From 36094e8d4721b050420dbf935fdad6149e2e754a Mon Sep 17 00:00:00 2001
From: Isaiah Odhner <isaiahodhner@gmail.com>
Date: Wed, 16 Sep 2015 09:38:49 -0400
Subject: [PATCH] Handle build failure

---
 lib/exe.js | 52 +++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 45 insertions(+), 7 deletions(-)

diff --git a/lib/exe.js b/lib/exe.js
index d96677d..142af42 100644
--- a/lib/exe.js
+++ b/lib/exe.js
@@ -196,18 +196,37 @@ exports.compile = function (options, complete) {
 			}
 		},
 
-        /**
-         * monkeypatch child_process.js so nexejs knows when it is a forked process
-         */
-        function monkeyPatchChildProc(next) {
-            _monkeyPatchChildProcess(nodeCompiler, next);
-        },
+		/**
+		 * monkeypatch child_process.js so nexejs knows when it is a forked process
+		 */
+		function monkeyPatchChildProc(next) {
+			_monkeyPatchChildProcess(nodeCompiler, next);
+		},
+
+		/**
+		 * If an old compiled executable exists in the Release directory, delete it.
+		 * This lets us see if the build failed by checking the existence of this file later.
+		 */
+
+		function cleanUpOldExecutable (next) {
+			fs.unlink(nodeCompiler.releasePath, function (err) {
+				if (err) {
+					if (err.code === "ENOENT") {
+						next();
+					} else {
+						throw err;
+					}
+				} else {
+					next();
+				}
+			});
+		},
 
 		/**
 		 * compile the node application
 		 */
 
-		function makeExe (next) {
+		function makeExecutable (next) {
 			if(isWin) {
 				_log("vcbuild [make stage]");
 			} else {
@@ -224,6 +243,25 @@ exports.compile = function (options, complete) {
 			mkdirp(path.dirname(options.output), function(){ next(); });
 		},
 
+		/**
+		 * Verify that the executable was compiled successfully
+		 */
+
+		function checkThatExecutableExists (next) {
+			fs.access(nodeCompiler.releasePath, function (err) {
+				if (err) {
+					_log("error",
+						"The release executable has not been generated. " +
+						"This indicates a failure in the build process. " +
+						"There is likely additional information above."
+					);
+					throw new Error("The release executable was not built ('" + nodeCompiler.releasePath + "')");
+				} else {
+					next();
+				}
+			});
+		},
+
 		/**
 		 * Copy the compilied binary to the output specified.
 		 */