Merge branch 'dev' into 3.9

README.rst

@@ -24,7 +24,6 @@ The following standard library modules are available on macOS, but not the other
 Apple platforms:
     * curses
     * posixshmem
-    * posixsubprocess
 
 The binaries support x86_64 and arm64 for macOS; arm64 for iOS and appleTV
 devices; and arm64_32 for watchOS. It also supports device simulators on both

patch/Python/Python.patch

@@ -699,7 +699,7 @@ index f3828b10e1..7e86539bfa 100644
                                  + _CASE_INSENSITIVE_PLATFORMS_STR_KEY)
 
 diff --git a/Lib/os.py b/Lib/os.py
-index b794159f86..449cf932b6 100644
+index b794159f86..78aab1ea2a 100644
 --- a/Lib/os.py
 +++ b/Lib/os.py
 @@ -36,7 +36,7 @@
@@ -716,7 +716,7 @@ index b794159f86..449cf932b6 100644
  del _fscodec
 
 +
-+if sys.platform in ('iOS', 'tvos', 'watchos'):
++if sys.platform in ('ios', 'tvos', 'watchos'):
 +    allows_subprocesses = False
 +else:
 +    allows_subprocesses = True
@@ -834,74 +834,20 @@ index 9e617afb00..41305298d3 100644
      return f'{userbase}/lib/python{version[0]}.{version[1]}/site-packages'
 
 diff --git a/Lib/subprocess.py b/Lib/subprocess.py
-index 4effc1d8b3..70e69c2379 100644
+index 4effc1d8b3..b0e4a5acac 100644
 --- a/Lib/subprocess.py
 +++ b/Lib/subprocess.py
-@@ -75,9 +75,13 @@
-     _mswindows = True
- except ModuleNotFoundError:
-     _mswindows = False
--    import _posixsubprocess
--    import select
--    import selectors
-+    try:
-+        import _posixsubprocess
-+        import select
-+        import selectors
-+    except ModuleNotFoundError:
-+        # iOS *has* subprocesses, but doesn't support them.
-+        _posixsubprocess = None
- else:
-     from _winapi import (CREATE_NEW_CONSOLE, CREATE_NEW_PROCESS_GROUP,
-                          STD_INPUT_HANDLE, STD_OUTPUT_HANDLE,
-@@ -212,7 +216,7 @@
-             return "%s(%d)" % (self.__class__.__name__, int(self))
-
-         __del__ = Close
--else:
-+elif _posixsubprocess:
-     # When select or poll has indicated that the file is writable,
-     # we can write up to _PIPE_BUF bytes without risk of blocking.
-     # POSIX defines PIPE_BUF as >= 512.
-@@ -240,7 +244,7 @@
-
-     def _cleanup():
-         pass
--else:
-+elif _posixsubprocess:
-     # This lists holds Popen instances for which the underlying process had not
-     # exited at the time its __del__ method got called: those processes are
-     # wait()ed for synchronously from _cleanup() when a new Popen object is
-@@ -259,6 +263,9 @@
-                     # This can happen if two threads create a new Popen instance.
-                     # It's harmless that it was already removed, so ignore.
-                     pass
-+else:
-+    def _cleanup():
-+        pass
-
- PIPE = -1
- STDOUT = -2
-@@ -660,7 +667,7 @@
-     Prefer an implementation which can use vfork() in some cases for best
-     performance.
-     """
--    if _mswindows or not hasattr(os, 'posix_spawn'):
-+    if _mswindows or _posixsubprocess is None or not hasattr(os, 'posix_spawn'):
-         # os.posix_spawn() is not available
-         return False
-
-@@ -762,6 +769,9 @@
+@@ -762,6 +762,9 @@
                   pass_fds=(), *, user=None, group=None, extra_groups=None,
                   encoding=None, errors=None, text=None, umask=-1):
          """Create new Popen instance."""
-+        if not _mswindows and _posixsubprocess is None:
++        if not os.allows_subprocesses:
 +            raise RuntimeError(f"Subprocesses are not supported on {sys.platform}")
 +
          _cleanup()
          # Held while anything is calling waitpid before returncode has been
          # updated to prevent clobbering returncode if wait() or poll() are
-@@ -1834,7 +1844,7 @@
+@@ -1834,7 +1837,7 @@
              else:
                  self.returncode = waitstatus_to_exitcode(sts)
 
@@ -910,7 +856,7 @@ index 4effc1d8b3..70e69c2379 100644
                  _WNOHANG=os.WNOHANG, _ECHILD=errno.ECHILD):
              """Check if child process has terminated.  Returns returncode
              attribute.
-@@ -1843,6 +1853,8 @@
+@@ -1843,6 +1846,8 @@
              outside of the local scope (nor can any methods it calls).
 
              """

patch/Python/Setup.embedded

@@ -36,6 +36,7 @@ _multiprocessing _multiprocessing/multiprocessing.c _multiprocessing/semaphore.c
 _opcode _opcode.c
 _operator _operator.c
 _pickle _pickle.c -DPy_BUILD_CORE_MODULE
+_posixsubprocess _posixsubprocess.c
 _queue _queuemodule.c
 _random _randommodule.c -DPy_BUILD_CORE_MODULE
 _sha1 sha1module.c

patch/Python/Setup.macOS

@@ -37,7 +37,6 @@ _decimal _decimal/_decimal.c \
     -DCONFIG_64=1 -DANSI=1 -DHAVE_UINT128_T=1
 
 _posixshmem -I$(srcdir)/Modules/_multiprocessing _multiprocessing/posixshmem.c
-_posixsubprocess _posixsubprocess.c
 
 _scproxy _scproxy.c -framework SystemConfiguration -framework CoreFoundation
 

tests/testbed/pyproject.toml

@@ -21,6 +21,7 @@ requires = [
     "std-nslog",
 ]
 support_package = "../../dist/Python-3.9-macOS-support.custom.tar.gz"
+template = "../../../../templates/briefcase-macOS-Xcode-template"
 
 [tool.briefcase.app.testbed.linux]
 supported = false
@@ -35,6 +36,7 @@ requires = [
     "std-nslog",
 ]
 support_package = "../../dist/Python-3.9-iOS-support.custom.tar.gz"
+template = "../../../../templates/briefcase-iOS-Xcode-template"
 
 [tool.briefcase.app.testbed.android]
 supported = false

tests/testbed/src/testbed/app.py

@@ -48,11 +48,11 @@ def main():
                 print(f"{sys_platform}: {test.__name__}", end="...")
             test()
             print(" ok")
-        except Exception as e:
+        except Exception:
             failures += 1
             print(" FAILED!")
             print("-" * 80)
-            traceback.print_exception(e)
+            traceback.print_exc()
             print("-" * 80)
 
     print("=" * 80)