Move build endpoint handler from daemon (#21972)

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Upstream-commit: 73ac6d199cacbcdba4c062f982b31f8d57e03f3c
Component: engine

components/engine/daemon/builder.go

@@ -1,33 +0,0 @@
-package daemon
-
-import (
-	"io"
-
-	"github.com/Sirupsen/logrus"
-	"github.com/docker/docker/api/types/backend"
-	"github.com/docker/docker/builder"
-	"github.com/docker/docker/builder/dockerfile"
-	"github.com/docker/engine-api/types"
-	"golang.org/x/net/context"
-)
-
-// BuildFromContext builds a new image from a given context.
-func (daemon *Daemon) BuildFromContext(ctx context.Context, src io.ReadCloser, remote string, buildOptions *types.ImageBuildOptions, pg backend.ProgressWriter) (string, error) {
-	buildContext, dockerfileName, err := builder.DetectContextFromRemoteURL(src, remote, pg.ProgressReaderFunc)
-	if err != nil {
-		return "", err
-	}
-	defer func() {
-		if err := buildContext.Close(); err != nil {
-			logrus.Debugf("[BUILDER] failed to remove temporary context: %v", err)
-		}
-	}()
-	if len(dockerfileName) > 0 {
-		buildOptions.Dockerfile = dockerfileName
-	}
-
-	m := dockerfile.NewBuildManager(daemon)
-	return m.Build(ctx, buildOptions,
-		builder.DockerIgnoreContext{ModifiableContext: buildContext},
-		pg.StdoutFormatter, pg.StderrFormatter, pg.Output)
-}