129 lines
3.4 KiB
Go
129 lines
3.4 KiB
Go
package remotecache
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"encoding/json"
|
|
"fmt"
|
|
"time"
|
|
|
|
"github.com/containerd/containerd/content"
|
|
"github.com/containerd/containerd/images"
|
|
v1 "github.com/moby/buildkit/cache/remotecache/v1"
|
|
"github.com/moby/buildkit/solver"
|
|
"github.com/moby/buildkit/util/contentutil"
|
|
"github.com/moby/buildkit/util/progress"
|
|
digest "github.com/opencontainers/go-digest"
|
|
specs "github.com/opencontainers/image-spec/specs-go"
|
|
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
type ResolveCacheExporterFunc func(ctx context.Context, typ, target string) (Exporter, error)
|
|
|
|
func oneOffProgress(ctx context.Context, id string) func(err error) error {
|
|
pw, _, _ := progress.FromContext(ctx)
|
|
now := time.Now()
|
|
st := progress.Status{
|
|
Started: &now,
|
|
}
|
|
pw.Write(id, st)
|
|
return func(err error) error {
|
|
now := time.Now()
|
|
st.Completed = &now
|
|
pw.Write(id, st)
|
|
pw.Close()
|
|
return err
|
|
}
|
|
}
|
|
|
|
type Exporter interface {
|
|
solver.CacheExporterTarget
|
|
Finalize(ctx context.Context) error
|
|
}
|
|
|
|
type contentCacheExporter struct {
|
|
solver.CacheExporterTarget
|
|
chains *v1.CacheChains
|
|
ingester content.Ingester
|
|
}
|
|
|
|
func NewExporter(ingester content.Ingester) Exporter {
|
|
cc := v1.NewCacheChains()
|
|
return &contentCacheExporter{CacheExporterTarget: cc, chains: cc, ingester: ingester}
|
|
}
|
|
|
|
func (ce *contentCacheExporter) Finalize(ctx context.Context) error {
|
|
return export(ctx, ce.ingester, ce.chains)
|
|
}
|
|
|
|
func export(ctx context.Context, ingester content.Ingester, cc *v1.CacheChains) error {
|
|
config, descs, err := cc.Marshal()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// own type because oci type can't be pushed and docker type doesn't have annotations
|
|
type manifestList struct {
|
|
specs.Versioned
|
|
|
|
MediaType string `json:"mediaType,omitempty"`
|
|
|
|
// Manifests references platform specific manifests.
|
|
Manifests []ocispec.Descriptor `json:"manifests"`
|
|
}
|
|
|
|
var mfst manifestList
|
|
mfst.SchemaVersion = 2
|
|
mfst.MediaType = images.MediaTypeDockerSchema2ManifestList
|
|
|
|
for _, l := range config.Layers {
|
|
dgstPair, ok := descs[l.Blob]
|
|
if !ok {
|
|
return errors.Errorf("missing blob %s", l.Blob)
|
|
}
|
|
layerDone := oneOffProgress(ctx, fmt.Sprintf("writing layer %s", l.Blob))
|
|
if err := contentutil.Copy(ctx, ingester, dgstPair.Provider, dgstPair.Descriptor); err != nil {
|
|
return layerDone(errors.Wrap(err, "error writing layer blob"))
|
|
}
|
|
layerDone(nil)
|
|
mfst.Manifests = append(mfst.Manifests, dgstPair.Descriptor)
|
|
}
|
|
|
|
dt, err := json.Marshal(config)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
dgst := digest.FromBytes(dt)
|
|
desc := ocispec.Descriptor{
|
|
Digest: dgst,
|
|
Size: int64(len(dt)),
|
|
MediaType: v1.CacheConfigMediaTypeV0,
|
|
}
|
|
configDone := oneOffProgress(ctx, fmt.Sprintf("writing config %s", dgst))
|
|
if err := content.WriteBlob(ctx, ingester, dgst.String(), bytes.NewReader(dt), desc); err != nil {
|
|
return configDone(errors.Wrap(err, "error writing config blob"))
|
|
}
|
|
configDone(nil)
|
|
|
|
mfst.Manifests = append(mfst.Manifests, desc)
|
|
|
|
dt, err = json.Marshal(mfst)
|
|
if err != nil {
|
|
return errors.Wrap(err, "failed to marshal manifest")
|
|
}
|
|
dgst = digest.FromBytes(dt)
|
|
|
|
desc = ocispec.Descriptor{
|
|
Digest: dgst,
|
|
Size: int64(len(dt)),
|
|
MediaType: mfst.MediaType,
|
|
}
|
|
mfstDone := oneOffProgress(ctx, fmt.Sprintf("writing manifest %s", dgst))
|
|
if err := content.WriteBlob(ctx, ingester, dgst.String(), bytes.NewReader(dt), desc); err != nil {
|
|
return mfstDone(errors.Wrap(err, "error writing manifest blob"))
|
|
}
|
|
mfstDone(nil)
|
|
return nil
|
|
}
|