mirror of
https://github.com/logos-co/logos-plugin-qt.git
synced 2026-08-27 17:01:11 +00:00
Dario Gabriel LipicarandClaude Opus 5
778b4c5fd2
This repo was the Qt plugin BUILD backend — pure Nix functions plus a CMake
module, with no C++ target at all. But the two things a Qt host actually needs
at runtime lived in logos-qt-sdk, where they are neither a language wrapper over
the protocol C API nor codegen:
LogosAPI / LogosAPIProvider owns a LogosTransportHost per transport,
constructs ModuleProxy / ModuleHandshakeProxy,
publishes the handshake surface, seeds trust
anchors, injects the token validator
LogosProviderBase the base every generated provider derives
PluginInterface the Qt plugin loading contract
the cdylib->Qt glue generator the emitter that wraps a language-neutral
cdylib in a Qt plugin
They move here, so "swap the plugin technology" is a one-repo change.
ADDITIVE: the sources are COPIED and logos-qt-sdk is untouched. Removing them
there now would turn nine downstream masters red at once; that comes later,
after consumers are repointed.
qt_provider_object (and logos_qt_arg_decode, which its QMetaObject dispatch
needs) is carried deliberately even though it is legacy: logos_api_provider
falls back to wrapping a plain QObject in it, and the modules that rely on that
have not been migrated yet. It goes once they are.
The generator links Qt Core and logos-lidl only — never logos-cpp-sdk. It needed
exactly one helper from that SDK's shared frontend, lidlToPascalCase (~12
lines), which is inlined instead, the same way logos-view-module does it. It
also REFUSES `--backend <anything but cdylib>` rather than ignoring the flag:
callers are migrating from a tool where --backend was required and dispatched
on, so silently treating `--backend qt` as cdylib would emit confidently wrong
artifacts with a zero exit.
`rawLib`, `lib` and `cmake-module` deliberately do not reference the new
derivations, so a consumer that only wants the Nix build functions never
realises a Qt/protocol build. Proven, not assumed: with both new inputs
overridden to a bogus flake, cmake-module and rawLib still evaluate while
logos-qt-host fails — so the override bites and the cheap outputs really never
touch it.
Behaviour preservation is the whole claim of a relocation, so it is measured:
the emitted glue is BYTE-IDENTICAL to logos-qt-generator --backend cdylib over
every one of the 20 .lidl contracts in the workspace, in both single and
concurrency:multi mode (40 pairs, exit codes included), and single vs multi do
differ from each other, so both code paths were really exercised. The built
liblogos_qt_host.a is byte-identical to liblogos_qt_sdk.a, exporting the same
390 symbols.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
76 lines
3.2 KiB
C++
76 lines
3.2 KiB
C++
#include "logos_qt_arg_decode.h"
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namespace logos {
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namespace {
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// One case per QMetaType the Qt type mapping can produce for a parameter.
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// Each hands off to the SAME QtArgCodec<T> the generated dispatch uses, so the
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// two provider sites cannot answer differently for the same argument.
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template <class T>
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QtArgVerdict decodeAs(const QVariant& in, const std::string& path, QVariant& out,
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std::string& error)
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{
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try {
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out = QVariant::fromValue(detail::QtArgCodec<T>::from(in, path));
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return QtArgVerdict::Ok;
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} catch (const CodecError& e) {
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error = e.what();
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return QtArgVerdict::Rejected;
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}
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}
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} // namespace
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QtArgVerdict qtArgDecode(const QVariant& in, QMetaType paramType,
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const std::string& path, QVariant& out,
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std::string& error)
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{
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switch (paramType.id()) {
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case QMetaType::Bool: return decodeAs<bool>(in, path, out, error);
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case QMetaType::Int: return decodeAs<int>(in, path, out, error);
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case QMetaType::UInt: return decodeAs<unsigned int>(in, path, out, error);
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case QMetaType::Short: return decodeAs<short>(in, path, out, error);
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case QMetaType::UShort: return decodeAs<unsigned short>(in, path, out, error);
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case QMetaType::Long: return decodeAs<long>(in, path, out, error);
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case QMetaType::ULong: return decodeAs<unsigned long>(in, path, out, error);
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case QMetaType::LongLong: return decodeAs<qlonglong>(in, path, out, error);
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case QMetaType::ULongLong: return decodeAs<qulonglong>(in, path, out, error);
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case QMetaType::Double: return decodeAs<double>(in, path, out, error);
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case QMetaType::Float: return decodeAs<float>(in, path, out, error);
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case QMetaType::QString: return decodeAs<QString>(in, path, out, error);
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case QMetaType::QByteArray: return decodeAs<QByteArray>(in, path, out, error);
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case QMetaType::QStringList: return decodeAs<QStringList>(in, path, out, error);
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case QMetaType::QVariantList: return decodeAs<QVariantList>(in, path, out, error);
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case QMetaType::QVariantMap: return decodeAs<QVariantMap>(in, path, out, error);
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case QMetaType::QJsonArray: return decodeAs<QJsonArray>(in, path, out, error);
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case QMetaType::QJsonObject: return decodeAs<QJsonObject>(in, path, out, error);
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// `any`, QUrl, QChar, enums, pointers, LogosResult, anything a module
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// author invented: no LIDL counterpart, so no rule to check against. The
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// caller keeps whatever it did before — see the header comment.
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default:
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return QtArgVerdict::Unchecked;
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}
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}
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nlohmann::json dispatchFailedJson(const std::string& origin,
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const std::string& message)
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{
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return nlohmann::json{{"code", "dispatch_failed"},
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{"message", message},
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{"origin", origin}};
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}
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QVariant dispatchFailedVariant(const QString& origin, const QString& message)
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{
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QVariantMap m;
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m.insert(QStringLiteral("code"), QStringLiteral("dispatch_failed"));
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m.insert(QStringLiteral("message"), message);
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m.insert(QStringLiteral("origin"), origin);
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return m;
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}
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} // namespace logos
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