Add markdownlint linter

example/config.edn

@@ -14,6 +14,8 @@
 
  :kubeval {:command-options ["--strict"]}
 
+ :markdownlint {:command-options ["-c" "/path/to/markdownlint.yaml"]}
+
  :stylelint {:command-options ["--config" "/path/to/stylelintrc.json"]}
 
  :tflint {:command-options ["-f" "json"]}

src/bosslint/linter/markdownlint.clj

@@ -0,0 +1,21 @@
+(ns bosslint.linter.markdownlint
+  (:require [bosslint.linter :as linter :refer [deflinter]]
+            [clojure.java.shell :as shell]
+            [clojure.string :as string]))
+
+(deflinter :linter/markdownlint
+  (name [] "markdownlint")
+
+  (files [file-group]
+    (linter/select-files file-group [:markdown]))
+
+  (lint [files conf]
+    (when (linter/check-command "markdownlint")
+      (let [args (concat ["markdownlint"]
+                         (:command-options conf)
+                         (map :absolute-path files))
+            ret (apply shell/sh args)]
+        (when-not (string/blank? (:out ret))
+          (println (string/trim-newline (:out ret))))
+        (when-not (string/blank? (:err ret))
+          (println (string/trim-newline (:err ret))))))))

src/bosslint/main.clj

@@ -2,8 +2,8 @@
   (:require [bosslint.config :as config]
             [bosslint.linter :as linter]
             (bosslint.linter checkstyle clj-kondo cljfmt dartanalyzer eastwood
-                             flake8 hadolint jsonlint kubeval stylelint
-                             swiftlint tflint yamllint)
+                             flake8 hadolint jsonlint kubeval markdownlint
+                             stylelint swiftlint tflint yamllint)
             [bosslint.util :as util]
             [clj-sub-command.core :as cmd]
             [clojure.java.shell :as shell]
@@ -52,6 +52,7 @@
     #"Dockerfile(\.[-\w]+)?$" :docker
     #"\.java$"                :java
     #"\.json$"                :json
+    #"\.(md|markdown)$"       :markdown
     #"\.py$"                  :python
     #"\.s[ac]ss$"             :sass
     #"\.swift$"               :swift