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diff --git a/swh/core/tarball.py b/swh/core/tarball.py
--- a/swh/core/tarball.py
+++ b/swh/core/tarball.py
@@ -166,6 +166,13 @@
_unpack_zip(tarpath, dest)
else:
raise
+ except NotADirectoryError:
+ if format and "tar" in format:
+ # some old tarballs might fail to be unpacked by shutil.unpack_archive,
+ # fallback using the tar command as last resort
+ _unpack_tar(tarpath, dest)
+ else:
+ raise
normalize_permissions(dest)
diff --git a/swh/core/tests/test_tarball.py b/swh/core/tests/test_tarball.py
--- a/swh/core/tests/test_tarball.py
+++ b/swh/core/tests/test_tarball.py
@@ -4,8 +4,10 @@
# See top-level LICENSE file for more information
import hashlib
+import io
import os
import shutil
+import tarfile
import pytest
@@ -198,21 +200,38 @@
assert file.stat().st_mode == 0o100644
-def test_unpcompress_zip_imploded(tmp_path, datadir):
- """Unpack a zip archive with compression type 6 (implode),
- not supported by python zipfile module.
-
- """
- filename = "msk316src.zip"
- zippath = os.path.join(datadir, "archives", filename)
-
- assert os.path.exists(zippath)
+def uncompress_archive_test(archive_path, tmp_path):
+ assert os.path.exists(archive_path)
- extract_dir = os.path.join(tmp_path, filename)
+ extract_dir = os.path.join(tmp_path, "unpack", os.path.basename(archive_path))
+ tarball.uncompress(archive_path, extract_dir)
+ assert len(os.listdir(extract_dir)) > 0
- tarball.uncompress(zippath, extract_dir)
- assert len(os.listdir(extract_dir)) > 0
+def test_uncompress_tar_fallback_when_unpack_archive_failed(tmp_path):
+ """shutil.unpack_archive can fail unpacking a tarball with missing
+ directory bit set on folder contained in it while the tar command
+ succeeds to perform the same task so check the fallback of using
+ tar command works for such edge case.
+ """
+ archive_path = os.path.join(tmp_path, "repro.tar.gz")
+ tf = tarfile.open(archive_path, "w:gz")
+ ti = tarfile.TarInfo("dir")
+ ti.mode = 0o777
+ ti.type = tarfile.DIRTYPE
+ tf.addfile(ti)
+ ti = tarfile.TarInfo("dir/file")
+ tf.addfile(ti, io.BytesIO(b"hello world"))
+ tf.close()
+ uncompress_archive_test(archive_path, tmp_path)
+
+
+def test_uncompress_zip_imploded(tmp_path, datadir):
+ """Unpack a zip archive with compression type 6 (implode),
+ not supported by python zipfile module.
+ """
+ archive_path = os.path.join(datadir, "archives", "msk316src.zip")
+ uncompress_archive_test(archive_path, tmp_path)
def test_uncompress_upper_archive_extension(tmp_path, datadir):

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