Decode container configurations into typed structures.

Signed-off-by: David Calavera <david.calavera@gmail.com>
Upstream-commit: 767df67e3149b83255db0809f6543b449a4f652e
Component: engine

components/engine/daemon/exec.go

@@ -132,7 +132,8 @@ func (d *Daemon) ContainerExecCreate(job *engine.Job) error {
 		return err
 	}
 
-	entrypoint, args := d.getEntrypointAndArgs(nil, config.Cmd)
+	cmd := runconfig.NewCommand(config.Cmd...)
+	entrypoint, args := d.getEntrypointAndArgs(runconfig.NewEntrypoint(), cmd)
 
 	processConfig := execdriver.ProcessConfig{
 		Tty:        config.Tty,