pager program to use for displaying.
-.Pp
-.It Ev HOME
-.It Ev USERPROFILE
-.It Ev HOMEPATH
-Path to the user's home directory.
-.El
-.Pp
-.Sh FILES
-.Bl -tag -width "USERPROFILE" -compact
-.Pp
-.It Pa ~/.rdoc
-Path for ri data in the user's home directory.
-.Pp
-.El
-.Pp
-.Sh SEE ALSO
-.Xr ruby 1 ,
-.Xr rdoc 1 ,
-.Xr gem 1
-.Pp
-.Sh REPORTING BUGS
-.Bl -bullet
-.It
-Security vulnerabilities should be reported via an email to
-.Mt security@ruby-lang.org .
-Reported problems will be published after being fixed.
-.Pp
-.It
-Other bugs and feature requests can be reported via the
-Ruby Issue Tracking System
-.Pq Lk https://bugs.ruby-lang.org/ .
-Do not report security vulnerabilities
-via this system because it publishes the vulnerabilities immediately.
-.El
-.Sh AUTHORS
-Written by
-.An Dave Thomas Aq dave@pragmaticprogrammer.com .