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#!/bin/sh -e
# Daily backup script. Perform once per day with a cron like:
# 55 18 * * * /Users/marc/bin/bk >/tmp/bk.out 2>&1
error() { echo "$@" >&2; return 1; }
dest="${BK:-/Volumes/sandisk4}/backup/$(hostname -s)"
day="$(date +%A)"
test -d "$dest" || error "$dest not available"
# Clear previous week incremental backup
mkdir "$HOME/emptydir"
rsync --delete -a "$HOME/emptydir/" "$dest/$day/"
rmdir "$HOME/emptydir"
# Now backup
rsync --delete --delete-excluded --exclude-from="$HOME/.bkignore" \
--backup --backup-dir="${dest#*:}/$(date +%A)" -av "$HOME" "$dest/current"
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