all: imp code

internal/cmd/proxy.go

@@ -42,8 +42,7 @@ func createProxyConfig(
 
 	hosts, err := handler.ReadHosts(hostsFiles)
 	if err != nil {
-		// Don't wrap the error since it's informative enough as is.
-		return nil, err
+		return nil, fmt.Errorf("reading hosts files: %w", err)
 	}
 
 	reqHdlr := handler.NewDefault(&handler.DefaultConfig{

internal/handler/default.go

@@ -1,5 +1,3 @@
-// Package handler provides some customizable DNS request handling logic used in
-// the proxy.
 package handler
 
 import (

internal/handler/handler.go

@@ -0,0 +1,3 @@
+// Package handler provides some customizable DNS request handling logic used in
+// the proxy.
+package handler

internal/handler/hosts.go

@@ -68,6 +68,7 @@ func readHostsFile(strg *hostsfile.DefaultStorage, path string) (err error) {
 	// #nosec G304 -- Trust the file path from the configuration file.
 	f, err := os.Open(path)
 	if err != nil {
+		// Don't wrap the error since it's informative enough as is.
 		return err
 	}