move download into util.files

cibuildwheel/util/files.py

@@ -5,12 +5,17 @@
 import contextlib
 import os
 import shutil
+import ssl
 import tarfile
+import urllib.request
 from dataclasses import dataclass
 from pathlib import Path
+from time import sleep
 from typing import Generator
 from zipfile import ZipFile
 
+import certifi
+
 
 def extract_zip(zip_src: Path, dest: Path) -> None:
     """Extracts a zip and correctly sets permissions on extracted files.
@@ -39,6 +44,29 @@ def extract_tar(tar_src: Path, dest: Path) -> None:
         tar_.extractall(dest)
 
 
+def download(url: str, dest: Path) -> None:
+    print(f"+ Download {url} to {dest}")
+    dest_dir = dest.parent
+    if not dest_dir.exists():
+        dest_dir.mkdir(parents=True)
+
+    # we've had issues when relying on the host OS' CA certificates on Windows,
+    # so we use certifi (this sounds odd but requests also does this by default)
+    cafile = os.environ.get("SSL_CERT_FILE", certifi.where())
+    context = ssl.create_default_context(cafile=cafile)
+    repeat_num = 3
+    for i in range(repeat_num):
+        try:
+            with urllib.request.urlopen(url, context=context) as response:
+                dest.write_bytes(response.read())
+                return
+
+        except OSError:
+            if i == repeat_num - 1:
+                raise
+            sleep(3)
+
+
 def move_file(src_file: Path, dst_file: Path) -> Path:
     """Moves a file safely while avoiding potential semantic confusion:
 

cibuildwheel/util/misc.py

@@ -7,25 +7,21 @@
 import re
 import shlex
 import shutil
-import ssl
 import subprocess
 import sys
 import textwrap
 import time
 import typing
-import urllib.request
 from collections import defaultdict
 from collections.abc import Generator, Iterable, Mapping, MutableMapping, Sequence
 from dataclasses import dataclass
 from enum import Enum
 from functools import lru_cache
 from pathlib import Path, PurePath
 from tempfile import TemporaryDirectory
-from time import sleep
 from typing import Any, ClassVar, Final, Literal, TextIO, TypeVar
 
 import bracex
-import certifi
 from filelock import FileLock
 from packaging.requirements import InvalidRequirement, Requirement
 from packaging.specifiers import SpecifierSet
@@ -36,7 +32,7 @@
 from .._compat import tomllib
 from ..architecture import Architecture
 from ..typing import PathOrStr, PlatformName
-from .files import FileReport, extract_tar, extract_zip
+from .files import FileReport, download, extract_tar, extract_zip
 
 resources_dir: Final[Path] = Path(__file__).parents[1] / "resources"
 
@@ -302,29 +298,6 @@ def __getattr__(self, attr: str) -> Any:
         return getattr(self.stream, attr)
 
 
-def download(url: str, dest: Path) -> None:
-    print(f"+ Download {url} to {dest}")
-    dest_dir = dest.parent
-    if not dest_dir.exists():
-        dest_dir.mkdir(parents=True)
-
-    # we've had issues when relying on the host OS' CA certificates on Windows,
-    # so we use certifi (this sounds odd but requests also does this by default)
-    cafile = os.environ.get("SSL_CERT_FILE", certifi.where())
-    context = ssl.create_default_context(cafile=cafile)
-    repeat_num = 3
-    for i in range(repeat_num):
-        try:
-            with urllib.request.urlopen(url, context=context) as response:
-                dest.write_bytes(response.read())
-                return
-
-        except OSError:
-            if i == repeat_num - 1:
-                raise
-            sleep(3)
-
-
 class DependencyConstraints:
     def __init__(self, base_file_path: Path):
         assert base_file_path.exists()