index: md5: handle missing files and cloud versioned files missing ve…

…rsion_id

src/dvc_data/index/index.py

@@ -259,9 +259,17 @@ def get(self, entry: "DataIndexEntry") -> Tuple["FileSystem", str]:
         assert entry.key is not None
         assert entry.key[: len(self.prefix)] == self.prefix
         path = self.fs.join(self.path, *entry.key[len(self.prefix) :])
-        if self.fs.version_aware and entry.meta and entry.meta.version_id:
-            path = self.fs.version_path(path, entry.meta.version_id)
-        return self.fs, path
+
+        if not self.fs.version_aware:
+            return self.fs, path
+
+        if not entry.meta or entry.meta.isdir:
+            return self.fs, path
+
+        if entry.meta and entry.meta.version_id:
+            return self.fs, self.fs.version_path(path, entry.meta.version_id)
+
+        raise ValueError(f"Missing version_id for {path}")
 
     def exists(self, entry: "DataIndexEntry", refresh: bool = False) -> bool:
         if self.index is None:

src/dvc_data/index/save.py

@@ -35,7 +35,10 @@ def md5(
         if entry.hash_info and entry.hash_info.name in ("md5", "md5-dos2unix"):
             continue
 
-        fs, path = index.storage_map.get_storage(entry, storage)
+        try:
+            fs, path = index.storage_map.get_storage(entry, storage)
+        except ValueError:
+            continue
 
         info = None
         if check_meta:
@@ -48,7 +51,11 @@ def md5(
             if entry.meta != meta:
                 continue
 
-        meta, hash_info = hash_file(path, fs, name, state=state, info=info)
+        try:
+            _, hash_info = hash_file(path, fs, name, state=state, info=info)
+        except FileNotFoundError:
+            continue
+
         entries[key] = DataIndexEntry(
             key=entry.key,
             meta=entry.meta,
@@ -126,7 +133,12 @@ def save(
         if entry.meta and entry.meta.isdir:
             dir_entries.append(key)
             continue
-        fs, path = index.storage_map.get_storage(entry, storage)
+
+        try:
+            fs, path = index.storage_map.get_storage(entry, storage)
+        except ValueError:
+            continue
+
         if entry.hash_info:
             cache = odb or index.storage_map.get_cache_odb(entry)
             assert cache