/**
 * Copyright 1&1 Internet AG, https://github.com/1and1/
 *
 * 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 net.oneandone.stool.scm;

import net.oneandone.stool.stage.Stage;
import net.oneandone.stool.util.Credentials;
import net.oneandone.sushi.fs.file.FileNode;
import net.oneandone.sushi.launcher.Failure;

import java.io.IOException;
import java.io.Writer;

public abstract class Scm {
    public static String checkoutUrl(FileNode dir) throws IOException {
        String result;

        result = checkoutUrlOpt(dir);
        if (result == null) {
            throw new IOException("not a checkout: " + dir);
        }
        return result;
    }

    /** Caution, does not work for nested directories */
    public static String checkoutUrlOpt(FileNode dir) throws Failure {
        String result;

        result = Subversion.svnCheckoutUrlOpt(dir);
        if (result != null) {
            return result;
        }
        result = Git.gitCheckoutUrlOpt(dir);
        if (result != null) {
            return result;
        }
        return null;
    }

    private final String refresh;

    public Scm(String refresh) {
        this.refresh = refresh;
    }

    public abstract void checkout(String url, FileNode dir, Writer dest) throws Failure;
    public abstract boolean isCommitted(Stage stage) throws IOException;

    public static Scm forUrl(String url, Credentials svnCredentials) throws IOException {
        Scm scm;

        scm = forUrlOpt(url, svnCredentials);
        if (scm == null) {
            throw new IOException("unknown scm: " + url);
        }
        return scm;
    }

    public static Scm forUrlOpt(String url, Credentials svnCredentials) {
        if (url.startsWith("svn:")) {
            return new Subversion(svnCredentials);
        } else if (url.startsWith("git:")) {
            return new Git();
        } else {
            return null;
        }
    }

    public String refresh() {
        return refresh;
    }
}


@@ -2082,17 +2082,84 @@
  scm
-: %22 + url
+ in url '%22 + url + %22'. Start your url with 'svn:', 'git:', 'gav:' or 'file:%22
 );%0A 

improve error message if scm is unknown