bashrc custom history

bash_history.sh

__lastcmd="$(history 1 | sed 's/^[ ]*[0-9]\+[ ]*//')"
HISTORY_FILE=~/.bash_eternal_history


function __prompt_cmd() {
    local lastexit="$?"
    local cmdstr="$(history 1 | sed 's/^[ ]*[0-9]\+[ ]*//')"
    local logstr="DATE='$(date -Iseconds)' PID=$$ USER=$USER PWD='$PWD' EXIT_CODE=$lastexit COMMAND=$cmdstr"

    if [[ "$cmdstr" != "$__lastcmd" ]] ; then
        __lastcmd="$cmdstr"
        echo "$logstr" >> $HISTORY_FILE
        if [[ -n "$lastexit" && "$lastexit" -ne 0 ]]; then
            local outtext="*** WARNING: The exit code was: $lastexit ***"
            local RCol='\e[0m'
            local Red='\e[0;31m'
            echo -e "$Red$outtext$RCol"
        fi
    fi
}
PROMPT_COMMAND=__prompt_cmd
function histgrep {
    (grep "$@" $HISTORY_FILE)
}