searchable bash command history with results selection

.bash_functions

function chop-first-column { awk '{for (i=2; i<NF; i++) printf $i " "; print $NF}' ; }
function strip-colors { sed "s/\x1B\[\([0-9]\{1,2\}\(;[0-9]\{1,2\}\)\?\)\?[mGK]//g" ; }

function h {
    local cyan='\e[0;36m'
    local cyan2='\e[1;36m'
    local NC='\e[0m' # No Color

    if [ $# -gt 0 ]; then
        REGEXP="$1"

        shift  #ignore already-captured first arg

        for var in "$@"
        do
            REGEXP="$REGEXP|$var"
        done

        IFS=$'\r\n'

        ARR=($(history | sort -k2 | uniq -f2 | sort -n | chop-first-column | grep -v "^h\b" | egrep -i --color="always" "$REGEXP"))
        ARR_SIZE=${#ARR[@]}
        SIZE_LEN=${#ARR_SIZE} # eg, 514 -> 3

        if [ $ARR_SIZE -gt 0 ]; then
            echo;

            local CNT=0
            for var in "${ARR[@]}"
            do
                CNT=$(($CNT + 1))
                printf " ${cyan}%${SIZE_LEN}s${NC}  %s\n" "$CNT" "${var}"
            done

            printf " ${cyan}\n"

            # read -n $SIZE_LEN -p " select a command: " num
            read -p " select a command: " num

            printf "${NC}\n"

            CMD=$(printf "${ARR[$num - 1]}" | strip-colors)

            if [ $num -ne 0 -o $num -eq 0 2>/dev/null ]; then
                if [[ ($num -gt 0) && ($num -le $ARR_SIZE) ]]; then
                    printf " ${cyan2}$CMD${NC}\n\n"
                    eval "$CMD"
                fi
            fi
        fi
    else
        history
    fi
}
export -f h

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