migrate to github.com/moby/go-archive module

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/moby/go-archive/xattr_supported.go

@@ -0,0 +1,52 @@
+//go:build linux || darwin || freebsd || netbsd
+
+package archive
+
+import (
+	"errors"
+	"fmt"
+	"io/fs"
+
+	"golang.org/x/sys/unix"
+)
+
+// lgetxattr retrieves the value of the extended attribute identified by attr
+// and associated with the given path in the file system.
+// It returns a nil slice and nil error if the xattr is not set.
+func lgetxattr(path string, attr string) ([]byte, error) {
+	// Start with a 128 length byte array
+	dest := make([]byte, 128)
+	sz, err := unix.Lgetxattr(path, attr, dest)
+
+	for errors.Is(err, unix.ERANGE) {
+		// Buffer too small, use zero-sized buffer to get the actual size
+		sz, err = unix.Lgetxattr(path, attr, []byte{})
+		if err != nil {
+			return nil, wrapPathError("lgetxattr", path, attr, err)
+		}
+		dest = make([]byte, sz)
+		sz, err = unix.Lgetxattr(path, attr, dest)
+	}
+
+	if err != nil {
+		if errors.Is(err, noattr) {
+			return nil, nil
+		}
+		return nil, wrapPathError("lgetxattr", path, attr, err)
+	}
+
+	return dest[:sz], nil
+}
+
+// lsetxattr sets the value of the extended attribute identified by attr
+// and associated with the given path in the file system.
+func lsetxattr(path string, attr string, data []byte, flags int) error {
+	return wrapPathError("lsetxattr", path, attr, unix.Lsetxattr(path, attr, data, flags))
+}
+
+func wrapPathError(op, path, attr string, err error) error {
+	if err == nil {
+		return nil
+	}
+	return &fs.PathError{Op: op, Path: path, Err: fmt.Errorf("xattr %q: %w", attr, err)}
+}