p-beautifier

#!/bin/bash

#
# p-beautifier — /etc/portage/package.* files beautifier
#
# With this script you can make a hook while adding new item to package.* file.
# The lines will be alphanumeric sorted and the keys will be indented from the
# packages.
#
# You may prefer use this script through aliases in your ~/.bashrc like
#    alias p-use="/path/to/p-beautifier use "
# And use it from the shell like `p-use app-emulation/wine X alsa -pulseaudio`
# It will be equivalent to
#    `echo "app-emulation/wine X alsa -pulseaudio" >> /etc/portage/package.use`
# But more pretty — indented to 2 columns and sorted.
#
# @autor fargred
# @last_edit 20101025
# @licence GPL v.2
#

FILE=$1
PACKAGE=$2
KEYS=${@}
KEYS=${KEYS#${1}\ ${2}}
# right column start from INDENT symbols
INDENT=32
ASK_ME='yes'
MERGE='yes'

add_line() {
    if [[ ${#PACKAGE[0]} -lt $INDENT ]]; then {
        num_of_spaces=$(($INDENT-${#PACKAGE[0]}))
        for ((i=0; i < $num_of_spaces; i++)); do
            PACKAGE="${PACKAGE} "
        done
    }; fi
    echo "${PACKAGE}${KEYS}" >> /tmp/package.$FILE.tmp
}

check_line() {
# PACKAGE variable can contain perfixes and postfixes like ">=" or
# version numbers, so purifying to section/package
    PKG_SECTION=${PACKAGE%/*}
        PKG_SECTION=${PKG_SECTION//[><=]/}
    PKG_NAME=${PACKAGE#*/}
        PKG_NAME=${PKG_NAME//-[0-9]*/}
    echo ${PKG_SECTION}
    echo ${PKG_NAME}
    search=`grep ${PKG_SECTION}/${PKG_NAME} /etc/portage/package.$FILE`
    if [[ ${search} != '' ]]; then {
        echo -en "Requested package is already in file /etc/portage/package.$FILE\nThe string is: \"${search}\"\nNow, type the exactly package, you prefer. Ctrl+C any time exit. Hit <Enter> to left\ndefault: \"${PACKAGE}\"\nPackage > "
        read input
        if [[ ${input} != '' ]]; then
            PACKAGE=${input}; fi

        echo -en "Now, type the exactly keys, you prefer for that package. Ctrl+C any time exit. Hit <Enter> to left\ndefault: \"${KEYS}\"\nKeys > "
        read input
        if [[ ${input} != '' ]]; then
            KEYS=${input}; fi

    grep -v ${PKG_SECTION}/${PKG_NAME} /etc/portage/package.$FILE > /tmp/package.$FILE.tmp
    }
    else {
        cp /etc/portage/package.${FILE} /tmp/package.$FILE.tmp
    }; fi
}

check_line
add_line

if [[ $ASK_ME == 'yes' ]]; then {
    echo -e "\nThis is a new /etc/portage/package.$FILE:\n"
    cat /tmp/package.$FILE.tmp
    echo -en "\nDo you want to merge this file with the already exist? [Y/n] "
    read input
    if [[ ${input} == 'n' || ${input} == 'N' ]]; then
        MERGE='no'; fi
}; fi

if [[ $MERGE == 'yes' ]]; then
    cat /tmp/package.$FILE.tmp | sort -bdf > /etc/portage/package.$FILE; fi