Custom prompt inside non-Python virtual environment

[jdholtz]

Hey everyone. I currently have a project that implements a similar concept to Python's virtualenv but for Arch Linux's Pacman (found here). It changes the prompt in the same way virtualenv does. Currently, a user is having an issue with the prompt change not appearing when using my project.

I looked at how Starship customizes prompts and it appears to use the VIRTUAL_ENV environment variable. However, it also displays the Python version too, which doesn't make sense for my project. How can I customize the prompt to display something similar to virtualenv without it needing to be directly handled in Starship? Thanks!

[davidkna]

Without an official module in starship, a custom or an env_var can likely achieve this, e.g.:

[env_vars."_PACMAN_VENV"]
format = "Pacman Env [$env_value]($style) "

In general, the details of how the prompt is shown differ from shell-to-shell. For instance, on bash the PS1-value is replaced where with zsh the PROMPT is not changed after initial set-up.

[jdholtz]

The custom configuration section works perfectly for this. Thanks!

To note, I did the following for Bash:

[custom.pacman_venv]
command = '''basename "${_PACMAN_VENV}"'''
when = '''[[ -n "${_PACMAN_VENV}" ]]'''
format = '[\[$output\] ]($style)'

[davidkna]

You might want to use detect_extensions instead of when for better performance and explicitly set the shell because it implicitly uses the current shell.