Add follow symlink in BundlerIO to help using scalakit as a git submodule (#58)

* do not take into account the generated scala file as itself a dependency

* update scala release to 2.12.4

* Generated scala file is now formatted using scalafmt

* Add FOLLOW_LINKS option to look for source file to integrate, really useful when scalakit is used as a git submodule

* Add information on how to use the scalakit as a git submodule

* Add vi/vim temporary file into ignore list

Author: dacr

.gitignore

@@ -18,4 +18,8 @@ project/boot/
 
 ### Kit
 
-brutaltester
+brutaltester
+
+### Vi
+*.swp
+

README.md

@@ -48,6 +48,12 @@ The example Bot [Ghost in the Cell](https://www.codingame.com/multiplayer/bot-pr
 
 5. Open CodinGame Sync to synchronize Player.scala file continuously to online IDE
 
+## CodinGame Scala Kit integration into your own git depo
+
+Using CodinGame Scala Kit as a git submodule inside your own git depot you can both store your solutions into
+a private depot, and still use and contribute to this scala kit.
+[All instructions are available within this example project](https://github.com/dacr/codingame-with-scalakit-example)
+
 ## Screenshot
 ![alt tag](./asset/screenshot.png)
 

src/main/scala/com/truelaurel/codingame/tool/bundle/BundlerIo.scala

@@ -1,7 +1,7 @@
 package com.truelaurel.codingame.tool.bundle
 
 import java.io.{File, PrintWriter}
-import java.nio.file.{Files, Paths}
+import java.nio.file.{Files, Paths, FileVisitOption}
 import java.util.Objects
 
 import scala.io.Source
@@ -55,7 +55,7 @@ case class StdBundlerIo(srcFolder: String = "./src/main/scala") extends BundlerI
   }
 
   def findFile(fileName: String): File = {
-    Files.find(Paths.get("src"), Int.MaxValue, (path, _) => path.endsWith(fileName))
+    Files.find(Paths.get("src"), Int.MaxValue, (path, _) => path.endsWith(fileName), FileVisitOption.FOLLOW_LINKS)
       .findAny()
       .orElseThrow(() => new IllegalArgumentException(s"$fileName not found"))
       .toFile