101 lines
2.6 KiB
Go
101 lines
2.6 KiB
Go
package solver
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import (
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"strings"
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"github.com/moby/buildkit/solver/pb"
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"github.com/moby/buildkit/source"
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digest "github.com/opencontainers/go-digest"
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"github.com/pkg/errors"
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)
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func newVertex(dgst digest.Digest, op *pb.Op, opMeta *pb.OpMetadata, load func(digest.Digest) (interface{}, error)) (*vertex, error) {
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vtx := &vertex{sys: op.Op, metadata: opMeta, digest: dgst, name: llbOpName(op)}
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for _, in := range op.Inputs {
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sub, err := load(in.Digest)
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if err != nil {
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return nil, err
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}
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vtx.inputs = append(vtx.inputs, &input{index: Index(in.Index), vertex: sub.(*vertex)})
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}
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vtx.initClientVertex()
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return vtx, nil
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}
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func loadInternalVertexHelper(v Vertex, cache map[digest.Digest]*vertex) *vertex {
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if v, ok := cache[v.Digest()]; ok {
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return v
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}
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vtx := &vertex{sys: v.Sys(), metadata: v.Metadata(), digest: v.Digest(), name: v.Name()}
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for _, in := range v.Inputs() {
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vv := loadInternalVertexHelper(in.Vertex, cache)
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vtx.inputs = append(vtx.inputs, &input{index: in.Index, vertex: vv})
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}
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vtx.initClientVertex()
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cache[v.Digest()] = vtx
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return vtx
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}
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// loadLLB loads LLB.
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// fn is executed sequentially.
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func loadLLB(def *pb.Definition, fn func(digest.Digest, *pb.Op, func(digest.Digest) (interface{}, error)) (interface{}, error)) (interface{}, pb.OutputIndex, error) {
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if len(def.Def) == 0 {
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return nil, 0, errors.New("invalid empty definition")
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}
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allOps := make(map[digest.Digest]*pb.Op)
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var dgst digest.Digest
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for _, dt := range def.Def {
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var op pb.Op
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if err := (&op).Unmarshal(dt); err != nil {
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return nil, 0, errors.Wrap(err, "failed to parse llb proto op")
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}
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dgst = digest.FromBytes(dt)
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allOps[dgst] = &op
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}
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lastOp := allOps[dgst]
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delete(allOps, dgst)
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dgst = lastOp.Inputs[0].Digest
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cache := make(map[digest.Digest]interface{})
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var rec func(dgst digest.Digest) (interface{}, error)
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rec = func(dgst digest.Digest) (interface{}, error) {
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if v, ok := cache[dgst]; ok {
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return v, nil
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}
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v, err := fn(dgst, allOps[dgst], rec)
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if err != nil {
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return nil, err
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}
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cache[dgst] = v
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return v, nil
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}
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v, err := rec(dgst)
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return v, lastOp.Inputs[0].Index, err
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}
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func llbOpName(op *pb.Op) string {
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switch op := op.Op.(type) {
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case *pb.Op_Source:
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if id, err := source.FromLLB(op); err == nil {
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if id, ok := id.(*source.LocalIdentifier); ok {
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if len(id.IncludePatterns) == 1 {
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return op.Source.Identifier + " (" + id.IncludePatterns[0] + ")"
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}
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}
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}
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return op.Source.Identifier
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case *pb.Op_Exec:
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return strings.Join(op.Exec.Meta.Args, " ")
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case *pb.Op_Build:
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return "build"
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default:
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return "unknown"
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}
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}
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