move rmtree to anoia library

pkgs/anoia/fs.fnl

@@ -0,0 +1,20 @@
+(local lfs (require :lfs))
+
+(fn rmtree [pathname]
+  (case (lfs.symlinkattributes pathname)
+    nil true
+    {:mode "directory"}
+    (do
+      (each [f (lfs.dir pathname)]
+        (when (not (or (= f ".") (= f "..")))
+          (rmtree ( .. pathname "/" f)))
+        (lfs.rmdir pathname)))
+    {:mode "file"}
+    (os.remove pathname)
+    {:mode "link"}
+    (os.remove pathname)
+    unknown
+    (error (.. "can't remove " pathname " of kind \"" unknown.mode "\""))))
+
+
+{ : rmtree }

pkgs/odhcp-script/odhcp6-script.fnl

@@ -1,23 +1,6 @@
 (local { : split : merge : mkdir } (require :anoia))
 (local { : view } (require :fennel))
-(local lfs (require :lfs))
-
-(fn rmtree [pathname]
-  (case (lfs.symlinkattributes pathname)
-    nil true
-    {:mode "directory"}
-    (do
-      (each [f (lfs.dir pathname)]
-        (when (not (or (= f ".") (= f "..")))
-          (rmtree ( .. pathname "/" f)))
-        (lfs.rmdir pathname)))
-    {:mode "file"}
-    (os.remove pathname)
-    {:mode "link"}
-    (os.remove pathname)
-    unknown
-    (error (.. "can't remove " pathname " of kind \"" unknown.mode "\""))))
-
+(local { : rmtree } (require :anoia.fs))
 
 (local state-directory (assert (os.getenv "SERVICE_STATE")))
 (mkdir state-directory)