Bug: cookbook python conflicts with this cookbook

[thmttch]

If you run include both python (the "standard" one; there might be others, but this is the only one I know of) and this cookbook, what happens is that python tries to upgrade setuptools (it appears because the version of setuptools installed by anaconda differs/is less than the latest). This will cause the chef-run to fail with an error, something like:

Recipe: python::pip                                                                                                                                                [3947/8999]
  * cookbook_file[/var/chef/cache/get-pip.py] action create (skipped due to not_if)
  * execute[install-pip] action run (skipped due to not_if)
  * python_pip[setuptools] action upgrade
================================================================================
Error executing action `upgrade` on resource 'python_pip[setuptools]'
================================================================================


Mixlib::ShellOut::ShellCommandFailed
------------------------------------
Expected process to exit with [0], but received '1'
---- Begin output of pip install  --upgrade setuptools ----
STDOUT: Downloading/unpacking setuptools from https://pypi.python.org/packages/3.4/s/setuptools/setuptools-5.7-py2.py3-none-any.whl#md5=94eedce8d9b793d4affa4a85cd45edfa
Installing collected packages: setuptools
  Found existing installation: setuptools 3.6
Cleaning up...
Cannot remove entries from nonexistent file /opt/anaconda/2.0.1/lib/python2.7/site-packages/easy-install.pth
Storing debug log for failure in /home/ubuntu/.pip/pip.log
STDERR:
---- End output of pip install  --upgrade setuptools ----
Ran pip install  --upgrade setuptools returned 1


Cookbook Trace:
---------------
/var/chef/cache/cookbooks/python/providers/pip.rb:158:in `pip_cmd'
/var/chef/cache/cookbooks/python/providers/pip.rb:139:in `install_package'
/var/chef/cache/cookbooks/python/providers/pip.rb:144:in `upgrade_package'
/var/chef/cache/cookbooks/python/providers/pip.rb:60:in `block (2 levels) in class_from_file'
/var/chef/cache/cookbooks/python/providers/pip.rb:58:in `block in class_from_file'


Resource Declaration:
---------------------
# In /var/chef/cache/cookbooks/python/recipes/pip.rb

 50: python_pip 'setuptools' do
 51:   action :upgrade
 52:   version node['python']['setuptools_version']
 53: end


Compiled Resource:
------------------
# Declared in /var/chef/cache/cookbooks/python/recipes/pip.rb:50:in `from_file'

python_pip("setuptools") do
  action [:upgrade]
  retries 0
  retry_delay 2
  cookbook_name "python"
  recipe_name "pip"
  package_name "setuptools"
  options " --upgrade"
  timeout 900
end


[2014-09-07T20:31:57+00:00] ERROR: Running exception handlers
[2014-09-07T20:31:57+00:00] ERROR: Exception handlers complete
[2014-09-07T20:31:57+00:00] FATAL: Stacktrace dumped to /var/chef/cache/chef-stacktrace.out
Chef Client failed. 4 resources updated
[2014-09-07T20:31:57+00:00] ERROR: python_pip[setuptools] (python::pip line 50) had an error: Mixlib::ShellOut::ShellCommandFailed: Expected process to exit with [0], but rec
eived '1'
---- Begin output of pip install  --upgrade setuptools ----
STDOUT: Downloading/unpacking setuptools from https://pypi.python.org/packages/3.4/s/setuptools/setuptools-5.7-py2.py3-none-any.whl#md5=94eedce8d9b793d4affa4a85cd45edfa
Installing collected packages: setuptools
  Found existing installation: setuptools 3.6
Cleaning up...
Cannot remove entries from nonexistent file /opt/anaconda/2.0.1/lib/python2.7/site-packages/easy-install.pth
Storing debug log for failure in /home/ubuntu/.pip/pip.log
STDERR:
---- End output of pip install  --upgrade setuptools ----
Ran pip install  --upgrade setuptools returned 1

For now, the best workaround is to use chef-rewind to remove that resource, but this requires the user to know to include the workaround recipe (and can break other stuff). Clearly a hack.

This is just a hypothesis; comments, feedback, logs, new/better ideas, etc are appreciated!

[stxlvt]

See pypa/pip#2751