prezto/modules/prompt/functions/prompt-pwd

#
# Prompt setup function commonly used by prompt themes.
#
# Authors:
#   Sorin Ionescu <sorin.ionescu@gmail.com>
#

# function prompt-pwd {

setopt localoptions extendedglob

local current_pwd="${PWD/#$HOME/~}"
local ret_directory

if [[ "$current_pwd" == (#m)[/~] ]]; then
  ret_directory="$MATCH"
  unset MATCH
elif zstyle -m ':prezto:module:prompt' pwd-length 'full'; then
  ret_directory=${PWD}
elif zstyle -m ':prezto:module:prompt' pwd-length 'long'; then
  ret_directory=${current_pwd}
else
  ret_directory="${${${${(@j:/:M)${(@s:/:)current_pwd}##.#?}:h}%/}//\%/%%}/${${current_pwd:t}//\%/%%}"
fi

unset current_pwd

print "$ret_directory"

# }