How is %12v expanded to the virtual env name?

[NightMachinery]

I am trying to figure out how the virtual env name is being added to my prompt so that I can change it manually. But I can't find the docs on how %12v is expanded to the virtual env name.

[mafredri]

I'm interested in how you ran into this issue. We used psvar[12] to (try to) avoid collisions 😄.

From zsh manual:

       psvar <S> <Z> (PSVAR <S>)
              An array (colon-separated list) whose elements can be used in PROMPT strings.  Setting psvar also sets PSVAR, and vice versa.

See here for how we set it:

pure/pure.zsh

Lines 216 to 237 in 3b2606d

	# Check if we should display the virtual env. We use a sufficiently high
	# index of psvar (12) here to avoid collisions with user defined entries.
	psvar[12]=
	# Check if a Conda environment is active and display its name.
	if [[ -n $CONDA_DEFAULT_ENV ]]; then
	psvar[12]="${CONDA_DEFAULT_ENV//[$'\t\r\n']}"
	fi
	# When VIRTUAL_ENV_DISABLE_PROMPT is empty, it was unset by the user and
	# Pure should take back control.
	if [[ -n $VIRTUAL_ENV ]] && [[ -z $VIRTUAL_ENV_DISABLE_PROMPT || $VIRTUAL_ENV_DISABLE_PROMPT = 12 ]]; then
	psvar[12]="${VIRTUAL_ENV:t}"
	export VIRTUAL_ENV_DISABLE_PROMPT=12
	fi
	# Nix package manager integration. If used from within 'nix shell' - shell name is shown like so:
	# ~/Projects/flake-utils-plus master
	# flake-utils-plus ❯
	if zstyle -T ":prompt:pure:environment:nix-shell" show; then
	if [[ -n $IN_NIX_SHELL ]]; then
	psvar[12]="${name:-nix-shell}"
	fi
	fi

[NightMachinery]

Thanks. There is no conflict on my part, I just wanted to change this venv, as I sometimes manually update my PATH and the venv becomes invalid.