mirror of https://github.com/k3d-io/k3d
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
4.3 KiB
143 lines
4.3 KiB
1 year ago
|
// Copyright 2018 Google LLC All Rights Reserved.
|
||
|
//
|
||
|
// 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 crane
|
||
|
|
||
|
import (
|
||
|
"fmt"
|
||
|
"os"
|
||
|
|
||
|
legacy "github.com/google/go-containerregistry/pkg/legacy/tarball"
|
||
|
"github.com/google/go-containerregistry/pkg/name"
|
||
|
v1 "github.com/google/go-containerregistry/pkg/v1"
|
||
|
"github.com/google/go-containerregistry/pkg/v1/empty"
|
||
|
"github.com/google/go-containerregistry/pkg/v1/layout"
|
||
|
"github.com/google/go-containerregistry/pkg/v1/remote"
|
||
|
"github.com/google/go-containerregistry/pkg/v1/tarball"
|
||
|
)
|
||
|
|
||
|
// Tag applied to images that were pulled by digest. This denotes that the
|
||
|
// image was (probably) never tagged with this, but lets us avoid applying the
|
||
|
// ":latest" tag which might be misleading.
|
||
|
const iWasADigestTag = "i-was-a-digest"
|
||
|
|
||
|
// Pull returns a v1.Image of the remote image src.
|
||
|
func Pull(src string, opt ...Option) (v1.Image, error) {
|
||
|
o := makeOptions(opt...)
|
||
|
ref, err := name.ParseReference(src, o.Name...)
|
||
|
if err != nil {
|
||
|
return nil, fmt.Errorf("parsing reference %q: %w", src, err)
|
||
|
}
|
||
|
|
||
|
return remote.Image(ref, o.Remote...)
|
||
|
}
|
||
|
|
||
|
// Save writes the v1.Image img as a tarball at path with tag src.
|
||
|
func Save(img v1.Image, src, path string) error {
|
||
|
imgMap := map[string]v1.Image{src: img}
|
||
|
return MultiSave(imgMap, path)
|
||
|
}
|
||
|
|
||
|
// MultiSave writes collection of v1.Image img with tag as a tarball.
|
||
|
func MultiSave(imgMap map[string]v1.Image, path string, opt ...Option) error {
|
||
|
o := makeOptions(opt...)
|
||
|
tagToImage := map[name.Tag]v1.Image{}
|
||
|
|
||
|
for src, img := range imgMap {
|
||
|
ref, err := name.ParseReference(src, o.Name...)
|
||
|
if err != nil {
|
||
|
return fmt.Errorf("parsing ref %q: %w", src, err)
|
||
|
}
|
||
|
|
||
|
// WriteToFile wants a tag to write to the tarball, but we might have
|
||
|
// been given a digest.
|
||
|
// If the original ref was a tag, use that. Otherwise, if it was a
|
||
|
// digest, tag the image with :i-was-a-digest instead.
|
||
|
tag, ok := ref.(name.Tag)
|
||
|
if !ok {
|
||
|
d, ok := ref.(name.Digest)
|
||
|
if !ok {
|
||
|
return fmt.Errorf("ref wasn't a tag or digest")
|
||
|
}
|
||
|
tag = d.Repository.Tag(iWasADigestTag)
|
||
|
}
|
||
|
tagToImage[tag] = img
|
||
|
}
|
||
|
// no progress channel (for now)
|
||
|
return tarball.MultiWriteToFile(path, tagToImage)
|
||
|
}
|
||
|
|
||
|
// PullLayer returns the given layer from a registry.
|
||
|
func PullLayer(ref string, opt ...Option) (v1.Layer, error) {
|
||
|
o := makeOptions(opt...)
|
||
|
digest, err := name.NewDigest(ref, o.Name...)
|
||
|
if err != nil {
|
||
|
return nil, err
|
||
|
}
|
||
|
|
||
|
return remote.Layer(digest, o.Remote...)
|
||
|
}
|
||
|
|
||
|
// SaveLegacy writes the v1.Image img as a legacy tarball at path with tag src.
|
||
|
func SaveLegacy(img v1.Image, src, path string) error {
|
||
|
imgMap := map[string]v1.Image{src: img}
|
||
|
return MultiSave(imgMap, path)
|
||
|
}
|
||
|
|
||
|
// MultiSaveLegacy writes collection of v1.Image img with tag as a legacy tarball.
|
||
|
func MultiSaveLegacy(imgMap map[string]v1.Image, path string) error {
|
||
|
refToImage := map[name.Reference]v1.Image{}
|
||
|
|
||
|
for src, img := range imgMap {
|
||
|
ref, err := name.ParseReference(src)
|
||
|
if err != nil {
|
||
|
return fmt.Errorf("parsing ref %q: %w", src, err)
|
||
|
}
|
||
|
refToImage[ref] = img
|
||
|
}
|
||
|
|
||
|
w, err := os.Create(path)
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
defer w.Close()
|
||
|
|
||
|
return legacy.MultiWrite(refToImage, w)
|
||
|
}
|
||
|
|
||
|
// SaveOCI writes the v1.Image img as an OCI Image Layout at path. If a layout
|
||
|
// already exists at that path, it will add the image to the index.
|
||
|
func SaveOCI(img v1.Image, path string) error {
|
||
|
imgMap := map[string]v1.Image{"": img}
|
||
|
return MultiSaveOCI(imgMap, path)
|
||
|
}
|
||
|
|
||
|
// MultiSaveOCI writes collection of v1.Image img as an OCI Image Layout at path. If a layout
|
||
|
// already exists at that path, it will add the image to the index.
|
||
|
func MultiSaveOCI(imgMap map[string]v1.Image, path string) error {
|
||
|
p, err := layout.FromPath(path)
|
||
|
if err != nil {
|
||
|
p, err = layout.Write(path, empty.Index)
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
}
|
||
|
for _, img := range imgMap {
|
||
|
if err = p.AppendImage(img); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
}
|
||
|
return nil
|
||
|
}
|