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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2024 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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 strutil
import (
"fmt"
)
// JoinErrors returns an error that wraps the given errors.
// Any nil error values are discarded.
// Join returns nil if every value in errs is nil.
//
// TODO: replace with errors.Join() once we're on golang v1.20+
//
// This is a lossy implementation of errors.Join, where only the first non-nil
// error is preserved in a state which can be unwrapped.
func JoinErrors(errs ...error) error {
var nonNilErrs []error
for _, e := range errs {
if e != nil {
nonNilErrs = append(nonNilErrs, e)
}
}
if len(nonNilErrs) == 0 {
return nil
}
err := nonNilErrs[0]
for _, e := range nonNilErrs[1:] {
err = fmt.Errorf("%w\n%v", err, e)
}
return err
}
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