Prevent build errors from stopping the watch process

specious · specious · commit f8571d2835e9 · 2018-01-18T14:28:12.000-05:00
diff --git a/gulpfile.js b/gulpfile.js
@@ -21,17 +21,6 @@ var paths = {
   pug:    './index.pug'
 }
 
-//
-// Internal watch triggers
-//
-
-gulp.task( '_watch', function() {
-  gulp.watch( paths.styles.watch, gulp.series( 'default' ) )
-  gulp.watch( paths.pug,    gulp.series( 'pug' ) )
-  gulp.watch( paths.config, gulp.series( 'pug' ) )
-  gulp.watch( paths.images, gulp.series( 'pug' ) )
-} )
-
 //
 // Build style.css
 //
@@ -74,6 +63,23 @@ gulp.task( 'pug', function() {
     .pipe( gulp.dest( './' ) )
 } )
 
+//
+// Watch file changes and trigger build tasks
+//
+
+gulp.task( '_watch', function() {
+  // Task watch wrapper that prevents an error from bubbling up and stopping the watch process
+  function gulpWatch( globs, fn ) {
+    gulp.watch( globs, fn )
+      .on( 'error', function() { this.emit('end') } )
+  }
+
+  gulpWatch( paths.styles.watch, gulp.series( 'default' ) )
+  gulpWatch( paths.pug,    gulp.series( 'pug' ) )
+  gulpWatch( paths.config, gulp.series( 'pug' ) )
+  gulpWatch( paths.images, gulp.series( 'pug' ) )
+} )
+
 //
 // The default task is to build the product
 //
