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Install Leiningen and create your first app


Clojure is a dynamic, general-purpose programming language, combining the approachability and interactive development of a scripting language with an efficient and robust infrastructure for multithreaded programming.


As these folks are saying on their website: If you come from the Java world, Leiningen could be thought of as “Maven meets Ant without the pain”. For Ruby and Python folks, Leiningen combines RubyGems/Bundler/Rake and pip/Fabric in a single tool.

Basically is a dependency management tool with built in capabilities to build the Clojure project and to generate Clojure apps from templates.

Install Leiningen

Ubuntu 19.04

sudo apt install leiningen


brew install leiningen

If you have a different distro or a different operating system, go to Leiningen’s instalation instructions and you should find instructions on how to do it.


Pedestal is a set of libraries that we use to build services and applications. It runs in the back end and can serve up whole HTML pages or handle API requests.

First Clojure project

Create a new web API from a template

lein new pedestal-service pedestal-api

Go to the new location and tell Leiningen to download and install all the dependencies for the project

cd pedestal-api
lein deps

Run the application using Leiningen

lein run

Navigate to http://localhost:8080 and you should get the very popular greeting “Hello world”.

Grab a drink to celebrate

Done, you have a running web API using Clojure, Pedestal and Leiningen.