Fixed Foxx preprocessing

js/common/bootstrap/modules.js

@@ -125,7 +125,8 @@ function Module(id, parent) {
   };
 
   if (parent) {
-      Object.keys(parent.context).forEach(function (key) {
+    this.preprocess = parent.preprocess;
+    Object.keys(parent.context).forEach(function (key) {
       if (!hasOwnProperty(this.context, key)) {
         this.context[key] = parent.context[key];
       }
@@ -482,6 +483,9 @@ Module.prototype.require = function(path) {
 Module.prototype._compile = function(content, filename) {
   // remove shebang
   content = content.replace(/^\#\!.*/, '');
+  if (this.preprocess) {
+    content = this.preprocess(content);
+  }
 
   // test for parse errors first and fail early if a parse error detected
   if (!internal.parse(content, filename)) {

js/server/modules/org/arangodb/foxx/routing.js

@@ -261,20 +261,6 @@ var installAssets = function (app, routes) {
 };
 
 
-////////////////////////////////////////////////////////////////////////////////
-/// @brief returns the transform script
-////////////////////////////////////////////////////////////////////////////////
-
-var transformScript = function (file) {
-  if (/\.coffee$/.test(file)) {
-    return function (content) {
-      return preprocess(content, "coffee");
-    };
-  }
-
-  return preprocess;
-};
-
 ////////////////////////////////////////////////////////////////////////////////
 /// @brief create middleware matchers
 ////////////////////////////////////////////////////////////////////////////////
@@ -668,18 +654,18 @@ var mountController = function (service, routes, mount, filename) {
   validateRoute(mount);
 
   // set up a context for the application start function
-  var tmpContext = {
+  var appContext = {
     prefix: arangodb.normalizeURL(`/${mount}`), // app mount
     foxxes: []
   };
 
-  service.run(filename, {appContext: tmpContext});
+  service.run(filename, {appContext, preprocess});
 
   // .............................................................................
   // routingInfo
   // .............................................................................
 
-  var foxxes = tmpContext.foxxes;
+  var foxxes = appContext.foxxes;
   for (var i = 0; i < foxxes.length; i++) {
     var foxx = foxxes[i];
     var ri = foxx.routingInfo;

js/server/modules/org/arangodb/foxx/service.js

@@ -348,6 +348,10 @@ class FoxxService {
       options.appContext
     );
 
+    if (options.preprocess) {
+      module.preprocess = options.preprocess;
+    }
+
     if (options.context) {
       Object.keys(options.context).forEach(function (key) {
         module.context[key] = options.context[key];