Refactor repo

file_system.go

@@ -0,0 +1,18 @@
+package litestream
+
+import (
+	"bazil.org/fuse/fs"
+)
+
+var _ fs.FS = (*FileSystem)(nil)
+
+// FileSystem represents the file system that is mounted.
+// It returns a root node that represents the root directory.
+type FileSystem struct {
+	SourcePath string
+}
+
+// Root returns the file system root node.
+func (f *FileSystem) Root() (fs.Node, error) {
+	return &Node{fs: f}, nil
+}