From 30adee935c66d310abd1c8b082de298320fa664a Mon Sep 17 00:00:00 2001
From: Guillermo Rauch <rauchg@gmail.com>
Date: Fri, 26 Feb 2016 14:40:04 -0800
Subject: [PATCH] use graceful-fs to avoid EMFILE for large projects

---
 lib/get-files.js   | 18 ++++++++++--------
 lib/graceful-fs.js |  5 +++++
 lib/hash.js        |  4 ++--
 package.json       |  2 ++
 4 files changed, 19 insertions(+), 10 deletions(-)
 create mode 100644 lib/graceful-fs.js

diff --git a/lib/get-files.js b/lib/get-files.js
index 3733353..eaca3c2 100644
--- a/lib/get-files.js
+++ b/lib/get-files.js
@@ -1,4 +1,5 @@
-import fs, { readFile as read } from 'fs-promise';
+import { stat } from 'fs-promise';
+import { readdir, readFile } from './graceful-fs';
 import { resolve } from 'path';
 import flatten from 'arr-flatten';
 import unique from 'array-unique';
@@ -16,7 +17,8 @@ import IGNORED from './ignored';
 
 export default async function getFiles (path, pkg) {
   if (!pkg) {
-    const pkgData = await read(resolve(path, 'package.json'), 'utf8');
+    const pkgPath = resolve(path, 'package.json');
+    const pkgData = await readFile(pkgPath, 'utf8');
     pkg = JSON.parse(pkgData);
   }
 
@@ -103,19 +105,19 @@ const explode = async function (paths) {
 
   const list = async (file) => {
     let path = file;
-    let stat;
+    let s;
 
     try {
-      stat = await fs.stat(path);
+      s = await stat(path);
     } catch (e) {
       // in case the file comes from `files` or `main`
       // and it wasn't specified with `.js` by the user
       path = file + '.js';
-      stat = await fs.stat(path);
+      s = await stat(path);
     }
 
-    if (stat.isDirectory()) {
-      const all = await fs.readdir(file);
+    if (s.isDirectory()) {
+      const all = await readdir(file);
       return many(all.map(subdir => asAbsolute(subdir, file)));
     } else {
       return path;
@@ -133,7 +135,7 @@ const explode = async function (paths) {
 
 const maybeRead = async function (path) {
   try {
-    return (await fs.readFile(path, 'utf8'));
+    return (await readFile(path, 'utf8'));
   } catch (e) {
     return '';
   }
diff --git a/lib/graceful-fs.js b/lib/graceful-fs.js
new file mode 100644
index 0000000..8963d53
--- /dev/null
+++ b/lib/graceful-fs.js
@@ -0,0 +1,5 @@
+import fs from 'graceful-fs';
+import promisify from 'es6-promisify';
+
+export const readdir = promisify(fs.readdir);
+export const readdir = promisify(fs.);
diff --git a/lib/hash.js b/lib/hash.js
index 176d104..dc4e89f 100644
--- a/lib/hash.js
+++ b/lib/hash.js
@@ -1,4 +1,4 @@
-import fs from 'fs-promise';
+import { readFile } from './graceful-fs';
 import { createHash } from 'crypto';
 
 /**
@@ -10,7 +10,7 @@ import { createHash } from 'crypto';
 
 export default async function hashes (files) {
   const entries = await Promise.all(files.map(async (file) => {
-    const data = await fs.readFile(file);
+    const data = await readFile(file);
     return [hash(data), file];
   }));
   return new Map(entries);
diff --git a/package.json b/package.json
index 99335ae..3929f8b 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,9 @@
     "chalk": "1.1.1",
     "commander": "2.9.0",
     "copy-paste": "1.1.4",
+    "es6-promisify": "3.0.0",
     "fs-promise": "0.4.1",
+    "graceful-fs": "4.1.3",
     "ms": "0.7.1",
     "node-fetch": "1.3.3",
     "spdy": "3.2.0"