5e2d7efd82
Remove annotation prefix and add multiple index records for manifests with multiple image names. This makes the custom annotation more consistent with the OCI image annotation. Additionally, ensure the OCI image annotation always represents the tag (partial image name) as recommended by the specification. The containerd image name annotation will always contain the full image name. Signed-off-by: Derek McGowan <derek@mcgstyle.net>
113 lines
3.1 KiB
Go
113 lines
3.1 KiB
Go
/*
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Copyright The containerd Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package archive
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import (
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"strings"
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"github.com/containerd/containerd/reference"
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distref "github.com/docker/distribution/reference"
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"github.com/opencontainers/go-digest"
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"github.com/pkg/errors"
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)
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// FilterRefPrefix restricts references to having the given image
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// prefix. Tag-only references will have the prefix prepended.
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func FilterRefPrefix(image string) func(string) string {
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return refTranslator(image, true)
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}
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// AddRefPrefix prepends the given image prefix to tag-only references,
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// while leaving returning full references unmodified.
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func AddRefPrefix(image string) func(string) string {
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return refTranslator(image, false)
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}
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// refTranslator creates a reference which only has a tag or verifies
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// a full reference.
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func refTranslator(image string, checkPrefix bool) func(string) string {
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return func(ref string) string {
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// Check if ref is full reference
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if strings.ContainsAny(ref, "/:@") {
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// If not prefixed, don't include image
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if checkPrefix && !isImagePrefix(ref, image) {
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return ""
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}
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return ref
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}
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return image + ":" + ref
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}
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}
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func isImagePrefix(s, prefix string) bool {
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if !strings.HasPrefix(s, prefix) {
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return false
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}
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if len(s) > len(prefix) {
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switch s[len(prefix)] {
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case '/', ':', '@':
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// Prevent matching partial namespaces
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default:
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return false
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}
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}
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return true
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}
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func normalizeReference(ref string) (string, error) {
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// TODO: Replace this function to not depend on reference package
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normalized, err := distref.ParseDockerRef(ref)
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if err != nil {
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return "", errors.Wrapf(err, "normalize image ref %q", ref)
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}
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return normalized.String(), nil
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}
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func familiarizeReference(ref string) (string, error) {
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named, err := distref.ParseNormalizedNamed(ref)
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if err != nil {
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return "", errors.Wrapf(err, "failed to parse %q", ref)
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}
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named = distref.TagNameOnly(named)
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return distref.FamiliarString(named), nil
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}
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func ociReferenceName(name string) string {
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// OCI defines the reference name as only a tag excluding the
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// repository. The containerd annotation contains the full image name
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// since the tag is insufficent for correctly naming and referring to an
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// image
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var ociRef string
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if spec, err := reference.Parse(name); err == nil {
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ociRef = spec.Object
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} else {
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ociRef = name
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}
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return ociRef
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}
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// DigestTranslator creates a digest reference by adding the
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// digest to an image name
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func DigestTranslator(prefix string) func(digest.Digest) string {
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return func(dgst digest.Digest) string {
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return prefix + "@" + dgst.String()
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}
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}
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