Make inodeFromBackendId more explicit

cmd/restic/fuse/dir.go

@@ -1,7 +1,6 @@
 package fuse
 
 import (
-	"encoding/binary"
 	"os"
 
 	"bazil.org/fuse"
@@ -52,7 +51,7 @@ func newDirFromSnapshot(repo *repository.Repository, snapshot SnapshotWithId) (*
 	return &dir{
 		repo:     repo,
 		children: children,
-		inode:    binary.BigEndian.Uint64(snapshot.ID),
+		inode:    inodeFromBackendId(snapshot.ID),
 	}, nil
 }
 

cmd/restic/fuse/fuse.go

@@ -0,0 +1,14 @@
+package fuse
+
+import (
+	"encoding/binary"
+
+	"github.com/restic/restic/backend"
+)
+
+// inodeFromBackendId returns a unique uint64 from a backend id.
+// Endianness has no specific meaning, it is just the simplest way to
+// transform a []byte to an uint64
+func inodeFromBackendId(id backend.ID) uint64 {
+	return binary.BigEndian.Uint64(id[:8])
+}

cmd/restic/fuse/snapshot.go

@@ -1,7 +1,6 @@
 package fuse
 
 import (
-	"encoding/binary"
 	"os"
 	"sync"
 	"time"
@@ -80,7 +79,7 @@ func (sn *SnapshotsDir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
 	ret := make([]fuse.Dirent, 0)
 	for _, snapshot := range sn.knownSnapshots {
 		ret = append(ret, fuse.Dirent{
-			Inode: binary.BigEndian.Uint64(snapshot.ID[:8]),
+			Inode: inodeFromBackendId(snapshot.ID),
 			Type:  fuse.DT_Dir,
 			Name:  snapshot.Time.Format(time.RFC3339),
 		})