GitRepository.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.guvnor.ala.source.git;

import java.net.URI;
import java.util.HashMap;
import java.util.Map;

import org.guvnor.ala.exceptions.SourcingException;
import org.guvnor.ala.source.Host;
import org.guvnor.ala.source.Repository;
import org.guvnor.ala.source.Source;
import org.guvnor.ala.source.git.model.GitSource;
import org.uberfire.commons.config.ConfigProperties;
import org.uberfire.java.nio.file.FileSystem;
import org.uberfire.java.nio.file.FileSystemAlreadyExistsException;
import org.uberfire.java.nio.file.FileSystems;
import org.uberfire.java.nio.file.Path;

import static org.uberfire.commons.validation.PortablePreconditions.*;

public class GitRepository implements Repository {

    private final Host host;
    private final String id;
    private final String name;
    private final URI uri;
    private final GitCredentials credentials;
    private final String bareRepoDir;
    private final Map<String, String> env = new HashMap<>();
    private FileSystem fileSystem = null;

    public GitRepository( final Host host,
                          final String id,
                          final String name,
                          final URI uri,
                          final GitCredentials credentials,
                          final Map<String, String> env,
                          final ConfigProperties config ) {
        this.host = checkNotNull( "host", host );
        this.id = checkNotEmpty( "id", id );
        this.name = checkNotEmpty( "name", name );
        this.uri = checkNotNull( "uri", uri );
        this.credentials = checkNotNull( "credentials", credentials );
        if ( env != null && !env.isEmpty() ) {
            this.env.putAll( env );
        }
        checkNotNull( "config", config );
        final ConfigProperties.ConfigProperty currentDirectory = config.get( "user.dir", null );
        this.bareRepoDir = config.get( "org.uberfire.provisioning.git.dir", currentDirectory.getValue() ).getValue();
    }

    @Override
    public String getId() {
        return id;
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public Source getSource() {
        return getSource( "master" );
    }

    @Override
    public Source getSource( final String _root,
                             final String... _path ) throws SourcingException {
        if ( fileSystem == null ) {
            final URI fsURI = URI.create( "git://" + name );
            try {
                fileSystem = FileSystems.newFileSystem( fsURI, new HashMap<String, Object>( env ) {
                    {
                        putIfAbsent( "origin", uri.toString() );
                        putIfAbsent( "out-dir", bareRepoDir );
                        if ( credentials.getUser() != null ) {
                            putIfAbsent( "username", credentials.getUser() );
                            putIfAbsent( "password", credentials.getPassw() );
                        }
                    }
                } );
            } catch ( FileSystemAlreadyExistsException fsae ) {
                try {
                    fileSystem = FileSystems.getFileSystem( fsURI );
                } catch ( final Exception ex ) {
                    throw new SourcingException( "Error Getting Source", ex );
                }
            }
        }

        final String root;
        if ( _root == null || _root.isEmpty() ) {
            root = "master";
        } else {
            root = _root;
        }
        final String[] path;
        if ( _path == null || _path.length == 0 ) {
            path = new String[]{ "/" };
        } else {
            path = _path;
        }

        final Path result = fileSystem.getPath( root, path );

        return new GitSource( this, result );
    }
}