Re: Changing $PATH in eshell, in a bash-like behaviour

[Andrea Crotti]

Gabriele Lanaro <gabriele.lanaro@gmail.com> writes:

> I'm trying to add an additional directory to PATH, in order to use python
> virtual environments (virtualenv).
>
> A virtual environment is a directory that contains different version of
> various programs/script in its bin directory.
>
> --- virtualenv hello ---
> hello/
>   - hello/bin
>   python
>   pip
>   easy_install
>   ...
> - hello/lib/
>   ---
>
> The problem here is tat if I add the directory /abs/path/to/hello/bin as
> the first element of PATH (using getenv/setenv), eshell modifies correctly
> the variable but doesn't prefer the commands defined in hello/bin, for
> example:
>
> eshell> which python
> /usr/bin/python
> eshell> # path modification
> eshell> echo $PATH # or getenv PATH
> /abs/path/to/hello/bin:/bin:/usr/bin:...
> eshell> which python
> /usr/bin/python
>
> If i launch the command in another way, using for example shell-command..
>
> M-! which python
> /abs/path/to/hello/bin/python
>
> So it works in the correct way.
>
> How to make eshell behaving the same way, are there any workaround I can
> do?

For python you should instead set the py-python-command, see this
article [fn:1]

For your problem maybe eshell doesn't read that variable at run time?

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[fn:1] 
http://jesselegg.com/archives/2010/03/14/emacs-python-programmers-2-virtualenv-ipython-daemon-mode/