NAME

ruler - Print horizontal ruler on the terminal

VERSION

This document describes version 0.060 of ruler (from Perl distribution App-ruler), released on 2019-07-30.

SYNOPSIS

Usage:

% ruler [options]

Examples:

Default ruler (dash + number every 10 characters):

% ruler
.........|10.......|20.......|30.......|40.......|50.......|60.......|70.......|80.......|90.......|100......|110......|120......|130......|140......|150......|160......|170......|180......|19

White ruler with red marks and numbers:

% ruler --background-color 'black on_white' --major-tick-color 'red on_white' --minor-tick-character '' --number-color 'bold red on_white'
---------|10-------|20-------|30-------|40-------|50-------|60-------|70-------|80-------|90-------|100------|110------|120------|130------|140------|150------|160------|170------|180------|19

OPTIONS

* marks required options.

Main options

--background-color=s

--background-pattern=s, --bg

Default value:

"-"

--length=s, -l

--major-tick-character=s, -M

Default value:

"|"

--major-tick-color=s

--major-tick-every=s, -N

Default value:

10

--minor-tick-character=s, -m

Default value:

"."

--minor-tick-color=s

--minor-tick-every=s, -n

Default value:

1

--number-color=s

--number-every=s

Default value:

10

--number-format=s, -f

Default value:

"%d"

--number-start=s

Default value:

10

Configuration options

--config-path=s, -c

Set path to configuration file.

--config-profile=s, -P

Set configuration profile to use.

--no-config, -C

Do not use any configuration file.

Environment options

--no-env

Do not read environment for default options.

Other options

--help, -h, -?

Display help message and exit.

--version, -v

Display program's version and exit.

COMPLETION

This script has shell tab completion capability with support for several shells.

bash

To activate bash completion for this script, put:

complete -C ruler ruler

in your bash startup (e.g. ~/.bashrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.

It is recommended, however, that you install modules using cpanm-shcompgen which can activate shell completion for scripts immediately.

tcsh

To activate tcsh completion for this script, put:

complete ruler 'p/*/`ruler`/'

in your tcsh startup (e.g. ~/.tcshrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.

It is also recommended to install shcompgen (see above).

other shells

For fish and zsh, install shcompgen as described above.

CONFIGURATION FILE

This script can read configuration files. Configuration files are in the format of IOD, which is basically INI with some extra features.

By default, these names are searched for configuration filenames (can be changed using --config-path): ~/.config/ruler.conf, ~/ruler.conf, or /etc/ruler.conf.

All found files will be read and merged.

To disable searching for configuration files, pass --no-config.

You can put multiple profiles in a single file by using section names like [profile=SOMENAME] or [SOMESECTION profile=SOMENAME]. Those sections will only be read if you specify the matching --config-profile SOMENAME.

You can also put configuration for multiple programs inside a single file, and use filter program=NAME in section names, e.g. [program=NAME ...] or [SOMESECTION program=NAME]. The section will then only be used when the reading program matches.

Finally, you can filter a section by environment variable using the filter env=CONDITION in section names. For example if you only want a section to be read if a certain environment variable is true: [env=SOMEVAR ...] or [SOMESECTION env=SOMEVAR ...]. If you only want a section to be read when the value of an environment variable has value equals something: [env=HOSTNAME=blink ...] or [SOMESECTION env=HOSTNAME=blink ...]. If you only want a section to be read when the value of an environment variable does not equal something: [env=HOSTNAME!=blink ...] or [SOMESECTION env=HOSTNAME!=blink ...]. If you only want a section to be read when an environment variable contains something: [env=HOSTNAME*=server ...] or [SOMESECTION env=HOSTNAME*=server ...]. Note that currently due to simplistic parsing, there must not be any whitespace in the value being compared because it marks the beginning of a new section filter or section name.

List of available configuration parameters:

background_color (see --background-color)
background_pattern (see --background-pattern)
length (see --length)
major_tick_character (see --major-tick-character)
major_tick_color (see --major-tick-color)
major_tick_every (see --major-tick-every)
minor_tick_character (see --minor-tick-character)
minor_tick_color (see --minor-tick-color)
minor_tick_every (see --minor-tick-every)
number_color (see --number-color)
number_every (see --number-every)
number_format (see --number-format)
number_start (see --number-start)

ENVIRONMENT

RULER_OPT => str

Specify additional command-line options.

FILES

~/.config/ruler.conf

~/ruler.conf

/etc/ruler.conf

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/App-ruler.

SOURCE

Source repository is at https://github.com/perlancar/perl-App-ruler.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-ruler

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2019, 2016, 2015 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

cpanm App::ruler

perl -MCPAN -e shell
install App::ruler