Getting the version of the current clojure project in the repl - clojure

Question

Is it possible to grab the project information within the clojure repl?
For example, if there was a project defined:
(defproject blahproject "0.1.2" ....)
When running a repl in the project directory, is there a function like this?
> (project-version)
;=> 0.1.2

Answer 1

While you can parse project.clj yourself, this may be annoying. It's also a lot of work. Instead, you can just do:
(System/getProperty "projectname.version")

Answer 2

Leiningen project files are just Clojure data :)
(-> "/path/to/project.clj" slurp read-string (nth 2))

Answer 3

I use environ (https://github.com/weavejester/environ) which sucks in settings from a number of sources, including system properties. The project version appears as :<project-name>-version:
foobar.repl=> (require '[environ.core :refer [env]])
nil
foobar.repl=> (:foobar-version env)
"0.1.0-SNAPSHOT"

Answer 4

Add the below code to the end of project.clj:
(def project (assoc-in project [:repl-options :init]
`(~'def ~'project-version ~(project :version))))
Now you will have a var called project-version in the initial namespace for the repl.

Answer 5

As described in this discussion.
(ns myproject.example
(:require [clojure.java.io :as io])
(:import java.util.Properties))
(defn get-version [dep]
(let [path (str "META-INF/maven/" (or (namespace dep) (name dep))
"/" (name dep) "/pom.properties")
props (io/resource path)]
(when props
(with-open [stream (io/input-stream props)]
(let [props (doto (Properties.) (.load stream))]
(.getProperty props "version"))))))
(get-version 'myproject) ; => 0.1.0
(get-version 'org.clojure/clojure) ; => 1.3.0

Answer 6

As vemv said, Leiningen project files are just Clojure data. So, it's easy to access your project as an ordinary hash-map:
(->> "project.clj"
slurp
read-string
(drop 2)
(cons :version)
(apply hash-map)
(def project))
If you need this variable only in your repl, you can add it to repl-options to your project.clj:
(defproject yourproject "0.1.0"
:description ""
:url ""
:dependencies [ [org.clojure/clojure "1.4.0"]]
:repl-options { :init (->> "project.clj"
slurp
read-string
(drop 2)
(cons :version)
(apply hash-map)
(def project))})
Now, you have project variable in your repl. So, to access the version of your project you can simply type (:version project).
Of course, you can simply use native Leiningen code to parse you project file:
(defproject yourproject "0.1.0"
:description ""
:url ""
:dependencies [ [org.clojure/clojure "1.4.0"]
[leiningen-core "2.1.3"]]
:repl-options { :init (do (require 'leiningen.core.project)
(def project
(leiningen.core.project/read)))})
But, if you need only the version of your project and nothing more, then it's best to use Ankur's solution.

Answer 7

For a more fully-featured approach, you might want to take a look at the configleaf plugin for Leiningen (https://github.com/davidsantiago/configleaf). It will make the project map, with active profiles merged in, available to project code in a namespace of your choosing.

Answer 8

In case you need to do this from clojurescript you could create a macro (from another clj file) and call it from the cljs code :
;;ex: macro.clj
(defmacro get-project-version []
(System/getProperty "penelope.version"))
;;my_logic_code.cljs
(ns my-logic-code
(:require-macros [macros :as m]))
(def project-version (m/get-project-version))