How to use clj-kondo to get all java imports in a clojure file

Question

I have use care where I have to process several clojure projects and find the imports of java libraries in each clojure namespace

I an invoking clj-kondo from my code for each .clj file as follows:

(def my-classpath
  ["/home/userxx/projects/clojure-dev/assetapi/libs/aws-java-sdk-sqs-1.12.120.jar"
   "/home/userxx/projects/clojure-dev/assetapi/libs/instaparse-1.4.8.jar"
   ;; ... all other JAR paths ...
   "/home/userxx/projects/clojure-dev/assetapi/libs/aws-java-sdk-cloudfront-1.12.120.jar"])

(def config
  {;; --- Top Level Keys ---

   :lint ["/home/userxx/projects/clojure-dev/assetapi/src/clojure/assetapi/handler.clj"]

   ;; Classpath at top-level
   :classpath my-classpath

   ;; Analysis flags under top-level :analysis
   :analysis {:java-class-usages true
              :java-class-definitions true
              :java-member-definitions true
             }

   ;; Output configuration at top-level
   :output {:analysis true ; Ensures analysis results are returned
            ;; :format :edn ; Optional: if you prefer edn output etc.
           }

   ;; The :config key is ONLY for merging external configs, if needed.
   ;; Do not put :output or :analysis under here for this purpose.

   })

;; Run clj-kondo programmatically
(def result (clj-kondo/run! config))

The classpath vector contains all the jars used in the clojure project that I am processing.

I know that the namespace I am passing in is using the java libraries and it including them in the namespace via (:import []) call in the source code and it also using it in source code. However, I am not seeing any java import or usages in the analysis that is returned

The analysis returns on these keys

 (:namespace-definitions :namespace-usages :var-definitions :var-usages)
enter code here

I expected to see java information in the analysis structure but I am not seeing it. I also do not see any java usage informaiton in (-> analysis :var-usages) . What do I need to fix ?

The issue is that I expect analysis to have data for java class imports as the clojure source is importing hava classes. I do not see any java import information . — user193116
– user193116, Commented Apr 3 at 21:30

Michiel Borkent · Accepted Answer · 2025-04-12 19:09:28Z

1

See this snippet:

(-> (with-in-str "(ns foo (:import [clojure.lang RT]))" (k/run! {:lint ["-"] :config {:analysis {:java-class-usages true}}})) :analysis :java-class-usages)

;;=> 

[{:end-row 1, :call nil, :lang :clj, :filename "<stdin>", :col 32, :class "clojure.lang.RT", :uri nil, :end-col 34, :import true, :row 1}]

So :java-class-usages returns the class reference with :import true indicating that it's an imported class.

Next time feel free to ask this question on Github Discussions in the clj-kondo repo or Clojurians Slack's clj-kondo channel for more visibility with clj-kondo users as well.

answered Apr 12 at 19:09

Michiel Borkent

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