Remove builder dependency from the api.

Signed-off-by: David Calavera <david.calavera@gmail.com>

api/server/router/build/backend.go

@@ -3,7 +3,7 @@ package build
 import (
 	"io"
 
-	"github.com/docker/docker/builder"
+	"github.com/docker/docker/api/types/backend"
 	"github.com/docker/engine-api/types"
 	"golang.org/x/net/context"
 )
@@ -16,5 +16,5 @@ type Backend interface {
 	// by the caller.
 	//
 	// TODO: make this return a reference instead of string
-	Build(clientCtx context.Context, config *types.ImageBuildOptions, context builder.Context, stdout io.Writer, stderr io.Writer, out io.Writer) (string, error)
+	BuildFromContext(ctx context.Context, src io.ReadCloser, remote string, buildOptions *types.ImageBuildOptions, pg backend.ProgressWriter) (string, error)
 }

api/server/router/build/build_routes.go

@@ -13,7 +13,7 @@ import (
 
 	"github.com/Sirupsen/logrus"
 	"github.com/docker/docker/api/server/httputils"
-	"github.com/docker/docker/builder"
+	"github.com/docker/docker/api/types/backend"
 	"github.com/docker/docker/pkg/ioutils"
 	"github.com/docker/docker/pkg/progress"
 	"github.com/docker/docker/pkg/streamformatter"
@@ -148,6 +148,7 @@ func (br *buildRouter) postBuild(ctx context.Context, w http.ResponseWriter, r *
 	if err != nil {
 		return errf(err)
 	}
+	buildOptions.AuthConfigs = authConfigs
 
 	remoteURL := r.FormValue("remote")
 
@@ -161,21 +162,6 @@ func (br *buildRouter) postBuild(ctx context.Context, w http.ResponseWriter, r *
 		return progress.NewProgressReader(in, progressOutput, r.ContentLength, "Downloading context", remoteURL)
 	}
 
-	buildContext, dockerfileName, err := builder.DetectContextFromRemoteURL(r.Body, remoteURL, createProgressReader)
-	if err != nil {
-		return errf(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
-	}
-
-	buildOptions.AuthConfigs = authConfigs
-
 	var out io.Writer = output
 	if buildOptions.SuppressOutput {
 		out = notVerboseBuffer
@@ -184,9 +170,14 @@ func (br *buildRouter) postBuild(ctx context.Context, w http.ResponseWriter, r *
 	stdout := &streamformatter.StdoutFormatter{Writer: out, StreamFormatter: sf}
 	stderr := &streamformatter.StderrFormatter{Writer: out, StreamFormatter: sf}
 
-	imgID, err := br.backend.Build(ctx, buildOptions,
-		builder.DockerIgnoreContext{ModifiableContext: buildContext},
-		stdout, stderr, out)
+	pg := backend.ProgressWriter{
+		Output:             out,
+		StdoutFormatter:    stdout,
+		StderrFormatter:    stderr,
+		ProgressReaderFunc: createProgressReader,
+	}
+
+	imgID, err := br.backend.BuildFromContext(ctx, r.Body, remoteURL, buildOptions, pg)
 	if err != nil {
 		return errf(err)
 	}

api/types/backend/backend.go

@@ -6,6 +6,7 @@ package backend
 import (
 	"io"
 
+	"github.com/docker/docker/pkg/streamformatter"
 	"github.com/docker/engine-api/types"
 )
 
@@ -73,3 +74,12 @@ type ContainerCommitConfig struct {
 	types.ContainerCommitConfig
 	Changes []string
 }
+
+// ProgressWriter is an interface
+// to transport progress streams.
+type ProgressWriter struct {
+	Output             io.Writer
+	StdoutFormatter    *streamformatter.StdoutFormatter
+	StderrFormatter    *streamformatter.StderrFormatter
+	ProgressReaderFunc func(io.ReadCloser) io.ReadCloser
+}

daemon/builder.go

@@ -0,0 +1,33 @@
+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)
+}

docker/daemon.go

@@ -22,7 +22,6 @@ import (
 	"github.com/docker/docker/api/server/router/network"
 	systemrouter "github.com/docker/docker/api/server/router/system"
 	"github.com/docker/docker/api/server/router/volume"
-	"github.com/docker/docker/builder/dockerfile"
 	"github.com/docker/docker/cli"
 	"github.com/docker/docker/cliconfig"
 	"github.com/docker/docker/daemon"
@@ -413,7 +412,7 @@ func initRouter(s *apiserver.Server, d *daemon.Daemon) {
 		image.NewRouter(d, decoder),
 		systemrouter.NewRouter(d),
 		volume.NewRouter(d),
-		build.NewRouter(dockerfile.NewBuildManager(d)),
+		build.NewRouter(d),
 	}
 	if d.NetworkControllerEnabled() {
 		routers = append(routers, network.NewRouter(d))