Use _ as parameter name for unused Context

The context is required by the implemented interface.

cmd/restic/integration_test.go

@@ -1601,7 +1601,7 @@ type appendOnlyBackend struct {
 }
 
 // called via repo.Backend().Remove()
-func (b *appendOnlyBackend) Remove(ctx context.Context, h restic.Handle) error {
+func (b *appendOnlyBackend) Remove(_ context.Context, h restic.Handle) error {
 	return errors.Errorf("Failed to remove %v", h)
 }
 

internal/archiver/archiver_test.go

@@ -1845,27 +1845,27 @@ type noCancelBackend struct {
 	restic.Backend
 }
 
-func (c *noCancelBackend) Remove(ctx context.Context, h restic.Handle) error {
+func (c *noCancelBackend) Remove(_ context.Context, h restic.Handle) error {
 	return c.Backend.Remove(context.Background(), h)
 }
 
-func (c *noCancelBackend) Save(ctx context.Context, h restic.Handle, rd restic.RewindReader) error {
+func (c *noCancelBackend) Save(_ context.Context, h restic.Handle, rd restic.RewindReader) error {
 	return c.Backend.Save(context.Background(), h, rd)
 }
 
-func (c *noCancelBackend) Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
+func (c *noCancelBackend) Load(_ context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
 	return c.Backend.Load(context.Background(), h, length, offset, fn)
 }
 
-func (c *noCancelBackend) Stat(ctx context.Context, h restic.Handle) (restic.FileInfo, error) {
+func (c *noCancelBackend) Stat(_ context.Context, h restic.Handle) (restic.FileInfo, error) {
 	return c.Backend.Stat(context.Background(), h)
 }
 
-func (c *noCancelBackend) List(ctx context.Context, t restic.FileType, fn func(restic.FileInfo) error) error {
+func (c *noCancelBackend) List(_ context.Context, t restic.FileType, fn func(restic.FileInfo) error) error {
 	return c.Backend.List(context.Background(), t, fn)
 }
 
-func (c *noCancelBackend) Delete(ctx context.Context) error {
+func (c *noCancelBackend) Delete(_ context.Context) error {
 	return c.Backend.Delete(context.Background())
 }
 

internal/archiver/blob_saver_test.go

@@ -22,7 +22,7 @@ type saveFail struct {
 	failAt int32
 }
 
-func (b *saveFail) SaveBlob(ctx context.Context, t restic.BlobType, buf []byte, id restic.ID, storeDuplicates bool) (restic.ID, bool, int, error) {
+func (b *saveFail) SaveBlob(_ context.Context, t restic.BlobType, buf []byte, id restic.ID, storeDuplicates bool) (restic.ID, bool, int, error) {
 	val := atomic.AddInt32(&b.cnt, 1)
 	if val == b.failAt {
 		return restic.ID{}, false, 0, errTest

internal/archiver/tree_saver_test.go

@@ -12,7 +12,7 @@ import (
 	"golang.org/x/sync/errgroup"
 )
 
-func treeSaveHelper(ctx context.Context, t restic.BlobType, buf *Buffer, cb func(res SaveBlobResponse)) {
+func treeSaveHelper(_ context.Context, t restic.BlobType, buf *Buffer, cb func(res SaveBlobResponse)) {
 	cb(SaveBlobResponse{
 		id:         restic.NewRandomID(),
 		known:      false,

internal/backend/azure/azure.go

@@ -108,7 +108,7 @@ func open(cfg Config, rt http.RoundTripper) (*Backend, error) {
 }
 
 // Open opens the Azure backend at specified container.
-func Open(ctx context.Context, cfg Config, rt http.RoundTripper) (*Backend, error) {
+func Open(_ context.Context, cfg Config, rt http.RoundTripper) (*Backend, error) {
 	return open(cfg, rt)
 }
 

internal/backend/dryrun/dry_backend.go

@@ -28,7 +28,7 @@ func New(be restic.Backend) *Backend {
 }
 
 // Save adds new Data to the backend.
-func (be *Backend) Save(ctx context.Context, h restic.Handle, rd restic.RewindReader) error {
+func (be *Backend) Save(_ context.Context, h restic.Handle, _ restic.RewindReader) error {
 	if err := h.Valid(); err != nil {
 		return err
 	}
@@ -38,7 +38,7 @@ func (be *Backend) Save(ctx context.Context, h restic.Handle, rd restic.RewindRe
 }
 
 // Remove deletes a file from the backend.
-func (be *Backend) Remove(ctx context.Context, h restic.Handle) error {
+func (be *Backend) Remove(_ context.Context, _ restic.Handle) error {
 	return nil
 }
 
@@ -52,7 +52,7 @@ func (be *Backend) Location() string {
 }
 
 // Delete removes all data in the backend.
-func (be *Backend) Delete(ctx context.Context) error {
+func (be *Backend) Delete(_ context.Context) error {
 	return nil
 }
 

internal/backend/layout/layout.go

@@ -37,7 +37,7 @@ type LocalFilesystem struct {
 }
 
 // ReadDir returns all entries of a directory.
-func (l *LocalFilesystem) ReadDir(ctx context.Context, dir string) ([]os.FileInfo, error) {
+func (l *LocalFilesystem) ReadDir(_ context.Context, dir string) ([]os.FileInfo, error) {
 	f, err := fs.Open(dir)
 	if err != nil {
 		return nil, err

internal/backend/local/local.go

@@ -105,7 +105,7 @@ func (b *Local) IsNotExist(err error) bool {
 }
 
 // Save stores data in the backend at the handle.
-func (b *Local) Save(ctx context.Context, h restic.Handle, rd restic.RewindReader) (err error) {
+func (b *Local) Save(_ context.Context, h restic.Handle, rd restic.RewindReader) (err error) {
 	finalname := b.Filename(h)
 	dir := filepath.Dir(finalname)
 
@@ -200,7 +200,7 @@ func (b *Local) Load(ctx context.Context, h restic.Handle, length int, offset in
 	return backend.DefaultLoad(ctx, h, length, offset, b.openReader, fn)
 }
 
-func (b *Local) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
+func (b *Local) openReader(_ context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
 	f, err := fs.Open(b.Filename(h))
 	if err != nil {
 		return nil, err
@@ -222,7 +222,7 @@ func (b *Local) openReader(ctx context.Context, h restic.Handle, length int, off
 }
 
 // Stat returns information about a blob.
-func (b *Local) Stat(ctx context.Context, h restic.Handle) (restic.FileInfo, error) {
+func (b *Local) Stat(_ context.Context, h restic.Handle) (restic.FileInfo, error) {
 	fi, err := fs.Stat(b.Filename(h))
 	if err != nil {
 		return restic.FileInfo{}, errors.WithStack(err)
@@ -232,7 +232,7 @@ func (b *Local) Stat(ctx context.Context, h restic.Handle) (restic.FileInfo, err
 }
 
 // Remove removes the blob with the given name and type.
-func (b *Local) Remove(ctx context.Context, h restic.Handle) error {
+func (b *Local) Remove(_ context.Context, h restic.Handle) error {
 	fn := b.Filename(h)
 
 	// reset read-only flag
@@ -339,7 +339,7 @@ func visitFiles(ctx context.Context, dir string, fn func(restic.FileInfo) error,
 }
 
 // Delete removes the repository and all files.
-func (b *Local) Delete(ctx context.Context) error {
+func (b *Local) Delete(_ context.Context) error {
 	return fs.RemoveAll(b.Path)
 }
 

internal/backend/rest/rest_test.go

@@ -67,7 +67,7 @@ func runRESTServer(ctx context.Context, t testing.TB, dir string) (*url.URL, fun
 	return url, cleanup
 }
 
-func newTestSuite(ctx context.Context, t testing.TB, url *url.URL, minimalData bool) *test.Suite {
+func newTestSuite(_ context.Context, t testing.TB, url *url.URL, minimalData bool) *test.Suite {
 	tr, err := backend.Transport(backend.TransportOptions{})
 	if err != nil {
 		t.Fatalf("cannot create transport for tests: %v", err)

internal/backend/sftp/sftp.go

@@ -187,7 +187,7 @@ func (r *SFTP) Join(p ...string) string {
 }
 
 // ReadDir returns the entries for a directory.
-func (r *SFTP) ReadDir(ctx context.Context, dir string) ([]os.FileInfo, error) {
+func (r *SFTP) ReadDir(_ context.Context, dir string) ([]os.FileInfo, error) {
 	fi, err := r.c.ReadDir(dir)
 
 	// sftp client does not specify dir name on error, so add it here
@@ -296,7 +296,7 @@ func tempSuffix() string {
 }
 
 // Save stores data in the backend at the handle.
-func (r *SFTP) Save(ctx context.Context, h restic.Handle, rd restic.RewindReader) error {
+func (r *SFTP) Save(_ context.Context, h restic.Handle, rd restic.RewindReader) error {
 	if err := r.clientError(); err != nil {
 		return err
 	}
@@ -400,7 +400,7 @@ func (r *SFTP) Load(ctx context.Context, h restic.Handle, length int, offset int
 	return backend.DefaultLoad(ctx, h, length, offset, r.openReader, fn)
 }
 
-func (r *SFTP) openReader(ctx context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
+func (r *SFTP) openReader(_ context.Context, h restic.Handle, length int, offset int64) (io.ReadCloser, error) {
 	f, err := r.c.Open(r.Filename(h))
 	if err != nil {
 		return nil, err
@@ -424,7 +424,7 @@ func (r *SFTP) openReader(ctx context.Context, h restic.Handle, length int, offs
 }
 
 // Stat returns information about a blob.
-func (r *SFTP) Stat(ctx context.Context, h restic.Handle) (restic.FileInfo, error) {
+func (r *SFTP) Stat(_ context.Context, h restic.Handle) (restic.FileInfo, error) {
 	if err := r.clientError(); err != nil {
 		return restic.FileInfo{}, err
 	}
@@ -438,7 +438,7 @@ func (r *SFTP) Stat(ctx context.Context, h restic.Handle) (restic.FileInfo, erro
 }
 
 // Remove removes the content stored at name.
-func (r *SFTP) Remove(ctx context.Context, h restic.Handle) error {
+func (r *SFTP) Remove(_ context.Context, h restic.Handle) error {
 	if err := r.clientError(); err != nil {
 		return err
 	}

internal/cache/backend_test.go

@@ -118,7 +118,7 @@ type loadErrorBackend struct {
 	loadError error
 }
 
-func (be loadErrorBackend) Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
+func (be loadErrorBackend) Load(_ context.Context, _ restic.Handle, _ int, _ int64, _ func(rd io.Reader) error) error {
 	time.Sleep(10 * time.Millisecond)
 	return be.loadError
 }

internal/fuse/dir.go

@@ -120,7 +120,7 @@ func (d *dir) open(ctx context.Context) error {
 	return nil
 }
 
-func (d *dir) Attr(ctx context.Context, a *fuse.Attr) error {
+func (d *dir) Attr(_ context.Context, a *fuse.Attr) error {
 	debug.Log("Attr()")
 	a.Inode = d.inode
 	a.Mode = os.ModeDir | d.node.Mode
@@ -221,7 +221,7 @@ func (d *dir) Lookup(ctx context.Context, name string) (fs.Node, error) {
 	}
 }
 
-func (d *dir) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
+func (d *dir) Listxattr(_ context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
 	debug.Log("Listxattr(%v, %v)", d.node.Name, req.Size)
 	for _, attr := range d.node.ExtendedAttributes {
 		resp.Append(attr.Name)
@@ -229,7 +229,7 @@ func (d *dir) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *f
 	return nil
 }
 
-func (d *dir) Getxattr(ctx context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
+func (d *dir) Getxattr(_ context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
 	debug.Log("Getxattr(%v, %v, %v)", d.node.Name, req.Name, req.Size)
 	attrval := d.node.GetExtendedAttribute(req.Name)
 	if attrval != nil {

internal/fuse/file.go

@@ -45,7 +45,7 @@ func newFile(root *Root, inode uint64, node *restic.Node) (fusefile *file, err e
 	}, nil
 }
 
-func (f *file) Attr(ctx context.Context, a *fuse.Attr) error {
+func (f *file) Attr(_ context.Context, a *fuse.Attr) error {
 	debug.Log("Attr(%v)", f.node.Name)
 	a.Inode = f.inode
 	a.Mode = f.node.Mode
@@ -66,7 +66,7 @@ func (f *file) Attr(ctx context.Context, a *fuse.Attr) error {
 
 }
 
-func (f *file) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {
+func (f *file) Open(_ context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fs.Handle, error) {
 	debug.Log("open file %v with %d blobs", f.node.Name, len(f.node.Content))
 
 	var bytes uint64
@@ -166,7 +166,7 @@ func (f *openFile) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.R
 	return nil
 }
 
-func (f *file) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
+func (f *file) Listxattr(_ context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
 	debug.Log("Listxattr(%v, %v)", f.node.Name, req.Size)
 	for _, attr := range f.node.ExtendedAttributes {
 		resp.Append(attr.Name)
@@ -174,7 +174,7 @@ func (f *file) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *
 	return nil
 }
 
-func (f *file) Getxattr(ctx context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
+func (f *file) Getxattr(_ context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
 	debug.Log("Getxattr(%v, %v, %v)", f.node.Name, req.Name, req.Size)
 	attrval := f.node.GetExtendedAttribute(req.Name)
 	if attrval != nil {

internal/fuse/link.go

@@ -24,11 +24,11 @@ func newLink(root *Root, inode uint64, node *restic.Node) (*link, error) {
 	return &link{root: root, inode: inode, node: node}, nil
 }
 
-func (l *link) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string, error) {
+func (l *link) Readlink(_ context.Context, req *fuse.ReadlinkRequest) (string, error) {
 	return l.node.LinkTarget, nil
 }
 
-func (l *link) Attr(ctx context.Context, a *fuse.Attr) error {
+func (l *link) Attr(_ context.Context, a *fuse.Attr) error {
 	a.Inode = l.inode
 	a.Mode = l.node.Mode
 

internal/fuse/other.go

@@ -20,11 +20,11 @@ func newOther(root *Root, inode uint64, node *restic.Node) (*other, error) {
 	return &other{root: root, inode: inode, node: node}, nil
 }
 
-func (l *other) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string, error) {
+func (l *other) Readlink(_ context.Context, req *fuse.ReadlinkRequest) (string, error) {
 	return l.node.LinkTarget, nil
 }
 
-func (l *other) Attr(ctx context.Context, a *fuse.Attr) error {
+func (l *other) Attr(_ context.Context, a *fuse.Attr) error {
 	a.Inode = l.inode
 	a.Mode = l.node.Mode
 

internal/fuse/snapshots_dir.go

@@ -42,7 +42,7 @@ func NewSnapshotsDir(root *Root, inode, parentInode uint64, dirStruct *Snapshots
 }
 
 // Attr returns the attributes for any dir in the snapshots directory structure
-func (d *SnapshotsDir) Attr(ctx context.Context, attr *fuse.Attr) error {
+func (d *SnapshotsDir) Attr(_ context.Context, attr *fuse.Attr) error {
 	attr.Inode = d.inode
 	attr.Mode = os.ModeDir | 0555
 	attr.Uid = d.root.uid
@@ -134,12 +134,12 @@ func newSnapshotLink(root *Root, inode uint64, target string, snapshot *restic.S
 }
 
 // Readlink
-func (l *snapshotLink) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string, error) {
+func (l *snapshotLink) Readlink(_ context.Context, req *fuse.ReadlinkRequest) (string, error) {
 	return l.target, nil
 }
 
 // Attr
-func (l *snapshotLink) Attr(ctx context.Context, a *fuse.Attr) error {
+func (l *snapshotLink) Attr(_ context.Context, a *fuse.Attr) error {
 	a.Inode = l.inode
 	a.Mode = os.ModeSymlink | 0777
 	a.Size = uint64(len(l.target))

internal/migrations/s3_layout.go

@@ -39,7 +39,7 @@ func toS3Backend(b restic.Backend) *s3.Backend {
 }
 
 // Check tests whether the migration can be applied.
-func (m *S3Layout) Check(ctx context.Context, repo restic.Repository) (bool, string, error) {
+func (m *S3Layout) Check(_ context.Context, repo restic.Repository) (bool, string, error) {
 	be := toS3Backend(repo.Backend())
 	if be == nil {
 		debug.Log("backend is not s3")

internal/migrations/upgrade_repo_v2.go

@@ -44,7 +44,7 @@ func (*UpgradeRepoV2) Desc() string {
 	return "upgrade a repository to version 2"
 }
 
-func (*UpgradeRepoV2) Check(ctx context.Context, repo restic.Repository) (bool, string, error) {
+func (*UpgradeRepoV2) Check(_ context.Context, repo restic.Repository) (bool, string, error) {
 	isV1 := repo.Config().Version == 1
 	reason := ""
 	if !isV1 {

internal/restic/config_test.go

@@ -12,7 +12,7 @@ type saver struct {
 	fn func(restic.FileType, []byte) (restic.ID, error)
 }
 
-func (s saver) SaveUnpacked(ctx context.Context, t restic.FileType, buf []byte) (restic.ID, error) {
+func (s saver) SaveUnpacked(_ context.Context, t restic.FileType, buf []byte) (restic.ID, error) {
 	return s.fn(t, buf)
 }
 
@@ -24,7 +24,7 @@ type loader struct {
 	fn func(restic.FileType, restic.ID) ([]byte, error)
 }
 
-func (l loader) LoadUnpacked(ctx context.Context, t restic.FileType, id restic.ID) (data []byte, err error) {
+func (l loader) LoadUnpacked(_ context.Context, t restic.FileType, id restic.ID) (data []byte, err error) {
 	return l.fn(t, id)
 }
 

internal/walker/rewriter_test.go

@@ -15,7 +15,7 @@ type WritableTreeMap struct {
 	TreeMap
 }
 
-func (t WritableTreeMap) SaveBlob(ctx context.Context, tpe restic.BlobType, buf []byte, id restic.ID, storeDuplicate bool) (newID restic.ID, known bool, size int, err error) {
+func (t WritableTreeMap) SaveBlob(_ context.Context, tpe restic.BlobType, buf []byte, id restic.ID, _ bool) (newID restic.ID, known bool, size int, err error) {
 	if tpe != restic.TreeBlob {
 		return restic.ID{}, false, 0, errors.New("can only save trees")
 	}

internal/walker/walker_test.go

@@ -76,7 +76,7 @@ func buildTreeMap(tree TestTree, m TreeMap) restic.ID {
 // TreeMap returns the trees from the map on LoadTree.
 type TreeMap map[restic.ID][]byte
 
-func (t TreeMap) LoadBlob(ctx context.Context, tpe restic.BlobType, id restic.ID, buf []byte) ([]byte, error) {
+func (t TreeMap) LoadBlob(_ context.Context, tpe restic.BlobType, id restic.ID, _ []byte) ([]byte, error) {
 	if tpe != restic.TreeBlob {
 		return nil, errors.New("can only load trees")
 	}