Activating a conda environment using `conda` instead of `source`

[eyadsibai]

Environment data

• VS Code version: 1.23.1
• Extension version (available under the Extensions sidebar): 2018.5.0
• OS and version: Linux Manjaro 4.16.13-1
• Python version (& distribution if applicable, e.g. Anaconda): 3.6.3 / conda version: 4.5.2
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): conda

Actual behavior

I am using the zsh shell. When I create a new python terminal it uses source activate 'name_of_environment'

Expected behavior

I am using the zsh shell. When I create a new python terminal it uses conda activate 'name_of_environment

Steps to reproduce:

1. install latest conda
2. add ". /etc/profile.d/conda.sh" to your .zshrc file as recommended by any conda version after 4.4
3. try to create a new python terminal within vscode whille the activateEnviroment setting is true

[DonJayamanne]

Further info can be found here:

conda/conda#6639

https://github.com/conda/conda/blob/a4c4feae404b2b378e106bd25f62cc8be15c768f/CHANGELOG.md#440-2017-12-20

[brettcannon]

Re-classifying as an enhancement since the old ways still work, they have simply introduced a new way of doing this.

[eyadsibai]

the old way doesn't work for me. If I am following the new way of adding the conda to the environment, the old way doesn't work anymore.

I am getting an error:
source: no such file or directory: activate

[brettcannon]

Anaconda's shell scripts that they have you source as part of the new approach must be clobbering something then.

The problem is that we can't leave old users behind and blindly cut over to this new approach, so if we're going to support both we are going to have to add detection code for what version of Anaconda someone is using which complicates things.

[brettcannon]

@eyadsibai BTW, if you need to shut off our automatic activation then see https://code.visualstudio.com/docs/python/environments#_activate-an-environment-in-the-terminal for the python.terminal.activateEnvironment.

[brettcannon]

Another snafu in all of this is that this new approach is only documented for UNIX-based operating systems and not for Windows at all.