vendor: add buildkit

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/moby/buildkit/client/workers.go

@@ -0,0 +1,70 @@
+package client
+
+import (
+	"context"
+	"time"
+
+	controlapi "github.com/moby/buildkit/api/services/control"
+	apitypes "github.com/moby/buildkit/api/types"
+	"github.com/moby/buildkit/solver/pb"
+	specs "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/pkg/errors"
+)
+
+// WorkerInfo contains information about a worker
+type WorkerInfo struct {
+	ID        string
+	Labels    map[string]string
+	Platforms []specs.Platform
+	GCPolicy  []PruneInfo
+}
+
+// ListWorkers lists all active workers
+func (c *Client) ListWorkers(ctx context.Context, opts ...ListWorkersOption) ([]*WorkerInfo, error) {
+	info := &ListWorkersInfo{}
+	for _, o := range opts {
+		o.SetListWorkersOption(info)
+	}
+
+	req := &controlapi.ListWorkersRequest{Filter: info.Filter}
+	resp, err := c.controlClient().ListWorkers(ctx, req)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to list workers")
+	}
+
+	var wi []*WorkerInfo
+
+	for _, w := range resp.Record {
+		wi = append(wi, &WorkerInfo{
+			ID:        w.ID,
+			Labels:    w.Labels,
+			Platforms: pb.ToSpecPlatforms(w.Platforms),
+			GCPolicy:  fromAPIGCPolicy(w.GCPolicy),
+		})
+	}
+
+	return wi, nil
+}
+
+// ListWorkersOption is an option for a worker list query
+type ListWorkersOption interface {
+	SetListWorkersOption(*ListWorkersInfo)
+}
+
+// ListWorkersInfo is a payload for worker list query
+type ListWorkersInfo struct {
+	Filter []string
+}
+
+func fromAPIGCPolicy(in []*apitypes.GCPolicy) []PruneInfo {
+	out := make([]PruneInfo, 0, len(in))
+	for _, p := range in {
+		out = append(out, PruneInfo{
+			All:          p.All,
+			Filter:       p.Filters,
+			KeepDuration: time.Duration(p.KeepDuration),
+			KeepBytes:    p.KeepBytes,
+		})
+	}
+	return out
+}