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package compress
import (
"archive/tar"
"io"
"os"
"path/filepath"
"github.com/crc-org/crc/v2/pkg/crc/logging"
"github.com/klauspost/compress/zstd"
)
func Compress(src, dest string) (err error) {
out, err := os.Create(dest)
if err != nil {
return err
}
defer func() {
cerr := out.Close()
if err == nil {
err = cerr
}
}()
enc, err := zstd.NewWriter(out)
if err != nil {
return err
}
defer enc.Close()
tarWriter := tar.NewWriter(enc)
defer tarWriter.Close()
basePath, _ := filepath.Split(src)
// Just use top level directory as part of tarball
// $ zstdcat crc_libvirt_4.7.1_custom.zstd | tar t
// crc_libvirt_4.7.1_custom
// crc_libvirt_4.7.1_custom/test
return filepath.Walk(src, func(file string, fi os.FileInfo, err1 error) error {
if err1 != nil {
return err1
}
logging.Debugf("Adding %s", file)
header, err := tar.FileInfoHeader(fi, file)
if err != nil {
return err
}
// must provide real name
// (see https://golang.org/src/archive/tar/common.go?#L626)
header.Name, err = filepath.Rel(basePath, filepath.ToSlash(file))
if err != nil {
return err
}
if err := tarWriter.WriteHeader(header); err != nil {
return err
}
if !fi.IsDir() {
data, err := os.Open(file)
if err != nil {
return err
}
defer data.Close()
if _, err := io.Copy(tarWriter, data); err != nil {
return err
}
}
return nil
})
}
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