luet/pkg/helpers/docker.go

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// Copyright © 2021 Ettore Di Giacinto <mudler@mocaccino.org>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// 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 helpers
import (
"os"
"github.com/mudler/luet/pkg/helpers/imgworker"
"github.com/pkg/errors"
)
// DownloadAndExtractDockerImage is a re-adaption
// from genuinetools/img https://github.com/genuinetools/img/blob/54d0ca981c1260546d43961a538550eef55c87cf/pull.go
func DownloadAndExtractDockerImage(temp, image, dest string) (*imgworker.ListedImage, error) {
defer os.RemoveAll(temp)
c, err := imgworker.New(temp)
if err != nil {
return nil, errors.Wrapf(err, "failed creating client")
}
defer c.Close()
listedImage, err := c.Pull(image)
if err != nil {
return nil, errors.Wrapf(err, "failed listing images")
}
os.RemoveAll(dest)
err = c.Unpack(image, dest)
return listedImage, err
}