history

export HISTFILESIZE=15000
export HISTSIZE=15000

HISTCONTROL=ignoreboth:erasedups

shopt -s histappend 
#PROMPT_COMMAND="history -w;$PROMPT_COMMAND"
PROMPT_COMMAND=${PROMPT_COMMAND:-history -a}

_host=$(hostname | awk -F. '{ print $1 }')               
_date=$(date '+%m-%d-%y-%s')

HISTFILE="${HOME}/.history/bash-history-${_host}-${_date}"

_epoch_cmd="$HOME/bin/epoch2time-hist.pl"

_hist_usage()
{
    error="$*"

    test -n  && printf 'Error - %s\n\n' ${error}
    echo "Usage: hist [-t] [-n X] search-pattern";
    echo " -t will disable the more readable time format";
    echo " -n X - will print the bare command numbered X from the most recent hist output";
    echo " -nn X - will print the command numbered X from the most recent hist output";
}

hist() {
    grep_cmd='egrep'
    grep_flags=''
    grep_str=''
    format_time=''
    cmd_num=''
    debug="0"
    [ "$1" = "-d" ] && \
        { debug=1; shift; } 

    unset CLICOLOR_FORCE

    if [ ! -d ${HOME}/.history/ ]; then
        echo "Your history files are not setup correctly - ${HOME}/.history/ directory missing!";
        return 1;
    fi;

    kill_comment=""
    run_cmd=0
    #test -x "${_epoch_cmd}"  && format_time="$_epoch_cmd" || { echo "FATAL - missing time format tool, ($_epoch_cmd). Aborting." && return 1; }
    test -x "${_epoch_cmd}"  || { echo "FATAL - missing time format tool, ($_epoch_cmd). Aborting." && return 1; }
    if [ "$1" = "-t" ] ; then
        shift
        format_time=""
    elif [[ "$1" =~ ^-([Nnr]?)([0-9]*)$ ]] ; then
        last_arg=${BASH_REMATCH[1]}
        [[ -n "${BASH_REMATCH[2]}" ]] && cmd_num=${BASH_REMATCH[2]} || cmd_num=$2
        if [[ "$last_arg" = "r" || "$last_arg" = "" ]] ; then
            run_cmd=1
        elif [[ "$last_arg" =~ ^([Nn]).*$ ]] ; then
            [[ "${BASH_REMATCH[1]}" = "n" ]] && kill_comment=1 || kill_comment=0
        else
            _hist_usage "" && return 1
        fi
    fi
            echo "run_cmd=${run_cmd}"

    if [ ! -d ${HOME}/.hist/$$ ] ; then
        mkdir -p ${HOME}/.hist/$$
    fi
    if (( "$#" >= 2 )) ; then
        grep_flags=$1
        grep_str=$2
    elif (( "$#" == 1 )) ; then
        grep_str=$1
    else
        _hist_usage && return 1
    fi

#        /bin/ls -tr ${HOME}/.history/bash-history-* | xargs -L 65535 ${grep_cmd} ${grep_flags} ${grep_str} | sed 's/.*bash-history-//' 

    #test -z ${format_time} && format_time="sed 's%.*bash-history-%%'"
    test -z ${format_time} && format_time='s#.*bash-history-##'

    if [ -n "${cmd_num}" ] ; then
        last_hist="$(cat ${HOME}/.hist/$$/last.txt)"
        [ -f "${last_hist}" ] || { echo "fatal error: last history file ($last_hist) missing" ; return 2; }
        post_grep_re="^[^0-9]${cmd_num}:"
#        ls "${post_args[@]}"

        [[ ${kill_comment} = 1 || $run_cmd == 1 ]] && post_args=("${post_grep_re}") || post_args=(-B1 "${post_grep_re}")

        cmd="$(grep "${post_args[@]}" "${last_hist}" | sed "s/^ ${cmd_num}:/ /")"

        [[ $run_cmd == 1 ]] && { sh -c  "$cmd" ; return $?; } || echo "$cmd"
    else
        last_hist="${HOME}/.hist/$$/hist.txt"
        echo "${last_hist}" > ${HOME}/.hist/$$/last.txt
        echo format_time = "${format_time}"
        /bin/ls -tr ${HOME}/.history/bash-history-* | xargs -L 65535 ${grep_cmd} ${grep_flags} ${grep_str} | sed ${format_time} | ${_epoch_cmd} | tee "${last_hist}"
    fi
}

fixhist()
{
    sudo chown -R "${USER}" "${HOME}/.history/" && \
        sudo find "${HOME}/.history" -type f -print0 | sudo xargs -0 chmod 644 && \
            sudo chmod 700 "${HOME}/.history"
}

# vim:ft=sh:sts=4:ts=4