activate_this.py does not update PATH environment variable about virtualenv

[vbabiy]

It looks like the activate.sh shell script updates your PATH.

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Original Comment By: Kelsey Hightower

[vbabiy]

Looking at the docs, the "Using Virtualenv without bin/python" section should
give you more details on what activate_this.py does.

http://virtualenv.openplans.org/#using-virtualenv-without-bin-python

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Original Comment By: Kelsey Hightower

[dougn]

This should still update the environment to add bin (or Scripts on windows) to your PATH. This is in keeping with the principal that this activation will extend/override, but not replace a previous activation as denoted in the documentation. It will meanrly cause items to first be searched for in this environment which includes BOTH the modules, and the top level scripts.

To do otherwise causes many more problems. For instance if you use activate_this.py and then try to spawn a call to sphinx-build, it will use the executable from the old env, as that is what is on the PATH, but the module from the new env, as that is what is on the PYTHONPATH.

This is patently wrong.