forked from purpleidea/mgmt
/
home.go
55 lines (49 loc) · 1.69 KB
/
home.go
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// Mgmt
// Copyright (C) 2013-2018+ James Shubin and the project contributors
// Written by James Shubin <james@shubin.ca> and the project contributors
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package util
import (
"fmt"
"os/user"
"path"
"regexp"
"strings"
errwrap "github.com/pkg/errors"
)
// ExpandHome does an expansion of ~/ or ~james/ into user's home dir value.
func ExpandHome(p string) (string, error) {
if strings.HasPrefix(p, "~/") {
usr, err := user.Current()
if err != nil {
return p, fmt.Errorf("can't expand ~ into home directory")
}
return path.Join(usr.HomeDir, p[len("~/"):]), nil
}
// check if provided path is in format ~username and keep track of provided username
r, err := regexp.Compile("~([^/]+)/")
if err != nil {
return p, errwrap.Wrapf(err, "can't compile regexp")
}
if match := r.FindStringSubmatch(p); match != nil {
username := match[len(match)-1]
usr, err := user.Lookup(username)
if err != nil {
return p, fmt.Errorf("can't expand %s into home directory", match[0])
}
return path.Join(usr.HomeDir, p[len(match[0]):]), nil
}
return p, nil
}