Imports github.com/pkg/errors github.com/artyom/autoflags github.com/artyom/logger github.com/artyom/untar github.com/pkg/sftp golang.org/x/crypto/ssh Standard library imports context encoding/hex encoding/json fmt io path path/filepath strings syscall time crypto/sha256 compress/gzip os/signal io/ioutil log math/rand net os os/exec