unused var when linting babashka.process/$

[bn-darindouglass-zz]

version

v2021.08.06

platform

MacOS Catalina, native clj-kondo

editor

Emacs + flycheck

problem

clj-kondo incorrectly flags bindings used in the options map to $ as unused. This manifests several ways:

• unused bindings
• unused private vars

side note: the babashka.process repo still has deprecated kondo config for the $ macro

repro

;; foo.clj
(ns foo
  (:require [babashka.process :refer [$] :as p]))

(defn example
  []
  (let [env {"SOME_VAR" "wee"}]
    ;; unused binding env
    (-> ($ {:out :string :env env} echo "hi")
        (p/check)
        (:out)
        (println))))

config

{}

expected behavior

clj-kondo should recognize env as being used.