Add --force flag to g8Scaffold command

docs/04/00.md

@@ -23,6 +23,12 @@ Use TAB completion to discover available templates.
 controller   global       model
 ```
 
+To overwrite existing files pass the `--force` flag after the template:
+
+```
+> g8Scaffold model --force
+```
+
 The template plugin will prompt each property that needed to complete the scaffolding process:
 
 ```

scaffold/src/main/scala/ScaffoldPlugin.scala

@@ -33,24 +33,25 @@ object ScaffoldPlugin extends sbt.AutoPlugin {
   import complete._
   import complete.DefaultParsers._
 
-  val parser: Def.Initialize[State => Parser[(String, List[String])]] =
+  val parser: Def.Initialize[State => Parser[(String, Boolean, List[String])]] =
     Def.setting {
       val dir = g8ScaffoldTemplatesDirectory.value
       (state: State) =>
         val templates = Option(dir.listFiles).toList.flatten
           .filter(f => f.isDirectory && !f.isHidden)
           .map(_.getName: Parser[String])
         (Space) ~> token(templates.foldLeft(" ": Parser[String])(_ | _)).examples("<template>") ~
-          (Space ~> StringBasic.examples("--k=v")).* map { case tmp ~ args =>
-            (tmp, args.toList)
+          (Space ~> "--force").? ~
+          (Space ~> StringBasic.examples("--k=v")).* map { case tmp ~ force ~ args =>
+            (tmp, force.nonEmpty, args.toList)
           }
     }
 
   val scaffoldTask =
     Def.inputTask {
-      val (name, args) = parser.parsed
-      val folder       = g8ScaffoldTemplatesDirectory.value
-      G8.fromDirectoryRaw(folder / name, baseDirectory.value, args, false)
+      val (name, forceOverwrite, args) = parser.parsed
+      val folder                       = g8ScaffoldTemplatesDirectory.value
+      G8.fromDirectoryRaw(folder / name, baseDirectory.value, args, forceOverwrite)
         .fold(
           e => sys.error(e),
           r => println("Success :)")

scaffold/src/sbt-test/scaffold/simple/.g8/controller-forcing/app/controllers/$className$.scala

@@ -0,0 +1,14 @@
+package controllers
+
+import play.api._
+import play.api.mvc._
+
+object $className$ extends Controller {
+
+  // In the scripted test this file should overwrite the existing controlle file
+
+  def index = Action {
+    Ok(views.html.index("This application is awesome."))
+  }
+
+}

scaffold/src/sbt-test/scaffold/simple/.g8/controller-forcing/default.properties

@@ -0,0 +1 @@
+className=Application

scaffold/src/sbt-test/scaffold/simple/Application_forced.scala

@@ -0,0 +1,14 @@
+package controllers
+
+import play.api._
+import play.api.mvc._
+
+object Application extends Controller {
+
+  // In the scripted test this file should overwrite the existing controlle file
+
+  def index = Action {
+    Ok(views.html.index("This application is awesome."))
+  }
+
+}

scaffold/src/sbt-test/scaffold/simple/test

@@ -1,3 +1,8 @@
 > g8Scaffold controller --className=Application
 
 $exists app/controllers/Application.scala
+
+> g8Scaffold controller-forcing --force --className=Application
+
+# If files are identical then app/controllers/Application.scala was successfully overwritten
+$must-mirror app/controllers/Application.scala Application_forced.scala