npm and error messages

node_modules/tar/lib/global-header-writer.js

@@ -0,0 +1,14 @@
+module.exports = GlobalHeaderWriter
+
+var ExtendedHeaderWriter = require("./extended-header-writer.js")
+  , inherits = require("inherits")
+
+inherits(GlobalHeaderWriter, ExtendedHeaderWriter)
+
+function GlobalHeaderWriter (props) {
+  if (!(this instanceof GlobalHeaderWriter)) {
+    return new GlobalHeaderWriter(props)
+  }
+  ExtendedHeaderWriter.call(this, props)
+  this.props.type = "g"
+}