From 9e1af7d14d1ec2702ebb516df48735d5d38c5b30 Mon Sep 17 00:00:00 2001
From: Gareth Jones <jones258@gmail.com>
Date: Wed, 1 May 2019 17:26:33 +1200
Subject: [PATCH 1/3] =?UTF-8?q?fix:=20=F0=9F=90=9B=20accept=20`null`=20as?=
 =?UTF-8?q?=20value=20in=20`fromJSON`=20functions?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/volume.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/volume.ts b/src/volume.ts
index 3c377c5f5..383ecb993 100644
--- a/src/volume.ts
+++ b/src/volume.ts
@@ -518,11 +518,13 @@ function validateGid(gid: number) {
 
 let promisesWarn = !process.env.MEMFS_DONT_WARN;
 
+type DirectoryJSON = Record<string, string | null>;
+
 /**
  * `Volume` represents a file system.
  */
 export class Volume {
-  static fromJSON(json: { [filename: string]: string }, cwd?: string): Volume {
+  static fromJSON(json: DirectoryJSON, cwd?: string): Volume {
     const vol = new Volume();
     vol.fromJSON(json, cwd);
     return vol;
@@ -855,7 +857,7 @@ export class Volume {
   }
 
   // fromJSON(json: {[filename: string]: string}, cwd: string = '/') {
-  fromJSON(json: { [filename: string]: string }, cwd: string = process.cwd()) {
+  fromJSON(json: DirectoryJSON, cwd: string = process.cwd()) {
     for (let filename in json) {
       const data = json[filename];
 
@@ -886,7 +888,7 @@ export class Volume {
   }
 
   // Legacy interface
-  mountSync(mountpoint: string, json: { [filename: string]: string }) {
+  mountSync(mountpoint: string, json: DirectoryJSON) {
     this.fromJSON(json, mountpoint);
   }
 

From 66098408fc4245c01f72f033bdc7d8a6b2fc4480 Mon Sep 17 00:00:00 2001
From: Gareth Jones <jones258@gmail.com>
Date: Thu, 2 May 2019 10:24:49 +1200
Subject: [PATCH 2/3] =?UTF-8?q?fix:=20=F0=9F=90=9B=20annotate=20return=20t?=
 =?UTF-8?q?ype=20of=20`toJSON`=20functions?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/volume.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/volume.ts b/src/volume.ts
index 383ecb993..fa27a9351 100644
--- a/src/volume.ts
+++ b/src/volume.ts
@@ -808,7 +808,7 @@ export class Volume {
     });
   }
 
-  private _toJSON(link = this.root, json = {}, path?: string) {
+  private _toJSON(link = this.root, json = {}, path?: string): DirectoryJSON {
     let isEmpty = true;
 
     for (const name in link.children) {
@@ -836,7 +836,7 @@ export class Volume {
     return json;
   }
 
-  toJSON(paths?: TFilePath | TFilePath[], json = {}, isRelative = false) {
+  toJSON(paths?: TFilePath | TFilePath[], json = {}, isRelative = false): DirectoryJSON {
     const links: Link[] = [];
 
     if (paths) {

From 07d8ea1ea94f0c7c4758c65802c0acab85690096 Mon Sep 17 00:00:00 2001
From: Gareth Jones <jones258@gmail.com>
Date: Thu, 2 May 2019 10:53:38 +1200
Subject: [PATCH 3/3] chore: export `DirectoryJSON` type

---
 src/volume.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/volume.ts b/src/volume.ts
index fa27a9351..fe81fd6b7 100644
--- a/src/volume.ts
+++ b/src/volume.ts
@@ -518,7 +518,7 @@ function validateGid(gid: number) {
 
 let promisesWarn = !process.env.MEMFS_DONT_WARN;
 
-type DirectoryJSON = Record<string, string | null>;
+export type DirectoryJSON = Record<string, string | null>;
 
 /**
  * `Volume` represents a file system.