#!/usr/bin/fish

# Create an incremental system backup using bup
# Useful resources:
# https://gist.github.com/bradfa/a710a4e4b83b07b7a8be77cae86ff56b
# https://gist.github.com/jasontbradshaw/6a69d7c9ae0c73f54200

name=(date -u +'%Y-%m-%d')
repository=/mnt/drive/bup

# Set the `bup` directory here so it affects all the `bup` commands.
export BUP_DIR=$repository

# Create the backup repository if it doesn't exist.
if test -d $repository
    bup init
    chmod 700 $repository
end

# Do the backup as non-intrusively as possible.
echo "Indexing $name..."
nice -n19 ionice -c3 bup index -vv --exclude-rx-from=(status dirname)/exclude /etc /var /srv /home/ta180m

echo "Backing up $name to $repository..."
nice -n19 ionice -c3 bup save -vv --name=$name --compress=9