#!/bin/bash
################################################################################
## Home Config Backup Script
## 2012-06-29
################################################################################
## Note for Zsh: because of the KSH-style arrays (index starting at 0), you
## cannot use array index to append elements to arrays -- or the KSH_ARRAYS
## option for zsh must be used.

##==============================================================================
## Options
##==============================================================================

## Set Debug mode on
DEBUG=no
if [ "$DEBUG" = "yes" ]; then
	set -x
fi

## Variables
OLDPATH="$(pwd)"
cd "$HOME"
SCRIPTPATH="$(readlink -f $(dirname "$0"))"
COMPRESSION="gz"
ARCHIVENAME="$HOME/home-config-$(date "+%y-%m-%d-%H%M%S")"
ARCEXT="tar.gz"
ARCOPT="cvzf"

print_help()
{
    echo "Synopsis:"
    echo "  $1 [-o ARCHIVENAME] [-m COMPRESSION]"
    echo
    echo "Usage:"
    echo "  default: "
    echo "  -h:\t\tDisplay this help."
    echo "  -m: compression method among"
    echo "      * gz (default)"
    echo "      * xz"
    echo "  -o: output archive name (without extension)."
    echo ""
    echo "Note: xz is not available on older Unices."

}

while getopts ":hm:o:" opt; do
    case $opt in
        h)
            print_help "$0"
            exit 1
            ;;

        m)
            COMPRESSION="$OPTARG"
            ;;

        o)
	        ARCHIVENAME="${OLDPATH}/$OPTARG"
            ;;

        ?) 
            print_help "$0"
            exit 1
            ;;
        :)
            echo "Missing argument."
            echo "Use $0 -h for help."
            exit 1
            ;;
    esac
done

shift $(($OPTIND - 1))

case $COMPRESSION in
    "gz")
        ARCEXT="tar.gz"
        ARCOPT="cvzf"
        ;;

    "xz")
        ARCEXT="tar.xz"
        ARCOPT="cvJf"
        ;;

    *)
        ARCEXT="tar.gz"
        ARCOPT="cvzf"
        ;;
esac


if [ "${DEBUG}" = "yes" ]; then
    echo "COMPRESSION=[$COMPRESSION]"
    echo "ARCHIVENAME=[$ARCHIVENAME]"
    echo "ARCEXT=[$ARCEXT]"
    echo "ARCOPT=[$ARCOPT]"
fi

if [ -e "${ARCHIVENAME}.${ARCEXT}" ]; then
	echo "Error: ${ARCHIVENAME}.${ARCEXT} already exists!">&2
    exit 0
fi

##==============================================================================
## Arch Linux packages list
##==============================================================================

if [ -e "/usr/bin/pacman" ]; then
	ARCH_PKG_OFFICIAL="$HOME/.arch-pkg-official"
	ARCH_PKG_EXPLICIT="$HOME/.arch-pkg-explicit"
	ARCH_PKG_AUR="$HOME/.arch-pkg-aur"
	ARCH_MIRRORS="$HOME/.arch-mirrors"

	PKG_LOCAL='pacman -Qq | sort'
	PKG_FOREIGN='pacman -Qmq | sort'
	PKG_EXPLICIT='pacman -Qeq | sort'

    diff <(eval "${PKG_LOCAL}") <(eval "${PKG_FOREIGN}") --new-line-format='' --unchanged-group-format='%>' >"${ARCH_PKG_OFFICIAL}-$(hostname)"

    eval "${PKG_EXPLICIT}" >"${ARCH_PKG_EXPLICIT}-$(hostname)"
    eval "${PKG_FOREIGN}" >"${ARCH_PKG_AUR}-$(hostname)"

	cat /etc/pacman.conf | grep "^\[">"${ARCH_MIRRORS}-$(hostname)"
fi

##==============================================================================
## Let's fill the file list:
##==============================================================================
FILELIST=()

# Arch Linux package list
if [ -e "/usr/bin/pacman" ]; then
    for i in $(find . -maxdepth 1 -name '.arch*'  -exec basename {} \;)
    do
        FILELIST=(${FILELIST[*]} "$i")
    done
fi

# Awesome
for i in $(find .config/awesome \( -name "*.lua" -o -name "*.sh" \) -type f)
do
    FILELIST=(${FILELIST[*]} "$i")
done

# cmus
# FILELIST=(${FILELIST[*]} "$(ls .cmus/{autosave,*.theme}) ")
FILELIST=(${FILELIST[*]} "$(ls .cmus/autosave)")

# Conky
FILELIST=(${FILELIST[*]} ".conkyrc")

# Emacs
FILELIST=(${FILELIST[*]} ".emacs")
FILELIST=(${FILELIST[*]} ".emacs.d/plugins")
FILELIST=(${FILELIST[*]} ".emacs.d/abbrev_defs")

# GTK
FILELIST=(${FILELIST[*]} ".gtkrc-2.0")
FILELIST=(${FILELIST[*]} ".config/gtk-3.0/settings.ini")

# Luakit
FILELIST=(${FILELIST[*]} ".config/luakit/")

# LXTerminal
FILELIST=(${FILELIST[*]} ".config/lxterminal/lxterminal.conf")

# MPlayer
# FILELIST=(${FILELIST[*]} ".mplayer")

# Mutt
FILELIST=(${FILELIST[*]} ".muttrc")
FILELIST=(${FILELIST[*]} ".ml.sh")

# Nano
FILELIST=(${FILELIST[*]} ".nanorc")

# Netinit
FILELIST=(${FILELIST[*]} ".netinit")

# Ranger
for i in $(ls -d --indicator-style=none .config/ranger/* | grep -vi 'pycache\|bookmarks\|history\|tagged')
do
    FILELIST=(${FILELIST[*]} "$i")
done

# rtorrent
FILELIST=(${FILELIST[*]} ".rtorrent.rc")

# Shells
FILELIST=(${FILELIST[*]} ".bashrc")
FILELIST=(${FILELIST[*]} ".zshrc")
for i in $(ls .shell.d/*|grep -vi 'bhistory')
do
    FILELIST=(${FILELIST[*]} "$i")
done

# Taskwarrior
FILELIST=(${FILELIST[*]} ".taskrc")

# TeXlive
# for i in $(find texmf -type f|grep -vi 'moderncv/examples\|moderncv/manual\|.bzr')
# do
#     FILELIST=(${FILELIST[*]} "$i")
# done

# Vim
FILELIST=(${FILELIST[*]} ".vimrc")

# WMFS
FILELIST=(${FILELIST[*]} ".config/wmfs")

# Xinit
FILELIST=(${FILELIST[*]} ".xinitrc")

# Xresource
FILELIST=(${FILELIST[*]} ".Xresources")

# Xscreensaver
# FILELIST=(${FILELIST[*]} ".xscreensaver")


##==============================================================================
## Archiving
##==============================================================================

if [ "$DEBUG" = "yes" ]; then
	tar ${ARCOPT} "$ARCHIVENAME"  -C "$HOME" ${FILELIST[*]} -C "$SCRIPTPATH" "$(basename "$0")" --exclude-vcs
else
	tar ${ARCOPT} "${ARCHIVENAME}.${ARCEXT}"  -C "$HOME" ${FILELIST[*]} -C "$SCRIPTPATH" "$(basename "$0")" --exclude-vcs >/dev/null
fi

##==============================================================================
## Cleaning
##==============================================================================
cd "${OLDPATH}"

## Set Debug mode off
if [ "$DEBUG" = "yes" ]; then
	set +x
fi