68 lines
2.4 KiB
Go
68 lines
2.4 KiB
Go
// Mgmt
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// Copyright (C) 2013-2024+ James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// Additional permission under GNU GPL version 3 section 7
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//
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// If you modify this program, or any covered work, by linking or combining it
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// with embedded mcl code and modules (and that the embedded mcl code and
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// modules which link with this program, contain a copy of their source code in
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// the authoritative form) containing parts covered by the terms of any other
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// license, the licensors of this program grant you additional permission to
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// convey the resulting work. Furthermore, the licensors of this program grant
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// the original author, James Shubin, additional permission to update this
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// additional permission if he deems it necessary to achieve the goals of this
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// additional permission.
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package util
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import (
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"fmt"
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"os/user"
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"path"
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"regexp"
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"strings"
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"github.com/purpleidea/mgmt/util/errwrap"
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)
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// ExpandHome does an expansion of ~/ or ~james/ into user's home dir value.
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func ExpandHome(p string) (string, error) {
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if strings.HasPrefix(p, "~/") {
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usr, err := user.Current()
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if err != nil {
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return p, fmt.Errorf("can't expand ~ into home directory")
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}
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return path.Join(usr.HomeDir, p[len("~/"):]), nil
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}
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// check if provided path is in format ~username and keep track of provided username
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r, err := regexp.Compile("~([^/]+)/")
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if err != nil {
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return p, errwrap.Wrapf(err, "can't compile regexp")
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}
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if match := r.FindStringSubmatch(p); match != nil {
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username := match[len(match)-1]
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usr, err := user.Lookup(username)
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if err != nil {
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return p, fmt.Errorf("can't expand %s into home directory", match[0])
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}
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return path.Join(usr.HomeDir, p[len(match[0]):]), nil
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}
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return p, nil
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}
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