Fix getCAROOT switch statement

README.md

@@ -54,7 +54,7 @@ $(go env GOPATH)/bin/mkcert
 
 Windows will be supported next. (PRs welcome!)
 
-Warning: the `rootCA-key.pem` file that mkcert automatically generates gives complete power to intercept secure requests from your machine. Do not share it.
+> **Warning**: the `rootCA-key.pem` file that mkcert automatically generates gives complete power to intercept secure requests from your machine. Do not share it.
 
 ## Advanced topics
 

main.go

@@ -137,24 +137,23 @@ func getCAROOT() string {
 	}
 
 	var dir string
-	switch runtime.GOOS {
-	case "windows":
+	switch {
+	case runtime.GOOS == "windows":
 		dir = os.Getenv("LocalAppData")
-	case "darwin":
+	case os.Getenv("XDG_DATA_HOME") != "":
+		dir = os.Getenv("XDG_DATA_HOME")
+	case runtime.GOOS == "darwin":
 		dir = os.Getenv("HOME")
 		if dir == "" {
 			return ""
 		}
 		dir = filepath.Join(dir, "Library", "Application Support")
 	default: // Unix
-		dir = os.Getenv("XDG_DATA_HOME")
+		dir = os.Getenv("HOME")
 		if dir == "" {
-			dir = os.Getenv("HOME")
-			if dir == "" {
-				return ""
-			}
-			dir = filepath.Join(dir, ".local", "share")
+			return ""
 		}
+		dir = filepath.Join(dir, ".local", "share")
 	}
 	return filepath.Join(dir, "mkcert")
 }