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<title> Dancer2::Logger::Console::Colored | PerlDancer Advent Calendar</title>
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<a href="/" class="homelink">Dancer Advent Calendar</a><br />
<p>
The PerlDancer Advent Calendar is a community-driven project that aims
to showcase the Dancer Perl web framework.
</p>
<p>
Each day of December until Christmas, one article about Dancer. Stay tuned for new moves!
</p>
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<h3>About Dancer</h3>
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<li><a href="http://www.perldancer.org/">Dancer homepage</a></li>
<li><a href="http://twitter.com/PerlDancer">Official Twitter</a></li>
<li><a href="http://github.com/PerlDancer/Dancer">Dancer on GitHub</a></li>
<li><a href="http://github.com/PerlDancer/Dancer2">Dancer 2 on GitHub</a></li>
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<div class="pod-document"><h1><a name="dancer2__logger__console__colored"></a>Dancer2::Logger::Console::Colored</h1>
<p>During development the console output of your app is often one of the most important tools.
But sometimes there is just too much noise, and changing the log settings all the time is not convenient.
Of course you can grep the log or scroll, but wouldn't it be nice to get visual clues for what you're looking for?</p>
<p>With <a href="https://metacpan.org/module/Dancer2::Logger::Console::Colored">Dancer2::Logger::Console::Colored</a> you can do that. It's a drop-in replacement for the default
console logger, but with color. It will make the message appear in color depending on the levels. You can turn
it on by setting your logger in your environment config file:</p>
<pre class="prettyprint">logger: "Console::Colored"</pre>
<p>Your log will instantly become cheerful and seasonal according to this default configuration:</p>
<pre class="prettyprint"># config.yml (these are the defaults)
engines:
logger:
Console::Colored:
colored_origin: "cyan"
colored_levels:
core: "bold bright_white"
debug: "bold bright_blue"
info: "bold green"
warning: "bold yellow"
error: "bold yellow on_red"
colored_messages:
core: "bold bright_white"
debug: "bold bright_blue"
info: "bold green"
warning: "bold yellow"
error: "bold yellow on_red"</pre>
<img src="/images/2018/23/log-1.png">
<p>The <code>colored_origin</code> refers to the part of the message that shows the package that this
message originated in, as well as the file name and line.</p>
<pre class="prettyprint">>> Dancer2 v0.207000 server 28764 listening on http://0.0.0.0:3000
[main:28764] debug @2018-12-19 20:31:06> Hello World in test.pl l. 6
^^^^ ^^^^^^^ ^</pre>
<p>The <code>colored_levels</code> are the log levels themselves.</p>
devdata/http_advent.perldancer.org_2018_23 view on Meta::CPAN
Console::Colored:
colored_regex:
- re: "customer number \d+"
color: "bold red"
- re: "\bhere\b"
color: "white on_green"</pre>
<p>If you want to highlight an entire log message in a specific color, you can set a pattern that captures
everything. However, this works on the message only, and not on the entire formatted line of log output.
(Patches welcome!)</p>
<pre class="prettyprint"># config.yml
engines:
logger:
Console::Colored:
colored_regex:
- re: ".+here.+"
color: "white on_red"</pre>
<img src="/images/2018/23/log-3.png">
<p>This opens up a lot of possibilities, for debugging as well as for general logging during development.</p>
<h2><a name="what_else"></a>What else?</h2>
<p>There are still some feature ideas in the backlog, but it's already pretty useful. If you would
like to see additional features, please feel free to
[open an issue on github](https://github.com/simbabque/Dancer2-Logger-Console-Colored/issues).</p>
<p>And if you happen to use Mojolicious as well and need something similar, take a look at
<a href="https://metacpan.org/module/Mojo::Log::Colored">Mojo::Log::Colored</a>, which is in the early stages of development, but works quite well.</p>
<h2><a name="author"></a>Author</h2>
<p>This article has been written by Julien Fiegehenn (simbabque) for the Perl Dancer
Advent Calendar 2018.</p>
<h2><a name="copyright"></a>Copyright</h2>
<p>No copyright retained. Enjoy.</p>
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