bl-user-setup

#!/bin/bash
#
#    bl-user-setup: a script to populate a new user's HOME directory
#    using template files from /usr/share/bunsen/skel/
#    Copyright: 2015-2017 John Crawley <john@bunsenlabs.org>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

USAGE="bl-user-setup: a script to populate a new user's HOME directory
using template files from /usr/share/bunsen/skel

Normally this script is run automatically on a user's first login,
and inhibited after that by a flag file:
~/.config/bunsen/bl-setup

It can, however be run again by a user to update their config files
from a new version of bunsen-configs. In this case backups will be made
of any files which are overwritten.

If the user has already made extensive changes to their config files
it would be better to copy in new settings from skel by hand.

Options:
-h --help
    Show this message.
--refresh
    Copy in any files in /usr/share/bunsen/skel which are different
    from those in ~/. Overwritten files will be backed up.
"

readonly USER=${USER}
readonly HOME=${HOME}
readonly GROUP=$(id -ng "$USER")

# Do not apply BL configs to the root account.
if [[ "$USER" = root ]]; then
    echo "$0: ERROR: USER is root, abort" >&2
    exit 1
fi

# Check for the user home directory
if [[ -z "$HOME" || ! -d "$HOME" ]]; then
    echo "$0: ERROR: user home directory <$HOME> is not set or does not exist." >&2
    exit 1
fi

bkp_sfx="~$( date +%FT%T )~"

if [[ -n $1 ]]
then
    case $1 in
    -h|--help)
        echo "$USAGE"
        exit 0
    ;;
    --refresh)
        echo "New versions of files in /usr/share/bunsen/skel will be copied into
$HOME, overwriting files there.
(foo.template files will be copied to foo, if different.)
Any overwritten files will be backed up with a suffix of $bkp_sfx

NB if you have already made many changes to your desktop,
it would be easier to check /usr/share/bunsen/skel
and copy in any new settings to $HOME by hand.

Do you want to continue? (Y)
"
        read -r
        case ${REPLY^} in
        Y|YES)
            rs_opt='--verbose'
            :
        ;;
        *)
            echo 'bye...'
            exit 0
        ;;
        esac
    ;;
    *)
        echo "$0: $1: bad option" >&2
        exit 1
    ;;
    esac
else
    # If setup already run, do nothing.
    [[ -f "$HOME/.config/bunsen/bl-setup" ]] && exit 0
fi

echo 'Running bl-user-setup to import configuration files.' >> "$HOME/.xsession-errors"

rsync -rlb ${rs_opt-} --checksum --suffix="$bkp_sfx" --safe-links /usr/share/bunsen/skel/ "$HOME"

for i in "$HOME/.gtk-bookmarks" "$HOME/.config/nitrogen/nitrogen.cfg"
do
    [[ -f "${i}.template" ]] || continue
    sed --in-place "s|%USERHOME%|$HOME|g" "${i}.template"
    if [[ -f "$i" ]]
    then
        if diff -BEbZ "$i" "${i}.template" >/dev/null
        then
            rm "${i}.template"
        else
            mv "$i" "${i}${bkp_sfx}"
            mv "${i}.template" "$i"
        fi
    else
        mv "${i}.template" "$i"
    fi
done

ln -sTf /usr/share/images/bunsen/wallpapers "$HOME/Pictures/wallpapers/bunsen"

mkdir -p "$HOME/.config/bunsen" # this should already exist
touch "$HOME/.config/bunsen/bl-setup"

chown -R "$USER":"$GROUP" "$HOME"

exit 0