/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation and others. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.releng;

import java.io.File;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;

/*
 * A class that strips version numbers off built plugin directory names. This is
 * helpful when prebuilt plugins are used in generating javadoc (on the
 * classpath).
 */

public class VersionNumberStripper extends Task {

    public static void main(final String[] args) {
        new VersionNumberStripper().execute();
    }

    // the directory containing the directories and files from which to remove
    // version information
    private String directory="/home/davidw/temp/4.4/R-4.4-201406061215/features";

    public VersionNumberStripper() {
        super();
    }

    @Override
    public void execute() throws BuildException {
        setDirectory(directory);
        stripVersions();
    }

    public String getDirectory() {
        return directory;
    }

    public void setDirectory(final String dir) {
        directory = dir;
    }

    private void stripVersions() {
        /*
         * rename directories by removing anything from an underscore onward,
         * assuming that anything following the first occurence of an underscore
         * is a version number
         */

        final File file = new File(directory);

        final File[] files = file.listFiles();

        for (int i = 0; i < files.length; i++) {
            final String absolutePath = files[i].getAbsolutePath();
            final String path = absolutePath.substring(0, absolutePath.length() - files[i].getName().length());

            final int underScorePos = files[i].getName().indexOf("_");
            final int jarExtPos = files[i].getName().indexOf(".jar");
            if (underScorePos != -1) {
                String targetPath;
                if (jarExtPos != -1) {
                    targetPath = path + files[i].getName().substring(0, underScorePos) + ".jar";
                } else {
                    targetPath = path + files[i].getName().substring(0, underScorePos);
                }
                files[i].renameTo(new File(targetPath));
            }

        }
    }
}