Current semantic version:

[clj-configurator "0.1.5"]

clj-configurator

A powerful yet simple Clojure configuration library.

Supports any configuration format (TOML, YAML, JSON, EDN, whatever) -- you just parse it yourself.
Supports environment variables and Java system properties.
Automatically figures out types based on defaults.

Usage

(ns your.app.config
  (:require [clj-toml.core :as toml]) ; <--- just for example
  (:use clj-configurator.core))

(defconfig settings
  :defaults {:database {:url "postgres://localhost:5432/app"
                        :max-connections 10}
             :log-level :WARN}
  :sources [env props
            (toml/parse-string (slurp "resources/config.toml"))
            ; add json, yaml, whatever parsing here
            ])

If you put the following into resources/config.toml:

[database]
url = "postgres://postgres.heroku.com/aaaaaaaaaaaa"

And set the following environment variables:

$ export LOG_LEVEL=INFO
$ export DATABASE_MAX_CONNECTIONS=20

This is what settings will be:

{:database {:url "postgres://postgres.heroku.com/aaaaaaaaaaaa"
            :max-connections 20}
 :log-level :INFO}

Isn't that awesome? It converted log-level to a keyword because that's what type was in the default. Same with max-connections (number).

License

Copyright © 2013 Greg V floatboth@me.com
This work is free. You can redistribute it and/or modify it under the
terms of the Do What The Fuck You Want To Public License, Version 2,
as published by Sam Hocevar. See the COPYING file for more details.