ios: handle empty ci keychain list

.gitea/workflows/testflight-release.yml

@@ -140,7 +140,11 @@ jobs:
             -T /usr/bin/xcodebuild \
             -T "${developer_dir}/usr/bin/xcodebuild"
           security set-key-partition-list -S apple-tool:,apple:,codesign: -s -k "${keychain_password}" "${keychain_path}"
-          security list-keychains -d user -s "${keychain_path}" "${base_keychains[@]}"
+          if [[ "${#base_keychains[@]}" -gt 0 ]]; then
+            security list-keychains -d user -s "${keychain_path}" "${base_keychains[@]}"
+          else
+            security list-keychains -d user -s "${keychain_path}"
+          fi
           security default-keychain -d user -s "${keychain_path}"
           security find-identity -v -p codesigning "${keychain_path}"
           security find-identity -v -p codesigning