golang path 代码
文件路径：/src/cmd/go/internal/load/path.go
/ Copyright 2017 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package load
import (
"path/filepath"
)
/ expandPath returns the symlink-expanded form of path.
func expandPath(p string) string {
x, err := filepath.EvalSymlinks(p)
if err == nil {
return x
}
return p
}