twitch() {
    livestreamer "twitch.tv/$1" &
}

sysupgrade(){
    old_kernel=$(pacman -Q linux-raspberrypi 2>/dev/null | awk '{print $2 }')
    LANG=de_DE.UTF-8 sudo pacmatic -Syu
    new_kernel=$(pacman -Q linux-raspberrypi 2>/dev/null | awk '{print $2 }')
    if [[ $old_kernel != $new_kernel  && $(uname -m) == 'armv7l' ]]
    then
        sudo mkinitcpio -k "$new_kernel-ARCH" -g /boot/initrd
    fi
    cower -u
}

copy_img_to_usb(){
    if [[ $1 = "" ]]
    then
        return 1
    fi
    FILE=$1
    FILESIZE=$(stat -c%s  "$1")
    TARGET=$2
    lsblk
    echo "Are you sure you want to copy $FILE to $TARGET?"
    read
    if [[ $REPLY =~ ^[Yy]$ ]]
    then
        sudo umount $TARGET?*
        dd bs=4M if=$FILE | pv -s $FILESIZE | sudo dd of=$TARGET && sync
    fi
}

cdtemp(){
    local tmpfolder=$(mktemp -d)
    cd $tmpfolder
    aliasstring="change_dir $tmpfolder "
    #delete folder if cd out of it
    alias cd=$aliasstring
}

#belongs to the cdtemp function
change_dir(){
    #If no dir is specified go to home directory as expected
    if [[ $2 = "" ]]
    then
        cd
    else
        cd "$2"
    fi
    if [ ! $(expr match $(pwd) '\(/tmp/tmp.[a-zA-Z0-9]*\)') ]
    then
        echo "Deleting tmp folder $1."
        rm -rf "$1"
        unalias cd
    fi
}

#from arch wiki
pacman_disowned(){
    tmp=${TMPDIR-/tmp}/pacman-disowned-$UID-$$
    db=$tmp/db
    fs=$tmp/fs

    mkdir "$tmp"
    trap 'rm -rf "$tmp"' EXIT

    pacman -Qlq | sort -u > "$db"
    #I added:
    #/etc/ssl/certs
    #/usr/lib/python
    #/usr/share/mime
    find /bin /etc /sbin /usr \
      ! -name lost+found\
      ! -path "/etc/ssl/certs/*"\
      ! -path "/usr/lib/python*"\
      ! -path "/usr/share/mime/*"\
      \( -type d -printf '%p/\n' -o -print \) | sort > "$fs"

    comm -23 "$fs" "$db"
}

virtual_env_prompt() {
    REPLY=${VIRTUAL_ENV+(${VIRTUAL_ENV:t}) }
}

delete-old-archives() {
    sudo tarsnap --fsck
    archives=$(sudo tarsnap --list-archives | sort)
    del_archives=$(echo $archives | head -n $(($(echo $archives | wc -l) - 3)))
    del_archives=("${(@f)del_archives}")
    for archive in $del_archives
    do
        read -q "reply?Do you want to delete '$archive' ? "
        echo ""
        if [[ $reply == "y" ]]
        then
            echo "Deleting '$archive' ..."
            sudo tarsnap -d -f "$archive"
        fi
    done
}

update-mirrors() {
    if [[ $(uname -m) != "x86_64" ]]
    then
        echo "Not supported on this architecture."
    else
        sudo sh -c "reflector -p http -l 50 --sort rate | tee /etc/pacman.d/mirrorlist_"
        sudo sed -i 's/mirrorlist$/mirrorlist_/g' /etc/pacman.conf
    fi
}

old-abi() {
    for i in $(pacman -Qqm); do
      if pacman -Qql $i | xargs readelf -d 2>/dev/null | grep -q libstdc++.so.6; then
        echo $i;
      fi;
    done
}