@@ -77,6 +77,7 @@ func (cli *DockerCli) CmdBuild(args ...string) error {

 	noCache := cmd.Bool([]string{"#no-cache", "-no-cache"}, false, "Do not use cache when building the image")

 	rm := cmd.Bool([]string{"#rm", "-rm"}, true, "Remove intermediate containers after a successful build")

 	forceRm := cmd.Bool([]string{"-force-rm"}, false, "Always remove intermediate containers, even after unsuccessful builds")

+	pull := cmd.Bool([]string{"-pull"}, false, "Always attempt to pull a newer version of the image")

 	if err := cmd.Parse(args); err != nil {

 		return nil

 	}

@@ -213,6 +214,9 @@ func (cli *DockerCli) CmdBuild(args ...string) error {

 		v.Set("forcerm", "1")

 	}

+	if *pull {

+		v.Set("pull", "1")

+	}

 	cli.LoadConfigFile()

 	headers := http.Header(make(map[string][]string))

@@ -1016,6 +1016,9 @@ func postBuild(eng *engine.Engine, version version.Version, w http.ResponseWrite

 	} else {

 		job.Setenv("rm", r.FormValue("rm"))

 	}

+	if r.FormValue("pull") == "1" && version.GreaterThanOrEqualTo("1.16") {

+		job.Setenv("pull", "1")

+	}

 	job.Stdin.Add(r.Body)

 	job.Setenv("remote", r.FormValue("remote"))

 	job.Setenv("t", r.FormValue("t"))

@@ -115,6 +115,12 @@ func from(b *Builder, args []string, attributes map[string]bool, original string

 	name := args[0]

 	image, err := b.Daemon.Repositories().LookupImage(name)

+	if b.Pull {

+		image, err = b.pullImage(name)

+		if err != nil {

+			return err

+		}

+	}

 	if err != nil {

 		if b.Daemon.Graph().IsNotExist(err) {

 			image, err = b.pullImage(name)

@@ -90,6 +90,7 @@ type Builder struct {

 	// controls how images and containers are handled between steps.

 	Remove      bool

 	ForceRemove bool

+	Pull        bool

 	AuthConfig     *registry.AuthConfig

 	AuthConfigFile *registry.ConfigFile

@@ -35,6 +35,7 @@ func (b *BuilderJob) CmdBuild(job *engine.Job) engine.Status {

 		noCache        = job.GetenvBool("nocache")

 		rm             = job.GetenvBool("rm")

 		forceRm        = job.GetenvBool("forcerm")

+		pull           = job.GetenvBool("pull")

 		authConfig     = &registry.AuthConfig{}

 		configFile     = &registry.ConfigFile{}

 		tag            string

@@ -111,6 +112,7 @@ func (b *BuilderJob) CmdBuild(job *engine.Job) engine.Status {

 		UtilizeCache:    !noCache,

 		Remove:          rm,

 		ForceRemove:     forceRm,

+		Pull:            pull,

 		OutOld:          job.Stdout,

 		StreamFormatter: sf,

 		AuthConfig:      authConfig,

@@ -1156,6 +1156,7 @@ Query Parameters:

         the resulting image in case of success

 -   **q** – suppress verbose build output

 -   **nocache** – do not use the cache when building the image

+-   **pull** - attempt to pull the image even if an older image exists locally

 -   **rm** - remove intermediate containers after a successful build (default behavior)

 -   **forcerm - always remove intermediate containers (includes rm)

@@ -312,6 +312,7 @@ To kill the container, use `docker kill`.

       --force-rm=false     Always remove intermediate containers, even after unsuccessful builds

       --no-cache=false     Do not use cache when building the image

+      --pull=false         Always attempt to pull a newer version of the image

       -q, --quiet=false    Suppress the verbose output generated by the containers

       --rm=true            Remove intermediate containers after a successful build

       -t, --tag=""         Repository name (and optionally a tag) to be applied to the resulting image in case of success