boxes - text mode box and comment drawing filter
boxes [-hlmrv] [-a format] [-d design] [-e eol] [-f file] [-i indent] [-k bool] [-n encoding] [-p pad] [-q query] [-s size] [-t tabopts] [infile [outfile]]
Boxes is a text filter which can draw any kind of box around its input text. Box design choices range from simple boxes to complex ASCII art. A box can also be removed and repaired, even if it has been badly damaged by editing of the text inside. Since boxes may be open on any side, boxes can also be used to create regional comments in any programming language. New box designs can be added and shared by appending to a configuration file.
a command line tool, but also integrates with any text
editor that supports filters. The boxes website has
examples on how to configure editor integration for various
by boxes are the following:
Alignment/positioning of text inside box. This option takes a format string argument which is read from left to right. The format string may not contain whitespace and must consist of one or more of the following components:
horizontal alignment of the input text block inside a
potentially larger box. Possible values for x are
l (ell, for left alignment), c (center), or
r (right). This does not affect the justification of
text lines within the input text block (use the j
vx - vertical alignment of the input text block inside a potentially larger box. Possible values for x are t (for top alignment), c (center), or b (bottom).
jx - justification of lines within the input text block. Possible values for x are l (ell, for left justification), c (center), or r (right). This does not affect the alignment of the input text block itself within the box. Use the h and v arguments for input text block positioning.
notations (can be combined with the above arguments):
l (ell) - short for
c - short for
r - short for
The factory default setting for -a is hlvt.
Command line design definition
for simple cases. The argument of this option is the
definition for the "west" (W) shape. The defined
shape must consist of exactly one line, i.e. no multi-line
shapes are allowed. The -c option is intended as a
shortcut for those cases where simple regional comments are
to be created, which only need a certain character or
sequence of characters to be placed in front of every line.
In such cases, it is much more convenient to simply specify
-c than to do a complete design definition in
one’s config file, where the only shape defined is the
This option implies a -d and does not access the config file. -c may of course be used in conjunction with any of the other options. By default, -c is not specified.
Design selection. The one argument of this option is the name of the design to use, which may either be a design’s primary name or any of its alias names.
Override line terminator. eol can be CR, LF, or CRLF. The default is to use the system-specific line terminator, which means CRLF on Windows, and LF otherwise. This option should only be used in an emergency, because normally the system-specific line terminator will be just fine. This option is considered experimental, and may go away in a future version of boxes. Let us know in https://github.com/ascii-boxes/boxes/issues/60 if you think we should keep it.
Use alternate config file. The one argument of this option is the name of a valid boxes config file. The argument of -f can also be a directory which contains a configuration file. More information on this topic below in the CONFIGURATION FILE section.
Print usage information.
Indentation mode. Possible arguments are text (indent text inside of box), box (indent box, not text inside of box), or none (throw away indentation). Arguments may be abbreviated. The default is box.
Kill leading/trailing blank lines on removal. The value of bool is either true or false. This option only takes effect in connection with -r. If set to true, leading and trailing blank lines will be removed from the output. If set to false, the entire content of the former box is returned. The default is false, if both the top and the bottom part of the box are open, as is the case with most regional comments. If the box’s design defines a top part or a bottom part, the default is true.
(ell) List designs. Produces a listing of all available box designs in the config file, along with a sample box and information about its creator. Also checks the syntax of the entire config file. If used together with -d, displays detailed information about the specified design.
Mend box. This removes a (potentially broken) box as with -r, and redraws it afterwards. The mended box is drawn according to the options given. This may be important to know when it comes to restoring padding, indentation, etc. for the mended box. Implies -k false.
Character encoding. Overrides the character encoding of the input and output text. Choose from the list shown by iconv -l. If an invalid character encoding is specified here, UTF-8 is used as a fallback. The default is to use the system encoding, which is normally the best course of action. So don’t specify this option unless you have to.
Padding. Specify padding in
spaces around the input text block for all sides of the box.
The argument string may not contain whitespace and must
consist of a combination of the following characters, each
followed by a number indicating the padding in spaces:
a - (all) give padding for all sides at once
h - (horiz) give padding for both horizontal sides
v - (vertical) give padding for both vertical sides
b - (bottom) give padding for bottom (south) side
l - (left) give padding for left (west) side
t - (top) give padding for top (north) side
r - (right) give padding for right (east) side
Example: -p a4t2 would define the padding to be 4 characters on all sides, except for the top of the box, where the input text block will be only 2 lines away from the box.
By default, unless specified otherwise in the config file, no padding is used.
Query designs by tag. In
contrast to -l, this will only print the matching
design names. This option is normally used stand-alone; if
used in combination with other options, behavior is
undefined. The query argument is a comma-separated
list of tags which can be present on a design in order to
match. A tag may optionally be prefixed with
order to require that it be present, or with
order to exclude designs which have that tag. Each tag can
only occur once per query.
This option is intended for use by scripts. Alias names are printed below their primary design name, and postfixed with
boxes -q programming,-comment
Remove an existing box. Which design to use is detected automatically. In order to save time or in case the detection does not decide correctly, combine with -d to specify the design. The default is to draw a new box.
Box size. This option specifies
the desired box size in units of columns (for width) and
lines (for height). If only a single number is given as
argument, this number specifies the desired box width. A
single number prefixed by ’x’ specifies only the
box height. The actual resulting box size may vary depending
on the individual shape sizes of the chosen design. Also,
other command line options may influence the box size (such
By default, the smallest possible box is created around the text.
Tab handling. This option
controls how tab characters in the input text are handled.
The option string must always begin with a uint
number indicating the distance between tab stops. It is
important that this value be set correctly, or tabulator
characters will upset your input text. The correct tab
distance value depends on the settings used for the text you
are processing. A common value is 8.
Immediately following the tab distance, an optional character can be appended, telling boxes how to treat the leading tabs. The following options are available:
e - expand tabs into spaces
k - keep tabs as close to what they were as possible
u - unexpand tabs. This makes boxes turn as many spaces as possible into tabs.
In order to
maintain backwards compatibility, the -t
string can be just a number. In that case, e
is assumed for tab handling, which removes all tabs and
replaces them with spaces. The factory default for the
-t option is simply 8, which is just such a case.
For example, you could specify -t 4u in order to have your leading tabs unexpanded. In the box content, tabs are always converted into spaces. The tab distance in this example is 4.
Print out current version number.
will look for the configuration file in several places, some
of which are given by the XDG specification.
1. -f option [file or dir]
When a configuration file is specified on the command line, we will use that. The -f option can also specify a directory. Any location specified via -f must exist, or boxes will terminate with an error.
2. BOXES environment variable [file or dir]
If no config file is specified on the command line, boxes will check for the BOXES environment variable, which may contain a filename or directory to use. Any location specified via the BOXES environment variable must exist, or boxes will terminate with an error.
3. $HOME [dir]
4. $XDG_CONFIG_HOME/boxes [dir]
5. $HOME/.config/boxes [dir]
6. /usr/share/boxes [file]
7. /etc/xdg/boxes [dir]
8. /usr/local/share/boxes [dir]
9. /usr/share/boxes [dir]
Either one of these last two directory locations might have the same name as the global config file from 6. That’s fine. It just means that we first look for a file of that name, and then for a directory containing the file.
environment variable XDG_CONFIG_DIRS is not
supported. However, its default value is supported via steps
8 and 9 above.
In the above list, whenever a step is designated with [dir], the
following file names will be found, in this order:
As soon as the first valid file is found, we use that and stop the search.
The recommended location for a user-specific configuration file is $HOME/.boxes or $HOME/.config/boxes/.boxes. A global configuration file should be located at /usr/share/boxes. But all of the other locations are fully supported, too.
The syntax of boxes config files is described on the website at /docs/config-syntax.html.
Examples on how
to invoke boxes may be found on the website at
echo "Good Bye World!" | boxes -d nuke
Boxes also combines nicely with other tools. Try
figlet "boxes . . . !" | lolcat -f | boxes -d unicornthink
was made by Thomas Jensen and the boxes contributors.
It has been lovingly maintained since 1999.
For a full list of contributors, see /contributing.html#contributors and https://github.com/ascii-boxes/boxes/graphs/contributors.
Please refer to the boxes website for the maintainer’s current email address.
This is boxes version 2.1.0.
boxes is free software under the terms of the GNU General Public License, version 2. Details in the LICENSE file: https://raw.githubusercontent.com/ascii-boxes/boxes/v2.1.0/LICENSE
Boxes recognizes the following environment variables:
figlet(6), iconv(1), lolcat(6)