Translate :clj-kondo config expressed in Leiningen project maps

Closes #8

README.md

@@ -9,7 +9,9 @@ A Leiningen plugin to run [clj-kondo](https://github.com/clj-kondo/clj-kondo).
 Running clj-kondo through Leiningen has some advantages, since it can compute for you things that would have to be specified by hand otherwise
 (and those things can be forgotten, outdated, etc).
 
-There's the tradeoff of startup speed, which might not be as critical in a CI environment as it is in your CLI.
+It also provides the ability to express clj-kondo options as Lein project map options, which can work nicely with Lein profiles, plugins, etc. 
+
+With using Leiningen, there's the tradeoff of startup speed, which might not be as critical in a CI environment as it is in your CLI.
 
 ## Installation
 
@@ -54,6 +56,20 @@ You can configure your project.clj to add custom aliases to run specific clj-kon
 ,,,
 ```
 
+## Config
+
+lein-clj-kondo understands clj-kondo config expressed as `:config` in a Leiningen project map. Example:
+
+```clj
+;; Enable a specific linter
+:clj-kondo {:config {:linters {:docstring-leading-trailing-whitespace {:level :warning}}}}
+```
+
+The traditional ways of specifying options of course keep working:
+
+* You can place a `.clj-kondo/config.edn` file in your project.
+* You can use the `--config ...` CLI option.
+
 ### Deploy
 
 `bb tag x.y.z` to tag the new release, github actions will do the deploy to clojars automatically.

src/leiningen/clj_kondo.clj

@@ -6,7 +6,9 @@
   (:import
    (java.io File)))
 
-(defn ^:private run-kondo! [{:keys [source-paths test-paths]} options]
+(defn ^:private run-kondo! [{:keys [source-paths test-paths]
+                             {:keys [config]} :clj-kondo}
+                            options]
   (let [args (or (not-empty options)
                  (when-let [v (->> [source-paths test-paths]
                                    (reduce into [])
@@ -15,6 +17,8 @@
                                    (not-empty))]
                    (apply lein-core/info "Linting" v)
                    (into ["--lint"] v)))
+        args (cond-> args
+               config (conj "--config" config))
         exit-status (apply kondo/main args)]
     (when-not (zero? exit-status)
       (lein-core/exit exit-status))))