Allow for using the "old" `source` way of activating virtual environments

[brettcannon]

Via #22270 . We would probably offer a setting to let you choose "command" or "environment variables" as how we would do virtual environment activation. We could leave the "on"/"off" option as separate so that things can (potentially) work with the dedicated "Python Terminal" command.

[github-actions]

Thanks for the feature request! We are going to give the community 60 days from when this issue was created to provide 7 👍 upvotes on the opening comment to gauge general interest in this idea. If there's enough upvotes then we will consider this feature request in our future planning. If there's unfortunately not enough upvotes then we will close this issue.

[brettcannon]

Thank you to everyone who upvoted this issue! Since the community showed interest in this feature request we will leave this issue open as something to consider implementing at some point in the future.

We do encourage people to continue 👍 the first/opening comment as it helps us prioritize our work based on what the community seems to want the most.

[EeyoreLee]

@brettcannon - hi, does it mean the terminal will auto-activated with correct conda env without the setting conda config --set auto_activate_base False. Like auto run a command conda activate xxx when the terminal is first initialized.

[brettcannon]

Like auto run a command conda activate xxx when the terminal is first initialized.

This feature request would bring back the old way of activating environments as an option. If you're asking about the current way via environment variables, then please open a Discussion.

[MicaelJarniac]

I need this! I've been using Zsh for Humans, and something about it just doesn't work at all with the new activation method. I think it's related to it running inside a headless tmux session, or something like that.

The old way worked perfectly for me.

Here's what's happening to me with this new method:

Boring stuff

❯ which python
/home/micael/.pyenv/shims/python
❯ which mypy
/home/micael/projects/playground/.venv/bin/mypy
❯ echo $VIRTUAL_ENV

❯ echo $PATH
/home/micael/.pyenv/shims:/home/micael/bin:/home/micael/.vscode/extensions/ms-python.python-2024.7.11281013/python_files/deactivate/zsh:/home/micael/projects/playground/.venv/bin:/home/micael/.pyenv/bin:/home/micael/.local/bin:/home/micael/.cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/micael/.cache/zsh4humans/v5/fzf/bin
❯ . .venv/bin/activate
❯ which python
/home/micael/projects/playground/.venv/bin/python
❯ which mypy
/home/micael/projects/playground/.venv/bin/mypy
❯ echo $VIRTUAL_ENV
/home/micael/projects/playground/.venv
❯ echo $PATH
/home/micael/projects/playground/.venv/bin:/home/micael/.pyenv/shims:/home/micael/bin:/home/micael/.vscode/extensions/ms-python.python-2024.7.11281013/python_files/deactivate/zsh:/home/micael/projects/playground/.venv/bin:/home/micael/.pyenv/bin:/home/micael/.local/bin:/home/micael/.cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/micael/.cache/zsh4humans/v5/fzf/bin

Notice how which python and echo $VIRTUAL_ENV change after manually activating the venv. I also don't get the venv indicator on my prompt without activating manually.