update

node_modules/bs-recipes/recipes/middleware.css.injection/app.js

@@ -0,0 +1,40 @@
+/**
+ * Require Browsersync
+ */
+var browserSync = require("browser-sync");
+
+/**
+ * Run the middleware on files that contain .less
+ */
+function lessMiddleware (req, res, next) {
+    var parsed = require("url").parse(req.url);
+    if (parsed.pathname.match(/\.less$/)) {
+        return less(parsed.pathname).then(function (o) {
+            res.setHeader('Content-Type', 'text/css');
+            res.end(o.css);
+        });
+    }
+    next();
+}
+
+/**
+ * Compile less
+ */
+function less(src) {
+    var f = require('fs').readFileSync('app' + src).toString();
+    return require('less').render(f);
+}
+
+/**
+ * Run Browsersync with less middleware
+ */
+browserSync({
+    files: "app/css/*.less",
+    server: "app",
+    injectFileTypes: ["less"],
+    /**
+     * Catch all requests, if any are for .less files, recompile on the fly and
+     * send back a CSS response
+     */
+    middleware: lessMiddleware
+});