com.soebes.maven.extensions.incremental.ModuleCalculator Maven / Gradle / Ivy

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package com.soebes.maven.extensions.incremental;

/*
 * 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.
 */

import java.io.File;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

import org.apache.maven.project.MavenProject;
import org.apache.maven.scm.ScmFile;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Karl Heinz Marbaise 
 */
public class ModuleCalculator
{
    private final Logger logger = LoggerFactory.getLogger( getClass().getName() );

    private List projectList;

    private List changeList;

    /**
     * @param projectList The list of Maven Projects which are in the reactor.
     * @param changeList The list of changes within this structure.
     */
    public ModuleCalculator( List projectList, List changeList )
    {
        this.projectList = Objects.requireNonNull( projectList, "projectList is not allowed to be null." );
        this.changeList = Objects.requireNonNull( changeList, "changeList is not allowed to be null." );
    }

    /**
     * Calculate the modules which needed to be rebuilt based on the list of changes from SCM.
     * 
     * @param projectRootpath Root path of the project.
     * @return The list of modules which needed to be rebuilt.
     */
    public List calculateChangedModules( Path projectRootpath )
    {
        // TODO: Think about if we got only pom packaging modules? Do we
        // need to do something special there?
        List result = new ArrayList<>();
        for ( MavenProject project : projectList )
        {
            Path relativize = projectRootpath.relativize( project.getBasedir().toPath() );
            for ( ScmFile fileItem : changeList )
            {
                boolean startsWith = new File( fileItem.getPath() ).toPath().startsWith( relativize );
                logger.debug( "startswith: " + startsWith + " " + fileItem.getPath() + " " + relativize );
                if ( startsWith )
                {
                    if ( !result.contains( project ) )
                    {
                        result.add( project );
                    }
                }
            }
        }
        return result;
    }

}