Added jsx-self babel transform plugin

packages/babel-plugin-transform-react-jsx-self/src/index.js

@@ -0,0 +1,30 @@
+
+ /**
+ * This adds {fileName, lineNumber} annotations to React component definitions
+ * and to jsx tag literals.
+ *
+ *
+ * == JSX Literals ==
+ *
+ * <sometag />
+ *
+ * becomes:
+ *
+ * <sometag __self={this} />
+ */
+
+const TRACE_ID = "__self";
+
+export default function ({ types: t }) {
+  let visitor = {
+    JSXOpeningElement(node) {
+      const id = t.jSXIdentifier(TRACE_ID);
+      const trace = t.identifier("this");
+      node.container.openingElement.attributes.push(t.jSXAttribute(id, t.jSXExpressionContainer(trace)));
+    }
+  };
+
+  return {
+    visitor
+  };
+}