kompress.ZipPath: support stat().st_mtime

my/core/kompress.py

@@ -3,6 +3,7 @@ Various helpers for compression
 """
 from __future__ import annotations
 
+from datetime import datetime
 import pathlib
 from pathlib import Path
 import sys
@@ -198,3 +199,22 @@ class ZipPath(ZipPathBase):
 
     def __hash__(self) -> int:
         return hash((self.filepath, self.subpath))
+
+    def stat(self) -> os.stat_result:
+        # NOTE: zip datetimes have no notion of time zone, usually they just keep local time?
+        # see https://en.wikipedia.org/wiki/ZIP_(file_format)#Structure
+        dt = datetime(*self.root.getinfo(str(self.subpath)).date_time)
+        ts = int(dt.timestamp())
+        params = dict(
+            st_mode=0,
+            st_ino=0,
+            st_dev=0,
+            st_nlink=1,
+            st_uid=1000,
+            st_gid=1000,
+            st_size=0,  # todo compute it properly?
+            st_atime=ts,
+            st_mtime=ts,
+            st_ctime=ts,
+        )
+        return os.stat_result(tuple(params.values()))

tests/core/test_kompress.py

@@ -1,3 +1,4 @@
+from datetime import datetime
 import lzma
 from pathlib import Path
 import sys
@@ -115,3 +116,10 @@ def test_zippath() -> None:
     iterdir_res = list((zp / 'gdpr_export').iterdir())
     assert len(iterdir_res) == 3
     assert all(isinstance(p, Path) for p in iterdir_res)
+
+    # date recorded in the zip archive
+    assert (zp / 'gdpr_export/comments/comments.json').stat().st_mtime > 1625000000
+    # TODO ugh.
+    # unzip -l shows the date  as 2021-07-01 09:43
+    # however, python reads it as 2021-07-01 01:43 ??
+    # don't really feel like dealing with this for now, it's not tz aware anyway