Remove xtend

Author: dy

lib/descriptor.js

@@ -4,7 +4,6 @@
  *
  * @module  glsl-js/lib/descriptor
  */
-var extend = require('xtend/mutable');
 var types = require('./types');
 var pick = require('pick-by-alias');
 
@@ -35,12 +34,12 @@ function Descriptor (str, options) {
 
 	//take over existing info
 	if (str instanceof String) {
-		extend(descriptor, pick(str, ['type', 'components', 'visible', 'complexity', 'include', 'optimize']));
+		Object.assign(descriptor, pick(str, ['type', 'components', 'visible', 'complexity', 'include', 'optimize']));
 	}
 
 	//take over options
 	if (options) {
-		extend(descriptor, pick(options, ['type', 'components', 'visible', 'complexity', 'include', 'optimize']))
+		Object.assign(descriptor, pick(options, ['type', 'components', 'visible', 'complexity', 'include', 'optimize']))
 	}
 
 	//in case of undefined complexity we should opt out for average value

lib/index.js

@@ -13,7 +13,6 @@ var Emitter = require('events')
 var inherits = require('inherits')
 var assert = require('assert')
 var parse = require('./parse')
-var extend = require('xtend/mutable')
 var builtins = require('./builtins')
 var types = require('./types')
 var operators = require('./operators')
@@ -33,7 +32,7 @@ var swizzleRE = /^[xyzwstpdrgba]{1,4}$/
 function GLSL (options) {
 	if (!(this instanceof GLSL)) return new GLSL(options)
 
-	extend(this, options)
+	Object.assign(this, options)
 
 	this.reset()
 
@@ -260,7 +259,7 @@ GLSL.prototype.optimizeDescriptor = function (descriptor) {
 			//expand array, if complexity is ok
 			if (descriptor.components && descriptor.components.length > 1) {
 				var include = descriptor.components.map(function (c) { return c.include;}, this).filter(Boolean)
-				return Descriptor(`[${descriptor.components.join(', ')}]`, extend(descriptor, {
+				return Descriptor(`[${descriptor.components.join(', ')}]`, Object.assign(descriptor, {
 					include: include,
 					complexity: complexity
 				}))
@@ -1368,7 +1367,7 @@ GLSL.prototype.variable = function (ident, data, scope) {
 			this.scopes[scope][ident] = {}
 		}
 
-		var variable = extend(this.scopes[scope][ident], data)
+		var variable = Object.assign(this.scopes[scope][ident], data)
 
 		//preset default value for a variable, if undefined
 		if (data.value == null) {

package-lock.json

@@ -10,8 +10,7 @@
     "glsl-tokenizer": "^2.1.5",
     "inherits": "^2.0.1",
     "pick-by-alias": "^1.2.0",
-    "prepr": "^1.1.2",
-    "xtend": "^4.0.1"
+    "prepr": "^1.1.2"
   },
   "devDependencies": {
     "almost-equal": "^1.1.0",