build: basic buildkit progress support

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

vendor/github.com/docker/docker/api/types/client.go

@@ -181,8 +181,24 @@ type ImageBuildOptions struct {
 	Target      string
 	SessionID   string
 	Platform    string
+	// Version specifies the version of the unerlying builder to use
+	Version BuilderVersion
+	// BuildID is an optional identifier that can be passed together with the
+	// build request. The same identifier can be used to gracefully cancel the
+	// build with the cancel request.
+	BuildID string
 }
 
+// BuilderVersion sets the version of underlying builder to use
+type BuilderVersion string
+
+const (
+	// BuilderV1 is the first generation builder in docker daemon
+	BuilderV1 BuilderVersion = "1"
+	// BuilderBuildKit is builder based on moby/buildkit project
+	BuilderBuildKit = "2"
+)
+
 // ImageBuildResponse holds information
 // returned by a server after building
 // an image.

vendor/github.com/docker/docker/api/types/types.go

@@ -512,7 +512,8 @@ type DiskUsage struct {
 	Images      []*ImageSummary
 	Containers  []*Container
 	Volumes     []*Volume
-	BuilderSize int64
+	BuildCache  []*BuildCache
+	BuilderSize int64 // deprecated
 }
 
 // ContainersPruneReport contains the response for Engine API:
@@ -585,3 +586,17 @@ type PushResult struct {
 type BuildResult struct {
 	ID string
 }
+
+// BuildCache contains information about a build cache record
+type BuildCache struct {
+	ID      string
+	Mutable bool
+	InUse   bool
+	Size    int64
+
+	CreatedAt   time.Time
+	LastUsedAt  *time.Time
+	UsageCount  int
+	Parent      string
+	Description string
+}