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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 .

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