common, node: move datadir defaults into package node

common/path.go

@@ -19,10 +19,8 @@ package common
 import (
 	"fmt"
 	"os"
-	"os/user"
 	"path/filepath"
 	"runtime"
-	"strings"
 )
 
 // MakeName creates a node name that follows the ethereum convention
@@ -32,21 +30,6 @@ func MakeName(name, version string) string {
 	return fmt.Sprintf("%s/v%s/%s/%s", name, version, runtime.GOOS, runtime.Version())
 }
 
-func ExpandHomePath(p string) (path string) {
-	path = p
-	sep := string(os.PathSeparator)
-
-	// Check in case of paths like "/something/~/something/"
-	if len(p) > 1 && p[:1+len(sep)] == "~"+sep {
-		usr, _ := user.Current()
-		dir := usr.HomeDir
-
-		path = strings.Replace(p, "~", dir, 1)
-	}
-
-	return
-}
-
 func FileExist(filePath string) bool {
 	_, err := os.Stat(filePath)
 	if err != nil && os.IsNotExist(err) {
@@ -62,13 +45,3 @@ func AbsolutePath(Datadir string, filename string) string {
 	}
 	return filepath.Join(Datadir, filename)
 }
-
-func HomeDir() string {
-	if home := os.Getenv("HOME"); home != "" {
-		return home
-	}
-	if usr, err := user.Current(); err == nil {
-		return usr.HomeDir
-	}
-	return ""
-}