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// Copyright 2020 Northern.tech AS
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package artifact
import (
"archive/tar"
"encoding/json"
"github.com/pkg/errors"
)
func ToStream(m WriteValidator) ([]byte, error) {
if err := m.Validate(); err != nil {
return nil, errors.Wrapf(err, "ToStream: Failed to validate: %T", m)
}
data, err := json.Marshal(m)
if err != nil {
return nil, errors.Wrapf(err, "ToStream: Failed to marshal json for %T", m)
}
return data, nil
}
type StreamArchiver struct {
*tar.Writer
}
func NewTarWriterStream(w *tar.Writer) *StreamArchiver {
return &StreamArchiver{
Writer: w,
}
}
func (str *StreamArchiver) Write(data []byte, archivePath string) error {
if str.Writer == nil {
return errors.New("arch: Can not write to empty tar-writer")
}
hdr := &tar.Header{
Name: archivePath,
Mode: 0600,
Size: int64(len(data)),
}
if err := str.Writer.WriteHeader(hdr); err != nil {
return errors.Wrapf(err, "arch: can not write stream header")
}
_, err := str.Writer.Write(data)
if err != nil {
return errors.Wrapf(err, "arch: can not write stream data")
}
return nil
}
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