Support using conda to install Pylint

[brettcannon]

We will probably want to auto-select the approach based on whether a conda install is selected for the interpreter or not.

[DonJayamanne]

Scenario 1
Assume user has conda installed, and virtualenv named "X" is selected as the current env in vscode (assume this is not a conda environment).

Should we still allow the user to select conda as an option to install the module? I don't think so.
Solution - Check if the currently selected environment is a conda environment, and if it is, then allow user to select between conda and pip.

[brettcannon]

Do we even need to let the user choose? Shouldn't we just use conda for a conda environment and pip for everything else?

[DonJayamanne]

Lol, agreed.

[DonJayamanne]

Not sure whether this is the right place to start this discussion, but here goes:
Do we need to consider looking into supporting pipenv or making that optional?

Came across a blog post the other day about that being the officially recommended packaging tool from python.

[brettcannon]

I think they're referring to the fact that pipenv is recommended in the packaging.python.org docs. But considering the tool has an easter egg that compliments you for installing the author's other projects, I don't know how seriously we should take it yet.

Then again, people who use pipenv seem to like it and if we want to be on the cutting-edge then support wouldn't hurt. IOW I don't know. 😄

[garytyler]

I am not a fan of the easter egg @brettcannon mentions, but I'm working on a project that chose to use pipenv and it is a great workflow. I work on Windows, and the one issue I have come across is pipenv's lack of history buffer support in Windows cmd console: pew-org/pew#165. If I'm not mistaken, proper support in the Python plugin to direct calls to the pipenv interpreter through vscode would dodge some of the setbacks and make a significant positive impact on using pipenv in Windows, which is otherwise an unduly stunted workflow.

[brettcannon]

I'm moving the discussion of pipenv over to #404.