Update golangci integration (#637)

* Update golangci integration

* Fix newly discovered errcheck complaints

* Increase timeout value

.github/workflows/golangci-lint.yml

@@ -7,7 +7,6 @@ on:
 
 permissions:
   contents: read
-  # Optional: allow read access to pull request. Use with `only-new-issues` option.
   pull-requests: read
 
 jobs:
@@ -15,40 +14,12 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
+      - uses: actions/checkout@v5
+      - uses: actions/setup-go@v6
         with:
-          go-version: '1.24'
-          cache: false
+          go-version: '1.25'
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v8
         with:
-          # Require: The version of golangci-lint to use.
-          # When `install-mode` is `binary` (default) the value can be v1.2 or v1.2.3 or `latest` to use the latest version.
-          # When `install-mode` is `goinstall` the value can be v1.2.3, `latest`, or the hash of a commit.
-          version: v1.64
-
-          # Optional: working directory, useful for monorepos
-          # working-directory: somedir
-
-          # Optional: golangci-lint command line arguments.
-          #
-          # Note: By default, the `.golangci.yml` file should be at the root of the repository.
-          # The location of the configuration file can be changed by using `--config=`
-          # args: --timeout=30m --config=/my/path/.golangci.yml --issues-exit-code=0
-
-          # Optional: show only new issues if it's a pull request. The default value is `false`.
-          # only-new-issues: true
-
-          # Optional: if set to true, then all caching functionality will be completely disabled,
-          #           takes precedence over all other caching options.
-          # skip-cache: true
-
-          # Optional: if set to true, then the action won't cache or restore ~/go/pkg.
-          # skip-pkg-cache: true
-
-          # Optional: if set to true, then the action won't cache or restore ~/.cache/go-build.
-          # skip-build-cache: true
-
-          # Optional: The mode to install golangci-lint. It can be 'binary' or 'goinstall'.
-          # install-mode: "goinstall"
+          version: v2.4
+          args: --timeout 5m

.github/workflows/unit.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.24.x'
+          go-version: '1.25.x'
       - name: Install dependencies
         run: go mod download
       - name: Test with the Go CLI

.golangci.yml

@@ -1,9 +1,7 @@
+version: '2'
 linters:
   # Enable specific linter
   # https://golangci-lint.run/usage/linters/#enabled-by-default
   enable:
     - staticcheck
     - govet
-output:
-  formats:
-    - format: colored-line-number

cmd/backup/archive.go

@@ -121,10 +121,11 @@ func getCompressionWriter(file *os.File, algo string, concurrency int) (io.Write
 	}
 }
 
-func writeTarball(path string, tarWriter *tar.Writer, prefix string) error {
+func writeTarball(path string, tarWriter *tar.Writer, prefix string) (returnErr error) {
 	fileInfo, err := os.Lstat(path)
 	if err != nil {
-		return errwrap.Wrap(err, fmt.Sprintf("error getting file info for %s", path))
+		returnErr = errwrap.Wrap(err, fmt.Sprintf("error getting file info for %s", path))
+		return
 	}
 
 	if fileInfo.Mode()&os.ModeSocket == os.ModeSocket {
@@ -135,19 +136,22 @@ func writeTarball(path string, tarWriter *tar.Writer, prefix string) error {
 	if fileInfo.Mode()&os.ModeSymlink == os.ModeSymlink {
 		var err error
 		if link, err = os.Readlink(path); err != nil {
-			return errwrap.Wrap(err, fmt.Sprintf("error resolving symlink %s", path))
+			returnErr = errwrap.Wrap(err, fmt.Sprintf("error resolving symlink %s", path))
+			return
 		}
 	}
 
 	header, err := tar.FileInfoHeader(fileInfo, link)
 	if err != nil {
-		return errwrap.Wrap(err, "error getting file info header")
+		returnErr = errwrap.Wrap(err, "error getting file info header")
+		return
 	}
 	header.Name = strings.TrimPrefix(path, prefix)
 
 	err = tarWriter.WriteHeader(header)
 	if err != nil {
-		return errwrap.Wrap(err, "error writing file info header")
+		returnErr = errwrap.Wrap(err, "error writing file info header")
+		return
 	}
 
 	if !fileInfo.Mode().IsRegular() {
@@ -156,13 +160,17 @@ func writeTarball(path string, tarWriter *tar.Writer, prefix string) error {
 
 	file, err := os.Open(path)
 	if err != nil {
-		return errwrap.Wrap(err, fmt.Sprintf("error opening %s", path))
+		returnErr = errwrap.Wrap(err, fmt.Sprintf("error opening %s", path))
+		return
 	}
-	defer file.Close()
+	defer func() {
+		returnErr = file.Close()
+	}()
 
 	_, err = io.Copy(tarWriter, file)
 	if err != nil {
-		return errwrap.Wrap(err, fmt.Sprintf("error copying %s to tar writer", path))
+		returnErr = errwrap.Wrap(err, fmt.Sprintf("error copying %s to tar writer", path))
+		return
 	}
 
 	return nil

cmd/backup/config_provider.go

@@ -153,13 +153,13 @@ func source(path string) (map[string]string, error) {
 			currentValue, currentOk := os.LookupEnv(key)
 			defer func() {
 				if currentOk {
-					os.Setenv(key, currentValue)
+					_ = os.Setenv(key, currentValue)
 					return
 				}
-				os.Unsetenv(key)
+				_ = os.Unsetenv(key)
 			}()
 			result[key] = value
-			os.Setenv(key, value)
+			_ = os.Setenv(key, value)
 		}
 	}
 	return result, nil

cmd/backup/config_provider_test.go

@@ -60,8 +60,10 @@ func TestSource(t *testing.T) {
 		},
 	}
 
-	os.Setenv("QUX", "yyy")
-	defer os.Unsetenv("QUX")
+	_ = os.Setenv("QUX", "yyy")
+	defer func() {
+		_ = os.Unsetenv("QUX")
+	}()
 
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {

cmd/backup/exec.go

@@ -177,8 +177,12 @@ func (s *script) runLabeledCommands(label string) error {
 			s.logger.Info(fmt.Sprintf("Running %s command %s for container %s", label, cmd, strings.TrimPrefix(c.Names[0], "/")))
 			stdout, stderr, err := s.exec(c.ID, cmd, user)
 			if s.c.ExecForwardOutput {
-				os.Stderr.Write(stderr)
-				os.Stdout.Write(stdout)
+				if _, err := os.Stderr.Write(stderr); err != nil {
+					return errwrap.Wrap(err, "error writing to stderr")
+				}
+				if _, err := os.Stdout.Write(stdout); err != nil {
+					return errwrap.Wrap(err, "error writing to stdout")
+				}
 			}
 			if err != nil {
 				return errwrap.Wrap(err, "error executing command")

cmd/backup/stop_restart.go

@@ -13,7 +13,6 @@ import (
 	"time"
 
 	"github.com/docker/cli/cli/command/service/progress"
-	"github.com/docker/docker/api/types/container"
 	ctr "github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/api/types/filters"
 	"github.com/docker/docker/api/types/swarm"
@@ -66,7 +65,7 @@ func awaitContainerCountForService(cli *client.Client, serviceID string, count i
 				),
 			)
 		case <-poll.C:
-			containers, err := cli.ContainerList(context.Background(), container.ListOptions{
+			containers, err := cli.ContainerList(context.Background(), ctr.ListOptions{
 				Filters: filters.NewArgs(filters.KeyValuePair{
 					Key:   "label",
 					Value: fmt.Sprintf("com.docker.swarm.service.id=%s", serviceID),
@@ -124,11 +123,11 @@ func (s *script) stopContainersAndServices() (func() error, error) {
 		labelValue,
 	)
 
-	allContainers, err := s.cli.ContainerList(context.Background(), container.ListOptions{})
+	allContainers, err := s.cli.ContainerList(context.Background(), ctr.ListOptions{})
 	if err != nil {
 		return noop, errwrap.Wrap(err, "error querying for containers")
 	}
-	containersToStop, err := s.cli.ContainerList(context.Background(), container.ListOptions{
+	containersToStop, err := s.cli.ContainerList(context.Background(), ctr.ListOptions{
 		Filters: filters.NewArgs(filters.KeyValuePair{
 			Key:   "label",
 			Value: filterMatchLabel,
@@ -215,7 +214,7 @@ func (s *script) stopContainersAndServices() (func() error, error) {
 		)
 	}
 
-	var stoppedContainers []container.Summary
+	var stoppedContainers []ctr.Summary
 	var stopErrors []error
 	for _, container := range containersToStop {
 		if err := s.cli.ContainerStop(context.Background(), container.ID, ctr.StopOptions{}); err != nil {

go.mod

@@ -1,6 +1,6 @@
 module github.com/offen/docker-volume-backup
 
-go 1.24.0
+go 1.25
 
 require (
 	filippo.io/age v1.2.1

internal/storage/dropbox/dropbox.go

@@ -87,7 +87,7 @@ func (b *dropboxStorage) Name() string {
 }
 
 // Copy copies the given file to the WebDav storage backend.
-func (b *dropboxStorage) Copy(file string) error {
+func (b *dropboxStorage) Copy(file string) (returnErr error) {
 	_, name := path.Split(file)
 
 	folderArg := files.NewCreateFolderArg(b.DestinationPath)
@@ -95,19 +95,24 @@ func (b *dropboxStorage) Copy(file string) error {
 		switch err := err.(type) {
 		case files.CreateFolderV2APIError:
 			if err.EndpointError.Path.Tag != files.WriteErrorConflict {
-				return errwrap.Wrap(err, fmt.Sprintf("error creating directory '%s'", b.DestinationPath))
+				returnErr = errwrap.Wrap(err, fmt.Sprintf("error creating directory '%s'", b.DestinationPath))
+				return
 			}
 			b.Log(storage.LogLevelInfo, b.Name(), "Destination path '%s' already exists, no new directory required.", b.DestinationPath)
 		default:
-			return errwrap.Wrap(err, fmt.Sprintf("error creating directory '%s'", b.DestinationPath))
+			returnErr = errwrap.Wrap(err, fmt.Sprintf("error creating directory '%s'", b.DestinationPath))
+			return
 		}
 	}
 
 	r, err := os.Open(file)
 	if err != nil {
-		return errwrap.Wrap(err, "error opening the file to be uploaded")
+		returnErr = errwrap.Wrap(err, "error opening the file to be uploaded")
+		return
 	}
-	defer r.Close()
+	defer func() {
+		returnErr = r.Close()
+	}()
 
 	// Start new upload session and get session id
 	b.Log(storage.LogLevelInfo, b.Name(), "Starting upload session for backup '%s' at path '%s'.", file, b.DestinationPath)
@@ -116,7 +121,8 @@ func (b *dropboxStorage) Copy(file string) error {
 	uploadSessionStartArg := files.NewUploadSessionStartArg()
 	uploadSessionStartArg.SessionType = &files.UploadSessionType{Tagged: dropbox.Tagged{Tag: files.UploadSessionTypeConcurrent}}
 	if res, err := b.client.UploadSessionStart(uploadSessionStartArg, nil); err != nil {
-		return errwrap.Wrap(err, "error starting the upload session")
+		returnErr = errwrap.Wrap(err, "error starting the upload session")
+		return
 	} else {
 		sessionId = res.SessionId
 	}
@@ -197,7 +203,8 @@ loop:
 			files.NewCommitInfo(path.Join(b.DestinationPath, name)),
 		), nil)
 	if err != nil {
-		return errwrap.Wrap(err, "error finishing the upload session")
+		returnErr = errwrap.Wrap(err, "error finishing the upload session")
+		return
 	}
 
 	b.Log(storage.LogLevelInfo, b.Name(), "Uploaded a copy of backup '%s' at path '%s'.", file, b.DestinationPath)

internal/storage/googledrive/googledrive.go

@@ -11,14 +11,14 @@ import (
 	"strings"
 	"time"
 
+	"crypto/tls"
 	"github.com/offen/docker-volume-backup/internal/errwrap"
 	"github.com/offen/docker-volume-backup/internal/storage"
+	"golang.org/x/oauth2"
 	"golang.org/x/oauth2/google"
 	"google.golang.org/api/drive/v3"
 	"google.golang.org/api/option"
-	"golang.org/x/oauth2"
 	"net/http"
-	"crypto/tls"
 )
 
 type googleDriveStorage struct {
@@ -84,15 +84,18 @@ func (b *googleDriveStorage) Name() string {
 }
 
 // Copy copies the given file to the Google Drive storage backend.
-func (b *googleDriveStorage) Copy(file string) error {
+func (b *googleDriveStorage) Copy(file string) (returnErr error) {
 	_, name := filepath.Split(file)
 	b.Log(storage.LogLevelInfo, b.Name(), "Starting upload for backup '%s'.", name)
 
 	f, err := os.Open(file)
 	if err != nil {
-		return errwrap.Wrap(err, fmt.Sprintf("failed to open file %s", file))
+		returnErr = errwrap.Wrap(err, fmt.Sprintf("failed to open file %s", file))
+		return
 	}
-	defer f.Close()
+	defer func() {
+		returnErr = f.Close()
+	}()
 
 	driveFile := &drive.File{Name: name}
 	if b.DestinationPath != "" {
@@ -104,7 +107,8 @@ func (b *googleDriveStorage) Copy(file string) error {
 	createCall := b.client.Files.Create(driveFile).SupportsAllDrives(true).Fields("id")
 	created, err := createCall.Media(f).Do()
 	if err != nil {
-		return errwrap.Wrap(err, fmt.Sprintf("failed to upload %s", name))
+		returnErr = errwrap.Wrap(err, fmt.Sprintf("failed to upload %s", name))
+		return
 	}
 
 	b.Log(storage.LogLevelInfo, b.Name(), "Finished upload for %s. File ID: %s", name, created.Id)

internal/storage/local/local.go

@@ -55,7 +55,9 @@ func (b *localStorage) Copy(file string) error {
 	if b.latestSymlink != "" {
 		symlink := path.Join(b.DestinationPath, b.latestSymlink)
 		if _, err := os.Lstat(symlink); err == nil {
-			os.Remove(symlink)
+			if err := os.Remove(symlink); err != nil {
+				return errwrap.Wrap(err, "error removing existing symlink")
+			}
 		}
 		if err := os.Symlink(name, symlink); err != nil {
 			return errwrap.Wrap(err, "error creating latest symlink")
@@ -146,22 +148,25 @@ func (b *localStorage) Prune(deadline time.Time, pruningPrefix string) (*storage
 }
 
 // copy creates a copy of the file located at `dst` at `src`.
-func copyFile(src, dst string) error {
+func copyFile(src, dst string) (returnErr error) {
 	in, err := os.Open(src)
 	if err != nil {
-		return err
+		returnErr = err
+		return
 	}
-	defer in.Close()
+	defer func() {
+		returnErr = in.Close()
+	}()
 
 	out, err := os.Create(dst)
 	if err != nil {
-		return err
+		returnErr = err
+		return
 	}
 
 	_, err = io.Copy(out, in)
 	if err != nil {
-		out.Close()
-		return err
+		return errors.Join(err, out.Close())
 	}
 	return out.Close()
 }

internal/storage/ssh/ssh.go

@@ -106,19 +106,25 @@ func (b *sshStorage) Name() string {
 }
 
 // Copy copies the given file to the SSH storage backend.
-func (b *sshStorage) Copy(file string) error {
+func (b *sshStorage) Copy(file string) (returnErr error) {
 	source, err := os.Open(file)
 	_, name := path.Split(file)
 	if err != nil {
-		return errwrap.Wrap(err, " error reading the file to be uploaded")
+		returnErr = errwrap.Wrap(err, " error reading the file to be uploaded")
+		return
 	}
-	defer source.Close()
+	defer func() {
+		returnErr = source.Close()
+	}()
 
 	destination, err := b.sftpClient.Create(path.Join(b.DestinationPath, name))
 	if err != nil {
-		return errwrap.Wrap(err, "error creating file")
+		returnErr = errwrap.Wrap(err, "error creating file")
+		return
 	}
-	defer destination.Close()
+	defer func() {
+		returnErr = destination.Close()
+	}()
 
 	chunk := make([]byte, 1e9)
 	for {
@@ -126,27 +132,32 @@ func (b *sshStorage) Copy(file string) error {
 		if err == io.EOF {
 			tot, err := destination.Write(chunk[:num])
 			if err != nil {
-				return errwrap.Wrap(err, "error uploading the file")
+				returnErr = errwrap.Wrap(err, "error uploading the file")
+				return
 			}
 
 			if tot != len(chunk[:num]) {
-				return errwrap.Wrap(nil, "failed to write stream")
+				returnErr = errwrap.Wrap(nil, "failed to write stream")
+				return
 			}
 
 			break
 		}
 
 		if err != nil {
-			return errwrap.Wrap(err, "error uploading the file")
+			returnErr = errwrap.Wrap(err, "error uploading the file")
+			return
 		}
 
 		tot, err := destination.Write(chunk[:num])
 		if err != nil {
-			return errwrap.Wrap(err, "error uploading the file")
+			returnErr = errwrap.Wrap(err, "error uploading the file")
+			return
 		}
 
 		if tot != len(chunk[:num]) {
-			return errwrap.Wrap(nil, "failed to write stream")
+			returnErr = errwrap.Wrap(nil, "failed to write stream")
+			return
 		}
 	}