#!/bin/bash
################################################################################
## Home Config Backup Script
## 2012-09-01
################################################################################
## Note for Zsh: because of the Ksh-style arrays (index starting at 0), you
## cannot use array index to append elements to arrays -- otherwise 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

##==============================================================================
## Packages list
##==============================================================================

## Arch Linux
if [ -e "/usr/bin/pacman" ]; then
    HOST=$(hostname)

    ARCH_PKG_OFFICIAL="$HOME/.pkg-arch-official"
	ARCH_PKG_EXPLICIT="$HOME/.pkg-arch-explicit"
	ARCH_PKG_AUR="$HOME/.pkg-arch-aur"

	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='%>' >"${ARCH_PKG_OFFICIAL}-${HOST}"

    eval "${PKG_EXPLICIT}" >"${ARCH_PKG_EXPLICIT}-${HOST}"
    eval "${PKG_FOREIGN}" >"${ARCH_PKG_AUR}-${HOST}"
fi

## TeXlive
if type tlmgr >/dev/null 2>&1; then
    HOST=$(hostname)

    TEXLIVE_BASIC="$(tlmgr info collection-basic --list | sed -n '/^\s\+/{s/\s\+//g;p}' | sort)"
    TEXLIVE_ALL="$(tlmgr info --only-installed | grep -v 'x86_64' | cut -d' ' -f2 | cut -f1 -d':' | sort)"

    comm -3 <(echo "$TEXLIVE_BASIC") <(echo "$TEXLIVE_ALL") | sed 's/\s\+//g' >"$HOME/.pkg-texlive-${HOST}"
fi

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

## Distro + TeXlive Package list
for i in $(find . -maxdepth 1 -name '.pkg*'  -exec basename {} \;)
do
    FILELIST=(${FILELIST[*]} "$i")
done

## Awesome
FILELIST=(${FILELIST[*]} ".config/awesome/rc.lua")
FILELIST=(${FILELIST[*]} ".config/awesome/themes/custom/theme.lua")

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

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

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

## Git
FILELIST=(${FILELIST[*]} ".gitconfig")

## Homeinit
FILELIST=(${FILELIST[*]} ".homeinit")

## Luakit
FILELIST=(${FILELIST[*]} ".config/luakit/rc.lua")
FILELIST=(${FILELIST[*]} ".config/luakit/binds.lua")
FILELIST=(${FILELIST[*]} ".config/luakit/globals.lua")
FILELIST=(${FILELIST[*]} ".luakit_bookmarks_converter.lua")

## Mutt
FILELIST=(${FILELIST[*]} ".muttrc")
for i in $(ls -ad --indicator-style=none .mutt.d/* | grep -vi 'cache')
do
    FILELIST=(${FILELIST[*]} "$i")
done

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

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

## README
FILELIST=(${FILELIST[*]} "README")

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

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

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

## Terminfo
# FILELIST=(${FILELIST[*]} ".terminfo/x/xterm")

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

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

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

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

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

if [ "$DEBUG" = "yes" ]; then
	tar ${ARCOPT} "${ARCHIVENAME}.${ARCEXT}" -C "$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