From 9ed333ed7ea50aabbbca64c779c593f2c4b950ad Mon Sep 17 00:00:00 2001
From: Kamen Bundev <bundyo@gmail.com>
Date: Mon, 13 May 2019 14:34:13 +0300
Subject: [PATCH] Add support for custom importers similar to node-sass ones 
 (without done() async)

---
 index.js | 32 ++++++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

diff --git a/index.js b/index.js
index 4c3655b..7bd4d16 100644
--- a/index.js
+++ b/index.js
@@ -5,6 +5,7 @@ var sassJs = require('sass.js'),
     _ = require('lodash'),
     path = require('path'),
     fs = require('fs'),
+    utils = require('loader-utils'),
 
     getNodeModuleDir = require('./lib/get-node-module-dir'),
     getResolvedPath = require('./lib/get-resolved-path'),
@@ -16,8 +17,35 @@ module.exports = function(content) {
 
     sassJs.importer(function(request, done) {
         // Adapted from
-        // eslint-disable-next-line max-len 
+        // eslint-disable-next-line max-len
         // https://github.com/amiramw/grunt-contrib-sassjs/blob/a65f869df967a4e417c4260fd93239e4f0bc55ee/tasks/sass.js#L11
+
+        var options = utils.getOptions(self);
+
+        if (options && options.importer) {
+            if (!(options.importer instanceof Array)) {
+                options.importer = [ options.importer ];
+            }
+
+            options.importer.some((importer) => {
+                var imported = importer(request.current, request.previous);
+
+                if (imported.file !== null) {
+                    request.current = imported.file;
+                    request.resolved = imported.file;
+
+                    return true;
+                }
+
+                if (imported.contents !== null) {
+                    request.path = request.resolved;
+                    request.content = imported.contents;
+
+                    return true;
+                }
+            })
+        }
+
         if (request.path) {
             done();
         } else if (request.resolved) {
@@ -84,4 +112,4 @@ function getRootNodeModulesDir(name) {
         }
         throw e;
     }
-}
\ No newline at end of file
+}