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Monthly Downloads: 7,401
Programming language: Elixir
License: MIT License
Tags: Utilities    
Latest version: v1.1.1

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README

Deppie

Deppie is a minimal deprecation logger for Elixir. The intent is to provide a very fast way to emit a deprecation message the first time a function is called. It's not meant to be fancy, it's just meant to work.

Why Deppie?

Ever written a library and had to deprecate a function? That's why.

It's a pain in a stateless language to keep track of when you have/haven't logged a warning, so Deppie removes that pain in an easy way, without impacting the application flow. The typical overhead of a Deppie.once/1 call is under a microsecond.

Originally this module was going to be named Deprecation, but that's pretty long to type ;)

Installation

Deppie is available on Hex, so add it as a dependency to your mix.exs:

def deps do
  [{:deppie, "~> 1.1"}]
end

Usage

It's super-duper easy to work with Deppie, as there are currently only two exposed functions; warn/1 and once/1.

# `Deppie.warn/1` just emits a basic deprecation notice
iex(1)> Deppie.warn("MyModule.my_function/1 is deprecated!")
12:48:14.037 [warn]  Deprecation Notice: MyModule.my_function/1 is deprecated!
:ok
# `Deppie.once/1` will only emit a message once during the life of an application
iex(2)> Deppie.once("MyModule.my_function/1 is deprecated!")
12:48:22.965 [warn]  Deprecation Notice: MyModule.my_function/1 is deprecated!
:ok
# Second time it's called, nothing happens!
iex(3)> Deppie.once("MyModule.my_function/1 is deprecated!")
:ok

If this library becomes popular, I might add bonus features like binary formatting - but for now the two functions above should be sufficient.