// buildImage invokes a docker build on a particular directory
func buildImage(client DockerClient, dir string, tar tar.Tar, opts *docker.BuildImageOptions) error {
// TODO: be able to pass a stream directly to the Docker build to avoid the double temp hit
if opts == nil {
return fmt.Errorf("%s", "build image options nil")
}
r, w := io.Pipe()
go func() {
defer utilruntime.HandleCrash()
defer w.Close()
if err := tar.CreateTarStream(dir, false, w); err != nil {
w.CloseWithError(err)
}
}()
defer w.Close()
opts.InputStream = r
glog.V(5).Infof("Invoking Docker build to create %q", opts.Name)
return client.BuildImage(*opts)
}
