conda-workon 0.3.0

This is a small tool which can be used to activate conda environments. It is an alternative to using source activate <env> and instead uses a conda sub-command to spawn a new shell with the environment activated. Deactivating the environment is simply done by exiting this sub-shell. This is very similar to, and based on, the pew workon command from pew. One major advantage of this is that it does not depend on the shell you use nor does it interact with the shell at all. This means it is not restricted to bash and zsh.

Activating an environment simply looks like this:

$ conda create -n py26 python=2.6
...
$ conda info -e
# conda environments:
#
py26                     /home/flub/miniconda3/envs/py26
root                  *  /home/flub/miniconda3
$ conda workon py26
Launching subshell in conda environment.  Type "exit" or "Ctr-D" to return.
(py26) $ conda info -e
# conda environments:
#
py26                  *  /home/flub/miniconda3/envs/py26
root                     /home/flub/miniconda3
(py26) $ exit
$ conda info -e
# conda environments:
#
py26                     /home/flub/miniconda3/envs/py26
root                  *  /home/flub/miniconda3

Another feature is that it provides an easy throw-away temporary environment:

$ conda workon -t python=3.4
Fetching package metadata: ..
Solving package specifications: .
Package plan for installation in environment /tmp/tmp7ua0_le9/env:
...
Proceed ([y]/n)? y
...
Launching subshell in conda environment.  Type "exit" or "Ctr-D" to return.
$ conda info | grep default
  default environment : /tmp/tmp7ua0_le9/env
$ exit
$ conda info | grep default
  default environment : /home/flub/miniconda3
$

$ pip install conda-workon

# Show the conda environment, calculate __fish_prompt_conda only once
if set -q CONDA_DEFAULT_ENV
    if not set -q __fish_prompt_conda
        set -g __fish_prompt_conda (set_color --bold -b blue red)$CONDA_DEFAULT_ENV"$__fish_prompt_normal "
    end
    echo -n $__fish_prompt_conda
end