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package builder
import (
"context"
"fmt"
"github.com/mitchellh/hashstructure/v2"
"github.com/moby/buildkit/client/llb/sourceresolver"
"github.com/moby/buildkit/frontend/gateway/client"
"github.com/moby/buildkit/util/flightcontrol"
digest "github.com/opencontainers/go-digest"
)
// withResolveCache wraps client.Client so that ResolveImageConfig
// calls are cached and deduplicated via flightcontrol.CachedGroup
type withResolveCache struct {
client.Client
g flightcontrol.CachedGroup[*resolveResult]
}
type resolveResult struct {
ref string
dgst digest.Digest
cfg []byte
}
var _ client.Client = &withResolveCache{}
func (c *withResolveCache) ResolveImageConfig(ctx context.Context, ref string, opt sourceresolver.Opt) (string, digest.Digest, []byte, error) {
c.g.CacheError = true
optHash, err := hashstructure.Hash(opt, hashstructure.FormatV2, nil)
if err != nil {
return "", "", nil, err
}
key := fmt.Sprintf("%s,%d", ref, optHash)
res, err := c.g.Do(ctx, key, func(ctx context.Context) (*resolveResult, error) {
ref, dgst, cfg, err := c.Client.ResolveImageConfig(ctx, ref, opt)
if err != nil {
return nil, err
}
return &resolveResult{ref, dgst, cfg}, nil
})
if err != nil {
return "", "", nil, err
}
return res.ref, res.dgst, res.cfg, nil
}
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