Virtual mtime support for environments that don't support altering mtimes (fixes #831)

internal/db/namespaced.go

@@ -111,6 +111,24 @@ func (n NamespacedKV) String(key string) (string, bool) {
 	return string(valBs), true
 }
 
+// PutBytes stores a new byte slice. Any existing value (even if of another type)
+// is overwritten.
+func (n *NamespacedKV) PutBytes(key string, val []byte) {
+	keyBs := append(n.prefix, []byte(key)...)
+	n.db.Put(keyBs, val, nil)
+}
+
+// Bytes returns the stored value as a raw byte slice and a boolean that
+// is false if no value was stored at the key.
+func (n NamespacedKV) Bytes(key string) ([]byte, bool) {
+	keyBs := append(n.prefix, []byte(key)...)
+	valBs, err := n.db.Get(keyBs, nil)
+	if err != nil {
+		return nil, false
+	}
+	return valBs, true
+}
+
 // Delete deletes the specified key. It is allowed to delete a nonexistent
 // key.
 func (n NamespacedKV) Delete(key string) {