非推奨化されたdistutils.versionへの依存をなくし、python-semverに移行する

run.py

@@ -9,7 +9,6 @@
 import sys
 import traceback
 import zipfile
-from distutils.version import LooseVersion
 from functools import lru_cache
 from io import TextIOWrapper
 from pathlib import Path
@@ -78,6 +77,7 @@
     delete_file,
     engine_root,
 )
+from voicevox_engine.utility.core_version import get_latest_core_version
 
 
 def b64encode_str(s):
@@ -1176,7 +1176,7 @@ def setting_post(
         load_all_models=args.load_all_models,
     )
     assert len(synthesis_engines) != 0, "音声合成エンジンがありません。"
-    latest_core_version = str(max([LooseVersion(ver) for ver in synthesis_engines]))
+    latest_core_version = get_latest_core_version(versions=synthesis_engines.keys())
 
     cancellable_engine = None
     if args.enable_cancellable_synthesis:

test/test_core_version.py

@@ -0,0 +1,31 @@
+from unittest import TestCase
+
+from voicevox_engine.utility.core_version import (
+    get_latest_core_version,
+    parse_core_version,
+)
+
+
+class TestCoreVersion(TestCase):
+    def test_parse_core_version(self):
+        parse_core_version("0.1.0")
+        parse_core_version("0.10.preview.1")
+        parse_core_version("0.10.0")
+        parse_core_version("0.14.0")
+        parse_core_version("0.14.0.preview.1")
+        parse_core_version("0.14.0.preview.10")
+
+    def test_get_latest_core_version(self):
+        self.assertEqual(
+            get_latest_core_version(
+                versions=[
+                    "0.1.0",
+                    "0.10.preview.1",
+                    "0.10.0",
+                    "0.14.0",
+                    "0.14.0.preview.1",
+                    "0.14.0.preview.10",
+                ]
+            ),
+            "0.14.0",
+        )

voicevox_engine/cancellable_engine.py

@@ -1,7 +1,6 @@
 import argparse
 import asyncio
 import queue
-from distutils.version import LooseVersion
 from multiprocessing import Pipe, Process
 from multiprocessing.connection import Connection
 from tempfile import NamedTemporaryFile
@@ -14,6 +13,7 @@
 
 from .model import AudioQuery
 from .synthesis_engine import make_synthesis_engines
+from .utility.core_version import get_latest_core_version
 
 
 class CancellableEngine:
@@ -197,7 +197,7 @@ def start_synthesis_subprocess(
         enable_mock=args.enable_mock,
     )
     assert len(synthesis_engines) != 0, "音声合成エンジンがありません。"
-    latest_core_version = str(max([LooseVersion(ver) for ver in synthesis_engines]))
+    latest_core_version = get_latest_core_version(versions=synthesis_engines.keys())
     while True:
         try:
             query, speaker_id, core_version = sub_proc_con.recv()

voicevox_engine/utility/__init__.py

@@ -1,3 +1,4 @@
+from . import core_version
 from .connect_base64_waves import (
     ConnectBase64WavesException,
     connect_base64_waves,
@@ -9,6 +10,7 @@
     "ConnectBase64WavesException",
     "connect_base64_waves",
     "decode_base64_waves",
+    "core_version",
     "delete_file",
     "engine_root",
     "get_save_dir",

voicevox_engine/utility/core_version.py

@@ -0,0 +1,15 @@
+from typing import Iterable
+
+from packaging.version import Version
+from packaging.version import parse as parse_version
+
+
+def parse_core_version(version: str) -> Version:
+    return parse_version(version)
+
+
+def get_latest_core_version(versions: Iterable[str]) -> str:
+    if len(versions) == 0:
+        raise Exception("versions must be non-empty.")
+
+    return str(max(map(parse_core_version, versions)))