fbfdc6877d
- internal/backup: weekly (configurable) snapshots via the existing VACUUM INTO + blob-strip path; restart-safe (only backs up if newest is older than the interval), retains BACKUP_KEEP most recent, prunes the rest. Runs in a background goroutine; failures are logged, never fatal. - Config: BACKUP_DIR (./data/backups), BACKUP_INTERVAL (168h; 0 disables), BACKUP_KEEP (8). - Fix: blob-strip now clears attachments.image_data too, not just receipts. - Fix: STORAGE_DIR is the storage ROOT (default ./data) — receipts/ and attachments/ live under it; corrects the doubled-nesting from item 10. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
44 lines
1.4 KiB
Go
44 lines
1.4 KiB
Go
package storage
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import (
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"database/sql"
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"fmt"
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"strings"
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)
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// SnapshotTo writes a consistent point-in-time copy of the database to destPath
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// using SQLite's VACUUM INTO (never touching/locking the live file). When
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// includeBlobs is false, the image_data blobs are stripped from the copy,
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// leaving only metadata — which is ~99% smaller.
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//
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// destPath must not already exist (VACUUM INTO requires this).
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func (s *Store) SnapshotTo(destPath string, includeBlobs bool) error {
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if _, err := s.db.Exec(`VACUUM INTO '` + escapeSQLiteString(destPath) + `'`); err != nil {
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return fmt.Errorf("vacuum into snapshot: %w", err)
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}
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if includeBlobs {
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return nil
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}
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// Strip blobs from the copy only. image_data is NOT NULL, so use an empty blob.
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// Both receipts and their attachments carry blobs.
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snap, err := sql.Open("sqlite", destPath)
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if err != nil {
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return fmt.Errorf("open snapshot: %w", err)
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}
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defer snap.Close()
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for _, table := range []string{"receipts", "attachments"} {
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if _, err := snap.Exec(`UPDATE ` + table + ` SET image_data = X''`); err != nil {
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return fmt.Errorf("strip %s blobs: %w", table, err)
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}
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}
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if _, err := snap.Exec(`VACUUM`); err != nil {
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return fmt.Errorf("vacuum stripped snapshot: %w", err)
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}
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return nil
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}
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// escapeSQLiteString escapes a string for use inside single quotes in SQL.
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func escapeSQLiteString(s string) string {
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return strings.ReplaceAll(s, "'", "''")
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}
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