LibrePortal/scripts/backup/engine/restic_restore.sh
librelad fe770ae699 feat(backup): system-config snapshot + skip the reproducible WebUI; reserved-name docs
(a) Docs: reserve tools/ scripts/ resources/ as LibrePortal folder names (apps must
not bind-mount to them); document resources/ as the home for nest-able data AND for
.sh payloads that execute on load (vs scripts/ for sourced functions); document the
backup model (what's captured vs reproducible).

(b) System-config backup so a bare-metal restore is self-sufficient — this is why
the system root is its own tree. New scripts/backup/system/backup_system.sh:
- backupSystemConfig snapshots <system>/configs (global settings, WebUI creds, and
  the BACKUP-LOCATION creds — otherwise the keys to reach your own backups live only
  on the box) to every enabled location. Lightweight static-dir snapshot — it does
  NOT go through backupAppStart (no containers to quiesce / DBs to dump).
- restic adapter resticBackupSystemToLocation (tag system=config) + dispatcher
  engineBackupSystem; restore via resticRestoreSystemLatest / engineRestoreSystemLatest
  + backupRestoreSystemConfig (restores to a STAGING dir — never auto-overwrites
  live config).
- backupAllApps runs it after the app loop.

WebUI exclusion: backupAllApps skips the 'libreportal' app — its frontend + generated
JSON regenerate, and its only state (the login) is in the system config now captured
above. Nothing in its data dir warrants a snapshot.

Verified with stubs: app loop skips libreportal + invokes the system backup; the
system backup dispatches to both locations; backup/restore function names pair with
the dispatcher. NOTE: restic-only (the sole live engine adapter); end-to-end repo
round-trip still needs a live box before being relied on.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
2026-05-26 00:20:31 +01:00

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Bash

#!/bin/bash
resticRestoreSnapshot()
{
local idx="$1"
local snapshot_id="$2"
local target_dir="$3"
local include_path="$4"
if [[ -z "$snapshot_id" || -z "$target_dir" ]]; then
isError "resticRestoreSnapshot requires snapshot_id and target_dir"
return 1
fi
resticEnvExport "$idx" || return 1
runFileOp mkdir -p "$target_dir"
local args=(restore "$snapshot_id" --target "$target_dir")
[[ -n "$include_path" ]] && args+=(--include "$include_path")
isNotice "Restoring ${snapshot_id:0:8} from $(resticLocationName "$idx")$target_dir"
runBackupOp restic "${args[@]}"
local rc=$?
resticEnvUnset
return $rc
}
resticRestoreAppLatest()
{
local idx="$1"
local app_name="$2"
local target_dir="$3"
local host="${4:-$CFG_INSTALL_NAME}"
local snapshot_id
snapshot_id=$(resticSnapshotLatestId "$idx" "$app_name" "$host")
if [[ -z "$snapshot_id" ]]; then
isError "No snapshot found in $(resticLocationName "$idx") for app=$app_name host=$host"
return 1
fi
local include_path="$containers_dir$app_name"
resticRestoreSnapshot "$idx" "$snapshot_id" "$target_dir" "$include_path"
}
resticRestoreSystemLatest()
{
local idx="$1"
local target_dir="$2"
local host="${3:-$CFG_INSTALL_NAME}"
resticEnvExport "$idx" || return 1
local snapshot_id
snapshot_id=$(runBackupOp restic snapshots \
--tag "system=config" --host "$host" \
--latest 1 --json --no-lock 2>/dev/null | \
grep -o '"short_id":"[^"]*"' | head -1 | cut -d'"' -f4)
resticEnvUnset
if [[ -z "$snapshot_id" ]]; then
isError "No system-config snapshot found in $(resticLocationName "$idx") for host=$host"
return 1
fi
# Whole-snapshot restore (the snapshot is just the config tree) into staging.
resticRestoreSnapshot "$idx" "$snapshot_id" "$target_dir"
}