conda-workon 0.4.0

这是一个小工具，可用于激活conda环境。它是使用source activate <env>的替代品，而是使用conda子命令来启动一个新的shell，并激活环境。通过退出此子shell来停止环境激活。这与来自pew的

pew workon

激活环境看起来就像这样

$ 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

可以使用conda workon -l|--list或使用标准的conda env list或conda info -e|--envs来列出可用的环境。

另一个功能是，它可以根据命令行上的包规范提供一个简单的临时环境

$ conda worktmp python=3.4 sphinx
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
$

同样，可以从environment.yml文件创建临时环境

$ conda worktmp -f path/to/environment.yml
...
Launching subshell in conda environment.  Type "exit" or "Ctr-D" to return.

如果使用不带参数的-f|--file，则会在当前目录中查找environment.yml。当使用worktmp时，也可以通过使用-e|--editable选项直接调用pip -e <path>。这对于开始开发包来说很方便

$ conda worktmp -f -e.
...
Proceed ([y]/n)? y
...
  Running setup.py develop for foo
Successfully installed foo
Launching subshell in conda environment.  Type "exit" or "Ctr-D" to return.
$

$ pip install conda-workon

conda config --add channels conda-forge
conda 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