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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016 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 osutil
import (
"bytes"
"fmt"
)
// OutputErr formats an error based on output if its length is not zero,
// or returns err otherwise.
func OutputErr(output []byte, err error) error {
output = bytes.TrimSpace(output)
if len(output) > 0 {
if bytes.Contains(output, []byte{'\n'}) {
err = fmt.Errorf("\n-----\n%s\n-----", output)
} else {
err = fmt.Errorf("%s", output)
}
}
return err
}
// CombineStdOutErr combines stdout and stderr byte arrays into a
// single one.
func CombineStdOutErr(stdout, stderr []byte) []byte {
msg := stdout
if stderr != nil && len(stderr) > 0 {
msg = bytes.Join([][]byte{stdout, stderr}, []byte("\nstderr:\n"))
}
msg = bytes.TrimSpace(msg)
return msg
}
// OutputErr formats an error based on output if its length is not zero,
// or returns err otherwise.
func OutputErrCombine(stdout, stderr []byte, err error) error {
msg := CombineStdOutErr(stdout, stderr)
return OutputErr(msg, err)
}
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