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package org.multimc;/*
* Copyright 2012-2021 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.
*/
import org.multimc.onesix.OneSixLauncher;
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 class EntryPoint
{
private static final Logger LOGGER = Logger.getLogger("EntryPoint");
private final ParamBucket params = new ParamBucket();
private org.multimc.Launcher launcher;
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;
}
case "launcher": {
if (tokens.length != 2)
throw new ParseException("Expected 2 tokens, got " + tokens.length);
if (tokens[1].equals("onesix")) {
launcher = new OneSixLauncher();
LOGGER.info("Using onesix launcher.");
return Action.Proceed;
} else {
throw new ParseException("Invalid launcher type: " + tokens[1]);
}
}
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;
}
if (launcher != null)
{
return launcher.launch(params);
}
LOGGER.log(Level.SEVERE, "No valid launcher implementation specified.");
return 1;
}
private enum Action {
Proceed,
Launch,
Abort
}
}
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