1 files changed, 34 insertions, 0 deletions
diff --git a/plugins/google-java-format/GoogleJavaFormat.scala b/plugins/google-java-format/GoogleJavaFormat.scala
new file mode 100644
index 0000000..cbccb94
--- /dev/null
+++ b/plugins/google-java-format/GoogleJavaFormat.scala
@@ -0,0 +1,34 @@
+package cbt
+
+import java.io.File
+import java.nio.file.Files._
+import java.nio.file._
+
+import com.google.googlejavaformat.java._
+
+trait GoogleJavaFormat extends BaseBuild {
+  def googleJavaFormat() = GoogleJavaFormat.apply( lib, sourceFiles.filter(_.string endsWith ".java") ).format
+}
+
+object GoogleJavaFormat{
+  case class apply( lib: Lib, files: Seq[File] ){
+    /** @param whiteSpaceInParenthesis more of a hack to make up for missing support in Scalafmt. Does not respect alignment and maxColumn. */
+    def format = {
+      val (successes, errors) = lib.transformFilesOrError( files, in =>
+        try{
+          Right( new Formatter().formatSource(in) )
+        } catch {
+          case e: FormatterException => Left( e )
+        }
+      )
+      if(errors.nonEmpty)
+        throw new RuntimeException(
+          "Google Java Format failed to parse some files:\n" ++ errors.map{
+            case (file, error) => file.string ++ ":" ++ error.toString
+          }.mkString("\n"),
+          errors.head._2
+        )
+      successes
+    }
+  }
+}