NAME

       Log::Any::Adapter::Screen - Send logs to screen, with colors and some other features

VERSION

       This document describes version 0.140 of Log::Any::Adapter::Screen (from Perl distribution
       Log-Any-Adapter-Screen), released on 2018-12-22.

SYNOPSIS

        use Log::Any::Adapter;
        Log::Any::Adapter->set('Screen',
            # min_level => 'debug', # default is 'warning'
            # colors    => { trace => 'bold yellow on_gray', ... }, # customize colors
            # use_color => 1, # force color even when not interactive
            # stderr    => 0, # print to STDOUT instead of the default STDERR
            # formatter => sub { "LOG: $_[1]" }, # default none
        );

DESCRIPTION

       This Log::Any adapter prints log messages to screen (STDERR/STDOUT). The messages are
       colored according to level (unless coloring is turned off). It has a few other features:
       allow passing formatter, allow setting level from some environment variables, add
       prefix/timestamps.

       Parameters:

       •   min_level => STRING

           Set logging level. Default is warning. If LOG_LEVEL environment variable is set, it
           will be used instead. If TRACE environment variable is set to true, level will be set
           to 'trace'. If DEBUG environment variable is set to true, level will be set to
           'debug'. If VERBOSE environment variable is set to true, level will be set to
           'info'.If QUIET environment variable is set to true, level will be set to 'error'.

       •   use_color => BOOL

           Whether to use color or not. Default is true only when running interactively (-t
           STDOUT returns true).

       •   colors => HASH

           Customize colors. Hash keys are the logging methods, hash values are colors supported
           by Term::ANSIColor.

           The default colors are:

            method/level                 color
            ------------                 -----
            trace                        yellow
            debug                        (none, terminal default)
            info, notice                 green
            warning                      bold blue
            error                        magenta
            critical, alert, emergency   red

       •   stderr => BOOL

           Whether to print to STDERR, default is true. If set to 0, will print to STDOUT
           instead.

       •   formatter => CODEREF

           Allow formatting message. If defined, message will be passed before being colorized.
           Coderef will be passed:

            ($self, $message)

           and is expected to return the formatted message.

           The default formatter can optionally prefix the message with extra stuffs, depending
           on the content of LOG_PREFIX environment variable, such as: elapsed time (e.g.
           "[0.023ms]") if LOG_PREFIX is "elapsed".

           NOTE: Log::Any 1.00+ now has a proxy object which allows formatting/customization of
           message before it is sent to adapter(s), so formatting does not have to be done on a
           per-adapter basis. As an alternative to this attribute, you can also consider using
           the proxy object or the (upcoming?)  global proxy object.

       •   default_level => STR (default: warning)

           If no level-setting environment variables are defined, will default to this level.

ENVIRONMENT

   NO_COLOR
       If defined, will disable color. Consulted before "COLOR".

   COLOR
       Can be set to 0 to explicitly disable colors. The default is to check for "<-t STDOUT">.

   LOG_LEVEL => str
   QUIET => bool
   VERBOSE => bool
   DEBUG => bool
   TRACE => bool
       These environment variables can set the default for "min_level". See documentation about
       "min_level" for more details.

   LOG_PREFIX => str
       The default formatter groks these variables. See documentation about "formatter" about
       more details.

HOMEPAGE

       Please visit the project's homepage at
       <https://metacpan.org/release/Log-Any-Adapter-Screen>.

SOURCE

       Source repository is at
       <https://github.com/perlancar/perl-Log-Any-Adapter-ScreenColoredLevel>.

BUGS

       Please report any bugs or feature requests on the bugtracker website
       <https://rt.cpan.org/Public/Dist/Display.html?Name=Log-Any-Adapter-Screen>

       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.

SEE ALSO

       Originally inspired by Log::Log4perl::Appender::ScreenColoredLevel. The old name for this
       adapter is Log::Any::Adapter::ScreenColoredLevel but at some point I figure using a
       shorter name is better for my fingers.

       Log::Any

       Log::Log4perl::Appender::ScreenColoredLevel

       Term::ANSIColor

AUTHOR

       perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2018, 2016, 2015, 2014, 2012, 2011 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.