zsh script to run ranger in "single window" mode, opening only the tabs saved by "save_tabs_on_exit", and suppressing the "$PWD" if it wasn't one of them

ranger_single

#!/bin/zsh

RangerTabsFilePath="$XDG_DATA_HOME/ranger/tabs"
RangerTabCount=0
WouldOpenPWD=0

if [ -f $RangerTabsFilePath ]; then
    # Split on newline from: https://unix.stackexchange.com/questions/29724/how-to-properly-collect-an-array-of-lines-in-zsh#29748
    RangerTabs=("${(@f)$(tr -s '\n\0' '\0\n' < $RangerTabsFilePath)}")
    RangerTabCount=${#RangerTabs[@]}

    # https://zsh.sourceforge.io/Doc/Release/Arithmetic-Evaluation.html#Arithmetic-Evaluation
    # https://unix.stackexchange.com/questions/411304/how-do-i-check-whether-a-zsh-array-contains-a-given-value#411331
    # Reverse subscripting: https://zsh.sourceforge.io/Doc/Release/Parameters.html#Array-Parameters
    if [[ ! -n "$RangerTabs[(r)$PWD]" ]]; then
        WouldOpenPWD=1
    fi
fi

if (( WouldOpenPWD == 1 )); then
    # Tab shifting / closing workaround from @darkelectron@github.com
    # https://github.com/ranger/ranger/issues/1590#issuecomment-705339499
    /sbin/ranger --cmd="tab_shift $RangerTabCount" --cmd="tab_close"
else
    /sbin/ranger
fi