diff --git a/src/main/scala/app/RepositoryViewerController.scala b/src/main/scala/app/RepositoryViewerController.scala
index 1498c25..f3d1105 100644
--- a/src/main/scala/app/RepositoryViewerController.scala
+++ b/src/main/scala/app/RepositoryViewerController.scala
@@ -126,19 +126,6 @@
     }
   })
 
-  // TODO Share this method with WikiService
-  private def processTree(git: Git, id: ObjectId)(f: (String, CanonicalTreeParser) => Unit) = {
-    using(new RevWalk(git.getRepository)){ revWalk =>
-      using(new TreeWalk(git.getRepository)){ treeWalk =>
-        val index = treeWalk.addTree(revWalk.parseTree(id))
-        treeWalk.setRecursive(true)
-        while(treeWalk.next){
-          f(treeWalk.getPathString, treeWalk.getTree(index, classOf[CanonicalTreeParser]))
-        }
-      }
-    }
-  }
-
   post("/:owner/:repository/edit/*", editorForm)(collaboratorsOnly { (form, repository) =>
     val (id, path) = splitPath(repository, multiParams("splat").head)
 
@@ -150,7 +137,7 @@
         val headName = s"refs/heads/${id}"
         val headTip  = git.getRepository.resolve(s"refs/heads/${id}")
 
-        processTree(git, headTip){ (treePath, tree) =>
+        JGitUtil.processTree(git, headTip){ (treePath, tree) =>
           if(treePath != path){
             builder.add(JGitUtil.createDirCacheEntry(treePath, tree.getEntryFileMode, tree.getEntryObjectId))
           }
diff --git a/src/main/scala/service/WikiService.scala b/src/main/scala/service/WikiService.scala
index 8c742e9..20fa764 100644
--- a/src/main/scala/service/WikiService.scala
+++ b/src/main/scala/service/WikiService.scala
@@ -175,17 +175,9 @@
             val inserter = git.getRepository.newObjectInserter()
             val headId   = git.getRepository.resolve(Constants.HEAD + "^{commit}")
 
-            using(new RevWalk(git.getRepository)){ revWalk =>
-              using(new TreeWalk(git.getRepository)){ treeWalk =>
-                val index = treeWalk.addTree(revWalk.parseTree(headId))
-                treeWalk.setRecursive(true)
-                while(treeWalk.next){
-                  val path = treeWalk.getPathString
-                  val tree = treeWalk.getTree(index, classOf[CanonicalTreeParser])
-                  if(revertInfo.find(x => x.filePath == path).isEmpty){
-                    builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
-                  }
-                }
+            JGitUtil.processTree(git, headId){ (path, tree) =>
+              if(revertInfo.find(x => x.filePath == path).isEmpty){
+                builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
               }
             }
 
@@ -226,22 +218,14 @@
         var removed  = false
 
         if(headId != null){
-          using(new RevWalk(git.getRepository)){ revWalk =>
-            using(new TreeWalk(git.getRepository)){ treeWalk =>
-              val index = treeWalk.addTree(revWalk.parseTree(headId))
-              treeWalk.setRecursive(true)
-              while(treeWalk.next){
-                val path = treeWalk.getPathString
-                val tree = treeWalk.getTree(index, classOf[CanonicalTreeParser])
-                if(path == currentPageName + ".md" && currentPageName != newPageName){
-                  removed = true
-                } else if(path != newPageName + ".md"){
-                  builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
-                } else {
-                  created = false
-                  updated = JGitUtil.getContentFromId(git, tree.getEntryObjectId, true).map(new String(_, "UTF-8") != content).getOrElse(false)
-                }
-              }
+          JGitUtil.processTree(git, headId){ (path, tree) =>
+            if(path == currentPageName + ".md" && currentPageName != newPageName){
+              removed = true
+            } else if(path != newPageName + ".md"){
+              builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
+            } else {
+              created = false
+              updated = JGitUtil.getContentFromId(git, tree.getEntryObjectId, true).map(new String(_, "UTF-8") != content).getOrElse(false)
             }
           }
         }
@@ -280,25 +264,16 @@
         val headId   = git.getRepository.resolve(Constants.HEAD + "^{commit}")
         var removed  = false
 
-        using(new RevWalk(git.getRepository)){ revWalk =>
-          using(new TreeWalk(git.getRepository)){ treeWalk =>
-            val index = treeWalk.addTree(revWalk.parseTree(headId))
-            treeWalk.setRecursive(true)
-            while(treeWalk.next){
-              val path = treeWalk.getPathString
-              val tree = treeWalk.getTree(index, classOf[CanonicalTreeParser])
-              if(path != pageName + ".md"){
-                builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
-              } else {
-                removed = true
-              }
-            }
+        JGitUtil.processTree(git, headId){ (path, tree) =>
+          if(path != pageName + ".md"){
+            builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
+          } else {
+            removed = true
           }
-
-          if(removed){
-            builder.finish()
-            JGitUtil.createNewCommit(git, inserter, headId, builder.getDirCache.writeTree(inserter), committer, mailAddress, message)
-          }
+        }
+        if(removed){
+          builder.finish()
+          JGitUtil.createNewCommit(git, inserter, headId, builder.getDirCache.writeTree(inserter), committer, mailAddress, message)
         }
       }
     }
diff --git a/src/main/scala/util/ControlUtil.scala b/src/main/scala/util/ControlUtil.scala
index 0b0f712..c231fb0 100644
--- a/src/main/scala/util/ControlUtil.scala
+++ b/src/main/scala/util/ControlUtil.scala
@@ -37,15 +37,4 @@
   def using[T](treeWalk: TreeWalk)(f: TreeWalk => T): T =
     try f(treeWalk) finally treeWalk.release()
 
-
-//  def withTmpRefSpec[T](ref: RefSpec, git: Git)(f: RefSpec => T): T = {
-//    try {
-//      f(ref)
-//    } finally {
-//      val refUpdate = git.getRepository.updateRef(ref.getDestination)
-//      refUpdate.setForceUpdate(true)
-//      refUpdate.delete()
-//    }
-//  }
-
 }
diff --git a/src/main/scala/util/FileUtil.scala b/src/main/scala/util/FileUtil.scala
index e4c052f..f3bba07 100644
--- a/src/main/scala/util/FileUtil.scala
+++ b/src/main/scala/util/FileUtil.scala
@@ -31,24 +31,6 @@
   
   def isText(content: Array[Byte]): Boolean = !content.contains(0)
 
-//  def createZipFile(dest: File, dir: File): Unit = {
-//    def addDirectoryToZip(out: ZipArchiveOutputStream, dir: File, path: String): Unit = {
-//      dir.listFiles.map { file =>
-//        if(file.isFile){
-//          out.putArchiveEntry(new ZipArchiveEntry(path + "/" + file.getName))
-//          out.write(FileUtils.readFileToByteArray(file))
-//          out.closeArchiveEntry
-//        } else if(file.isDirectory){
-//          addDirectoryToZip(out, file, path + "/" + file.getName)
-//        }
-//      }
-//    }
-//
-//    using(new ZipArchiveOutputStream(dest)){ out =>
-//      addDirectoryToZip(out, dir, dir.getName)
-//    }
-//  }
-
   def getFileName(path: String): String = defining(path.lastIndexOf('/')){ i =>
     if(i >= 0) path.substring(i + 1) else path
   }
diff --git a/src/main/scala/util/JGitUtil.scala b/src/main/scala/util/JGitUtil.scala
index ef41f6b..62887a7 100644
--- a/src/main/scala/util/JGitUtil.scala
+++ b/src/main/scala/util/JGitUtil.scala
@@ -585,4 +585,17 @@
     existIds.toSeq
   }
 
+  def processTree(git: Git, id: ObjectId)(f: (String, CanonicalTreeParser) => Unit) = {
+    using(new RevWalk(git.getRepository)){ revWalk =>
+      using(new TreeWalk(git.getRepository)){ treeWalk =>
+        val index = treeWalk.addTree(revWalk.parseTree(id))
+        treeWalk.setRecursive(true)
+        while(treeWalk.next){
+          f(treeWalk.getPathString, treeWalk.getTree(index, classOf[CanonicalTreeParser]))
+        }
+      }
+    }
+  }
+
+
 }