[XYZ-6] Add sampledata platform command (#8027)

* Add fake dependency

* [XYZ-6] Add sampledata platform command

* Creating EMOJI_NAME_MAX_LENGTH as a constant and using it where needed

vendor/github.com/minio/go-homedir/README.md

@@ -13,4 +13,4 @@ it has a cgo dependency on Darwin systems. This means that any Go code
 that uses that package cannot cross compile. But 99% of the time the
 use for `os/user` is just to retrieve the home directory, which we can
 do for the current user without cgo. This library does that, enabling
-cross-compilation. 
+cross-compilation.

vendor/github.com/minio/go-homedir/dir_posix.go

@@ -1,8 +1,5 @@
 // +build !windows
 
-// Copyright 2016 (C) Mitchell Hashimoto
-// Distributed under the MIT License.
-
 package homedir
 
 import (

vendor/github.com/minio/go-homedir/dir_windows.go

@@ -1,6 +1,3 @@
-// Copyright 2016 (C) Mitchell Hashimoto
-// Distributed under the MIT License.
-
 package homedir
 
 import (

vendor/github.com/minio/go-homedir/homedir.go

@@ -1,6 +1,3 @@
-// Copyright 2016 (C) Mitchell Hashimoto
-// Distributed under the MIT License.
-
 // Package homedir implements a portable function to determine current user's homedir.
 package homedir
 
@@ -15,23 +12,25 @@ import (
 var DisableCache bool
 
 var homedirCache string
-var cacheLock sync.Mutex
+var cacheLock sync.RWMutex
 
 // Dir returns the home directory for the executing user.
 //
 // This uses an OS-specific method for discovering the home directory.
 // An error is returned if a home directory cannot be detected.
 func Dir() (string, error) {
-	cacheLock.Lock()
-	defer cacheLock.Unlock()
-
-	// Return cached homedir if available.
 	if !DisableCache {
-		if homedirCache != "" {
-			return homedirCache, nil
+		cacheLock.RLock()
+		cached := homedirCache
+		cacheLock.RUnlock()
+		if cached != "" {
+			return cached, nil
 		}
 	}
 
+	cacheLock.Lock()
+	defer cacheLock.Unlock()
+
 	// Determine OS speific current homedir.
 	result, err := dir()
 	if err != nil {