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package client
import (
pb "github.com/moby/buildkit/frontend/gateway/pb"
"github.com/moby/buildkit/solver/result"
digest "github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)
func AttestationToPB[T any](a *result.Attestation[T]) (*pb.Attestation, error) {
if a.ContentFunc != nil {
return nil, errors.Errorf("attestation callback cannot be sent through gateway")
}
subjects := make([]*pb.InTotoSubject, len(a.InToto.Subjects))
for i, subject := range a.InToto.Subjects {
subjects[i] = &pb.InTotoSubject{
Kind: subject.Kind,
Name: subject.Name,
Digest: digestSliceToPB(subject.Digest),
}
}
return &pb.Attestation{
Kind: a.Kind,
Metadata: a.Metadata,
Path: a.Path,
InTotoPredicateType: a.InToto.PredicateType,
InTotoSubjects: subjects,
}, nil
}
func AttestationFromPB[T any](a *pb.Attestation) (*result.Attestation[T], error) {
if a == nil {
return nil, errors.Errorf("invalid nil attestation")
}
subjects := make([]result.InTotoSubject, len(a.InTotoSubjects))
for i, subject := range a.InTotoSubjects {
if subject == nil {
return nil, errors.Errorf("invalid nil attestation subject")
}
subjects[i] = result.InTotoSubject{
Kind: subject.Kind,
Name: subject.Name,
Digest: digestSliceFromPB(subject.Digest),
}
}
return &result.Attestation[T]{
Kind: a.Kind,
Metadata: a.Metadata,
Path: a.Path,
InToto: result.InTotoAttestation{
PredicateType: a.InTotoPredicateType,
Subjects: subjects,
},
}, nil
}
func digestSliceToPB(elems []digest.Digest) []string {
clone := make([]string, len(elems))
for i, e := range elems {
clone[i] = string(e)
}
return clone
}
func digestSliceFromPB(elems []string) []digest.Digest {
clone := make([]digest.Digest, len(elems))
for i, e := range elems {
clone[i] = digest.Digest(e)
}
return clone
}
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