add (currently non-working) example how to use it for built-in rewrites

4 files changed, 64 insertions, 0 deletions

diff --git a/examples/scalafix-example/Main.scala b/examples/scalafix-example/Main.scala
new file mode 100644
index 0000000..c82c77b
--- /dev/null
+++ b/examples/scalafix-example/Main.scala
@@ -0,0 +1,9 @@
+object Main{
+  lazy val x = 1 + 1
+  
+  implicit def toString(i :Int) = i.toString
+
+  def main( args: Array[String] ){
+    println("Hello world!")
+  }
+}
diff --git a/examples/scalafix-example/build/build.scala b/examples/scalafix-example/build/build.scala
new file mode 100644
index 0000000..eff4176
--- /dev/null
+++ b/examples/scalafix-example/build/build.scala
@@ -0,0 +1,28 @@
+import cbt._
+
+import scala.meta._
+import scalafix.rewrite._
+import scalafix.util._
+import scalafix.util.TreePatch._
+import scalafix.util.TokenPatch._
+
+class Build(val context: Context) extends BaseBuild{
+  override def compile = {
+    new BasicBuild(context) with Scalafix{
+      override def scalafix = super.scalafix.copy(
+        patches =
+          Seq(
+            AddGlobalImport(
+              importer"scala.collection.immutable"
+            )
+          ),
+        rewrites = Seq(
+          ProcedureSyntax,
+          ExplicitImplicit,
+          VolatileLazyVal
+        )
+      )
+    }.scalafix.apply
+    super.compile // <- as scalafix trigger compile already before re-writing, this will just return the cached compile result before rewriting
+  }
+}
diff --git a/examples/scalafix-example/build/build/build.scala b/examples/scalafix-example/build/build/build.scala
new file mode 100644
index 0000000..404356f
--- /dev/null
+++ b/examples/scalafix-example/build/build/build.scala
@@ -0,0 +1,5 @@
+import cbt._
+
+class Build(val context: Context) extends BuildBuild {
+  override def dependencies = super.dependencies :+ plugins.scalafix
+}
diff --git a/test/test.scala b/test/test.scala
index 3b296a1..b97c36e 100644
--- a/test/test.scala
+++ b/test/test.scala
@@ -444,6 +444,28 @@ object Main{
       lib.write(sourceFile, sourceBefore)
     }
 
+    /*
+    // currently fails with
+    // java.lang.UnsupportedOperationException: scalafix.rewrite.ScalafixMirror.fromMirror $anon#typeSignature requires the semantic api
+    {
+      val sourceFile = cbtHome / "examples" / "scalafix-example" / "Main.scala"
+      val sourceBefore = sourceFile.readAsString
+      runCbt("../examples/scalafix-example", Seq("clean","force"))
+      val res = runCbt("../examples/scalafix-example", Seq("compile"))
+      assert(res.exit0)
+      val sourceAfter = sourceFile.readAsString
+      assert(!(sourceBefore contains "@volatile"))
+      assert(!(sourceBefore contains ": Unit"))
+      assert(!(sourceBefore contains ": String "))
+      assert(!(sourceBefore contains "import scala.collection.immutable"))
+      assert(sourceAfter contains "@volatile")
+      assert(sourceAfter contains ": Unit")
+      assert(sourceAfter contains ": String ")
+      assert(sourceAfter contains "import scala.collection.immutable")
+      lib.write(sourceFile, sourceBefore)
+    }
+    */
+
     System.err.println(" DONE!")
     System.err.println( successes.toString ++ " succeeded, "++ failures.toString ++ " failed" )
     if(failures > 0) ExitCode.Failure else ExitCode.Success