From ba91d952d977b285f79351c4b100d230c155cf23 Mon Sep 17 00:00:00 2001
From: Thomas Kluyver <thomas@kluyver.me.uk>
Date: Sat, 28 Aug 2021 10:27:08 +0100
Subject: [PATCH] Remove compatibility code for Python < 3.6

---
 flit_core/flit_core/wheel.py | 51 +++---------------------------------
 1 file changed, 4 insertions(+), 47 deletions(-)

diff --git a/flit_core/flit_core/wheel.py b/flit_core/flit_core/wheel.py
index afb752cf..b3c9eef4 100644
--- a/flit_core/flit_core/wheel.py
+++ b/flit_core/flit_core/wheel.py
@@ -10,20 +10,8 @@
 import stat
 import sys
 import tempfile
-try:
-    from types import SimpleNamespace  # Python 3
-except ImportError:
-    from argparse import Namespace as SimpleNamespace  # Python 2
-
-HAVE_ZIPFILE36 = True
-if sys.version_info >= (3, 6):
-    import zipfile
-else:
-    try:
-        import zipfile36 as zipfile
-    except ImportError:
-        import zipfile
-        HAVE_ZIPFILE36 = False
+from types import SimpleNamespace
+import zipfile
 
 from flit_core import __version__
 from . import common
@@ -62,13 +50,7 @@ def __init__(self, directory, module, metadata, entrypoints, target_fp):
             # If SOURCE_DATE_EPOCH is set (e.g. by Debian), it's used for
             # timestamps inside the zip file.
             d = datetime.utcfromtimestamp(int(os.environ['SOURCE_DATE_EPOCH']))
-            if HAVE_ZIPFILE36:
-                log.info("Zip timestamps will be from SOURCE_DATE_EPOCH: %s", d)
-            else:
-                log.warning(
-                    "Can't use timestamp from SOURCE_DATE_EPOCH: "
-                    "Need Python >= 3.6 or the zipfile36 backport for this."
-                )
+            log.info("Zip timestamps will be from SOURCE_DATE_EPOCH: %s", d)
             # zipfile expects a 6-tuple, not a datetime object
             self.source_time_stamp = (d.year, d.month, d.day, d.hour, d.minute, d.second)
         except (KeyError, ValueError):
@@ -101,30 +83,7 @@ def wheel_filename(self):
         tag = ('py2.' if self.metadata.supports_py2 else '') + 'py3-none-any'
         return '{}-{}.whl'.format(dist_name, tag)
 
-    def _add_file_old(self, full_path, rel_path):
-        log.debug("Adding %s to zip file", full_path)
-        full_path, rel_path = str(full_path), str(rel_path)
-        if os.sep != '/':
-            # We always want to have /-separated paths in the zip file and in
-            # RECORD
-            rel_path = rel_path.replace(os.sep, '/')
-
-        self.wheel_zip.write(full_path, arcname=rel_path)
-
-        hashsum = hashlib.sha256()
-        with open(full_path, 'rb') as src:
-            while True:
-                buf = src.read(1024 * 8)
-                if not buf:
-                    break
-                hashsum.update(buf)
-
-        size = os.stat(full_path).st_size
-        hash_digest = urlsafe_b64encode(hashsum.digest()).decode(
-            'ascii').rstrip('=')
-        self.records.append((rel_path, hash_digest, size))
-
-    def _add_file_zf36(self, full_path, rel_path):
+    def _add_file(self, full_path, rel_path):
         log.debug("Adding %s to zip file", full_path)
         full_path, rel_path = str(full_path), str(rel_path)
         if os.sep != '/':
@@ -161,8 +120,6 @@ def _add_file_zf36(self, full_path, rel_path):
         hash_digest = urlsafe_b64encode(hashsum.digest()).decode('ascii').rstrip('=')
         self.records.append((rel_path, hash_digest, size))
 
-    _add_file = _add_file_zf36 if HAVE_ZIPFILE36 else _add_file_old
-
     @contextlib.contextmanager
     def _write_to_zip(self, rel_path, mode=0o644):
         sio = io.StringIO()