76 lines
2.7 KiB
Bash
Executable File
76 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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#
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# Purpose : Back up your home folder with borg to your Nextcloud files, in
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# /mnt/<domain>/.backup-<hostname>. Run daily by
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# coredesktop-backup.timer; `configure backup` sets it up.
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#
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# Keeps 7 daily, 4 weekly and 6 monthly backups. To leave out more, list
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# paths or borg patterns in ~/.config/coredesktop/backup-exclude, one per line.
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# Wrapped in { ...; exit; } so bash reads the whole script up front; update
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# replaces this file (git pull) while a backup may be running.
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{
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BACKUP_CONF="$HOME/.config/coredesktop/backup.conf"
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USER_EXCLUDE="$HOME/.config/coredesktop/backup-exclude"
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# Tell the desktop when a backup fails, as no one watches the timer
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fail() {
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echo "$1" >&2
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notify-send --app-name=CoreDesktop --icon=dialog-error "Backup failed" "$1" 2> /dev/null
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exit 1
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}
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[ -f "$BACKUP_CONF" ] || fail "Backups aren't set up. Run: configure backup"
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source "$BACKUP_CONF"
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# The files mount comes up at login, perhaps before the network; give it a
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# few minutes rather than writing into the empty folder underneath
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for try in {1..10}; do
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mountpoint -q "$BACKUP_MOUNT" && break
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mount "$BACKUP_MOUNT" 2> /dev/null && break
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sleep 30
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done
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mountpoint -q "$BACKUP_MOUNT" || fail "Your Nextcloud files aren't mounted at $BACKUP_MOUNT."
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export BORG_REPO
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export BORG_PASSCOMMAND="secret-tool lookup coredesktop backup repo $BORG_REPO"
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# Rebuilt by borg, or by reinstalling, so not worth the space
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excludes=(
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"$HOME/.cache"
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"$HOME/.davfs2/cache"
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"$HOME/.local/share/Trash"
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"$HOME/.local/share/containers"
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"$HOME/.local/share/flatpak"
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"$HOME/.local/share/siblings"
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"$HOME/.local/share/coredesktop"
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"$HOME/.var/app/*/cache"
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"$HOME/.npm"
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"$HOME/.cargo/registry"
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"$HOME/go/pkg/mod"
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)
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exclude_args=(--exclude-caches)
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for path in "${excludes[@]}"; do
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exclude_args+=(--exclude "sh:$path")
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done
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[ -f "$USER_EXCLUDE" ] && exclude_args+=(--exclude-from "$USER_EXCLUDE")
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echo "Backing up $HOME to $BORG_REPO..."
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# --one-file-system leaves out other mounts and btrfs subvolumes inside home
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borg create --one-file-system --compression zstd --stats \
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"${exclude_args[@]}" "::{hostname}-{now:%Y-%m-%dT%H:%M}" "$HOME"
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status=$?
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# 1 is a warning, e.g. a file changed while it was read; the backup still exists
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(( status <= 1 )) || fail "borg couldn't back up $HOME (exit $status). See: journalctl --user -u coredesktop-backup"
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echo "Removing old backups..."
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borg prune --glob-archives '{hostname}-*' \
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--keep-daily 7 --keep-weekly 4 --keep-monthly 6 \
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|| fail "borg couldn't remove old backups. See: journalctl --user -u coredesktop-backup"
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borg compact || fail "borg couldn't free space from old backups. See: journalctl --user -u coredesktop-backup"
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echo "Backup finished."
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exit 0
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}
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