A simple environment configuration library for Clojure.

Add the following dependency to your project.clj file:

1. Add a base config file.

   Create a new file at /resources/conf/base.edn. This will be the base configuration that's loaded every time your app runs. For example:

   {:foo "bar"
    :port 5000}

2. (Optional) Add environment-specific config files.

   If desired, you can set additional environment-specific config files for your app. Add additional files at /resources/conf/${ENV}.edn where $ENV is any string of your choosing. For example, following on the example above, if in production you'd like your app to run on port 80, you might create /resources/conf/prod.edn to look like this:

   {:port 80}

3. (Optional) Add late binding variables.

   Configuration variables can refer to other configuration variables using the #var syntax:

   {
     :database-url "sql://fake:1234/devdb"
     :bt-database-url #var :database-url
   }

4. Add code in your app to use your config values.

   For example:

   (require '[conf.core :as conf])
   
   (def foo (conf/get :foo))
   
   (defn -main [& args]
     (println "foo is" foo)
     (start-server {:port (conf/get :port)}))

5. Run your app.

   To use just the base config, run your app normally, e.g. lein run. If you'd like to enable an environment-specific config, be sure to pass the CONF_ENV environment variable, e.g. CONF_ENV=prod lein run.

Copyright © 2014-present Jim Brusstar, Standard Treasury

Distributed under the terms of the MIT License.