Editing Indent (Unix)

{{lowercase|title=indent}}
{{refimprove|date=April 2014}}
{{ infobox software
| name                   = indent
| logo                   = 
| caption                = 
| author                 = David Willcox
| released               = {{Start date and age|1976|11}}
| programming_language   = [[C (programming language)|C]]
| developer              = David Ingamells, Carlo Wood, Joseph Arceneaux, Jim Kingdon, John Bridges
| latest release version = {{wikidata|property|reference|P348}}
| latest release date    = {{start date and age|{{wikidata|qualifier|P348|P577}}}}
| latest_preview_version = 
| latest_preview_date    = 
| operating_system       = [[Cross-platform]]
| genre                  = source-code-reformat tool
| license                = GNU: [[GNU General Public License#Version 3|GPL-3.0-or-later]]<ref>{{cite web | author = GNU Savannah | title = GNU indent | url = https://savannah.gnu.org/projects/indent | quote = License: GNU General Public License v3 or later | access-date = 2023-10-30}}</ref>
| website                = GNU: {{URL|gnu.org/software/indent/}}
}}

'''indent''' is a [[Unix]] [[programming tool|utility]] that reformats [[C (programming language)|C]] and [[C++]] code in a user-defined [[indentation style]] and [[coding style]]. Support for C++ code is minimal.<ref>{{Cite web|url=http://www.gnu.org/software/indent/manual/indent.html#SEC15|title=indent: Indent and Format C Program Source|website=www.gnu.org|access-date=2019-08-16}}</ref>

The original version of indent was written by David Willcox at the [[University of Illinois]] in November 1976.  It was incorporated into [[BSD|4.1BSD]] in October 1982.<ref>{{cite web
 |url=https://invisible-island.net/cindent/cindent.html
 |title=CINDENT - C-language formatter
 |last=Dickey
 |first=Thomas
 |date=2017
 |website=Invisible Island
 |access-date=2019-04-22}}</ref>  GNU indent was first written by Jim Kingdon in 1989. The command is available as a separate package for [[Microsoft Windows]] as part of the [[UnxUtils]] collection of [[Native (computing)|native]] [[Windows API|Win32]] [[porting|ports]] of common GNU Unix-like utilities.<ref>{{Cite web|url=http://unxutils.sourceforge.net/|title=Native Win32 ports of some GNU utilities|website=unxutils.sourceforge.net}}</ref>

==Examples of usage==
The following [[command (computing)|command]]

<syntaxhighlight lang="sh">
$ indent -st -bap -bli0 -i4 -l79 -ncs -npcs -npsl -fca -lc79 -fc1 -ts4 some_file.c
</syntaxhighlight>
indents <code>some_file.c</code> in a style resembling [[Indent style#Allman style|BSD/Allman style]] and writes the result to the [[standard output]].

==GNU indent==
GNU indent is the [[GNU Project]]'s version of indent. A different indentation style, the [[Indentation style#GNU style|GNU style]], is used by default.<ref>[https://www.gnu.org/software/indent/manual/indent.pdf GNU Indent Manual]</ref>

==References==
{{reflist}}

==External links==
*[https://www.gnu.org/software/indent/ GNU indent Homepage]
*{{man|1|indent|OpenBSD}}
*[https://universalindent.sourceforge.net/ UniversalIndentGUI]
*[http://clang.llvm.org/docs/ClangFormat.html clang-format] (an alternative to indent)

{{GNU}}

[[Category:GNU Project software]]
[[Category:Unix programming tools]]


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