[TIP] distributed testing fixes (execnet-1.0.8 and a green experiment)

[holger krekel]

hi all, 

see below for one and a half execnet releases which fix some 
issues that were originally registered as py.test ones,
namely rsync issues with symbolic links and permissions. 

You can do "pip -U execnet" or "pip -U pytest-xdist" to make sure
you have the latest of everything. ("easy_install" is fine as well). 

best,
holger


----- Forwarded message from holger krekel <holger at merlinux.eu> -----

Date: Sat, 31 Jul 2010 00:34:04 +0200
From: holger krekel <holger at merlinux.eu>
To: execnet-dev at codespeak.net,
	python announce <python-announce-list at python.org>
User-Agent: Mutt/1.5.17+20080114 (2008-01-14)
Subject: [execnet-dev] execnet-1.0.8 and a green experiment


I just released execnet-1.0.8, see the Changelog for details, below.

What is execnet? 
---------------------

execnet is a small pure python library that manages distributed code execution
across Python versions and host boundaries.  It provides a self-bootstrapping
share-nothing model with channels to send/receive data messages. It also 
helps with managing a cluster of (local or remote) processes and comes 
with tons of examples and API docs: 

    http://codespeak.net/execnet

green version of execnet 
--------------------------------

For those interested i hacked up a green version of execnet
which is API-compatible (and less stable) than the "main"
version which relies on operating system threads.  The green version
requires the eventlet library and is thus not fully 
self-bootstrapping (you need to install eventlet on all remote nodes
you want to execute code on).  There is no release but you can peruse

   http://code.google.com/p/execnet-green/source/checkout  

and "python setup.py develop" to play with it.  It will never spawn 
any operating system threads.  Rather remote_exec() will spawn 
greenlets/micro-threads of which you can easily have a few thousand.  
It probably only is stable enough for simple scenarios at this point. 

best,
holger

Changelog 1.0.8 (compared to 1.0.7):

- new ``gateway.remote_exec(func, **kwargs)`` style fo executing
  a pure function with parameters.  The function on the remote
  side also needs to accept a ``channel`` which allows it to
  communicate back and forth.  Thanks to Ronny Pfannschmidt
  for implementing it with special kudos to Maciej Fijalkowski
  for writing a "pure-function" checker so that on Python2.6
  onwards non-pure functions will be rejected.

- enhance rsyncing to also sync permissions (stat().st_mode) 
  of directories and files. 
  (should also resolve http://bitbucket.org/hpk42/py-trunk/issue/68/)

- fix rsyncing of symlinks, thanks to Charles Solar 
  (should also resolve http://bitbucket.org/hpk42/py-trunk/issue/70/)

- update internal usage of apipkg to 1.0b6

- remote_exec(module) now makes sure that the linecache is updated
  before reading and sending the source.  thanks Ronny, Matt. 

- removed all trailing whitespace from source files
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