/*
 * Copyright 2000-2018 JetBrains s.r.o.
 *
 * 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 jetbrains.buildServer.buildTriggers.vcs.mercurial;

import jetbrains.buildServer.serverSide.TeamCityProperties;

/**
 * Created 27.01.14 17:21
 *
 * @author Eugene Petrenko (eugene.petrenko@jetbrains.com)
 */
public class OS {
  private static final int COMMAND_LINE_LIMIT = _COMMAND_LINE_LIMIT();

  private static int _COMMAND_LINE_LIMIT() {
    final String OS_NAME = System.getProperty("os.name").toLowerCase();
    ///http://partmaps.org/era/unix/arg-max.html
    if (!OS_NAME.contains("windows")) return 128 * 1024 - 1; //128kb

    //http://support.microsoft.com/kb/830473/en-us
    if (OS_NAME.matches("windows\\s+(2000|xp|nt)")) {
      return 2047;
    }

    return 8191;
  }

  public static int getMaxCommandLineSize() {
    return TeamCityProperties.getInteger("teamcity.mercurial.maxCommandLineSize", COMMAND_LINE_LIMIT);
  }
}