mirror of
https://github.com/offen/docker-volume-backup.git
synced 2024-09-19 21:20:28 +02:00
67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
// Copyright 2024 - Offen Authors <hioffen@posteo.de>
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// SPDX-License-Identifier: MPL-2.0
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package main
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import (
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"fmt"
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"slices"
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"strings"
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"time"
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"github.com/offen/docker-volume-backup/internal/errwrap"
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"golang.org/x/sync/errgroup"
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)
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// pruneBackups rotates away backups from local and remote storages using
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// the given configuration. In case the given configuration would delete all
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// backups, it does nothing instead and logs a warning.
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func (s *script) pruneBackups() error {
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if s.c.BackupRetentionDays < 0 {
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return nil
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}
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deadline := time.Now().AddDate(0, 0, -int(s.c.BackupRetentionDays)).Add(s.c.BackupPruningLeeway)
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eg := errgroup.Group{}
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for _, backend := range s.storages {
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b := backend
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eg.Go(func() error {
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if skipPrune(b.Name(), s.c.BackupSkipBackendsFromPrune) {
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s.logger.Info(
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fmt.Sprintf("Skipping pruning for backend `%s`.", b.Name()),
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)
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return nil
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}
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stats, err := b.Prune(deadline, s.c.BackupPruningPrefix)
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if err != nil {
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return err
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}
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s.stats.Lock()
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s.stats.Storages[b.Name()] = StorageStats{
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Total: stats.Total,
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Pruned: stats.Pruned,
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}
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s.stats.Unlock()
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return nil
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})
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}
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if err := eg.Wait(); err != nil {
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return errwrap.Wrap(err, "error pruning backups")
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}
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return nil
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}
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// skipPrune returns true if the given backend name is contained in the
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// list of skipped backends.
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func skipPrune(name string, skippedBackends []string) bool {
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return slices.ContainsFunc(
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skippedBackends,
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func(b string) bool {
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return strings.EqualFold(b, name) // ignore case on both sides
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},
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)
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}
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