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// Copyright 2020 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package conf
import (
"strings"
"github.com/pkg/errors"
"gogs.io/gogs/internal/process"
)
// openSSHVersion returns string representation of OpenSSH version via command "ssh -V".
func openSSHVersion() (string, error) {
// NOTE: Somehow the version is printed to stderr.
_, stderr, err := process.Exec("conf.openSSHVersion", "ssh", "-V")
if err != nil {
return "", errors.Wrap(err, stderr)
}
// Trim unused information, see https://github.com/gogs/gogs/issues/4507#issuecomment-305150441.
v := strings.TrimRight(strings.Fields(stderr)[0], ",1234567890")
v = strings.TrimSuffix(strings.TrimPrefix(v, "OpenSSH_"), "p")
return v, nil
}
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