From 4c1bf413c76fa7c62036574fc8f8f5e15704c3e6 Mon Sep 17 00:00:00 2001
From: Nico Jansen <jansennico@gmail.com>
Date: Thu, 26 Jan 2017 17:41:25 +0100
Subject: [PATCH] fix(fs): Use graceful-fs instead of fs directly (#221)

Prevent `'EMFILE'` errors amongst others by using graceful-fs as a drop-in replacement for file system IO.
---
 package.json                            | 2 ++
 src/PluginLoader.ts                     | 2 +-
 src/utils/StrykerTempFolder.ts          | 4 ++--
 src/utils/fileUtils.ts                  | 8 +++-----
 test/integration/utils/fileUtilsSpec.ts | 2 +-
 test/unit/PluginLoaderSpec.ts           | 8 ++++----
 6 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/package.json b/package.json
index 7f1b804516..10fc50c4f6 100644
--- a/package.json
+++ b/package.json
@@ -48,6 +48,7 @@
     "escodegen": "^1.8.0",
     "esprima": "^2.7.0",
     "glob": "^7.0.3",
+    "graceful-fs": "^4.1.11",
     "istanbul": "^0.4.5",
     "lodash": "^3.10.1",
     "log4js": "^0.6.33",
@@ -62,6 +63,7 @@
     "@types/esprima": "^2.1.31",
     "@types/estree": "0.0.32",
     "@types/glob": "^5.0.29",
+    "@types/graceful-fs": "^2.0.29",
     "@types/istanbul": "^0.4.29",
     "@types/karma": "^0.13.32",
     "@types/lodash": "^4.14.34",
diff --git a/src/PluginLoader.ts b/src/PluginLoader.ts
index 79732023e6..71529c8f68 100644
--- a/src/PluginLoader.ts
+++ b/src/PluginLoader.ts
@@ -1,4 +1,4 @@
-import * as fs from 'fs';
+import * as fs from 'graceful-fs';
 import * as path from 'path';
 import * as log4js from 'log4js';
 import * as _ from 'lodash';
diff --git a/src/utils/StrykerTempFolder.ts b/src/utils/StrykerTempFolder.ts
index ed231c9018..9770707256 100644
--- a/src/utils/StrykerTempFolder.ts
+++ b/src/utils/StrykerTempFolder.ts
@@ -1,5 +1,5 @@
 import * as os from 'os';
-import * as fs from 'fs';
+import * as fs from 'graceful-fs';
 import * as path from 'path';
 import * as mkdirp from 'mkdirp';
 import * as fileUtils from './fileUtils';
@@ -77,7 +77,7 @@ function writeFile(filename: string, data: string): Promise<void> {
  * Copies a file.
  * @param fromFilename The path to the existing file.
  * @param toFilename The path to copy the file to.
- * @param instrumenter An optional additional intrumenter to stream the file through
+ * @param instrumenter An optional additional instrumenter to stream the file through
  * @returns A promise to eventually copy the file.
  */
 function copyFile(fromFilename: string, toFilename: string, instrumenter?: NodeJS.ReadWriteStream): Promise<void> {
diff --git a/src/utils/fileUtils.ts b/src/utils/fileUtils.ts
index 21e04636e7..022d5a89b7 100644
--- a/src/utils/fileUtils.ts
+++ b/src/utils/fileUtils.ts
@@ -1,9 +1,7 @@
-'use strict';
-
+import * as path from 'path';
+import * as os from 'os';
+import * as fs from 'graceful-fs';
 import * as _ from 'lodash';
-import fs = require('fs');
-import os = require('os');
-import path = require('path');
 import * as nodeGlob from 'glob';
 import * as mkdirp from 'mkdirp';
 
diff --git a/test/integration/utils/fileUtilsSpec.ts b/test/integration/utils/fileUtilsSpec.ts
index a867b7fcd1..1210f41037 100644
--- a/test/integration/utils/fileUtilsSpec.ts
+++ b/test/integration/utils/fileUtilsSpec.ts
@@ -1,4 +1,4 @@
-import * as fs from 'fs';
+import * as fs from 'graceful-fs';
 import { expect } from 'chai';
 import * as sinon from 'sinon';
 import * as fileUtils from '../../../src/utils/fileUtils';
diff --git a/test/unit/PluginLoaderSpec.ts b/test/unit/PluginLoaderSpec.ts
index d43ab064e1..c9266ec9cf 100644
--- a/test/unit/PluginLoaderSpec.ts
+++ b/test/unit/PluginLoaderSpec.ts
@@ -1,10 +1,10 @@
-import PluginLoader from '../../src/PluginLoader';
-import {expect} from 'chai';
+import * as path from 'path';
+import * as fs from 'graceful-fs';
 import * as sinon from 'sinon';
+import { expect } from 'chai';
 import * as fileUtils from '../../src/utils/fileUtils';
+import PluginLoader from '../../src/PluginLoader';
 import log from '../helpers/log4jsMock';
-import * as fs from 'fs';
-import * as path from 'path';
 
 describe('PluginLoader', () => {
   let sut: PluginLoader;