dev-python/couchdb-python/files/0.10-exec-compat.patch

commit 8fdba0f09df00d69618858c70d11ddbeecd30026
Author: Dirkjan Ochtman <dirkjan@ochtman.nl>
Date:   Thu Jul 24 11:43:52 2014 +0200

    Use a single pyexec() utility function to fix compatibility issues
    
    While the current setup (where 2.x uses the exec statement and 3.x uses the
    exec() function) works at run-time, it causes problem while byte-compiling
    the util modules for their non-appropriate interpreter versions:
    
    File "/usr/lib64/python2.7/site-packages/couchdb/util3.py", line 17
      pyexec = exec
                  ^
    SyntaxError: invalid syntax
    
    File "/usr/lib64/python3.3/site-packages/couchdb/util2.py", line 19
      exec code in gns, lns
              ^
    SyntaxError: invalid syntax
    
    There doesn't appear to be an easy way to exclude some files from installation
    based on the installing Python version, but it turns out the 2.x exec
    statement can also take its arguments as a tuple, such that the 2.x and 3.x
    versions can be used with the same syntax.
    
    However, Python 2.7 has a bug (#21591) that prevents this from working in the
    context we use exec in (in a function that also contains a nested function),
    due to a bad implementation that enables the arguments-as-tuple functionality.
    We thus need a helper function after all, to pull it out of that context.

diff --git a/couchdb/util.py b/couchdb/util.py
index bdd52f3..d111a6b 100644
--- a/couchdb/util.py
+++ b/couchdb/util.py
@@ -4,3 +4,7 @@ if sys.version_info[0] < 3:
     from couchdb.util2 import *
 else:
     from couchdb.util3 import *
+
+def pyexec(code, gns, lns):
+    # http://bugs.python.org/issue21591
+    exec(code, gns, lns)
diff --git a/couchdb/util2.py b/couchdb/util2.py
index ad1b0a8..03fd558 100644
--- a/couchdb/util2.py
+++ b/couchdb/util2.py
@@ -1,8 +1,7 @@
 
 __all__ = [
     'StringIO', 'urlsplit', 'urlunsplit', 'urlquote', 'urlunquote',
-    'urlencode', 'utype', 'ltype', 'pyexec', 'strbase', 'funcode',
-    'urlparse',
+    'urlencode', 'utype', 'ltype', 'strbase', 'funcode', 'urlparse',
 ]
 
 utype = unicode
@@ -15,8 +14,5 @@ from urllib import quote as urlquote
 from urllib import unquote as urlunquote
 from urllib import urlencode
 
-def pyexec(code, gns, lns):
-    exec code in gns, lns
-
 def funcode(fun):
     return fun.func_code
diff --git a/couchdb/util3.py b/couchdb/util3.py
index c2e46d6..6bf84f0 100644
--- a/couchdb/util3.py
+++ b/couchdb/util3.py
@@ -1,8 +1,7 @@
 
 __all__ = [
     'StringIO', 'urlsplit', 'urlunsplit', 'urlquote', 'urlunquote',
-    'urlencode', 'utype', 'ltype', 'pyexec', 'strbase', 'funcode',
-    'urlparse',
+    'urlencode', 'utype', 'ltype', 'strbase', 'funcode', 'urlparse',
 ]
 
 utype = str
@@ -14,7 +13,5 @@ from urllib.parse import urlsplit, urlunsplit, urlencode, urlparse
 from urllib.parse import quote as urlquote
 from urllib.parse import unquote as urlunquote
 
-pyexec = exec
-
 def funcode(fun):
     return fun.__code__