From 1e3c01dd07a7322b9483be134dc1b57bc9fb6475 Mon Sep 17 00:00:00 2001
From: "Paulo \"JCranky\" Siqueira" <paulo.siqueira@gmail.com>
Date: Thu, 22 Dec 2016 12:26:04 +0100
Subject: [PATCH] Remove null usage from scalamd/Main (#32)

---
 README.md                                     |  4 +-
 .../src/org/fusesource/scalamd/Main.scala     | 46 +++++++++----------
 2 files changed, 24 insertions(+), 26 deletions(-)

diff --git a/README.md b/README.md
index 89dbf29..92c915b 100644
--- a/README.md
+++ b/README.md
@@ -25,8 +25,8 @@ Scalatron is licensed under the Creative Commons Attribution 3.0 Unported Licens
 
 ## Build a new docker image
 
-    sbt docker
+```sbt docker```
 
 ## Run inside a docker container
 
-    docker run -d -p 8080:8080 -v /tmp/bots:/opt/Scalatron/bots scalatron/scalatron:latest
+```docker run -d -p 8080:8080 -v /tmp/bots:/opt/Scalatron/bots --name scalatron scalatron/scalatron:latest```
diff --git a/ScalaMarkdown/src/org/fusesource/scalamd/Main.scala b/ScalaMarkdown/src/org/fusesource/scalamd/Main.scala
index e5c0a81..556efcb 100644
--- a/ScalaMarkdown/src/org/fusesource/scalamd/Main.scala
+++ b/ScalaMarkdown/src/org/fusesource/scalamd/Main.scala
@@ -113,30 +113,28 @@ object Main {
                        outputBaseDirectoryPath: String,
                        verbose: Boolean): Unit = {
     val inputDirectory = new File(inputDirectoryPath)
-    if (inputDirectory.getName.startsWith("_")) {
-      // skip
-    } else {
-      val fileList = inputDirectory.listFiles()
-      if (fileList == null || fileList.isEmpty) {
-        System.err.println(
-          "warning: no files to process in: " + inputDirectoryPath)
-      } else {
-        val (directoryCollection, fileCollection) =
-          fileList.partition(_.isDirectory)
-        directoryCollection.foreach(
-          dir =>
-            processDirectory(dir.getAbsolutePath,
-                             outputDirectoryPath + "/" + dir.getName,
-                             inputBaseDirectoryPath,
-                             outputBaseDirectoryPath,
-                             verbose))
-        fileCollection.foreach(
-          file =>
-            processFile(file.getAbsolutePath,
-                        outputDirectoryPath,
-                        inputBaseDirectoryPath,
-                        outputBaseDirectoryPath,
-                        verbose))
+
+    if (!inputDirectory.getName.startsWith("_")) {
+      val filesOpt = Option(inputDirectory.listFiles()).filter(_.nonEmpty)
+      if (filesOpt.isEmpty)
+        System.err.println("warning: no files to process in: " + inputDirectoryPath)
+
+      filesOpt.foreach { fileList =>
+        val (directoryCollection, fileCollection) = fileList.partition(_.isDirectory)
+        directoryCollection.foreach { dir =>
+          processDirectory(dir.getAbsolutePath,
+            outputDirectoryPath + "/" + dir.getName,
+            inputBaseDirectoryPath,
+            outputBaseDirectoryPath,
+            verbose)
+        }
+        fileCollection.foreach { file =>
+          processFile(file.getAbsolutePath,
+            outputDirectoryPath,
+            inputBaseDirectoryPath,
+            outputBaseDirectoryPath,
+            verbose)
+        }
       }
     }
   }