[Update] 互換性のために古いモデルのディレクトリ名を変更する機能を追加

src-python/models/translation/translation_utils.py

@@ -1,5 +1,6 @@
 from os import path as os_path
 from os import makedirs as os_makedirs
+from os import rename as os_rename
 from requests import get as requests_get
 from typing import Callable
 import transformers
@@ -50,6 +51,19 @@ ctranslate2_weights = {
 def checkCTranslate2Weight(root: str, weight_type: str = "m2m100_418M-ct2-int8"):
     weight_directory_name = ctranslate2_weights[weight_type]["directory_name"]
     path = os_path.join(root, "weights", "ctranslate2", weight_directory_name)
+
+    # 後方互換のためファイル名を変更する
+    legacy_dirs = {
+        "m2m100_418M-ct2-int8": "m2m100_418M",
+        "m2m100_1.2B-ct2-int8": "m2m100_12b",
+    }
+
+    legacy_dir = legacy_dirs.get(weight_type, None)
+    if legacy_dir:
+        old_path = os_path.join(root, "weights", "ctranslate2", legacy_dir)
+        if os_path.isdir(old_path):
+            os_rename(old_path, path)
+
     try:
         # モデルロード可能かどうかで判定
         compute_type = getBestComputeType("cpu", 0)