Bash functions implementing working directory history

bash-functions-implementing-working-directory-history

#!/bin/bash

export WDHIST=( $(pwd) )

function cd {
    builtin cd $*
    if [ $? -eq 0 ]; then
        WDHIST[${#WDHIST[*]}]=$(pwd)
    fi
}

function cdhist {
    local len=${#WDHIST[*]}
    for (( i = 0; i < $len; i++ )); do
        printf " %4d  %s\n" $i ${WDHIST[$i]}
    done
}

function cd_ {
    if [ $# -ne 1 ]; then
        echo "Usage: cd_ <#> (# from cdhist)"
        return
    fi
    
    builtin cd ${WDHIST[$1]}
}