1 files changed, 44 insertions, 0 deletions
diff --git a/main/core/src/mill/util/JsonFormatters.scala b/main/core/src/mill/util/JsonFormatters.scala
new file mode 100644
index 00000000..f92941f7
--- /dev/null
+++ b/main/core/src/mill/util/JsonFormatters.scala
@@ -0,0 +1,44 @@
+package mill.util
+
+import ammonite.ops.{Bytes, Path}
+import upickle.Js
+import upickle.default.{ReadWriter => RW}
+object JsonFormatters extends JsonFormatters
+trait JsonFormatters {
+  implicit val pathReadWrite: RW[ammonite.ops.Path] = upickle.default.readwriter[String]
+    .bimap[ammonite.ops.Path](
+      _.toString,
+      Path(_)
+    )
+
+  implicit val bytesReadWrite: RW[Bytes] = upickle.default.readwriter[String]
+    .bimap(
+      o => javax.xml.bind.DatatypeConverter.printBase64Binary(o.array),
+      str => new Bytes(javax.xml.bind.DatatypeConverter.parseBase64Binary(str))
+    )
+
+
+  implicit lazy val crFormat: RW[ammonite.ops.CommandResult] = upickle.default.macroRW
+
+  implicit lazy val modFormat: RW[coursier.Module] = upickle.default.macroRW
+  implicit lazy val depFormat: RW[coursier.Dependency]= upickle.default.macroRW
+  implicit lazy val attrFormat: RW[coursier.Attributes] = upickle.default.macroRW
+  implicit val stackTraceRW = upickle.default.readwriter[Js.Obj].bimap[StackTraceElement](
+    ste => Js.Obj(
+      "declaringClass" -> Js.Str(ste.getClassName),
+      "methodName" -> Js.Str(ste.getMethodName),
+      "fileName" -> Js.Str(ste.getFileName),
+      "lineNumber" -> Js.Num(ste.getLineNumber)
+    ),
+    {case json: Js.Obj =>
+      new StackTraceElement(
+        json("declaringClass").str.toString,
+        json("methodName").str.toString,
+        json("fileName").str.toString,
+        json("lineNumber").num.toInt
+      )
+    }
+  )
+
+
+}