Using envvault with Clojure

Note: Please ensure that you have completed the previous steps

Prerequisites

Java Development Kit (JDK) installed
Leiningen (Clojure build tool) installed
envvault CLI tool installed
An existing Clojure project

Usage

Running Your Application

To run your Clojure application with environment variables from envvault:

$ envvault run --env=dev lein run

Caching Environment Variables

For better performance, you can cache your environment variables:

$ envvault run --env=dev -c -- lein run

Example Implementation

Here is how to set up a basic Clojure web server with envvault:

; src/my_app/core.clj
(ns my-app.core
  (:require [ring.adapter.jetty :as jetty]
            [compojure.core :refer :all]
            [compojure.route :as route]))

(defn get-env [key default]
  (or (System/getenv key) default))

; Your environment variables are automatically loaded
(def port (Integer/parseInt (get-env "PORT" "3000")))
(def db-url (get-env "DB_URL" ""))

(defroutes app-routes
  (GET "/" [] "Hello from envvault!")
  (route/not-found "Not Found"))

(defn -main [& args]
  (println (str "Server running at http://localhost:" port "/"))
  (jetty/run-jetty app-routes {:port port :join? false}))

; project.clj
(defproject my-app "0.1.0-SNAPSHOT"
  :description "My Clojure App"
  :dependencies [[org.clojure/clojure "1.11.1"]
                 [ring/ring-core "1.9.5"]
                 [ring/ring-jetty-adapter "1.9.5"]
                 [compojure "1.7.0"]]
  :main ^:skip-aot my-app.core
  :target-path "target/%s"
  :profiles {:uberjar {:aot :all
                       :jvm-opts ["-Dclojure.compiler.direct-linking=true"]}})