Add vim example

doc/examples.md

@@ -307,3 +307,7 @@ META-INF/maven/borkdude/sci/pom.xml
 META-INF/leiningen/borkdude/sci/project.clj
 ...
 ```
+
+### Invoke vim inside a script
+
+See [examples/vim.clj](../examples/vim.clj).

examples/vim.clj

@@ -0,0 +1,17 @@
+#!/usr/bin/env bb
+(require '[clojure.java.io :as io])
+
+(defn vim [file]
+  (->
+   (ProcessBuilder. ["vim" file])
+   (.inheritIO)
+   (.start)
+   (.waitFor)))
+
+(def readme
+  (let [f (io/file "README.md")]
+    (when (not (.exists f))
+      (vim (.getPath f)))
+    (slurp f)))
+
+(println readme)