add initial backup script

local/bin/backup

@@ -0,0 +1,75 @@
+#!/bin/sh
+
+export BORG_REPO=ssh://Caret/home/ninewise/borg
+export BORG_PASSPHRASE="$(pass show borg)"
+
+info() { printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
+trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM
+
+info "Starting backup"
+
+borg create                           \
+	--verbose                         \
+	--filter AME                      \
+	--list                            \
+	--stats                           \
+	--show-rc                         \
+	--compression lz4                 \
+	--exclude-caches                  \
+	--exclude '/etc/sv/*/supervise'   \
+	--exclude '/var/tmp/*'            \
+	--exclude '/var/db/*'             \
+	--exclude '/var/cache'            \
+	--exclude '/var/lib/alsa'         \
+	--exclude '/var/lib/tor'          \
+	--exclude '/data/homes/*'         \
+	--exclude '/data/music/*'         \
+	--exclude '/data/pictures/*'      \
+	--exclude '/data/programming/*'   \
+	--exclude '/data/torrents/*'      \
+	--exclude '/home/*/.ssh/control*' \
+	--exclude '*/.git/*'              \
+	--exclude '*/.stack-work/*'       \
+	--exclude '*/lock'                \
+	\
+	::'{hostname}-{now}'              \
+	/etc                              \
+	/var                              \
+	/home/ninewise/dotfiles           \
+	/home/ninewise/.gnupg             \
+	/home/ninewise/.password-store    \
+	/home/ninewise/.ssh               \
+	/home/ninewise/.xmonad/src/       \
+	/home/ninewise/.yash_history      \
+	/data
+
+backup_exit=$?
+
+info "Pruning repository"
+
+# Use the `prune` subcommand to maintain 7 daily, 4 weekly and 6 monthly
+# archives of THIS machine. The '{hostname}-' prefix is very important to
+# limit prune's operation to this machine's archives and not apply to
+# other machines' archives also:
+
+borg prune                          \
+	--list                          \
+	--prefix '{hostname}-'          \
+	--show-rc                       \
+	--keep-daily    7               \
+	--keep-weekly   4               \
+	--keep-monthly  6
+
+prune_exit=$?
+
+global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))
+
+if [ ${global_exit} -eq 0 ]; then
+	info "Backup and Prune finished successfully"
+elif [ ${global_exit} -eq 1 ]; then
+	info "Backup and/or Prune finished with warnings"
+else
+	info "Backup and/or Prune finished with errors"
+fi
+
+exit ${global_exit}