.bin/daily.sh: reorganize, use rsync instead of borgbackup

We can get away with using rsync, because we're using encrypted zfs on
the other side. No need to do encryption on the source side, nor is there
need to manage backup retention using borg. zfs snapshots are good enough.

.bin/daily.sh

@@ -1,52 +1,30 @@
 #!/bin/sh
 
-export BORG_REPO=ssh://nas/storage/backups/kunsi-t470
-export BORG_PASSCOMMAND='pass show nas/backup-pass'
+set -euo pipefail
+set -x
 
-info() { printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
-trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM
-
-yay -Syu
+# Push some git repos
 pass git push
 git --git-dir=$HOME/.cfg/ --work-tree=$HOME push
 
-info "Starting backup"
+# Do a backup.
+rsync -zaAP --numeric-ids --delete --relative \
+    --rsync-path="/usr/bin/rsync --fake-super" \
+    -e "ssh" --delete-excluded \
+    --exclude "/home/kunsi/.cache/" \
+    --exclude "/home/kunsi/.config/Rambox/" \
+    --exclude "/home/kunsi/.npm/" \
+    --exclude "/home/kunsi/.nvm/" \
+    --exclude "/home/kunsi/.platformio/" \
+    --exclude "/home/kunsi/Downloads/" \
+    --exclude "/home/kunsi/Schreibtisch/" \
+    --exclude "/home/kunsi/VirtualBox VMs/" \
+    "/home/kunsi" "kunsi-t470@nas":backups/
 
-borg create                         \
-    --stats                         \
-    --show-rc                       \
-    --compression lz4               \
-    --exclude-caches                \
-    --exclude '/home/*/.cache/*'    \
-    --exclude '/home/*/.dbus'      \
-                                    \
-    ::$(date +%Y-%m-%d)            \
-    /home/kunsi                     \
-
-backup_exit=$?
-
-info "Pruning repository"
-
-borg prune                          \
-    --list                          \
-    --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 1 ];
-then
-    info "Backup and/or Prune finished with a warning"
-fi
-
-if [ ${global_exit} -gt 1 ];
-then
-    info "Backup and/or Prune finished with an error"
-fi
-
-exit ${global_exit}
+rsync -zaAP --numeric-ids --delete --relative \
+    --rsync-path="/usr/bin/rsync --fake-super" \
+    -e "ssh" \
+    "/etc" "kunsi-t470@nas":backups/
 
+# Do updates
+yay -Syu