com.github.fracpete.wekavirtualenv.command.Reset Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of weka-virtualenv Show documentation
Virtual environment managment for Weka.
The newest version!
/*
 *   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 3 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, see .
 */

/*
 * Reset.java
 * Copyright (C) 2017-2018 University of Waikato, Hamilton, NZ
 */

package com.github.fracpete.wekavirtualenv.command;

import com.github.fracpete.simpleargparse4j.ArgumentParser;
import com.github.fracpete.simpleargparse4j.Namespace;
import com.github.fracpete.wekavirtualenv.env.Environments;
import nz.ac.waikato.cms.core.FileUtils;

import java.io.File;

/**
 * Resets an existing environment, i.e., deletes the "wekafiles" sub-directory.
 *
 * @author FracPete (fracpete at waikato dot ac dot nz)
 */
public class Reset
  extends AbstractCommand {

  /**
   * The name of the command (used on the commandline).
   *
   * @return		the name
   */
  @Override
  public String getName() {
    return "reset";
  }

  /**
   * Returns a short help string.
   *
   * @return		the help string
   */
  public String getHelp() {
    return "Resets an existing environment, i.e., deletes the \"wekafiles\" sub-directory.";
  }

  /**
   * Returns the parser to use for the arguments.
   *
   * @return		always null
   */
  @Override
  public ArgumentParser getParser() {
    ArgumentParser 	result;

    result = new ArgumentParser(getName());
    result.addOption("--name")
      .dest("name")
      .help("the name of the environment to reset")
      .required(true);

    return result;
  }

  /**
   * Executes the command.
   *
   * @param ns		the namespace of the parsed options, null if no options to parse
   * @param options	additional command-line options
   * @return		true if successful
   */
  @Override
  protected boolean doExecute(Namespace ns, String[] options) {
    boolean 	result;

    result = FileUtils.delete(new File(Environments.getWekaFilesDir(ns.getString("name"))));
    if (!result)
      addError("Failed to reset environment '" + ns.getString("name") + "'!");
    else
      println("Environment successfully reset: " + ns.getString("name"), true);

    return result;
  }
}