First build

node_modules/roarr/dist/factories/createNodeWriter.js.flow

@@ -0,0 +1,22 @@
+// @flow
+
+import type {
+  WriterType,
+} from '../types';
+
+const createBlockingWriter = (stream: stream$Writable): WriterType => {
+  return {
+    write: (message: string) => {
+      stream.write(message + '\n');
+    },
+  };
+};
+
+export default (): WriterType => {
+  // eslint-disable-next-line no-process-env
+  const targetStream = (process.env.ROARR_STREAM || 'STDOUT').toUpperCase();
+
+  const stream = targetStream.toUpperCase() === 'STDOUT' ? process.stdout : process.stderr;
+
+  return createBlockingWriter(stream);
+};