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Hot-loading dependencies

From time to time you’d want to experiment with some library without adding it as a dependency of your project. You can easily achieve this with tools.deps or pomegranate. Let’s start with a tools.deps example:

$ clj -Sdeps '{:deps {nrepl {:mvn/version "0.5.0"}
                      org.clojure/tools.deps.alpha {:git/url "https://github.com/clojure/tools.deps.alpha.git"
                                                    :sha "d492e97259c013ba401c5238842cd3445839d020"}}}' -m nrepl.cmdline --interactive
network-repl
Clojure 1.9.0
user=> (require '[clojure.tools.deps.alpha.repl :refer [add-lib]])
nil
user=> (add-lib 'org.clojure/core.memoize {:mvn/version "0.7.1"})
true
user=> (require 'clojure.core.memoize)
nil
user=>

Alternatively with pomegranate you can do the following:

$ clj -Sdeps '{:deps {nrepl {:mvn/version "0.5.0"} com.cemerick/pomegranate {:mvn/version "1.0.0"}}}' -m nrepl.cmdline --interactive
network-repl
Clojure 1.9.0
user=> (require '[cemerick.pomegranate :refer [add-dependencies]])
nil
user=> (add-dependencies :coordinates '[[org.clojure/core.memoize "0.7.1"]]
                         :repositories (merge cemerick.pomegranate.aether/maven-central
                                             {"clojars" "https://clojars.org/repo"}))
{[org.clojure/core.memoize "0.7.1"] #{[org.clojure/core.cache "0.7.1"] [org.clojure/clojure "1.6.0"]}, [org.clojure/core.cache "0.7.1"] #{[org.clojure/data.priority-map "0.0.7"]}, [org.clojure/data.priority-map "0.0.7"] nil, [org.clojure/clojure "1.6.0"] nil}
user=> (require 'clojure.core.memoize)
nil

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