103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
package cacheimport
|
|
|
|
import (
|
|
"encoding/json"
|
|
|
|
solver "github.com/moby/buildkit/solver-next"
|
|
"github.com/moby/buildkit/util/contentutil"
|
|
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
func Parse(configJSON []byte, provider DescriptorProvider, t solver.CacheExporterTarget) error {
|
|
var config CacheConfig
|
|
if err := json.Unmarshal(configJSON, &config); err != nil {
|
|
return err
|
|
}
|
|
|
|
cache := map[int]solver.CacheExporterRecord{}
|
|
|
|
for i := range config.Records {
|
|
if _, err := parseRecord(config, i, provider, t, cache); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func parseRecord(cc CacheConfig, idx int, provider DescriptorProvider, t solver.CacheExporterTarget, cache map[int]solver.CacheExporterRecord) (solver.CacheExporterRecord, error) {
|
|
if r, ok := cache[idx]; ok {
|
|
if r == nil {
|
|
return nil, errors.Errorf("invalid looping record")
|
|
}
|
|
return r, nil
|
|
}
|
|
|
|
if idx < 0 || idx >= len(cc.Records) {
|
|
return nil, errors.Errorf("invalid record ID: %d", idx)
|
|
}
|
|
rec := cc.Records[idx]
|
|
|
|
r := t.Add(rec.Digest)
|
|
cache[idx] = nil
|
|
for i, inputs := range rec.Inputs {
|
|
for _, inp := range inputs {
|
|
src, err := parseRecord(cc, inp.LinkIndex, provider, t, cache)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
r.LinkFrom(src, i, inp.Selector)
|
|
}
|
|
}
|
|
|
|
for _, res := range rec.Results {
|
|
visited := map[int]struct{}{}
|
|
remote, err := getRemoteChain(cc.Layers, res.LayerIndex, provider, visited)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
r.AddResult(res.CreatedAt, remote)
|
|
}
|
|
|
|
cache[idx] = r
|
|
return r, nil
|
|
}
|
|
|
|
func getRemoteChain(layers []CacheLayer, idx int, provider DescriptorProvider, visited map[int]struct{}) (*solver.Remote, error) {
|
|
if _, ok := visited[idx]; ok {
|
|
return nil, errors.Errorf("invalid looping layer")
|
|
}
|
|
visited[idx] = struct{}{}
|
|
|
|
if idx < 0 || idx >= len(layers) {
|
|
return nil, errors.Errorf("invalid layer index %d", idx)
|
|
}
|
|
|
|
l := layers[idx]
|
|
|
|
descPair, ok := provider[l.Blob]
|
|
if !ok {
|
|
return nil, errors.Errorf("missing blob for %s", l.Blob)
|
|
}
|
|
|
|
var r *solver.Remote
|
|
if l.ParentIndex != -1 {
|
|
var err error
|
|
r, err = getRemoteChain(layers, l.ParentIndex, provider, visited)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
r.Descriptors = append(r.Descriptors, descPair.Descriptor)
|
|
mp := contentutil.NewMultiProvider(r.Provider)
|
|
mp.Add(descPair.Descriptor.Digest, descPair.Provider)
|
|
r.Provider = mp
|
|
return r, nil
|
|
}
|
|
return &solver.Remote{
|
|
Descriptors: []ocispec.Descriptor{descPair.Descriptor},
|
|
Provider: descPair.Provider,
|
|
}, nil
|
|
|
|
}
|