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package registry
import (
"context"
"strconv"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/remotes/docker"
"github.com/containerd/containerd/snapshots"
"github.com/distribution/reference"
"github.com/moby/buildkit/cache/remotecache"
"github.com/moby/buildkit/session"
"github.com/moby/buildkit/util/compression"
"github.com/moby/buildkit/util/contentutil"
"github.com/moby/buildkit/util/estargz"
"github.com/moby/buildkit/util/push"
"github.com/moby/buildkit/util/resolver"
resolverconfig "github.com/moby/buildkit/util/resolver/config"
"github.com/moby/buildkit/util/resolver/limited"
digest "github.com/opencontainers/go-digest"
ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
func canonicalizeRef(rawRef string) (reference.Named, error) {
if rawRef == "" {
return nil, errors.New("missing ref")
}
parsed, err := reference.ParseNormalizedNamed(rawRef)
if err != nil {
return nil, err
}
parsed = reference.TagNameOnly(parsed)
return parsed, nil
}
const (
attrRef = "ref"
attrImageManifest = "image-manifest"
attrOCIMediatypes = "oci-mediatypes"
attrInsecure = "registry.insecure"
)
type exporter struct {
remotecache.Exporter
}
func (*exporter) Name() string {
return "exporting cache to registry"
}
func ResolveCacheExporterFunc(sm *session.Manager, hosts docker.RegistryHosts) remotecache.ResolveCacheExporterFunc {
return func(ctx context.Context, g session.Group, attrs map[string]string) (remotecache.Exporter, error) {
compressionConfig, err := compression.ParseAttributes(attrs)
if err != nil {
return nil, err
}
ref, err := canonicalizeRef(attrs[attrRef])
if err != nil {
return nil, err
}
refString := ref.String()
ociMediatypes := true
if v, ok := attrs[attrOCIMediatypes]; ok {
b, err := strconv.ParseBool(v)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse %s", attrOCIMediatypes)
}
ociMediatypes = b
}
imageManifest := false
if v, ok := attrs[attrImageManifest]; ok {
b, err := strconv.ParseBool(v)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse %s", attrImageManifest)
}
imageManifest = b
}
insecure := false
if v, ok := attrs[attrInsecure]; ok {
b, err := strconv.ParseBool(v)
if err != nil {
return nil, errors.Wrapf(err, "failed to parse %s", attrInsecure)
}
insecure = b
}
scope, hosts := registryConfig(hosts, ref, "push", insecure)
remote := resolver.DefaultPool.GetResolver(hosts, refString, scope, sm, g)
pusher, err := push.Pusher(ctx, remote, refString)
if err != nil {
return nil, err
}
return &exporter{remotecache.NewExporter(contentutil.FromPusher(pusher), refString, ociMediatypes, imageManifest, compressionConfig)}, nil
}
}
func ResolveCacheImporterFunc(sm *session.Manager, cs content.Store, hosts docker.RegistryHosts) remotecache.ResolveCacheImporterFunc {
return func(ctx context.Context, g session.Group, attrs map[string]string) (remotecache.Importer, ocispecs.Descriptor, error) {
ref, err := canonicalizeRef(attrs[attrRef])
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
refString := ref.String()
insecure := false
if v, ok := attrs[attrInsecure]; ok {
b, err := strconv.ParseBool(v)
if err != nil {
return nil, ocispecs.Descriptor{}, errors.Wrapf(err, "failed to parse %s", attrInsecure)
}
insecure = b
}
scope, hosts := registryConfig(hosts, ref, "pull", insecure)
remote := resolver.DefaultPool.GetResolver(hosts, refString, scope, sm, g)
xref, desc, err := remote.Resolve(ctx, refString)
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
fetcher, err := remote.Fetcher(ctx, xref)
if err != nil {
return nil, ocispecs.Descriptor{}, err
}
src := &withDistributionSourceLabel{
Provider: contentutil.FromFetcher(limited.Default.WrapFetcher(fetcher, refString)),
ref: refString,
source: cs,
}
return remotecache.NewImporter(src), desc, nil
}
}
type withDistributionSourceLabel struct {
content.Provider
ref string
source content.Manager
}
var _ remotecache.DistributionSourceLabelSetter = &withDistributionSourceLabel{}
func (dsl *withDistributionSourceLabel) SetDistributionSourceLabel(ctx context.Context, dgst digest.Digest) error {
hf, err := docker.AppendDistributionSourceLabel(dsl.source, dsl.ref)
if err != nil {
return err
}
_, err = hf(ctx, ocispecs.Descriptor{Digest: dgst})
return err
}
func (dsl *withDistributionSourceLabel) SetDistributionSourceAnnotation(desc ocispecs.Descriptor) ocispecs.Descriptor {
if desc.Annotations == nil {
desc.Annotations = map[string]string{}
}
desc.Annotations["containerd.io/distribution.source.ref"] = dsl.ref
return desc
}
func (dsl *withDistributionSourceLabel) SnapshotLabels(descs []ocispecs.Descriptor, index int) map[string]string {
if len(descs) < index {
return nil
}
labels := snapshots.FilterInheritedLabels(descs[index].Annotations)
if labels == nil {
labels = make(map[string]string)
}
for k, v := range estargz.SnapshotLabels(dsl.ref, descs, index) {
labels[k] = v
}
return labels
}
func registryConfig(hosts docker.RegistryHosts, ref reference.Named, scope string, insecure bool) (string, docker.RegistryHosts) {
if insecure {
insecureTrue := true
httpTrue := true
hosts = resolver.NewRegistryConfig(map[string]resolverconfig.RegistryConfig{
reference.Domain(ref): {
Insecure: &insecureTrue,
PlainHTTP: &httpTrue,
},
})
scope += ":insecure"
}
return scope, hosts
}
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