def clean_tarinfo(ti, mtime=None):
"""Clean metadata from a TarInfo object to make it more reproducible.
- Set uid & gid to 0
- Set uname and gname to ""
- Normalise permissions to 644 or 755
- Set mtime if not None
"""
ti = copy(ti)
ti.uid = 0
ti.gid = 0
ti.uname = ''
ti.gname = ''
ti.mode = common.normalize_file_permissions(ti.mode)
if mtime is not None:
ti.mtime = mtime
return ti
def test_normalize_file_permissions():
assert normalize_file_permissions(0o100664) == 0o100644 # regular file
assert normalize_file_permissions(0o40775) == 0o40755 # directory