Refactor backends

backend/paths.go

@@ -0,0 +1,27 @@
+package backend
+
+import "os"
+
+// Default paths for file-based backends (e.g. local)
+var Paths = struct {
+	Data      string
+	Snapshots string
+	Trees     string
+	Locks     string
+	Keys      string
+	Temp      string
+	Version   string
+	ID        string
+}{
+	"data",
+	"snapshots",
+	"trees",
+	"locks",
+	"keys",
+	"tmp",
+	"version",
+	"id",
+}
+
+// Default modes for file-based backends
+var Modes = struct{ Dir, File os.FileMode }{0700, 0600}