NAME

Log::ger::Output::Screen - Output log to screen

VERSION

version 0.019

SYNOPSIS

 use Log::ger::Output Screen => (
     # stderr      => 1,    # set to 0 to print to stdout instead of stderr
     # use_color   => 0,    # set to 1/0 to force usage of color, default is from NO_COLOR/COLOR or (-t STDOUT)
     # color_depth => 16,   # if unset will guess from heuristic
     # colorize_tags => 0,  # if set to true, will colorize "[...]" prefix in log message to unique colors
     # formatter   => sub { ... },
 );
 use Log::ger;

 log_warn "blah...";

DESCRIPTION

This Log::ger plugin outputs log messages as lines to screen (STDERR by default), coloring them according to the log messages' levels. There are different color schemes available, see Log::ger::Screen::ColorScheme::* modules like Log::ger::Screen::ColorScheme::Unlike.

CONFIGURATION

stderr

Bool, default 1. Whether to print to STDERR (the default) or STDOUT.

use_color

Bool. The default is to look at the NO_COLOR and COLOR environment variables, or 1 when in interactive mode and 0 when not in interactive mode.

color_depth

Integer, either 0, 16, 256, or 16777216. If unset, will use the following heuristic to guess color depth of terminal. First, if "use_color" is false then 0. Otherwise, check if COLORTERM environment variable is defined and has the value of truecolor; if yes then use 16777216. Otherwise, check if TERM environment variable contains the string 256color; if yes then 256. Otherwise 16.

colorize_tags

Bool, default false. Experimental. If set to true, will colorize "[...]" tag prefixes in log message with unique RGB color. Will only do this if color is enabled, obviously. This option is inspired by Dist::Zilla terminal output.

For example, if log message is something like one of the following:

 [pericmd][plugin Foo::Bar] skip foobar-ing the program because of qux
 my-prog: [pericmd] [plugin Foo::Bar] skip foobar-ing the program because of qux

Then the [pericmd] and [plugin Foo::Bar] will be given a unique RGB color each.

formatter

Coderef. When defined, will pass the formatted message (but being applied with colors) to this custom formatter.

ENVIRONMENT

COLOR_DEPTH

Will be used as a default for "color_depth" configuration.

NO_COLOR

Can be set (to anything) to disable color by default, if /use_color is not set. Consulted before "COLOR".

COLOR

Can be set to disable/enable color by default, if /use_color is not set.

HISTORY

Originally modelled after Log::Any::Adapter::Screen.

SEE ALSO

Log::ger

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2022, 2021, 2020, 2018, 2017 by perlancar <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 Log::ger::Output::Screen

perl -MCPAN -e shell
install Log::ger::Output::Screen