Should handle pip requirements with relative paths

[pytoxbot]

• Bitbucket: https://bitbucket.org/hpk42/tox/issue/102
• Originally reported by: @generalov
• Originally created at: 2013-06-07T11:38:02.850

tox executes 'pip install' with changing cwd to envlogdir (.tox/py27/log)

If tox.ini takes deps from requirements.txt file and it contains relative paths installation will failed.

requirements.txt

-e lib/python-package

tox.ini

[testenv]
deps = -r{toxinidir}/requirements.txt

/tmp/prj/$ tox -e py27 -v

 ....  
/tmp/prj/.tox/py27/log$ /tmp/prj/.tox/py27/bin/pip install --download-cache=/tmp/.pip/cache -r/tmp/prj/requirements.txt >/tmp/prj/.tox/py27/log/py27-1.log  
ERROR: invocation failed, logfile: /tmp/prj/.tox/py27/log/py27-1.log  
ERROR: actionid=py27  
..  
lib/python-package should either by a path to a local project or a VCS url beginning with svn+, git+, hg+, or bzr+

When I run same command from console installation success:

/tmp/prj/$ /tmp/prj/.tox/py27/bin/pip install --download-cache=/tmp/.pip/cache django==1.4 -r/tmp/prj/requirements.txt

I suggest tox should not change cwd when runs pip install

[pytoxbot]

Original comment by @hpk42

fix issue102: change to {toxinidir} when installing packages and dependencies.
this allows to use relative path like in "-rrequirements.txt".

→ <<cset 10157852d890>>