Slugger

This package provides a library and a protocol to create slugs for given strings.

By default, a slug will be containing only chars A-Za-z0-9 and the default seperator -.

Want to use this library with Ecto? Have a look at sobolevn/ecto_autoslug_field.

Installation

Add slugger to your list of dependencies in mix.exs:

def deps do
  [
    {:slugger, "~> 0.3"},
  ]
end

Configuration

The following options can be set in your config.exs and will be used at next compile!

# Char used as separator between words.
config :slugger, separator_char: ?-

# Path to the file containing replacements.
config :slugger, replacement_file: "lib/replacements.exs"

Library

Using the library is straightforward, check out a few examples:

iex(1)> Slugger.slugify " A b C "
"A-b-C"

iex(2)> Slugger.slugify_downcase " A b C "
"a-b-c"

iex(3)> Slugger.slugify "A cool title of a blog post"
"A-cool-title-of-a-blog-post"

iex(4)> Slugger.slugify_downcase("Kluski Śląskie @ Jalapeño Bilingüe")
"kluski-slaskie-at-jalapeno-bilinguee"

iex(5)> Slugger.slugify "Wikipedia Style", ?_
"Wikipedia_Style"

iex(6)> Slugger.truncate_slug "A-to-long-slug-that-should-be-truncated", 16
"A-to-long-slug"

Protocol

Next to the library, a protocol is provided to ease creating slugs for own data structures. By default, the protocol will try to run Slugger.slugify(Kernel.to_string(your_data)), so if your_data implements String.Chars, the returned string will be slugified. If you want to provide your own way to create a slug, check out the following example:

iex(10)> defmodule User do
...(10)>   defstruct name: "Julius Beckmann"
...(10)> end

iex(11)> defimpl Slugify, for: User do   
...(11)>   def slugify(user), do: Slugger.slugify(user.name)
...(11)> end

iex(12)> Slugify.slugify %User{}                          
"Julius-Beckmann"

Replacements

Special chars like äöüéáÁÉ will be replaced by rules given in the file lib/replacements.exs.

Copy that file if you need have own replacement rules, change the config value and recompile.