feat: init nightly vuls for blackhat

pkg/util/util.go

@@ -0,0 +1,76 @@
+package util
+
+import (
+	"compress/bzip2"
+	"compress/gzip"
+	"io"
+	"os"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+	"github.com/ulikunitz/xz"
+	"golang.org/x/exp/maps"
+)
+
+func CacheDir() string {
+	cacheDir, err := os.UserCacheDir()
+	if err != nil {
+		cacheDir = os.TempDir()
+	}
+	dir := filepath.Join(cacheDir, "vuls")
+	return dir
+}
+
+func Unique[T comparable](s []T) []T {
+	m := map[T]struct{}{}
+	for _, v := range s {
+		m[v] = struct{}{}
+	}
+	return maps.Keys(m)
+}
+
+func Read(path string) ([]byte, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, errors.Wrapf(err, "open %s", path)
+	}
+	defer f.Close()
+
+	switch filepath.Ext(path) {
+	case ".gz":
+		gr, err := gzip.NewReader(f)
+		if err != nil {
+			return nil, errors.Wrap(err, "create gzip reader")
+		}
+		defer gr.Close()
+
+		bs, err := io.ReadAll(gr)
+		if err != nil {
+			return nil, errors.Wrap(err, "read data")
+		}
+		return bs, nil
+	case ".bz2":
+		bs, err := io.ReadAll(bzip2.NewReader(f))
+		if err != nil {
+			return nil, errors.Wrap(err, "read data")
+		}
+		return bs, nil
+	case ".xz":
+		xr, err := xz.NewReader(f)
+		if err != nil {
+			return nil, errors.Wrap(err, "create xz reader")
+		}
+
+		bs, err := io.ReadAll(xr)
+		if err != nil {
+			return nil, errors.Wrap(err, "read data")
+		}
+		return bs, nil
+	default:
+		bs, err := io.ReadAll(f)
+		if err != nil {
+			return nil, errors.Wrap(err, "read data")
+		}
+		return bs, nil
+	}
+}