exe: handle tar extraction & download failures better

lib/bundle.js

@@ -44,8 +44,6 @@ function bundle (input, nc, complete) {
   var ws = fs.createWriteStream(bundlePath);
   var proc = spawn('node', [path.join(__dirname, '../', 'node_modules/browserify/bin/cmd.js'), '--node', input ]);
 
-  // TODO: Get path of nexe directory, and refer to it.
-
   proc.stdout.pipe(ws);
 
   proc.on('error', function(err) {

lib/exe.js

@@ -359,6 +359,11 @@ function _downloadNode(version, directory, nodeConfigureArgs, nodeMakeArgs, comp
 				tar.stderr.pipe(process.stderr);
 
 				tar.on("close", function () { next(); })
+        tar.on("error", function (err) {
+          console.log(err);
+          _log("error", "failed to extract the node tar file.");
+          process.exit(1);
+        });
 			}
 		},
 
@@ -701,6 +706,12 @@ function _logProgress (req) {
 		});
 	});
 
+  req.on("error", function(err) {
+    console.log(err);
+    _log("error", "failed to download node sources,");
+    process.exit(1);
+  });
+
 	return req;
 }
 
@@ -711,6 +722,7 @@ function _logProgress (req) {
  * @param {object} options - fallback options
  *
  * @todo implement options overriding package defaults.
+ * @todo make this much less hackily implemented....
  *
  * @return {object} nexe.compile options object
 **/

lib/log.js

@@ -1,5 +1,6 @@
 /**
  * Copyright (c) 2013 Craig Condon
+ * Copyright (c) 2015-2016 Jared Allard
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the