From 7ef1bccfec4a1ddc370b727791cb3da69eb71c52 Mon Sep 17 00:00:00 2001
From: Emily Giurleo <e.m.giurleo@gmail.com>
Date: Tue, 2 Jul 2019 18:31:53 -0400
Subject: [PATCH 1/3] replace fs promises api with utils.promisify

---
 src/adapters/fsFileSystem.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/adapters/fsFileSystem.ts b/src/adapters/fsFileSystem.ts
index 0eb448a56..63bf5e622 100644
--- a/src/adapters/fsFileSystem.ts
+++ b/src/adapters/fsFileSystem.ts
@@ -1,4 +1,5 @@
 import * as fs from "fs";
+import { promisify } from "util";
 
 import { FileSystem } from "./fileSystem";
 
@@ -12,7 +13,8 @@ export const fsFileSystem: FileSystem = {
     },
     readFile: async (filePath: string) => {
         try {
-            return (await fs.promises.readFile(filePath)).toString();
+            const readFile = promisify(fs.readFile);
+            return (await readFile(filePath)).toString();
         } catch (error) {
             return error;
         }

From 0620e729b8d9490f406659afd4ca54403721226e Mon Sep 17 00:00:00 2001
From: Emily Giurleo <e.m.giurleo@gmail.com>
Date: Tue, 2 Jul 2019 18:45:34 -0400
Subject: [PATCH 2/3] move line to top of file

---
 src/adapters/fsFileSystem.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/adapters/fsFileSystem.ts b/src/adapters/fsFileSystem.ts
index 63bf5e622..dd01026da 100644
--- a/src/adapters/fsFileSystem.ts
+++ b/src/adapters/fsFileSystem.ts
@@ -3,6 +3,8 @@ import { promisify } from "util";
 
 import { FileSystem } from "./fileSystem";
 
+const readFile = promisify(fs.readFile);
+
 export const fsFileSystem: FileSystem = {
     fileExists: async (filePath: string) => {
         try {
@@ -13,7 +15,6 @@ export const fsFileSystem: FileSystem = {
     },
     readFile: async (filePath: string) => {
         try {
-            const readFile = promisify(fs.readFile);
             return (await readFile(filePath)).toString();
         } catch (error) {
             return error;

From db3e6aca12cc4b5d96b5cb557bac3681d70f101b Mon Sep 17 00:00:00 2001
From: Emily Giurleo <e.m.giurleo@gmail.com>
Date: Wed, 3 Jul 2019 08:11:13 -0400
Subject: [PATCH 3/3] promisify writeFile in fsFileSystem

---
 src/adapters/fsFileSystem.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/adapters/fsFileSystem.ts b/src/adapters/fsFileSystem.ts
index dd01026da..9740bcde9 100644
--- a/src/adapters/fsFileSystem.ts
+++ b/src/adapters/fsFileSystem.ts
@@ -4,6 +4,7 @@ import { promisify } from "util";
 import { FileSystem } from "./fileSystem";
 
 const readFile = promisify(fs.readFile);
+const writeFile = promisify(fs.writeFile);
 
 export const fsFileSystem: FileSystem = {
     fileExists: async (filePath: string) => {
@@ -22,7 +23,7 @@ export const fsFileSystem: FileSystem = {
     },
     writeFile: async (filePath: string, contents: string) => {
         try {
-            return fs.promises.writeFile(filePath, contents);
+            return writeFile(filePath, contents);
         } catch (error) {
             return error;
         }