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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "qqmllanguageserver.h"
#include <QtCore/qdebug.h>
#include <QtCore/qfile.h>
#include <QtCore/qdir.h>
#include <QtCore/qfileinfo.h>
#include <QtCore/qcoreapplication.h>
#include "../shared/qqmltoolingsettings.h"
#include <QtCore/qdiriterator.h>
#include <QtCore/qjsonobject.h>
#include <QtCore/qjsonarray.h>
#include <QtCore/qjsondocument.h>
#include <QtCore/qmutex.h>
#include <QtCore/QMutexLocker>
#include <QtCore/qscopedpointer.h>
#include <QtCore/qrunnable.h>
#include <QtCore/qthreadpool.h>
#include <QtCore/qtimer.h>
#include <QtJsonRpc/private/qhttpmessagestreamparser_p.h>
#include <QtQmlCompiler/private/qqmljsresourcefilemapper_p.h>
#include <QtQmlCompiler/private/qqmljscompiler_p.h>
#include <QtQmlCompiler/private/qqmljslogger_p.h>
#include <QtQmlCompiler/private/qqmljsscope_p.h>
#include <QtQmlCompiler/private/qqmljsimporter_p.h>
#if QT_CONFIG(commandlineparser)
# include <QtCore/qcommandlineparser.h>
#endif
#ifndef QT_BOOTSTRAPPED
# include <QtCore/qlibraryinfo.h>
#endif
#include <iostream>
#ifdef Q_OS_WIN32
# include <fcntl.h>
# include <io.h>
#endif
using namespace QmlLsp;
QFile *logFile = nullptr;
QBasicMutex *logFileLock = nullptr;
class StdinReader : public QObject
{
Q_OBJECT
public:
void run()
{
auto guard = qScopeGuard([this]() { emit eof(); });
const constexpr qsizetype bufSize = 1024;
qsizetype bytesInBuf = 0;
char bufferData[2 * bufSize];
char *buffer = static_cast<char *>(bufferData);
auto trySend = [this, &bytesInBuf, buffer]() {
if (bytesInBuf == 0)
return;
qsizetype toSend = bytesInBuf;
bytesInBuf = 0;
QByteArray dataToSend(buffer, toSend);
emit receivedData(dataToSend);
};
QHttpMessageStreamParser streamParser(
[](const QByteArray &, const QByteArray &) { /* just a header, do nothing */ },
[&trySend](const QByteArray &) {
// message body
trySend();
},
[&trySend](QtMsgType, QString) {
// there was an error
trySend();
},
QHttpMessageStreamParser::UNBUFFERED);
while (std::cin.get(buffer[bytesInBuf])) { // should poll/select and process events
qsizetype readNow = std::cin.readsome(buffer + bytesInBuf + 1, bufSize) + 1;
QByteArray toAdd(buffer + bytesInBuf, readNow);
bytesInBuf += readNow;
if (bytesInBuf >= bufSize)
trySend();
streamParser.receiveData(toAdd);
}
trySend();
}
signals:
void receivedData(const QByteArray &data);
void eof();
};
// To debug:
//
// * simple logging can be redirected to a file
// passing -l <file> to the qmlls command
//
// * more complex debugging can use named pipes:
//
// mkfifo qmllsIn
// mkfifo qmllsOut
//
// this together with a qmllsEcho script that can be defined as
//
// #!/bin/sh
// cat -u < ~/qmllsOut &
// cat -u > ~/qmllsIn
//
// allows to use qmllsEcho as lsp server, and still easily start
// it in a terminal
//
// qmlls < ~/qmllsIn > ~/qmllsOut
//
// * statup can be slowed down to have the time to attach via the
// -w <nSeconds> flag.
int main(int argv, char *argc[])
{
#ifdef Q_OS_WIN32
// windows does not open stdin/stdout in binary mode by default
int err = _setmode(_fileno(stdout), _O_BINARY);
if (err == -1)
perror("Cannot set mode for stdout");
err = _setmode(_fileno(stdin), _O_BINARY);
if (err == -1)
perror("Cannot set mode for stdin");
#endif
QHashSeed::setDeterministicGlobalSeed();
QCoreApplication app(argv, argc);
QCoreApplication::setApplicationName("qmlls");
QCoreApplication::setApplicationVersion(QT_VERSION_STR);
#if QT_CONFIG(commandlineparser)
QCommandLineParser parser;
QQmlToolingSettings settings(QLatin1String("qmlls"));
parser.setApplicationDescription(QLatin1String(R"(QML languageserver)"));
parser.addHelpOption();
QCommandLineOption waitOption(QStringList() << "w"
<< "wait",
QLatin1String("Waits the given number of seconds before startup"),
QLatin1String("waitSeconds"));
parser.addOption(waitOption);
QCommandLineOption verboseOption(
QStringList() << "v"
<< "verbose",
QLatin1String("Outputs extra information on the operations being performed"));
parser.addOption(verboseOption);
QCommandLineOption logFileOption(QStringList() << "l"
<< "log-file",
QLatin1String("Writes logging to the given file"),
QLatin1String("logFile"));
parser.addOption(logFileOption);
QString buildDir = QStringLiteral(u"buildDir");
QCommandLineOption buildDirOption(
QStringList() << "b"
<< "build-dir",
QLatin1String("Adds a build dir to look up for qml information"), buildDir);
parser.addOption(buildDirOption);
settings.addOption(buildDir);
QCommandLineOption writeDefaultsOption(
QStringList() << "write-defaults",
QLatin1String("Writes defaults settings to .qmlls.ini and exits (Warning: This "
"will overwrite any existing settings and comments!)"));
parser.addOption(writeDefaultsOption);
QCommandLineOption ignoreSettings(QStringList() << "ignore-settings",
QLatin1String("Ignores all settings files and only takes "
"command line options into consideration"));
parser.addOption(ignoreSettings);
parser.process(app);
if (parser.isSet(writeDefaultsOption)) {
return settings.writeDefaults() ? 0 : 1;
}
if (parser.isSet(logFileOption)) {
QString fileName = parser.value(logFileOption);
qInfo() << "will log to" << fileName;
logFile = new QFile(fileName);
logFileLock = new QMutex;
logFile->open(QFile::WriteOnly | QFile::Truncate | QFile::Text);
qInstallMessageHandler([](QtMsgType t, const QMessageLogContext &, const QString &msg) {
QMutexLocker l(logFileLock);
logFile->write(QString::number(int(t)).toUtf8());
logFile->write(" ");
logFile->write(msg.toUtf8());
logFile->write("\n");
logFile->flush();
});
}
if (parser.isSet(verboseOption))
QLoggingCategory::setFilterRules("qt.languageserver*.debug=true\n");
if (parser.isSet(waitOption)) {
int waitSeconds = parser.value(waitOption).toInt();
if (waitSeconds > 0)
qDebug() << "waiting";
QThread::sleep(waitSeconds);
qDebug() << "starting";
}
#endif
QMutex writeMutex;
QQmlLanguageServer qmlServer(
[&writeMutex](const QByteArray &data) {
QMutexLocker l(&writeMutex);
std::cout.write(data.constData(), data.size());
std::cout.flush();
},
(parser.isSet(ignoreSettings) ? nullptr : &settings));
if (parser.isSet(buildDirOption))
qmlServer.codeModel()->setBuildPathsForRootUrl(QByteArray(), parser.values(buildDirOption));
StdinReader r;
QObject::connect(&r, &StdinReader::receivedData,
qmlServer.server(), &QLanguageServer::receiveData);
QObject::connect(&r, &StdinReader::eof, &app, [&app]() {
QTimer::singleShot(100, &app, []() {
QCoreApplication::processEvents();
QCoreApplication::exit();
});
});
QThreadPool::globalInstance()->start([&r]() { r.run(); });
app.exec();
return qmlServer.returnValue();
}
#include "qmllanguageservertool.moc"
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