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Command-line tools for interacting with LensKit.

There is a newer version: 3.0-M3

/*
 * LensKit, an open source recommender systems toolkit.
 * Copyright 2010-2014 LensKit Contributors.  See CONTRIBUTORS.md.
 * Work on LensKit has been funded by the National Science Foundation under
 * grants IIS 05-34939, 08-08692, 08-12148, and 10-17697.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 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.
 */
package org.lenskit.cli.commands;

import com.google.auto.service.AutoService;
import net.sourceforge.argparse4j.inf.ArgumentParser;
import net.sourceforge.argparse4j.inf.Namespace;
import org.lenskit.LenskitInfo;
import org.lenskit.cli.Command;

/**
 * @author GroupLens Research
 */
@AutoService(Command.class)
public class Version implements Command {
    @Override
    public String getName() {
        return "version";
    }

    @Override
    public String getHelp() {
        return "show the LensKit version";
    }

    @Override
    public void execute(Namespace opts) throws Exception {
        String version = LenskitInfo.lenskitVersion();
        System.out.format("LensKit version %s%n", version);
        if (version.endsWith("-SNAPSHOT")) {
            System.out.format("Git revision %s%n", LenskitInfo.getHeadRevision());
        }
    }

    public void configureArguments(ArgumentParser parser) {
        parser.description("Prints the LensKit version.");
    }
}