Dynamically replace SJCL during build process

.gitignore

@@ -1,6 +1,5 @@
 bower_components/
 node_modules/
 doc/
-src/.sjcl.custom.js
 npm-debug.log*
 

.sjcl.js

@@ -1,30 +0,0 @@
-#!/usr/bin/env node
-// Custom build of the Stanford Javascript Crypto Library (SJCL)
-
-'use strict';
-
-const path = require('path');
-const fs = require('fs');
-
-const sjclTarget = path.join(__dirname, 'src/.sjcl.custom.js');
-const sjclPath = path.join(__dirname, 'node_modules/sjcl');
-const sjclSources = [
-	'core/sjcl.js',
-	'core/bitArray.js',
-	'core/codecArrayBuffer.js',
-	'core/sha1.js',
-	'core/sha256.js',
-	'core/sha512.js',
-	'core/hmac.js',
-	'core/exports.js'
-];
-
-const sjclFile = sjclSources.reduce(function(sjcl, file) {
-	let source = fs.readFileSync(path.join(sjclPath, file), {'encoding': 'utf8'});
-	source = `\n/* === ${file} === */\n${source}`;
-
-	return sjcl + source;
-}, '');
-
-fs.writeFileSync(sjclTarget, sjclFile, {'encoding': 'utf8'});
-

.webpack.js

@@ -1,7 +1,11 @@
 'use strict';
 
 const pkg = require('./package.json');
+
 const path = require('path');
+const fs = require('fs');
+const tmp = require('tmp');
+
 const webpack = require('webpack');
 const ClosureCompilerPlugin = require('google-closure-compiler-js').webpack;
 
@@ -13,11 +17,31 @@ module.exports = {
 		'filename': `${pkg.name}.js`,
 		'path': path.join(__dirname, 'lib')
 	},
-	'node': {
-		'Buffer': false
-	},
 	'devtool': 'source-map',
+	'node': {'Buffer': false},
 	'plugins': [
+		// Custom build of the Stanford Javascript Crypto Library (SJCL)
+		new webpack.NormalModuleReplacementPlugin(/^sjcl$/, function(result) {
+			const request = tmp.fileSync().name;
+
+			const root = path.join(__dirname, 'node_modules/sjcl');
+			const sources = [
+				'core/sjcl.js',
+				'core/bitArray.js',
+				'core/codecArrayBuffer.js',
+				'core/sha1.js',
+				'core/sha256.js',
+				'core/sha512.js',
+				'core/hmac.js',
+				'core/exports.js'
+			];
+
+			fs.writeFileSync(request, sources.reduce(function(code, file) {
+				return code + fs.readFileSync(path.join(root, file));
+			}, ''));
+
+			result.request = request;
+		}),
 		new ClosureCompilerPlugin({
 			'options': {
 				'warningLevel': 'QUIET',

package.json

@@ -36,9 +36,7 @@
   },
   "scripts": {
     "lint": "eslint --config .eslintrc.js .",
-    "build-otpauth": "webpack --display-reasons --config .webpack.js",
-    "build-sjcl": "node .sjcl.js",
-    "build": "run-s build-sjcl build-otpauth",
+    "build": "webpack --display-reasons --config .webpack.js",
     "test-browser": "karma start .karma.js",
     "test-node": "mocha --reporter dot",
     "test": "run-s test-node test-browser",
@@ -60,6 +58,7 @@
     "karma-phantomjs-launcher": "latest",
     "mocha": "latest",
     "npm-run-all": "latest",
-    "rimraf": "latest"
+    "rimraf": "latest",
+    "tmp": "latest"
   }
 }

src/Crypto.js

@@ -1,4 +1,4 @@
-import sjcl from './.sjcl.custom.js';
+import sjcl from 'sjcl';
 
 /**
  * An object containing some cryptography functions