Add libraries to a project

Add library dependencies to specific project deps.edn files to make use of software that has already been developed. There are thousands of Clojure and ClojureScript libraries available via clojars.org.

Adding libraries as project dependencies

To use a namespace that is in a library which is not part of your project, that library should be included as a dependency.

{% tabs deps=”deps.edn projects”, lein=”Leiningnen projects” %}

{% content “deps” %} In the project deps.edn file:

  1. {:deps
  2.  {org.clojure/clojure        {:mvn/version "1.10.1"}
  3.   org.clojure/clojurescript  {:mv/version "1.10.520"}
  4.   com.stuartsierra/component {:mvn/version "1.0.0"}
  5.   compojure                  {:mvn/version "1.6.1"}
  6.   duct                       {:mvn/version "0.8.2"}
  7.   environ                    {:mvn/version "1.1.0"}}}

{% content “lein” %} In Leiningen:

  1. (defproject server-side-webapp "0.1.0-SNAPSHOT"
  2.   :dependencies [[org.clojure/clojure "1.10.1"]
  3.                  [org.clojure/clojurescript "1.10.520"]
  4.                  [com.stuartsierra/component "0.3.0"]
  5.                  [compojure "1.6.1"]
  6.                  [duct "0.8.2"]
  7.                  [environ "1.0.1"]])

{% endtabs %}

Excluding dependency depencencies

Libraries may also contain their own library depencencies. When several libraries are added as depencencies to a project, it is possible that the dependencies of included libraries conflict with each other.

Adding :exclude when adding a library as a dependency will prevent the specified libraries dependancy from being included.

TODO: dependency :excludes examples required