// UntarToDest writes to user destination the streamed tarball in input
func UntarToDest(api *api.ScalewayAPI, sourceStream *io.ReadCloser, destination string) error {
// destination is a server address + path (scp-like uri)
if strings.Index(destination, ":") > -1 {
log.Debugf("Streaming using ssh and untaring remotely")
serverParts := strings.Split(destination, ":")
if len(serverParts) != 2 {
return fmt.Errorf("invalid destination uri, see 'scw cp -h' for usage")
}
serverID := api.GetServerID(serverParts[0])
server, err := api.GetServer(serverID)
if err != nil {
return err
}
// remoteCommand is executed on the remote server
// it streams a tarball raw content
remoteCommand := []string{"tar"}
remoteCommand = append(remoteCommand, "-C", serverParts[1])
if os.Getenv("DEBUG") == "1" {
remoteCommand = append(remoteCommand, "-v")
}
remoteCommand = append(remoteCommand, "-xf", "-")
// execCmd contains the ssh connection + the remoteCommand
execCmd := append(utils.NewSSHExecCmd(server.PublicAddress.IP, false, remoteCommand))
log.Debugf("Executing: ssh %s", strings.Join(execCmd, " "))
spawnDst := exec.Command("ssh", execCmd...)
untarInputStream, err := spawnDst.StdinPipe()
if err != nil {
return err
}
defer untarInputStream.Close()
// spawnDst.Stderr = os.Stderr
// spawnDst.Stdout = os.Stdout
err = spawnDst.Start()
if err != nil {
return err
}
_, err = io.Copy(untarInputStream, *sourceStream)
return err
}
// destination is stdout
if destination == "-" { // stdout
log.Debugf("Writing sourceStream(%v) to os.Stdout(%v)", sourceStream, os.Stdout)
_, err := io.Copy(os.Stdout, *sourceStream)
return err
}
// destination is a path on localhost
log.Debugf("Untaring to local path: %s", destination)
err := archive.Untar(*sourceStream, destination, &archive.TarOptions{NoLchown: true})
return err
}
// TarFromSource creates a stream buffer with the tarballed content of the user source
func TarFromSource(api *api.ScalewayAPI, source string) (*io.ReadCloser, error) {
var tarOutputStream io.ReadCloser
// source is a server address + path (scp-like uri)
if strings.Index(source, ":") > -1 {
log.Debugf("Creating a tarball remotely and streaming it using SSH")
serverParts := strings.Split(source, ":")
if len(serverParts) != 2 {
return nil, fmt.Errorf("invalid source uri, see 'scw cp -h' for usage")
}
serverID := api.GetServerID(serverParts[0])
server, err := api.GetServer(serverID)
if err != nil {
return nil, err
}
dir, base := utils.PathToTARPathparts(serverParts[1])
log.Debugf("Equivalent to 'scp root@%s:%s/%s ...'", server.PublicAddress.IP, dir, base)
// remoteCommand is executed on the remote server
// it streams a tarball raw content
remoteCommand := []string{"tar"}
remoteCommand = append(remoteCommand, "-C", dir)
if os.Getenv("DEBUG") == "1" {
remoteCommand = append(remoteCommand, "-v")
}
remoteCommand = append(remoteCommand, "-cf", "-")
remoteCommand = append(remoteCommand, base)
// execCmd contains the ssh connection + the remoteCommand
execCmd := append(utils.NewSSHExecCmd(server.PublicAddress.IP, false, remoteCommand))
log.Debugf("Executing: ssh %s", strings.Join(execCmd, " "))
spawnSrc := exec.Command("ssh", execCmd...)
tarOutputStream, err = spawnSrc.StdoutPipe()
if err != nil {
return nil, err
}
tarErrorStream, err := spawnSrc.StderrPipe()
if err != nil {
return nil, err
}
defer tarErrorStream.Close()
io.Copy(os.Stderr, tarErrorStream)
err = spawnSrc.Start()
if err != nil {
return nil, err
}
defer spawnSrc.Wait()
return &tarOutputStream, nil
}
// source is stdin
if source == "-" {
log.Debugf("Streaming tarball from stdin")
tarOutputStream = os.Stdin
return &tarOutputStream, nil
}
// source is a path on localhost
log.Debugf("Taring local path %s", source)
path, err := filepath.Abs(source)
if err != nil {
return nil, err
}
path, err = filepath.EvalSymlinks(path)
if err != nil {
return nil, err
}
log.Debugf("Real local path is %s", path)
dir, base := utils.PathToTARPathparts(path)
tarOutputStream, err = archive.TarWithOptions(dir, &archive.TarOptions{
Compression: archive.Uncompressed,
IncludeFiles: []string{base},
})
if err != nil {
return nil, err
}
return &tarOutputStream, nil
}