#! /bin/bash

set -eu

repo_root=$(git rev-parse --show-toplevel)

# Test for newer changes in the dotfiles. Protection against clobbering changes you might want to preserve.
dry_run=$(rsync -avu --itemize-changes --dry-run --files-from=./tracked-files --exclude-from=./.gitignore . ~)
if echo "${dry_run}" | grep -q '^<'; then
    echo "Some installed files have newer mtimes than the repository versions. Please import the changes first."
    exit 1
elif echo "${dry_run}" | grep -q '^>'; then
    echo "Some installed files differ from the repository versions. Creating a backup..."
    backup_dir=$(mktemp -d -t backupXXXXXXXX)
    ${repo_root}/import ${backup_dir} y > /dev/null
    mkdir -p ${repo_root}/.backup/
    tar -czf ${repo_root}/.backup/$(basename $backup_dir).tgz $backup_dir
fi

# Actually perform the copy
rsync -avu --itemize-changes --files-from=./tracked-files --exclude-from=./.gitignore . ~