werf/trdl

package util

import (
    "os/user"
    "path/filepath"
    "strings"
)

func ExpandPath(path string) (string, error) {
    var result string
    if strings.HasPrefix(path, "~") {
        usr, err := user.Current()
        if err != nil {
            return "", err
        }

        dir := usr.HomeDir
        if path == "~" {
            result = dir
        } else {
            result = filepath.Join(dir, path[2:])
        }
    } else {
        var err error
        result, err = filepath.Abs(path)
        if err != nil {
            return "", err
        }
    }

    return result, nil
}