muc

#!/usr/bin/env bash

# Most Used Commands (muc)
# keep a list of the most used commands

# Author Chris Reid <spikeysnack@gmail.com>
# DATE   4 Oct 2016
# LICENSE  "free for non-commercial use.
#           Modification allowed but original
#           attribution must be published.
#

OLDIFS=${IFS}

MUCDIR="$HOME/.muc"

LEN=10 # how many to show

REPLACE_TGZ=  # compress for space?

COMPRESSED="${MUCDIR}/mucfile.tgz"
MUCFILE="${MUCDIR}/mucfile"
TOPTEN="${MUCDIR}/topten.muc"
CURRDIR="${PWD}"


usage()
{
        cat <<EOF

usage: $0 [options]  [<N>]
        N  number of results (default 10)

OPTIONS:

   -c      clean muc dir of all files
   -h      show help
   -u      update muc file
   -v      verbose
   -z      replace tarfile
EOF
}

while getopts "chuvz" OPTION
do
    case $OPTION in

        c)
            CLEAR=1
            ;;

        h)
            usage
            exit 1
            ;;
        u)
            UPDATE=1
            ;;
        v)
            VERBOSE=1
            ;;

        z)
            REPLACE_TGZ=1
            ;;

        ?)
            usage
            exit
            ;;
    esac
done

#shift $(($OPTIND - 1))
N=${!OPTIND}

if [[ $N ]] ; then

    if  (( $N == $N )) ; then  # need a number
        LEN=${N}
    else
        [[ $VERBOSE ]] && echo "need a number (10)"
        usage
        exit -1
    fi
fi


[[ $CLEAR ]] && rm -f "${MUCFILE}" "${COMPRESSED}" "${TOPTEN}"


[ -d "${MUCDIR}"     ] &&   mkdir -p "${MUCDIR}"    # create muc dir if needed


[ -f "${COMPRESSED}" ] &&   tar --extract --gunzip --file "${COMPRESSED}" --directory "${MUCDIR}" --local  2>/dev/null  # decompress if found


now=$(date +"%Y-%m-%d") # today's date

if ! [ -f "${MUCFILE}" ] ; then
    touch "${MUCFILE}"
    echo "${now}" > "${MUCFILE}"
    cat $HOME/.bash_history >> "${MUCFILE}" # create file from history if needed
fi

last=$(stat -c %y  ${MUCFILE} | cut -d ' ' -f1)   # check date of mucfile

# echo -e "[$last|$now]\n"

if [[ $UPDATE ]] || ! [ "X${last}" == "X${now}" ] ; then # if not current

    [[ $VERBOSE ]] && echo "Updating muc file"

    replace="1c\\${now}"                # (sed) replace first line of file

    sed -i ${replace}  "${MUCFILE}"     # replace 1st line

    cat ~/.bash_history >> "${MUCFILE}" # append bash history

    REPLACE_TGZ="1"                     # we will update archive

    tar --create --directory "${MUCDIR}" --gzip --file "${COMPRESSED}" "${MUCFILE}"  2>/dev/null
fi


# lines are sorted, dups are removed, counted, and reverse sorted
# by number, largest first
curr=$(awk '{print $0}' ${MUCFILE} | sort | uniq -c | sort -rn)

let i=0
declare -a top_ten

while IFS= read -r  line
do

    line=$( echo "${line}" |  sed -e 's/^ *//' -e 's/ *$//' ) # trim leading/trailing spaces


    if [[ $VERBOSE ]] ; then
        echo -e "${line}"
    else
        line=$( echo  "${line}" | cut -d " " -f2- )
        echo -e "${line}"
    fi

    top_ten[$i]=${line}

    # count to 10 then bail
    [ $i -gt $(($LEN)) ] && break


    i=$(($i+1))

done < <(printf %s "${curr}" )  ## read from variable



## top ten

echo "TOP TEN" > "${TOPTEN}"

for (( i=0; i < ${#top_ten[@]}; i++))
do
    echo ${top_ten[$i]} >> "${TOPTEN}"
done



# save space if new file

if [[ $REPLACE_TGZ ]] ; then
    tar --create --directory "${MUCDIR}" --gzip --file "${COMPRESSED}" "${MUCFILE}" "${TOPTEN}" 2>/dev/null
fi

rm "$MUCFILE"

IFS=${OLDIFS}

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