AbstractThirdPartyReportMojo.java

package org.codehaus.mojo.license;

/*
 * #%L
 * License Maven Plugin
 * %%
 * Copyright (C) 2012 CodeLutin, Codehaus, Tony Chemit
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-3.0.html>.
 * #L%
 */

import org.apache.commons.collections.CollectionUtils;
import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.apache.maven.doxia.siterenderer.Renderer;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugins.annotations.Component;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectBuildingException;
import org.apache.maven.project.artifact.InvalidDependencyVersionException;
import org.apache.maven.reporting.AbstractMavenReport;
import org.apache.maven.reporting.MavenReportException;
import org.codehaus.mojo.license.api.ArtifactFilters;
import org.codehaus.mojo.license.api.DefaultThirdPartyDetails;
import org.codehaus.mojo.license.api.DefaultThirdPartyHelper;
import org.codehaus.mojo.license.api.DependenciesTool;
import org.codehaus.mojo.license.api.DependenciesToolException;
import org.codehaus.mojo.license.api.MavenProjectDependenciesConfigurator;
import org.codehaus.mojo.license.api.ThirdPartyDetails;
import org.codehaus.mojo.license.api.ThirdPartyHelper;
import org.codehaus.mojo.license.api.ThirdPartyTool;
import org.codehaus.mojo.license.api.ThirdPartyToolException;
import org.codehaus.mojo.license.model.LicenseMap;
import org.codehaus.mojo.license.utils.MojoHelper;
import org.codehaus.mojo.license.utils.UrlRequester;
import org.codehaus.plexus.i18n.I18N;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.SortedSet;
import java.util.TreeSet;
import org.codehaus.mojo.license.api.ResolvedProjectDependencies;

/**
 * Base class for third-party reports.
 *
 * @author tchemit dev@tchemit.fr
 * @since 1.1
 */
public abstract class AbstractThirdPartyReportMojo extends AbstractMavenReport
    implements MavenProjectDependenciesConfigurator
{
    private static final Logger LOG = LoggerFactory.getLogger( AbstractThirdPartyReportMojo.class );

    // ----------------------------------------------------------------------
    // Mojo Parameters
    // ----------------------------------------------------------------------

    /**
     * A filter to exclude some scopes.
     *
     * @since 1.1
     */
    @Parameter( property = "license.excludedScopes", defaultValue = "system" )
    private String excludedScopes;

    /**
     * A filter to include only some scopes, if let empty then all scopes will be used (no filter).
     *
     * @since 1.1
     */
    @Parameter( property = "license.includedScopes" )
    private String includedScopes;

    /**
     * A filter to exclude some types.
     *
     * @since 1.15
     */
    @Parameter( property = "license.excludedTypes" )
    private String excludedTypes;

    /**
     * A filter to include only some types, if let empty then all types will be used (no filter).
     *
     * @since 1.15
     */
    @Parameter( property = "license.includedTypes" )
    private String includedTypes;

    /**
     * A filter to exclude some GroupIds
     *
     * @since 1.1
     */
    @Parameter( property = "license.excludedGroups" )
    private String excludedGroups;

    /**
     * A filter to include only some GroupIds
     *
     * @since 1.1
     */
    @Parameter( property = "license.includedGroups" )
    private String includedGroups;

    /**
     * A filter to exclude some ArtifactsIds
     *
     * @since 1.1
     */
    @Parameter( property = "license.excludedArtifacts" )
    private String excludedArtifacts;

    /**
     * A filter to include only some ArtifactsIds
     *
     * @since 1.1
     */
    @Parameter( property = "license.includedArtifacts" )
    private String includedArtifacts;

    /**
     * Include transitive dependencies when looking for missing licenses and downloading license files.
     *
     * @since 1.1
     */
    @Parameter( property = "license.includeTransitiveDependencies", defaultValue = "true" )
    private boolean includeTransitiveDependencies;

    /**
     * A filter to exclude transitive dependencies from excluded artifacts.
     *
     * @since 1.13
     */
    @Parameter( property = "license.excludeTransitiveDependencies", defaultValue = "false" )
    private boolean excludeTransitiveDependencies;

    /**
     * If {@code true} both optional and non-optional dependencies will be included in the list of artifacts for
     * creating the license report; otherwise only non-optional dependencies will be considered.
     *
     * @since 1.19
     */
    @Parameter( property = "license.includeOptional", defaultValue = "true" )
    boolean includeOptional;

    /**
     * A flag to use the missing licenses file to consolidate the THID-PARTY file.
     *
     * @since 1.1
     */
    @Parameter( property = "license.useMissingFile", defaultValue = "false" )
    private boolean useMissingFile;

    /**
     * The file where to fill the license for dependencies with unknwon license.
     *
     * @since 1.1
     */
    @Parameter( property = "license.missingFile", defaultValue = "src/license/THIRD-PARTY.properties" )
    private File missingFile;

    /**
     * The Url that holds the missing license dependency entries. This is an extension to {@link #missingFile}.
     * If set then the entries that will be found at this URL will be added additionally to the entries of the
     * missing file.<br>
     * <br>
     * <b>NOTE:</b><br>
     * the response of the URL endpoint must return content that matches the THIRD-PARTY.properties file!
     *
     * @since 1.15
     */
    @Parameter( property = "license.missingFileUrl" )
    String missingFileUrl;

    /**
     * A file containing the override license information for dependencies.
     * <b>Note:</b> Specify either {@link #overrideUrl} (preferred) or {@link #overrideFile}.
     * If none of these is specified, then {@value LicenseMojoUtils#DEFAULT_OVERRIDE_THIRD_PARTY} resolved against
     * <code>${basedir}</code> will be used if it exists.
     *
     * @since 1.11
     * @deprecated Use {@link #overrideUrl} instead
     */
    @Deprecated
    @Parameter( property = "license.overrideFile" )
    private File overrideFile;

    /**
     * A URL pointing at a property file with the override license information for dependencies.
     * <b>Note:</b> Specify either {@link #overrideUrl} (preferred) or {@link #overrideFile}.
     * If none of these is specified, then {@value LicenseMojoUtils#DEFAULT_OVERRIDE_THIRD_PARTY} resolved against
     * <code>${basedir}</code> will be used if it exists.
     * <p>
     * An example of the file content:
     * <pre>
     * org.jboss.xnio--xnio-api--3.3.6.Final=The Apache Software License, Version 2.0
     * </pre>
     *
     * @since 1.17
     */
    @Parameter( property = "license.overrideUrl" )
    private String overrideUrl;

    /**
     * A {@link URL} prepared either our of {@link #overrideFile} or {@link #overrideUrl} or the default value.
     *
     * @see LicenseMojoUtils#prepareThirdPartyOverrideUrl(URL, File, String, File)
     */
    String resolvedOverrideUrl;

    /**
     * Load from repositories third party missing files.
     *
     * @since 1.0
     */
    @Parameter( property = "license.useRepositoryMissingFiles", defaultValue = "true" )
    private boolean useRepositoryMissingFiles;

    /**
     * To merge licenses in final file.
     * <p>
     * Each entry represents a merge (first license is main license to keep), licenses are separated by {@code |}.
     * <p>
     * Example :
     * <p>
     * <pre>
     * &lt;licenseMerges&gt;
     * &lt;licenseMerge&gt;The Apache Software License|Version 2.0,Apache License, Version 2.0&lt;/licenseMerge&gt;
     * &lt;/licenseMerges&gt;
     * &lt;/pre&gt;
     *
     * <b>Note:</b> This option will be overridden by {@link #licenseMergesUrl} if it is used by command line.
     * @since 1.0
     */
    @Parameter
    private List<String> licenseMerges;

    /**
      * Location of file with the merge licenses in order to be used by command line.
      * <b>Note:</b> This option overrides {@link #licenseMerges}.
      *
      * @since 1.18
      */
     @Parameter( property = "license.licenseMergesUrl" )
     protected String licenseMergesUrl;

    /**
     * The output directory for the report. Note that this parameter is only evaluated if the goal is run directly from
     * the command line. If the goal is run indirectly as part of a site generation, the output directory configured in
     * the Maven Site Plugin is used instead.
     *
     * @since 1.1
     */
    @Parameter( defaultValue = "${project.reporting.outputDirectory}", required = true )
    private File outputDirectory;

    /**
     * Flag to activate verbose mode.
     * <p>
     * <b>Note:</b> Verbose mode is always on if you starts a debug maven instance
     * (says via {@code -X}).
     *
     * @since 1.0
     */
    @Parameter( property = "license.verbose", defaultValue = "${maven.verbose}" )
    private boolean verbose;

    /**
     * Encoding used to read and writes files.
     * <p>
     * <b>Note:</b> If nothing is filled here, we will use the system
     * property {@code file.encoding}.
     *
     * @since 1.0
     */
    @Parameter( property = "license.encoding", defaultValue = "${project.build.sourceEncoding}" )
    private String encoding;

    /**
     * The Maven Project.
     *
     * @since 1.1
     */
    @Parameter( defaultValue = "${project}", readonly = true )
    private MavenProject project;

    // ----------------------------------------------------------------------
    // Plexus Components
    // ----------------------------------------------------------------------

    /**
     * Doxia Site Renderer component.
     *
     * @since 1.1
     */
    @Component
    private Renderer siteRenderer;

    /**
     * Internationalization component.
     *
     * @since 1.1
     */
    @Component
    private I18N i18n;

    /**
     * dependencies tool.
     *
     * @since 1.1
     */
    @Component
    private DependenciesTool dependenciesTool;

    /**
     * third party tool.
     *
     * @since 1.1
     */
    @Component
    private ThirdPartyTool thirdPartyTool;

    /**
     * A URL returning a plain text file that contains include/exclude artifact filters in the following format:
     * <pre>
     * {@code
     * # this is a comment
     * include gaPattern org\.my-org:my-artifact
     * include gaPattern org\.other-org:other-artifact
     * exclude gaPattern org\.yet-anther-org:.*
     * include scope compile
     * include scope test
     * exclude scope system
     * include type jar
     * exclude type war
     * }</pre>
     *
     * @since 1.18
     */
    @Parameter( property = "license.artifactFiltersUrl" )
    private String artifactFiltersUrl;

    private ArtifactFilters artifactFilters;

    // ----------------------------------------------------------------------
    // Protected Abstract Methods
    // ----------------------------------------------------------------------

    protected abstract Collection<ThirdPartyDetails> createThirdPartyDetails()
      throws IOException, ThirdPartyToolException, ProjectBuildingException, MojoFailureException,
             InvalidDependencyVersionException, ArtifactNotFoundException, ArtifactResolutionException,
             DependenciesToolException, MojoExecutionException;

    // ----------------------------------------------------------------------
    // AbstractMavenReport Implementation
    // ----------------------------------------------------------------------

    /**
     * Method to initialize the mojo before doing any concrete actions.
     *
     * <b>Note:</b> The method is invoked before the {@link #executeReport()} method.
     * @throws IOException
     */
    protected void init()
            throws IOException
    {
        if ( licenseMergesUrl != null )
        {
            LOG.warn( "" );
            LOG.warn( "licenseMerges will be overridden by licenseMergesUrl." );
            LOG.warn( "" );
            if ( UrlRequester.isStringUrl( licenseMergesUrl ) )
            {
                licenseMerges = Arrays.asList( UrlRequester.getFromUrl( licenseMergesUrl ).split( "[\n\r]+" ) );
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    protected void executeReport( Locale locale )
            throws MavenReportException
    {
        resolvedOverrideUrl = LicenseMojoUtils.prepareThirdPartyOverrideUrl( resolvedOverrideUrl, overrideFile,
                overrideUrl, project.getBasedir() );

        Collection<ThirdPartyDetails> details;

        try
        {
            init();
            details = createThirdPartyDetails();
        }
        catch ( IOException e )
        {
            throw new MavenReportException( e.getMessage(), e );
        }
        catch ( ThirdPartyToolException e )
        {
            throw new MavenReportException( e.getMessage(), e );
        }
        catch ( ProjectBuildingException e )
        {
            throw new MavenReportException( e.getMessage(), e );
        }
        catch ( ArtifactNotFoundException e )
        {
            throw new MavenReportException( e.getMessage(), e );
        }
        catch ( ArtifactResolutionException e )
        {
            throw new MavenReportException( e.getMessage(), e );
        }
        catch ( MojoFailureException e )
        {
            throw new MavenReportException( e.getMessage(), e );
        }
        catch ( DependenciesToolException e )
        {
            throw new MavenReportException( e.getMessage(), e );
        }
        catch ( MojoExecutionException e )
        {
            throw new MavenReportException( e.getMessage(), e );
        }

        ThirdPartyReportRenderer renderer =
                new ThirdPartyReportRenderer( getSink(), i18n, getOutputName(), locale, details );
        renderer.render();

    }

    /**
     * {@inheritDoc}
     */
    protected MavenProject getProject()
    {
        return project;
    }

    /**
     * {@inheritDoc}
     */
    protected String getOutputDirectory()
    {
        if ( !outputDirectory.isAbsolute() )
        {
            outputDirectory = new File( project.getBasedir(), outputDirectory.getPath() );
        }

        return outputDirectory.getAbsolutePath();
    }

    /**
     * {@inheritDoc}
     */
    protected Renderer getSiteRenderer()
    {
        return siteRenderer;
    }

    /**
     * {@inheritDoc}
     */
    public String getDescription( Locale locale )
    {
        return i18n.getString( getOutputName(), locale, "report.description" );
    }

    /**
     * {@inheritDoc}
     */
    public String getName( Locale locale )
    {
        return i18n.getString( getOutputName(), locale, "report.title" );
    }

    // ----------------------------------------------------------------------
    // MavenProjectDependenciesConfigurator Implementation
    // ----------------------------------------------------------------------

    /**
     * {@inheritDoc}
     */
    public boolean isIncludeTransitiveDependencies()
    {
        return includeTransitiveDependencies;
    }

    /**
     * {@inheritDoc}
     */
    public boolean isExcludeTransitiveDependencies()
    {
        return excludeTransitiveDependencies;
    }

    /** {@inheritDoc} */
    public ArtifactFilters getArtifactFilters()
    {
        if ( artifactFilters == null )
        {
            artifactFilters = ArtifactFilters.of( includedGroups, excludedGroups, includedArtifacts, excludedArtifacts,
                                                  includedScopes, excludedScopes, includedTypes, excludedTypes,
                                                  includeOptional, artifactFiltersUrl , getEncoding() );
        }
        return artifactFilters;
    }

    /**
     * {@inheritDoc}
     */
    public boolean isVerbose()
    {
        return verbose;
    }

    // ----------------------------------------------------------------------
    // Protected Methods
    // ----------------------------------------------------------------------

    Collection<ThirdPartyDetails> createThirdPartyDetails( MavenProject project, boolean loadArtifacts )
      throws IOException, ThirdPartyToolException, ProjectBuildingException, MojoFailureException,
             DependenciesToolException, MojoExecutionException
    {

        ResolvedProjectDependencies loadedDependencies;
        if ( loadArtifacts )
        {
            loadedDependencies =
                    new ResolvedProjectDependencies( project.getArtifacts(), project.getDependencyArtifacts() );
        }
        else
        {
            loadedDependencies = new ResolvedProjectDependencies( getProject().getArtifacts(),
                    getProject().getDependencyArtifacts() );
        }

        ThirdPartyHelper thirdPartyHelper =
                new DefaultThirdPartyHelper( project, encoding, verbose,
                        dependenciesTool, thirdPartyTool,
                        project.getRemoteArtifactRepositories(), project.getRemoteProjectRepositories() );
        // load dependencies of the project
        SortedMap<String, MavenProject> projectDependencies = thirdPartyHelper.loadDependencies( this,
                loadedDependencies );

        // create licenseMap from it
        LicenseMap licenseMap = thirdPartyHelper.createLicenseMap( projectDependencies );

        // Get unsafe dependencies (dependencies with no license in pom)
        SortedSet<MavenProject> dependenciesWithNoLicense = thirdPartyHelper.getProjectsWithNoLicense( licenseMap );

        // compute safe dependencies (with pom licenses)
        Set<MavenProject> dependenciesWithPomLicense =
                new TreeSet<>( MojoHelper.newMavenProjectComparator() );
        dependenciesWithPomLicense.addAll( projectDependencies.values() );

        if ( CollectionUtils.isNotEmpty( dependenciesWithNoLicense ) )
        {
            // there is some unsafe dependencies, remove them from safe dependencies
            dependenciesWithPomLicense.removeAll( dependenciesWithNoLicense );

            if ( useMissingFile )
            {
                // Resolve unsafe dependencies using missing files, this will update licenseMap and unsafeDependencies
                thirdPartyHelper.createUnsafeMapping( licenseMap, missingFile, missingFileUrl,
                        useRepositoryMissingFiles, dependenciesWithNoLicense,
                        projectDependencies, loadedDependencies.getAllDependencies() );
            }
        }

        // LicenseMap is now complete, let's merge licenses if necessary
        thirdPartyHelper.mergeLicenses( licenseMerges, licenseMap );

        // Add override licenses
        thirdPartyTool.overrideLicenses( licenseMap, projectDependencies, encoding, resolvedOverrideUrl );

        // let's build third party details for each dependencies
        Collection<ThirdPartyDetails> details = new ArrayList<>();

        for ( Map.Entry<MavenProject, String[]> entry : licenseMap.toDependencyMap().entrySet() )
        {
            MavenProject dependency = entry.getKey();
            String[] licenses = entry.getValue();
            ThirdPartyDetails detail = new DefaultThirdPartyDetails( dependency );
            details.add( detail );
            if ( dependenciesWithPomLicense.contains( dependency ) )
            {

                // this is a pom licenses
                detail.setPomLicenses( licenses );
            }
            else if ( !dependenciesWithNoLicense.contains( dependency ) )
            {

                // this is a third-party licenses
                detail.setThirdPartyLicenses( licenses );
            }
        }
        return details;
    }

    /** {@inheritDoc} */
    public String getArtifactFiltersUrl()
    {
        return artifactFiltersUrl;
    }

    /** {@inheritDoc} */
    public String getEncoding()
    {
        return encoding;
    }

}