#log #logger #simple #terminal #cli


A simple logger for your CLI apps or other things you want in the terminal

12 stable releases

✓ Uses Rust 2018 edition

new 1.3.1 Mar 23, 2020
1.3.0 Mar 22, 2020
1.1.0 Feb 28, 2020

#53 in Command-line interface

Download history 116/week @ 2020-02-24 52/week @ 2020-03-02 32/week @ 2020-03-09 40/week @ 2020-03-16

98 downloads per month


637 lines


Simple way to output beautiful text in your CLI applications. Only limit is your imagination.

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How to use

paris = "1.3"
use paris::Logger;

let mut log = Logger::new();

log.info("It's that simple!");
Optional features

If you'd like timestamps with all your logs you'll have to enable the feature when adding the crate as a dependency.

Notice: This will also include chrono as a dependency.

paris = { version = "1.3", features = ["timestamps"] }

Simple methods

// You can have icons at the start of your message!
log.info("Will add ℹ at the start");
log.error("Will add ✖ at the start");

See the Logger struct for all methods


All methods can be chained together to build more intricate log/message combinations, in hopes of minimizing the chaos that every log string becomes when you have to concatenate a bunch of strings and add tabs and newlines everywhere.

log.info("this is some info")
   .indent(4).warn("this is now indented by 4")
   .success("and this is 5 lines under all other messages");


Outputting text is cool. Outputting text with a colored icon at the start is even cooler! But this crate is all about customisation, about making the logs feel like home, if you will. Included in the crate are a variety of keys you can use to colorize your logs just the way you want them to be.

log.info("I can write normal text or use tags to <red>color it</>");
log.warn("Every function can contain <on green><black>tags</>");

log.info("If you don't write them <bleu>correctly</>, you just get an ugly looking tag");

There's a key for all colors supported by the terminal (white, black, red, blue, magenta, etc.) If you add the word on to any of those colors, it becomes the background color instead (on red, on blue, on green).

// How useful...
log.info("<on red> This has red background </>");

Maybe you'd like to use your terminals brighter colors, if that's the case you just have to add bright to your tag. Makes sense.

log.info("<blue><on bright red> This text is blue on a bright red background</> it's a pain");
Scroll down for a full list of keys if you're not feeling confident in your ability to name colors. It happens.


You've probably seen the </> tag in the above logs. It's not there to "close the previously opened tag" no no. You can open as many tags as you want and only use </> once, it's just the "reset everything to default" tag, You might decide you don't ever want to use it. It's up to you.

However, resetting everything to default might not be what you want. Most of the time it'll be enough, but for those times when it isn't there are a few other tags such as:

  • <///> only resets the background
  • <//> only reset the foreground

Color keys

To use a key just add the color name surrounded by <, > to your log string. Include spaces or use underlines(_) or dashes(-) instead if you wish.


black, red, green, yellow, blue, cyan, magenta, white


bright black, bright red, bright green, bright yellow, bright blue, bright cyan, bright magenta, bright white


on black, on red, on green, on yellow, on blue, on cyan, on magenta, on white


on bright black, on bright red, on bright green, on bright yellow, on bright blue, on bright cyan, on bright magenta, on bright white


bold(b), underline(u), dimmed(d), italic(i)

Styles are a bit different, they all have their usual keys, the long and painful to write ones. But they also have shorthand keys (in parenthesis).

And while they all may reset using one of the reset keys above, if you're looking to turn off a specific style you've opened, you can just use the exact same key but with a slash / in front of it.

Example: <bold> gets closed by </bold>


info, cross, warn, tick, heart