fix(deploy): 保留已有覆盖配置并支持重复迁移

scripts/prepare-update-repository.py

@@ -150,6 +150,29 @@ if token_key in old_monitor and token_key not in monitor and token_key in new_mo
     monitor[token_key] = new_monitor[token_key]
 merged = merge(base, local, remote)
 override = delta(remote, merged)
+config_dir = root / 'data/deployment-config'
+override_path = config_dir / 'legacy-compose.json'
+
+def apply_override(original, additional):
+    if isinstance(original, dict) and isinstance(additional, dict):
+        result = copy.deepcopy(original)
+        for key, value in additional.items():
+            result[key] = apply_override(result.get(key, MISSING), value)
+        return result
+    return copy.deepcopy(additional)
+
+# Repeated adoption must preserve already migrated settings. A newly reviewed
+# main-file difference has the same precedence as the old main file; only
+# explicitly restored target images are released back to the repository.
+if override_path.exists():
+    if override_path.is_symlink() or not override_path.is_file():
+        sys.exit('❌ 旧配置覆盖文件类型不受支持；尚未修改配置或容器')
+    previous_override = canonical(json.loads(override_path.read_text()))
+    for service in restore_images:
+        previous_override.get('services', {}).get(service, {}).pop('image', None)
+    override = apply_override(previous_override, {} if override is MISSING else override)
+    merged = apply_override(remote, override)
+
 with tempfile.NamedTemporaryFile(mode='w', dir=root, prefix='.update-compose-', suffix='.json', delete=False) as candidate:
     json.dump(serialize(merged), candidate)
     candidate_path = Path(candidate.name)
@@ -165,7 +188,9 @@ backup_root = root / 'data/deployment-backups'
 backup_root.mkdir(parents=True, exist_ok=True, mode=0o700)
 backup = Path(tempfile.mkdtemp(prefix='legacy-update-' + time.strftime('%Y%m%d-%H%M%S') + '-', dir=backup_root))
 backup.chmod(0o700)
-for name in changed | collisions | {'.env'}:
+backup_files = changed | collisions | {'.env'}
+if override_path.exists(): backup_files.add(str(override_path.relative_to(root)))
+for name in backup_files:
     destination = backup / name
     destination.parent.mkdir(parents=True, exist_ok=True, mode=0o700)
     shutil.copy2(root / name, destination)
@@ -174,8 +199,6 @@ config_dir = root / 'data/deployment-config'
 config_dir.mkdir(parents=True, exist_ok=True, mode=0o700)
 override_path = config_dir / 'legacy-compose.json'
 if override is not MISSING and override:
-    if override_path.exists():
-        sys.exit('❌ 已存在旧配置迁移结果；请检查备份后再重试，尚未修改仓库')
     override_path.write_text(json.dumps(serialize(override), indent=2) + '\n')
     override_path.chmod(0o600)
     env_path = root / '.env'
@@ -192,7 +215,7 @@ for name in collisions:
     (root / name).unlink()
 if changed:
     subprocess.run(['git', 'restore', '--source=HEAD', '--staged', '--worktree', '--', 'docker-compose.yml'], check=True)
-(backup / 'migration.json').write_text(json.dumps({'from': git('rev-parse', 'HEAD').strip(), 'to': git('rev-parse', upstream).strip(), 'preservedFields': preserved, 'restoredRepositoryImages': sorted(restore_images), 'files': sorted(changed | collisions)}, indent=2))
+(backup / 'migration.json').write_text(json.dumps({'from': git('rev-parse', 'HEAD').strip(), 'to': git('rev-parse', upstream).strip(), 'preservedFields': preserved, 'restoredRepositoryImages': sorted(restore_images), 'files': sorted(backup_files)}, indent=2))
 (backup / 'migration.json').chmod(0o600)
 print('✅ 已备份旧配置并迁移本地差异；新版部署字段由仓库继续管理')
 print('   备份目录: ' + str(backup))