# arg 1:  the new package version
post_install() {
    echo "==> The progit2 book has been installed to /usr/share/doc/progit2/"
}

# arg 1:  the new package version
# arg 2:  the old package version
post_upgrade() {
    echo "==> The progit2 book has been updated and is located in /usr/share/doc/progit2/"
}

# arg 1:  the old package version
post_remove() {
    if [ -d "/usr/share/doc/progit2" ]; then
        echo "==> The directory "/usr/share/doc/progit2" has not been removed because it wasn't (maybe) empty. Check that out."
    fi
}