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package llb
import (
"io"
"github.com/containerd/containerd/platforms"
"github.com/moby/buildkit/solver/pb"
digest "github.com/opencontainers/go-digest"
)
// Definition is the LLB definition structure with per-vertex metadata entries
// Corresponds to the Definition structure defined in solver/pb.Definition.
type Definition struct {
Def [][]byte
Metadata map[digest.Digest]pb.OpMetadata
Source *pb.Source
Constraints *Constraints
}
func (def *Definition) ToPB() *pb.Definition {
md := make(map[digest.Digest]pb.OpMetadata, len(def.Metadata))
for k, v := range def.Metadata {
md[k] = v
}
return &pb.Definition{
Def: def.Def,
Source: def.Source,
Metadata: md,
}
}
func (def *Definition) FromPB(x *pb.Definition) {
def.Def = x.Def
def.Source = x.Source
def.Metadata = make(map[digest.Digest]pb.OpMetadata)
for k, v := range x.Metadata {
def.Metadata[k] = v
}
}
func (def *Definition) Head() (digest.Digest, error) {
if len(def.Def) == 0 {
return "", nil
}
last := def.Def[len(def.Def)-1]
var pop pb.Op
if err := (&pop).Unmarshal(last); err != nil {
return "", err
}
if len(pop.Inputs) == 0 {
return "", nil
}
return pop.Inputs[0].Digest, nil
}
func WriteTo(def *Definition, w io.Writer) error {
b, err := def.ToPB().Marshal()
if err != nil {
return err
}
_, err = w.Write(b)
return err
}
func ReadFrom(r io.Reader) (*Definition, error) {
b, err := io.ReadAll(r)
if err != nil {
return nil, err
}
var pbDef pb.Definition
if err := pbDef.Unmarshal(b); err != nil {
return nil, err
}
var def Definition
def.FromPB(&pbDef)
return &def, nil
}
func MarshalConstraints(base, override *Constraints) (*pb.Op, *pb.OpMetadata) {
c := *base
c.WorkerConstraints = append([]string{}, c.WorkerConstraints...)
if p := override.Platform; p != nil {
c.Platform = p
}
c.WorkerConstraints = append(c.WorkerConstraints, override.WorkerConstraints...)
c.Metadata = mergeMetadata(c.Metadata, override.Metadata)
if c.Platform == nil {
defaultPlatform := platforms.Normalize(platforms.DefaultSpec())
c.Platform = &defaultPlatform
}
opPlatform := pb.Platform{
OS: c.Platform.OS,
Architecture: c.Platform.Architecture,
Variant: c.Platform.Variant,
OSVersion: c.Platform.OSVersion,
}
if c.Platform.OSFeatures != nil {
opPlatform.OSFeatures = append([]string{}, c.Platform.OSFeatures...)
}
return &pb.Op{
Platform: &opPlatform,
Constraints: &pb.WorkerConstraints{
Filter: c.WorkerConstraints,
},
}, &c.Metadata
}
type MarshalCache struct {
digest digest.Digest
dt []byte
md *pb.OpMetadata
srcs []*SourceLocation
constraints *Constraints
}
func (mc *MarshalCache) Cached(c *Constraints) bool {
return mc.dt != nil && mc.constraints == c
}
func (mc *MarshalCache) Load() (digest.Digest, []byte, *pb.OpMetadata, []*SourceLocation, error) {
return mc.digest, mc.dt, mc.md, mc.srcs, nil
}
func (mc *MarshalCache) Store(dt []byte, md *pb.OpMetadata, srcs []*SourceLocation, c *Constraints) {
mc.digest = digest.FromBytes(dt)
mc.dt = dt
mc.md = md
mc.constraints = c
mc.srcs = srcs
}
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