Added abstract helper interface for all storage backends (#135)

* Added abstract helper interface and implemented it for all storage backends

* Moved storage client initializations also to helper classes

* Fixed ssh init issue

* Moved script parameter to helper struct to simplify script init.

* Created sub modules. Enhanced abstract implementation.

* Fixed config issue

* Fixed declaration issues. Added config to interface.

* Added StorageProviders to unify all backends.

* Cleanup, optimizations, comments.

* Applied discussed changes. See description.

Moved modules to internal packages.
Replaced StoragePool with slice.
Moved conditional for init of storage backends back to script.

* Fix docker build issue

* Fixed accidentally removed local copy condition.

* Delete .gitignore

* Renaming/changes according to review

Renamed Init functions and interface.
Replaced config object with specific config values.
Init func returns interface instead of struct.
Removed custom import names where possible.

* Fixed auto-complete error.

* Combined copy instructions into one layer.

* Added logging func for storages.

* Introduced logging func for errors too.

* Missed an error message

* Moved config back to main. Optimized prune stats handling.

* Move stats back to main package

* Code doc stuff

* Apply changes from #136

* Replace name field with function.

* Changed receiver names from stg to b.

* Renamed LogFuncDef to Log

* Removed redundant package name.

* Renamed storagePool to storages.

* Simplified creation of new storage backend.

* Added initialization for storage stats map.

* Invert .dockerignore patterns.

* Fix package typo

cmd/backup/script.go

@@ -5,19 +5,22 @@ package main
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"io"
 	"io/fs"
-	"io/ioutil"
-	"net/http"
 	"os"
 	"path"
 	"path/filepath"
-	"strings"
 	"text/template"
 	"time"
 
+	"github.com/offen/docker-volume-backup/internal/storage"
+	"github.com/offen/docker-volume-backup/internal/storage/local"
+	"github.com/offen/docker-volume-backup/internal/storage/s3"
+	"github.com/offen/docker-volume-backup/internal/storage/ssh"
+	"github.com/offen/docker-volume-backup/internal/storage/webdav"
+	"github.com/offen/docker-volume-backup/internal/utilities"
+
 	"github.com/containrrr/shoutrrr"
 	"github.com/containrrr/shoutrrr/pkg/router"
 	"github.com/docker/docker/api/types"
@@ -26,29 +29,21 @@ import (
 	"github.com/docker/docker/client"
 	"github.com/kelseyhightower/envconfig"
 	"github.com/leekchan/timeutil"
-	"github.com/minio/minio-go/v7"
-	"github.com/minio/minio-go/v7/pkg/credentials"
 	"github.com/otiai10/copy"
-	"github.com/pkg/sftp"
 	"github.com/sirupsen/logrus"
-	"github.com/studio-b12/gowebdav"
 	"golang.org/x/crypto/openpgp"
-	"golang.org/x/crypto/ssh"
 )
 
 // script holds all the stateful information required to orchestrate a
 // single backup run.
 type script struct {
-	cli          *client.Client
-	minioClient  *minio.Client
-	webdavClient *gowebdav.Client
-	sshClient    *ssh.Client
-	sftpClient   *sftp.Client
-	logger       *logrus.Logger
-	sender       *router.ServiceRouter
-	template     *template.Template
-	hooks        []hook
-	hookLevel    hookLevel
+	cli       *client.Client
+	storages  []storage.Backend
+	logger    *logrus.Logger
+	sender    *router.ServiceRouter
+	template  *template.Template
+	hooks     []hook
+	hookLevel hookLevel
 
 	file  string
 	stats *Stats
@@ -63,7 +58,7 @@ type script struct {
 // reading from env vars or other configuration sources is expected to happen
 // in this method.
 func newScript() (*script, error) {
-	stdOut, logBuffer := buffer(os.Stdout)
+	stdOut, logBuffer := utilities.Buffer(os.Stdout)
 	s := &script{
 		c: &Config{},
 		logger: &logrus.Logger{
@@ -75,7 +70,12 @@ func newScript() (*script, error) {
 		stats: &Stats{
 			StartTime: time.Now(),
 			LogOutput: logBuffer,
-			Storages:  StoragesStats{},
+			Storages: map[string]StorageStats{
+				"S3":     {},
+				"WebDav": {},
+				"SSH":    {},
+				"Local":  {},
+			},
 		},
 	}
 
@@ -107,114 +107,56 @@ func newScript() (*script, error) {
 		s.cli = cli
 	}
 
+	logFunc := func(logType storage.LogType, context string, msg string, params ...interface{}) error {
+		var allParams []interface{}
+		allParams = append(allParams, context)
+		allParams = append(allParams, params...)
+
+		switch logType {
+		case storage.INFO:
+			s.logger.Infof("[%s] "+msg, allParams...)
+			return nil
+		case storage.WARNING:
+			s.logger.Warnf("[%s] "+msg, allParams...)
+			return nil
+		case storage.ERROR:
+			return fmt.Errorf("[%s] "+msg, allParams...)
+		default:
+			s.logger.Warnf("[%s] "+msg, allParams...)
+			return nil
+		}
+	}
+
 	if s.c.AwsS3BucketName != "" {
-		var creds *credentials.Credentials
-		if s.c.AwsAccessKeyID != "" && s.c.AwsSecretAccessKey != "" {
-			creds = credentials.NewStaticV4(
-				s.c.AwsAccessKeyID,
-				s.c.AwsSecretAccessKey,
-				"",
-			)
-		} else if s.c.AwsIamRoleEndpoint != "" {
-			creds = credentials.NewIAM(s.c.AwsIamRoleEndpoint)
+		if s3Backend, err := s3.NewStorageBackend(s.c.AwsEndpoint, s.c.AwsAccessKeyID, s.c.AwsSecretAccessKey, s.c.AwsIamRoleEndpoint,
+			s.c.AwsEndpointProto, s.c.AwsEndpointInsecure, s.c.AwsS3Path, s.c.AwsS3BucketName, s.c.AwsStorageClass, logFunc); err != nil {
+			return nil, err
 		} else {
-			return nil, errors.New("newScript: AWS_S3_BUCKET_NAME is defined, but no credentials were provided")
+			s.storages = append(s.storages, s3Backend)
 		}
-
-		options := minio.Options{
-			Creds:  creds,
-			Secure: s.c.AwsEndpointProto == "https",
-		}
-
-		if s.c.AwsEndpointInsecure {
-			if !options.Secure {
-				return nil, errors.New("newScript: AWS_ENDPOINT_INSECURE = true is only meaningful for https")
-			}
-
-			transport, err := minio.DefaultTransport(true)
-			if err != nil {
-				return nil, fmt.Errorf("newScript: failed to create default minio transport")
-			}
-			transport.TLSClientConfig.InsecureSkipVerify = true
-			options.Transport = transport
-		}
-
-		mc, err := minio.New(s.c.AwsEndpoint, &options)
-		if err != nil {
-			return nil, fmt.Errorf("newScript: error setting up minio client: %w", err)
-		}
-		s.minioClient = mc
 	}
 
 	if s.c.WebdavUrl != "" {
-		if s.c.WebdavUsername == "" || s.c.WebdavPassword == "" {
-			return nil, errors.New("newScript: WEBDAV_URL is defined, but no credentials were provided")
+		if webdavBackend, err := webdav.NewStorageBackend(s.c.WebdavUrl, s.c.WebdavPath, s.c.WebdavUsername, s.c.WebdavPassword,
+			s.c.WebdavUrlInsecure, logFunc); err != nil {
+			return nil, err
 		} else {
-			webdavClient := gowebdav.NewClient(s.c.WebdavUrl, s.c.WebdavUsername, s.c.WebdavPassword)
-			s.webdavClient = webdavClient
-			if s.c.WebdavUrlInsecure {
-				defaultTransport, ok := http.DefaultTransport.(*http.Transport)
-				if !ok {
-					return nil, errors.New("newScript: unexpected error when asserting type for http.DefaultTransport")
-				}
-				webdavTransport := defaultTransport.Clone()
-				webdavTransport.TLSClientConfig.InsecureSkipVerify = s.c.WebdavUrlInsecure
-				s.webdavClient.SetTransport(webdavTransport)
-			}
+			s.storages = append(s.storages, webdavBackend)
 		}
 	}
 
 	if s.c.SSHHostName != "" {
-		var authMethods []ssh.AuthMethod
-
-		if s.c.SSHPassword != "" {
-			authMethods = append(authMethods, ssh.Password(s.c.SSHPassword))
-		}
-
-		if _, err := os.Stat(s.c.SSHIdentityFile); err == nil {
-			key, err := ioutil.ReadFile(s.c.SSHIdentityFile)
-			if err != nil {
-				return nil, errors.New("newScript: error reading the private key")
-			}
-
-			var signer ssh.Signer
-			if s.c.SSHIdentityPassphrase != "" {
-				signer, err = ssh.ParsePrivateKeyWithPassphrase(key, []byte(s.c.SSHIdentityPassphrase))
-				if err != nil {
-					return nil, errors.New("newScript: error parsing the encrypted private key")
-				}
-				authMethods = append(authMethods, ssh.PublicKeys(signer))
-			} else {
-				signer, err = ssh.ParsePrivateKey(key)
-				if err != nil {
-					return nil, errors.New("newScript: error parsing the private key")
-				}
-				authMethods = append(authMethods, ssh.PublicKeys(signer))
-			}
-		}
-
-		sshClientConfig := &ssh.ClientConfig{
-			User:            s.c.SSHUser,
-			Auth:            authMethods,
-			HostKeyCallback: ssh.InsecureIgnoreHostKey(),
-		}
-		sshClient, err := ssh.Dial("tcp", fmt.Sprintf("%s:%s", s.c.SSHHostName, s.c.SSHPort), sshClientConfig)
-		s.sshClient = sshClient
-		if err != nil {
-			return nil, fmt.Errorf("newScript: error creating ssh client: %w", err)
-		}
-		_, _, err = s.sshClient.SendRequest("keepalive", false, nil)
-		if err != nil {
+		if sshBackend, err := ssh.NewStorageBackend(s.c.SSHHostName, s.c.SSHPort, s.c.SSHUser, s.c.SSHPassword, s.c.SSHIdentityFile,
+			s.c.SSHIdentityPassphrase, s.c.SSHRemotePath, logFunc); err != nil {
 			return nil, err
-		}
-
-		sftpClient, err := sftp.NewClient(sshClient)
-		s.sftpClient = sftpClient
-		if err != nil {
-			return nil, fmt.Errorf("newScript: error creating sftp client: %w", err)
+		} else {
+			s.storages = append(s.storages, sshBackend)
 		}
 	}
 
+	localBackend := local.NewStorageBackend(s.c.BackupArchive, s.c.BackupLatestSymlink, logFunc)
+	s.storages = append(s.storages, localBackend)
+
 	if s.c.EmailNotificationRecipient != "" {
 		emailURL := fmt.Sprintf(
 			"smtp://%s:%s@%s:%d/?from=%s&to=%s",
@@ -286,14 +228,14 @@ func newScript() (*script, error) {
 // restart everything that has been stopped.
 func (s *script) stopContainers() (func() error, error) {
 	if s.cli == nil {
-		return noop, nil
+		return utilities.Noop, nil
 	}
 
 	allContainers, err := s.cli.ContainerList(context.Background(), types.ContainerListOptions{
 		Quiet: true,
 	})
 	if err != nil {
-		return noop, fmt.Errorf("stopContainersAndRun: error querying for containers: %w", err)
+		return utilities.Noop, fmt.Errorf("stopContainersAndRun: error querying for containers: %w", err)
 	}
 
 	containerLabel := fmt.Sprintf(
@@ -309,11 +251,11 @@ func (s *script) stopContainers() (func() error, error) {
 	})
 
 	if err != nil {
-		return noop, fmt.Errorf("stopContainersAndRun: error querying for containers to stop: %w", err)
+		return utilities.Noop, fmt.Errorf("stopContainersAndRun: error querying for containers to stop: %w", err)
 	}
 
 	if len(containersToStop) == 0 {
-		return noop, nil
+		return utilities.Noop, nil
 	}
 
 	s.logger.Infof(
@@ -338,7 +280,7 @@ func (s *script) stopContainers() (func() error, error) {
 		stopError = fmt.Errorf(
 			"stopContainersAndRun: %d error(s) stopping containers: %w",
 			len(stopErrors),
-			join(stopErrors...),
+			utilities.Join(stopErrors...),
 		)
 	}
 
@@ -389,7 +331,7 @@ func (s *script) stopContainers() (func() error, error) {
 			return fmt.Errorf(
 				"stopContainersAndRun: %d error(s) restarting containers and services: %w",
 				len(restartErrors),
-				join(restartErrors...),
+				utilities.Join(restartErrors...),
 			)
 		}
 		s.logger.Infof(
@@ -415,7 +357,7 @@ func (s *script) createArchive() error {
 		backupSources = filepath.Join("/tmp", s.c.BackupSources)
 		// copy before compressing guard against a situation where backup folder's content are still growing.
 		s.registerHook(hookLevelPlumbing, func(error) error {
-			if err := remove(backupSources); err != nil {
+			if err := utilities.Remove(backupSources); err != nil {
 				return fmt.Errorf("takeBackup: error removing snapshot: %w", err)
 			}
 			s.logger.Infof("Removed snapshot `%s`.", backupSources)
@@ -432,7 +374,7 @@ func (s *script) createArchive() error {
 
 	tarFile := s.file
 	s.registerHook(hookLevelPlumbing, func(error) error {
-		if err := remove(tarFile); err != nil {
+		if err := utilities.Remove(tarFile); err != nil {
 			return fmt.Errorf("takeBackup: error removing tar file: %w", err)
 		}
 		s.logger.Infof("Removed tar file `%s`.", tarFile)
@@ -477,7 +419,7 @@ func (s *script) encryptArchive() error {
 
 	gpgFile := fmt.Sprintf("%s.gpg", s.file)
 	s.registerHook(hookLevelPlumbing, func(error) error {
-		if err := remove(gpgFile); err != nil {
+		if err := utilities.Remove(gpgFile); err != nil {
 			return fmt.Errorf("encryptBackup: error removing gpg file: %w", err)
 		}
 		s.logger.Infof("Removed GPG file `%s`.", gpgFile)
@@ -485,20 +427,20 @@ func (s *script) encryptArchive() error {
 	})
 
 	outFile, err := os.Create(gpgFile)
-	defer outFile.Close()
 	if err != nil {
 		return fmt.Errorf("encryptBackup: error opening out file: %w", err)
 	}
+	defer outFile.Close()
 
 	_, name := path.Split(s.file)
 	dst, err := openpgp.SymmetricallyEncrypt(outFile, []byte(s.c.GpgPassphrase), &openpgp.FileHints{
 		IsBinary: true,
 		FileName: name,
 	}, nil)
-	defer dst.Close()
 	if err != nil {
 		return fmt.Errorf("encryptBackup: error encrypting backup file: %w", err)
 	}
+	defer dst.Close()
 
 	src, err := os.Open(s.file)
 	if err != nil {
@@ -529,93 +471,12 @@ func (s *script) copyArchive() error {
 		}
 	}
 
-	if s.minioClient != nil {
-		if _, err := s.minioClient.FPutObject(context.Background(), s.c.AwsS3BucketName, filepath.Join(s.c.AwsS3Path, name), s.file, minio.PutObjectOptions{
-			ContentType:  "application/tar+gzip",
-			StorageClass: s.c.AwsStorageClass,
-		}); err != nil {
-			errResp := minio.ToErrorResponse(err)
-			return fmt.Errorf("copyBackup: error uploading backup to remote storage: [Message]: '%s', [Code]: %s, [StatusCode]: %d", errResp.Message, errResp.Code, errResp.StatusCode)
-		}
-		s.logger.Infof("Uploaded a copy of backup `%s` to bucket `%s`.", s.file, s.c.AwsS3BucketName)
-	}
-
-	if s.webdavClient != nil {
-		bytes, err := os.ReadFile(s.file)
-		if err != nil {
-			return fmt.Errorf("copyBackup: error reading the file to be uploaded: %w", err)
-		}
-		if err := s.webdavClient.MkdirAll(s.c.WebdavPath, 0644); err != nil {
-			return fmt.Errorf("copyBackup: error creating directory '%s' on WebDAV server: %w", s.c.WebdavPath, err)
-		}
-		if err := s.webdavClient.Write(filepath.Join(s.c.WebdavPath, name), bytes, 0644); err != nil {
-			return fmt.Errorf("copyBackup: error uploading the file to WebDAV server: %w", err)
-		}
-		s.logger.Infof("Uploaded a copy of backup `%s` to WebDAV-URL '%s' at path '%s'.", s.file, s.c.WebdavUrl, s.c.WebdavPath)
-	}
-
-	if s.sshClient != nil {
-		source, err := os.Open(s.file)
-		if err != nil {
-			return fmt.Errorf("copyBackup: error reading the file to be uploaded: %w", err)
-		}
-		defer source.Close()
-
-		destination, err := s.sftpClient.Create(filepath.Join(s.c.SSHRemotePath, name))
-		if err != nil {
-			return fmt.Errorf("copyBackup: error creating file on SSH storage: %w", err)
-		}
-		defer destination.Close()
-
-		chunk := make([]byte, 1000000)
-		for {
-			num, err := source.Read(chunk)
-			if err == io.EOF {
-				tot, err := destination.Write(chunk[:num])
-				if err != nil {
-					return fmt.Errorf("copyBackup: error uploading the file to SSH storage: %w", err)
-				}
-
-				if tot != len(chunk[:num]) {
-					return fmt.Errorf("sshClient: failed to write stream")
-				}
-
-				break
-			}
-
-			if err != nil {
-				return fmt.Errorf("copyBackup: error uploading the file to SSH storage: %w", err)
-			}
-
-			tot, err := destination.Write(chunk[:num])
-			if err != nil {
-				return fmt.Errorf("copyBackup: error uploading the file to SSH storage: %w", err)
-			}
-
-			if tot != len(chunk[:num]) {
-				return fmt.Errorf("sshClient: failed to write stream")
-			}
-		}
-
-		s.logger.Infof("Uploaded a copy of backup `%s` to SSH storage '%s' at path '%s'.", s.file, s.c.SSHHostName, s.c.SSHRemotePath)
-	}
-
-	if _, err := os.Stat(s.c.BackupArchive); !os.IsNotExist(err) {
-		if err := copyFile(s.file, path.Join(s.c.BackupArchive, name)); err != nil {
-			return fmt.Errorf("copyBackup: error copying file to local archive: %w", err)
-		}
-		s.logger.Infof("Stored copy of backup `%s` in local archive `%s`.", s.file, s.c.BackupArchive)
-		if s.c.BackupLatestSymlink != "" {
-			symlink := path.Join(s.c.BackupArchive, s.c.BackupLatestSymlink)
-			if _, err := os.Lstat(symlink); err == nil {
-				os.Remove(symlink)
-			}
-			if err := os.Symlink(name, symlink); err != nil {
-				return fmt.Errorf("copyBackup: error creating latest symlink: %w", err)
-			}
-			s.logger.Infof("Created/Updated symlink `%s` for latest backup.", s.c.BackupLatestSymlink)
+	for _, backend := range s.storages {
+		if err := backend.Copy(s.file); err != nil {
+			return err
 		}
 	}
+
 	return nil
 }
 
@@ -629,208 +490,18 @@ func (s *script) pruneBackups() error {
 
 	deadline := time.Now().AddDate(0, 0, -int(s.c.BackupRetentionDays)).Add(s.c.BackupPruningLeeway)
 
-	// doPrune holds general control flow that applies to any kind of storage.
-	// Callers can pass in a thunk that performs the actual deletion of files.
-	var doPrune = func(lenMatches, lenCandidates int, description string, doRemoveFiles func() error) error {
-		if lenMatches != 0 && lenMatches != lenCandidates {
-			if err := doRemoveFiles(); err != nil {
-				return err
+	for _, backend := range s.storages {
+		if stats, err := backend.Prune(deadline, s.c.BackupPruningPrefix); err == nil {
+			s.stats.Storages[backend.Name()] = StorageStats{
+				Total:  stats.Total,
+				Pruned: stats.Pruned,
 			}
-			s.logger.Infof(
-				"Pruned %d out of %d %s as their age exceeded the configured retention period of %d days.",
-				lenMatches,
-				lenCandidates,
-				description,
-				s.c.BackupRetentionDays,
-			)
-		} else if lenMatches != 0 && lenMatches == lenCandidates {
-			s.logger.Warnf("The current configuration would delete all %d existing %s.", lenMatches, description)
-			s.logger.Warn("Refusing to do so, please check your configuration.")
+
 		} else {
-			s.logger.Infof("None of %d existing %s were pruned.", lenCandidates, description)
+			return err
 		}
-		return nil
 	}
 
-	if s.minioClient != nil {
-		candidates := s.minioClient.ListObjects(context.Background(), s.c.AwsS3BucketName, minio.ListObjectsOptions{
-			WithMetadata: true,
-			Prefix:       filepath.Join(s.c.AwsS3Path, s.c.BackupPruningPrefix),
-			Recursive:    true,
-		})
-
-		var matches []minio.ObjectInfo
-		var lenCandidates int
-		for candidate := range candidates {
-			lenCandidates++
-			if candidate.Err != nil {
-				return fmt.Errorf(
-					"pruneBackups: error looking up candidates from remote storage: %w",
-					candidate.Err,
-				)
-			}
-			if candidate.LastModified.Before(deadline) {
-				matches = append(matches, candidate)
-			}
-		}
-
-		s.stats.Storages.S3 = StorageStats{
-			Total:  uint(lenCandidates),
-			Pruned: uint(len(matches)),
-		}
-
-		doPrune(len(matches), lenCandidates, "remote backup(s)", func() error {
-			objectsCh := make(chan minio.ObjectInfo)
-			go func() {
-				for _, match := range matches {
-					objectsCh <- match
-				}
-				close(objectsCh)
-			}()
-			errChan := s.minioClient.RemoveObjects(context.Background(), s.c.AwsS3BucketName, objectsCh, minio.RemoveObjectsOptions{})
-			var removeErrors []error
-			for result := range errChan {
-				if result.Err != nil {
-					removeErrors = append(removeErrors, result.Err)
-				}
-			}
-			if len(removeErrors) != 0 {
-				return join(removeErrors...)
-			}
-			return nil
-		})
-	}
-
-	if s.webdavClient != nil {
-		candidates, err := s.webdavClient.ReadDir(s.c.WebdavPath)
-		if err != nil {
-			return fmt.Errorf("pruneBackups: error looking up candidates from remote storage: %w", err)
-		}
-		var matches []fs.FileInfo
-		var lenCandidates int
-		for _, candidate := range candidates {
-			if !strings.HasPrefix(candidate.Name(), s.c.BackupPruningPrefix) {
-				continue
-			}
-			lenCandidates++
-			if candidate.ModTime().Before(deadline) {
-				matches = append(matches, candidate)
-			}
-		}
-
-		s.stats.Storages.WebDAV = StorageStats{
-			Total:  uint(lenCandidates),
-			Pruned: uint(len(matches)),
-		}
-
-		doPrune(len(matches), lenCandidates, "WebDAV backup(s)", func() error {
-			for _, match := range matches {
-				if err := s.webdavClient.Remove(filepath.Join(s.c.WebdavPath, match.Name())); err != nil {
-					return fmt.Errorf("pruneBackups: error removing file from WebDAV storage: %w", err)
-				}
-			}
-			return nil
-		})
-	}
-
-	if s.sshClient != nil {
-		candidates, err := s.sftpClient.ReadDir(s.c.SSHRemotePath)
-		if err != nil {
-			return fmt.Errorf("pruneBackups: error reading directory from SSH storage: %w", err)
-		}
-
-		var matches []string
-		for _, candidate := range candidates {
-			if !strings.HasPrefix(candidate.Name(), s.c.BackupPruningPrefix) {
-				continue
-			}
-			if candidate.ModTime().Before(deadline) {
-				matches = append(matches, candidate.Name())
-			}
-		}
-
-		s.stats.Storages.SSH = StorageStats{
-			Total:  uint(len(candidates)),
-			Pruned: uint(len(matches)),
-		}
-
-		doPrune(len(matches), len(candidates), "SSH backup(s)", func() error {
-			for _, match := range matches {
-				if err := s.sftpClient.Remove(filepath.Join(s.c.SSHRemotePath, match)); err != nil {
-					return fmt.Errorf("pruneBackups: error removing file from SSH storage: %w", err)
-				}
-			}
-			return nil
-		})
-	}
-
-	if _, err := os.Stat(s.c.BackupArchive); !os.IsNotExist(err) {
-		globPattern := path.Join(
-			s.c.BackupArchive,
-			fmt.Sprintf("%s*", s.c.BackupPruningPrefix),
-		)
-		globMatches, err := filepath.Glob(globPattern)
-		if err != nil {
-			return fmt.Errorf(
-				"pruneBackups: error looking up matching files using pattern %s: %w",
-				globPattern,
-				err,
-			)
-		}
-
-		var candidates []string
-		for _, candidate := range globMatches {
-			fi, err := os.Lstat(candidate)
-			if err != nil {
-				return fmt.Errorf(
-					"pruneBackups: error calling Lstat on file %s: %w",
-					candidate,
-					err,
-				)
-			}
-
-			if fi.Mode()&os.ModeSymlink != os.ModeSymlink {
-				candidates = append(candidates, candidate)
-			}
-		}
-
-		var matches []string
-		for _, candidate := range candidates {
-			fi, err := os.Stat(candidate)
-			if err != nil {
-				return fmt.Errorf(
-					"pruneBackups: error calling stat on file %s: %w",
-					candidate,
-					err,
-				)
-			}
-			if fi.ModTime().Before(deadline) {
-				matches = append(matches, candidate)
-			}
-		}
-
-		s.stats.Storages.Local = StorageStats{
-			Total:  uint(len(candidates)),
-			Pruned: uint(len(matches)),
-		}
-
-		doPrune(len(matches), len(candidates), "local backup(s)", func() error {
-			var removeErrors []error
-			for _, match := range matches {
-				if err := os.Remove(match); err != nil {
-					removeErrors = append(removeErrors, err)
-				}
-			}
-			if len(removeErrors) != 0 {
-				return fmt.Errorf(
-					"pruneBackups: %d error(s) deleting local files, starting with: %w",
-					len(removeErrors),
-					join(removeErrors...),
-				)
-			}
-			return nil
-		})
-	}
 	return nil
 }