mirror of
https://github.com/mudler/luet.git
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62 lines
1.7 KiB
Go
62 lines
1.7 KiB
Go
// Copyright 2018 Google LLC All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package daemon
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import (
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"fmt"
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"io"
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"io/ioutil"
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"github.com/google/go-containerregistry/pkg/name"
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v1 "github.com/google/go-containerregistry/pkg/v1"
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"github.com/google/go-containerregistry/pkg/v1/tarball"
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)
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// Tag adds a tag to an already existent image.
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func Tag(src, dest name.Tag, options ...Option) error {
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o, err := makeOptions(options...)
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if err != nil {
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return err
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}
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return o.client.ImageTag(o.ctx, src.String(), dest.String())
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}
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// Write saves the image into the daemon as the given tag.
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func Write(tag name.Tag, img v1.Image, options ...Option) (string, error) {
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o, err := makeOptions(options...)
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if err != nil {
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return "", err
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}
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pr, pw := io.Pipe()
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go func() {
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pw.CloseWithError(tarball.Write(tag, img, pw))
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}()
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// write the image in docker save format first, then load it
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resp, err := o.client.ImageLoad(o.ctx, pr, false)
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if err != nil {
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return "", fmt.Errorf("error loading image: %v", err)
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}
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defer resp.Body.Close()
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b, err := ioutil.ReadAll(resp.Body)
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response := string(b)
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if err != nil {
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return response, fmt.Errorf("error reading load response body: %v", err)
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}
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return response, nil
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}
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