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/*
* Copyright (C) 2014 Aaron Seigo <aseigo@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef Q_OS_WIN
#include <io.h>
#else
#include <unistd.h>
#endif
#include <QCoreApplication>
#include <QDebug>
#include <QFile>
#include <QTextStream>
#include "syntaxtree.h"
// #include "jsonlistener.h"
#include "repl/repl.h"
/*
* modes of operation:
*
* 1. called with no commands: start the REPL
* 2. called with -: listen for commands on stdin
* 3. called with a filename: try to run it as a script
* 4. called with commands: try to match to syntax and run the result
*/
int enterRepl()
{
if (State::hasEventLoop()) {
return 0;
}
Repl *repl = new Repl;
QObject::connect(repl, &QStateMachine::finished, repl, &QObject::deleteLater);
QObject::connect(repl, &QStateMachine::finished, QCoreApplication::instance(), &QCoreApplication::quit);
State::setHasEventLoop(true);
int rv = QCoreApplication::instance()->exec();
State::setHasEventLoop(false);
return rv;
}
bool goInteractive(const QStringList &, State &)
{
enterRepl();
return true;
}
Syntax::List goInteractiveSyntax()
{
Syntax interactive("go_interactive", QString(), &goInteractive);
return Syntax::List() << interactive;
}
void processCommandStream(QTextStream &stream)
{
SyntaxTree::self()->registerSyntax(&goInteractiveSyntax);
QString line = stream.readLine();
while (!line.isEmpty()) {
line = line.trimmed();
if (!line.isEmpty() && !line.startsWith('#')) {
SyntaxTree::self()->run(SyntaxTree::tokenize(line));
}
line = stream.readLine();
}
}
int main(int argc, char *argv[])
{
const bool interactive = isatty(fileno(stdin));
const bool startRepl = (argc == 1) && interactive;
// TODO: make a json command parse cause that would be awesomesauce
const bool fromScript = !startRepl && QFile::exists(argv[1]);
// qDebug() << "state at startup is" << interactive << startRepl << fromScript;
QCoreApplication app(argc, argv);
app.setApplicationName(fromScript ? "interactive-app-shell" : argv[0]);
if (startRepl) {
return enterRepl();
} else if (fromScript) {
QFile f(argv[1]);
if (!f.open(QIODevice::ReadOnly)) {
return 1;
}
QTextStream inputStream(&f);
processCommandStream(inputStream);
} else if (!interactive) {
QTextStream inputStream(stdin);
processCommandStream(inputStream);
} else {
QStringList commands = app.arguments();
commands.removeFirst();
return SyntaxTree::self()->run(commands);
}
}
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