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// SPDX-License-Identifier: GPL-3.0-only
/*
* PolyMC - Minecraft Launcher
* Copyright (C) 2022 icelimetea, <fr3shtea@outlook.com>
*
* 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, version 3.
*
* 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, see <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.multimc;
import org.multimc.exception.ParseException;
import org.multimc.utils.Parameters;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.logging.Level;
import java.util.logging.Logger;
public final class EntryPoint {
private static final Logger LOGGER = Logger.getLogger("EntryPoint");
private final Parameters params = new Parameters();
public static void main(String[] args) {
EntryPoint listener = new EntryPoint();
int retCode = listener.listen();
if (retCode != 0) {
LOGGER.info("Exiting with " + retCode);
System.exit(retCode);
}
}
private Action parseLine(String inData) throws ParseException {
String[] tokens = inData.split("\\s+", 2);
if (tokens.length == 0)
throw new ParseException("Unexpected empty string!");
switch (tokens[0]) {
case "launch": {
return Action.Launch;
}
case "abort": {
return Action.Abort;
}
default: {
if (tokens.length != 2)
throw new ParseException("Error while parsing:" + inData);
params.add(tokens[0], tokens[1]);
return Action.Proceed;
}
}
}
public int listen() {
Action action = Action.Proceed;
try (BufferedReader reader = new BufferedReader(new InputStreamReader(
System.in,
StandardCharsets.UTF_8
))) {
String line;
while (action == Action.Proceed) {
if ((line = reader.readLine()) != null) {
action = parseLine(line);
} else {
action = Action.Abort;
}
}
} catch (IOException | ParseException e) {
LOGGER.log(Level.SEVERE, "Launcher ABORT due to exception:", e);
return 1;
}
// Main loop
if (action == Action.Abort) {
LOGGER.info("Launch aborted by the launcher.");
return 1;
}
try {
Launcher launcher =
LauncherFactory
.getInstance()
.createLauncher(params);
launcher.launch();
return 0;
} catch (IllegalArgumentException e) {
LOGGER.log(Level.SEVERE, "Wrong argument.", e);
return 1;
} catch (Exception e) {
LOGGER.log(Level.SEVERE, "Exception caught from launcher.", e);
return 1;
}
}
private enum Action {
Proceed,
Launch,
Abort
}
}
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