vendor: add buildkit

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

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

@@ -0,0 +1,83 @@
+package client
+
+import (
+	"context"
+	"io"
+	"time"
+
+	controlapi "github.com/moby/buildkit/api/services/control"
+	"github.com/pkg/errors"
+)
+
+func (c *Client) Prune(ctx context.Context, ch chan UsageInfo, opts ...PruneOption) error {
+	info := &PruneInfo{}
+	for _, o := range opts {
+		o.SetPruneOption(info)
+	}
+
+	req := &controlapi.PruneRequest{
+		Filter:       info.Filter,
+		KeepDuration: int64(info.KeepDuration),
+		KeepBytes:    int64(info.KeepBytes),
+	}
+	if info.All {
+		req.All = true
+	}
+	cl, err := c.controlClient().Prune(ctx, req)
+	if err != nil {
+		return errors.Wrap(err, "failed to call prune")
+	}
+
+	for {
+		d, err := cl.Recv()
+		if err != nil {
+			if err == io.EOF {
+				return nil
+			}
+			return err
+		}
+		if ch != nil {
+			ch <- UsageInfo{
+				ID:          d.ID,
+				Mutable:     d.Mutable,
+				InUse:       d.InUse,
+				Size:        d.Size_,
+				Parent:      d.Parent,
+				CreatedAt:   d.CreatedAt,
+				Description: d.Description,
+				UsageCount:  int(d.UsageCount),
+				LastUsedAt:  d.LastUsedAt,
+				RecordType:  UsageRecordType(d.RecordType),
+				Shared:      d.Shared,
+			}
+		}
+	}
+}
+
+type PruneOption interface {
+	SetPruneOption(*PruneInfo)
+}
+
+type PruneInfo struct {
+	Filter       []string
+	All          bool
+	KeepDuration time.Duration
+	KeepBytes    int64
+}
+
+type pruneOptionFunc func(*PruneInfo)
+
+func (f pruneOptionFunc) SetPruneOption(pi *PruneInfo) {
+	f(pi)
+}
+
+var PruneAll = pruneOptionFunc(func(pi *PruneInfo) {
+	pi.All = true
+})
+
+func WithKeepOpt(duration time.Duration, bytes int64) PruneOption {
+	return pruneOptionFunc(func(pi *PruneInfo) {
+		pi.KeepDuration = duration
+		pi.KeepBytes = bytes
+	})
+}