add package to generated Main.scala to avoid classpath weirdnesses

caused by multiple root package Main classes from different subproject
or test projects ending up on the same classpath

3 files changed, 82 insertions, 13 deletions

diff --git a/stage2/Lib.scala b/stage2/Lib.scala
index 0d382f2..fc53c4f 100644
--- a/stage2/Lib.scala
+++ b/stage2/Lib.scala
@@ -15,7 +15,7 @@ import scala.util._
 case class Developer(id: String, name: String, timezone: String, url: URL)
 
 /** Don't extend. Create your own libs :). */
-final class Lib(val logger: Logger) extends Stage1Lib(logger) with Scaffold{
+final class Lib(val logger: Logger) extends Stage1Lib(logger){
   lib =>
 
   val buildFileName = "build.scala"
@@ -28,16 +28,11 @@ final class Lib(val logger: Logger) extends Stage1Lib(logger) with Scaffold{
   This can either the Build itself, of if exists a BuildBuild or a BuildBuild for a BuildBuild and so on.
   */
   def loadRoot(context: Context): BuildInterface = {
-    def findStartDir(directory: File): File = {
-      val buildDir = realpath( directory ++ "/build" )
-      if(buildDir.exists) findStartDir(buildDir) else directory
-    }
-
     val directory = context.workingDirectory
 
     context.logger.composition( context.logger.showInvocation("Build.loadRoot",directory) )
 
-    val start = findStartDir(directory)
+    val start = lib.findInnerMostModuleDirectory(directory)
 
     val useBasicBuild = directory == start && start.getName != buildDirectoryName
 
@@ -534,4 +529,15 @@ final class Lib(val logger: Logger) extends Stage1Lib(logger) with Scaffold{
       }
     }
   }
+
+  def findInnerMostModuleDirectory(directory: File): File = {
+    val buildDir = realpath( directory ++ ("/" ++ lib.buildDirectoryName) )
+    // do not appent buildFileName here, so that we detect empty build folders
+    if(buildDir.exists) findInnerMostModuleDirectory(buildDir) else directory
+  }
+  def findOuterMostModuleDirectory(directory: File): File = {
+    if(
+      ( directory.getParentFile ++ ("/" ++ lib.buildDirectoryName) ).exists
+    ) findOuterMostModuleDirectory(directory.getParentFile) else directory
+  }
 }
diff --git a/stage2/Scaffold.scala b/stage2/Scaffold.scala
index 866e5da..b110258 100644
--- a/stage2/Scaffold.scala
+++ b/stage2/Scaffold.scala
@@ -2,8 +2,8 @@ package cbt
 import java.io._
 import java.nio.file._
 import java.net._
-trait Scaffold{
-  def logger: Logger
+class Scaffold( logger: Logger ){
+  val lib = new Lib(logger)
 
   private def createFile( projectDirectory: File, fileName: String, code: String ){
     val outputFile = projectDirectory ++ ("/" ++ fileName)
@@ -12,10 +12,42 @@ trait Scaffold{
     println( GREEN ++ "Created " ++ fileName ++ RESET )
   }
 
+  private[cbt] def packageName(name: String) = {
+    def stripNonAlPrefix = (_:String).dropWhile(
+      !(('a' to 'z') ++ ('A' to 'Z') ++ Seq('_')).contains(_)
+    )
+    def removeNonAlNumPlusSelected = "([^-a-zA-Z0-9_\\.\\\\/])".r.replaceAllIn(_:String, "")
+    def replaceSpecialWithUnderscore = "([-\\. ])".r.replaceAllIn(_:String, "_")
+    def removeRepeatedDots = "\\.+".r.replaceAllIn(_:String, ".")
+    val transform = (
+      (
+        stripNonAlPrefix
+        andThen
+        removeNonAlNumPlusSelected
+        andThen
+        replaceSpecialWithUnderscore
+      ).andThen(
+        (_:String).replace("/",".").replace("\\",".").toLowerCase
+      ) andThen removeRepeatedDots
+
+    )
+
+    transform( name )
+  }
+
+  private[cbt] def packageFromDirectory(directory: File) = {
+    packageName(
+      directory.getAbsolutePath.stripPrefix(
+        lib.findOuterMostModuleDirectory( directory ).getParentFile.getAbsolutePath
+      )
+    )
+  }
+
   def createMain(
     projectDirectory: File
-  ): Unit = { 
-    createFile(projectDirectory, "Main.scala", s"""object Main{
+  ): Unit = {
+    createFile(projectDirectory, "Main.scala", s"""package ${packageFromDirectory(projectDirectory)}
+object Main{
   def main( args: Array[String] ): Unit = {
     println( Console.GREEN ++ "Hello World" ++ Console.RESET )
   }
@@ -50,3 +82,33 @@ class Build(val context: Context) extends BaseBuild{
     )
   }
 }
+object ScaffoldTest{
+  val scaffold = new Scaffold(new Logger(None,System.currentTimeMillis))
+  import scaffold._
+  def main(args: Array[String]): Unit = {
+    def assertEquals[T](left: T, right: T) = {
+      assert( left == right, left + " == " + right )
+    }
+    assertEquals(
+      packageName( "AsdfAsdfAsdf" ), "asdfasdfasdf"
+    )
+    assertEquals(
+      packageName( "_AsdfA4sdf" ), "_asdfa4sdf"
+    )
+    assertEquals(
+      packageName( "-AsdfAsdf" ), "asdfasdf"
+    )
+    assertEquals(
+      packageName( "asdf 4aSdf" ), "asdf4asdf"
+    )
+    assertEquals(
+      packageName( "&/(&%$&&/(asdf" ), "asdf"
+    )
+    assertEquals(
+      packageName( "AAA" ), "aaa"
+    )
+    assertEquals(
+      packageName( "/AAA/a_a/a.a" ), "aaa.a_a.a_a"
+    )
+  }
+}
diff --git a/stage2/ToolsTasks.scala b/stage2/ToolsTasks.scala
index 25156fb..943f096 100644
--- a/stage2/ToolsTasks.scala
+++ b/stage2/ToolsTasks.scala
@@ -15,8 +15,9 @@ class ToolsTasks(
   implicit val logger: Logger = lib.logger
   implicit val transientCache: java.util.Map[AnyRef,AnyRef] = new java.util.HashMap
   private def Resolver( urls: URL* ) = MavenResolver(cbtLastModified,mavenCache,urls: _*)
-  def createMain: Unit = lib.createMain( cwd )
-  def createBuild: Unit = lib.createBuild( cwd )
+  val scaffold = new Scaffold(logger)
+  def createMain: Unit = scaffold.createMain( cwd )
+  def createBuild: Unit = scaffold.createBuild( cwd )
   def gui = NailgunLauncher.main(Array(
     "0.0",
     (cbtHome / "tools" / "gui").getAbsolutePath,