Fixes: less#3300

matthew-dean · Aug 6, 2018 · 2053466 · 2053466
1 parent 4e903e8
commit 2053466
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Showing 11 changed files with 1,126 additions and 1,086 deletions.
diff --git a/Gruntfile.js b/Gruntfile.js
@@ -292,6 +292,7 @@ module.exports = function (grunt) {
                 keepRunner: true,
                 host: 'http://localhost:8081/',
                 vendor: [
+                    './node_modules/phantomjs-polyfill-object-assign/object-assign-polyfill.js',
                     'test/browser/vendor/promise.js',
                     'test/browser/jasmine-jsreporter.js',
                     'test/browser/common.js',

diff --git a/lib/less-browser/index.js b/lib/less-browser/index.js
@@ -30,7 +30,13 @@ module.exports = function(window, options) {
     var typePattern = /^text\/(x-)?less$/;
 
     function clone(obj) {
-        return JSON.parse(JSON.stringify(obj || {}));
+        var cloned = {};
+        for (var prop in obj) {
+            if (obj.hasOwnProperty(prop)) {
+                cloned[prop] = obj[prop];
+            }
+        }
+        return cloned;
     }
 
     // only really needed for phantom

diff --git a/lib/less/source-map-output.js b/lib/less/source-map-output.js
@@ -58,7 +58,7 @@ module.exports = function (environment) {
             sourceColumns,
             i;
 
-        if (fileInfo) {
+        if (fileInfo && fileInfo.filename) {
             var inputSource = this._contentsMap[fileInfo.filename];
 
             // remove vars/banner added to the top of the file
@@ -77,7 +77,7 @@ module.exports = function (environment) {
         lines = chunk.split('\n');
         columns = lines[lines.length - 1];
 
-        if (fileInfo) {
+        if (fileInfo && fileInfo.filename) {
             if (!mapLines) {
                 this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column},
                     original: { line: sourceLines.length, column: sourceColumns.length},

diff --git a/lib/less/utils.js b/lib/less/utils.js
@@ -1,5 +1,6 @@
 /* jshint proto: true */
 var Constants = require('./constants');
+var clone = require('clone');
 
 var utils = {
     getLocation: function(index, inputStream) {
@@ -39,6 +40,9 @@ var utils = {
         return cloned;
     },
     copyOptions: function(obj1, obj2) {
+        if (obj2 && obj2._defaults) {
+            return obj2;
+        }
         var opts = utils.defaults(obj1, obj2);
         if (opts.strictMath) {
             opts.math = Constants.Math.STRICT_LEGACY;
@@ -79,26 +83,15 @@ var utils = {
         return opts;
     },
     defaults: function(obj1, obj2) {
-        if (!obj2._defaults || obj2._defaults !== obj1) {
-            for (var prop in obj1) {
-                if (obj1.hasOwnProperty(prop)) {
-                    if (!obj2.hasOwnProperty(prop)) {
-                        obj2[prop] = obj1[prop];
-                    }
-                    else if (Array.isArray(obj1[prop])
-                        && Array.isArray(obj2[prop])) {
-
-                        obj1[prop].forEach(function(p) {
-                            if (obj2[prop].indexOf(p) === -1) {
-                                obj2[prop].push(p);
-                            }
-                        });
-                    }
-                }
-            }
+        var newObj = obj2 || {};
+        if (!obj2._defaults) {
+            newObj = {};
+            var defaults = clone(obj1);
+            newObj._defaults = defaults;
+            var cloned = obj2 ? clone(obj2) : {};
+            Object.assign(newObj, defaults, cloned);
         }
-        obj2._defaults = obj1;
-        return obj2;
+        return newObj;
     },
     merge: function(obj1, obj2) {
         for (var prop in obj2) {