Backend registering is platform-dependent

internal/registry/doc.go

@@ -0,0 +1,2 @@
+// Package registry provides platform-dependent components at compile time.
+package registry

internal/registry/registry_unix.go

@@ -0,0 +1,10 @@
+//go:build unix && (!darwin)
+package registry
+
+import "git.tebibyte.media/tomo/x"
+import "git.tebibyte.media/tomo/tomo"
+
+func Init () error {
+	tomo.Register(1, x.NewBackend)
+	return nil
+}