add basic support for leveldb

game_backuper/leveldb.py

@@ -0,0 +1,30 @@
+try:
+    from plyvel import DB
+    have_leveldb = True
+    from typing import List
+except ImportError:
+    have_leveldb = False
+
+
+if have_leveldb:
+    def list_leveldb_entries(db: str, dms: List[bytes] = None):
+        d = DB(db)
+        r = []
+        for i in d.iterator(include_value=False):
+            if isinstance(i, bytes):
+                if dms is None:
+                    r.append(i)
+                else:
+                    if i == b'VERSION':
+                        r.append(i)
+                    elif i.startswith(b'META:'):
+                        dm = i[5:]
+                        if dm in dms:
+                            r.append(i)
+                    elif i.startswith(b'_'):
+                        dmi = i.find(b'\x00\x01')
+                        dm = i[1:dmi]
+                        if dm in dms:
+                            r.append(i)
+        r.sort()
+        return r