/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.maven.scm.provider.svn;

/**
 * Command utilities for svn commands.
 *
 * @author <a href="mailto:jerome@coffeebreaks.org">Jerome Lacoste</a>
 *
 */
public final class SvnCommandUtils {

    private SvnCommandUtils() {}

    /**
     * Add or overrides the username into a url with a svn+ssh scheme.
     * <p>
     * Svn 1.3.1 doesn't use the username information specified by --username when the url
     * uses the svn+ssh scheme. This allows to fix it. See MRELEASE-35.
     * <p>
     * Convert file url which derived from windows file path to unix path.
     *
     * @param url      the url, not <code>null</code>
     * @param username the username, may be <code>null</code>
     * @return the fixed url
     * @throws NullPointerException if url is <code>null</code>
     */
    public static String fixUrl(String url, String username) {
        if (!(username == null || username.isEmpty()) && url.startsWith("svn+ssh://")) {
            // is there a username to override ? If so we cut after
            int idx = url.indexOf('@');
            int cutIdx = idx < 0 ? "svn+ssh://".length() : idx + 1;
            url = "svn+ssh://" + username + "@" + url.substring(cutIdx);
        } else if (url.startsWith("file://")) {
            // some svn commands does not understand windows path separator in file URL derived from windows file path
            url = url.replace('\\', '/');
        }

        return url;
    }
}