lang/python{27,3*}: Backport patch in upstream issue20397

In certain situations, file references (.py[co]) for Python files that
fail to compile with compileall() are still added to distutils --record
output.

This output is used for pkg-plist generation and must only contain
references to files that will be installed.

One example of a failure condition is when a Python 2/3 compatible
package containing a file containing Python 3.x only code is built with
Python 2.x, such as Gunicorn's _gaiohttp.py [1]

This change backports patches submitted against upstream issue 20397 [2]
that has not yet been committed.

 - For Python 2.7 and 3.5, backport both install_lib and test
 - For Python 3.2, 3.3 and 3.4, only backport install_lib

[1] https://svnweb.freebsd.org/changeset/ports/404558
[2] https://bugs.python.org/issue20397

Thank you to Brendan Molloy for producing and submitting the patches
against upstream sources.

Reviewed by:		sbz (python)
MFH:			2016Q1
Differential Revision:	D4832

1 files changed, 35 insertions, 0 deletions

diff --git a/lang/python34/files/patch-Lib_distutils_command_install__lib.py b/lang/python34/files/patch-Lib_distutils_command_install__lib.py
new file mode 100644
index 000000000000..78b107068ec0
--- /dev/null
+++ b/lang/python34/files/patch-Lib_distutils_command_install__lib.py
@@ -0,0 +1,35 @@
+From 9934ce31b8447667f71c211e559a8de71e8263db Mon Sep 17 00:00:00 2001
+From: Brendan Molloy <brendan@bbqsrc.net>
+Date: Mon, 4 Jan 2016 23:14:06 +1100
+Subject: [PATCH] Check bytecode file actually exists and tests
+
+Should solve issue 20397, where using the --record argument results
+in files that failed to generate bytecode files are added to the
+record file nonetheless.
+
+--- Lib/distutils/command/install_lib.py.orig	2016-01-08 12:38:49 UTC
++++ Lib/distutils/command/install_lib.py
+@@ -165,11 +165,19 @@ class install_lib(Command):
+             if ext != PYTHON_SOURCE_EXTENSION:
+                 continue
+             if self.compile:
+-                bytecode_files.append(importlib.util.cache_from_source(
+-                    py_file, debug_override=True))
++                candidate = importlib.util.cache_from_source(
++                    py_file, debug_override=True)
++
++            if os.path.isfile(candidate):
++                bytecode_files.append(candidate)
++
+             if self.optimize > 0:
+-                bytecode_files.append(importlib.util.cache_from_source(
+-                    py_file, debug_override=False))
++                candidate = importlib.util.cache_from_source(
++                    py_file, debug_override=False)
++
++            if os.path.isfile(candidate):
++                bytecode_files.append(candidate)
++
+ 
+         return bytecode_files
+