package task import ( "context" "encoding/json" "fmt" "github.com/docker/distribution/reference" "github.com/moby/buildkit/client/llb" "go.dagger.io/dagger/compiler" "go.dagger.io/dagger/plancontext" "go.dagger.io/dagger/solver" ) func init() { Register("Pull", func() Task { return &pullTask{} }) } type pullTask struct { } func (c *pullTask) Run(ctx context.Context, pctx *plancontext.Context, s solver.Solver, v *compiler.Value) (*compiler.Value, error) { // FIXME: handle auth rawRef, err := v.Lookup("source").String() if err != nil { return nil, err } ref, err := reference.ParseNormalizedNamed(rawRef) if err != nil { return nil, fmt.Errorf("failed to parse ref %s: %w", rawRef, err) } // Add the default tag "latest" to a reference if it only has a repo name. ref = reference.TagNameOnly(ref) st := llb.Image( ref.String(), withCustomName(v, "Pull %s", rawRef), ) // Load image metadata and convert to to LLB. platform := pctx.Platform.Get() image, digest, err := s.ResolveImageConfig(ctx, ref.String(), llb.ResolveImageConfigOpt{ LogName: vertexNamef(v, "load metadata for %s", ref.String()), Platform: &platform, }) if err != nil { return nil, err } imageJSON, err := json.Marshal(image) if err != nil { return nil, err } // Apply Image Config on top of LLB instructions st, err = st.WithImageConfig(imageJSON) if err != nil { return nil, err } result, err := s.Solve(ctx, st, pctx.Platform.Get()) if err != nil { return nil, err } fs := pctx.FS.New(result) return compiler.NewValue().FillFields(map[string]interface{}{ "output": fs.MarshalCUE(), "digest": digest, "config": image.Config, }) }