make build fail on compile errors

3 files changed, 17 insertions, 11 deletions

diff --git a/build/gulpfile.plugins.js b/build/gulpfile.plugins.js
index 51f0b50c6fa..efbf493216a 100644
--- a/build/gulpfile.plugins.js
+++ b/build/gulpfile.plugins.js
@@ -114,7 +114,7 @@ var tasks = readAllPlugins()
 					.pipe(tsFilter)
 					.pipe(compilation())
 					.pipe(tsFilter.restore)
-					.pipe(quiet ? es.through() : reporter());
+					.pipe(quiet ? es.through() : reporter.end());
 
 				return es.duplex(input, output);
 			};
diff --git a/build/lib/reporter.js b/build/lib/reporter.js
index e3e61b9da91..84c1e9d4805 100644
--- a/build/lib/reporter.js
+++ b/build/lib/reporter.js
@@ -18,7 +18,7 @@ function onEnd() {
 	}
 
 	var errors = _.flatten(allErrors);
-	errors.map(function (err) { console.log('*** Error:', err); });
+	errors.map(function (err) { console.error('*** Error:', err); });
 	console.log('*** Finished with', errors.length, 'errors.');
 }
 
@@ -26,17 +26,23 @@ module.exports = function () {
 	var errors = [];
 	allErrors.push(errors);
 
-	return function (err) {
-		if (err) {
-			errors.push(err);
-			return;
-		}
+	var result = function (err) {
+		errors.push(err);
+	};
 
+	result.end = function (emitError) {
 		errors.length = 0;
 		onStart();
 		return es.through(null, function () {
 			onEnd();
-			this.emit('end');
+
+			if (emitError && errors.length > 0) {
+				this.emit('error', 'Errors occurred.');
+			} else {
+				this.emit('end');
+			}
 		});
 	};
+
+	return result;
 };
\ No newline at end of file
diff --git a/gulpfile.js b/gulpfile.js
index 28159b34305..81ed06e4de1 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -39,7 +39,7 @@ var tsOptions = {
 	sourceRoot: util.toFileUri(rootDir)
 };
 
-function createCompile(build) {
+function createCompile(build, emitError) {
 	var opts = _.clone(tsOptions);
 	opts.inlineSources = !!build;
 
@@ -67,14 +67,14 @@ function createCompile(build) {
 				sourceRoot: tsOptions.sourceRoot
 			}))
 			.pipe(tsFilter.restore)
-			.pipe(quiet ? es.through() : reporter());
+			.pipe(quiet ? es.through() : reporter.end(emitError));
 
 		return es.duplex(input, output);
 	};
 }
 
 function compileTask(out, build) {
-	var compile = createCompile(build);
+	var compile = createCompile(build, true);
 
 	return function () {
 		var src = gulp.src('src/**', { base: 'src' });