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FlattenMojo.java
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FlattenMojo.java
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package org.codehaus.mojo.flatten;
/*
* 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 org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.factory.ArtifactFactory;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.model.Activation;
import org.apache.maven.model.Build;
import org.apache.maven.model.Dependency;
import org.apache.maven.model.Exclusion;
import org.apache.maven.model.Model;
import org.apache.maven.model.Plugin;
import org.apache.maven.model.Profile;
import org.apache.maven.model.Repository;
import org.apache.maven.model.RepositoryPolicy;
import org.apache.maven.model.building.DefaultModelBuildingRequest;
import org.apache.maven.model.building.ModelBuildingException;
import org.apache.maven.model.building.ModelBuildingRequest;
import org.apache.maven.model.building.ModelBuildingResult;
import org.apache.maven.model.building.ModelProblemCollector;
import org.apache.maven.model.interpolation.ModelInterpolator;
import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
import org.apache.maven.model.io.xpp3.MavenXpp3Writer;
import org.apache.maven.model.profile.ProfileActivationContext;
import org.apache.maven.model.profile.ProfileInjector;
import org.apache.maven.model.profile.ProfileSelector;
import org.apache.maven.plugin.MojoExecution;
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.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.plugins.annotations.ResolutionScope;
import org.apache.maven.project.DefaultProjectBuildingRequest;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectBuildingRequest;
import org.apache.maven.shared.dependency.graph.DependencyGraphBuilder;
import org.apache.maven.shared.dependency.graph.DependencyGraphBuilderException;
import org.apache.maven.shared.dependency.graph.DependencyNode;
import org.apache.maven.shared.dependency.graph.traversal.DependencyNodeVisitor;
import org.apache.maven.shared.transfer.dependencies.resolve.DependencyResolver;
import org.codehaus.mojo.flatten.cifriendly.CiInterpolator;
import org.codehaus.mojo.flatten.model.resolution.FlattenModelResolver;
import org.codehaus.plexus.util.StringUtils;
import org.codehaus.plexus.util.xml.Xpp3Dom;
import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
import org.eclipse.aether.artifact.DefaultArtifact;
import org.eclipse.aether.impl.ArtifactDescriptorReader;
import org.eclipse.aether.resolution.ArtifactDescriptorException;
import org.eclipse.aether.resolution.ArtifactDescriptorRequest;
import org.eclipse.aether.resolution.ArtifactDescriptorResult;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.ext.DefaultHandler2;
import javax.inject.Inject;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;
import java.util.Queue;
import java.util.Set;
/**
* This MOJO realizes the goal <code>flatten</code> that generates the flattened POM and {@link #isUpdatePomFile()
* potentially updates the POM file} so that the current {@link MavenProject}'s {@link MavenProject#getFile() file}
* points to the flattened POM instead of the original <code>pom.xml</code> file. The flattened POM is a reduced version
* of the original POM with the focus to contain only the important information for consuming it. Therefore information
* that is only required for maintenance by developers and to build the project artifact(s) are stripped. Starting from
* here we specify how the flattened POM is created from the original POM and its project:<br>
* <table>
* <caption></caption>
* <tr>
* <th>Element</th>
* <th>Transformation</th>
* <th>Note</th>
* </tr>
* <tr>
* <td>{@link Model#getModelVersion() modelVersion}</td>
* <td>Fixed to "4.0.0"</td>
* <td>New maven versions will once be able to evolve the model version without incompatibility to older versions if
* flattened POMs get deployed.</td>
* </tr>
* <tr>
* <td>{@link Model#getGroupId() groupId}<br>
* {@link Model#getArtifactId() artifactId}<br>
* {@link Model#getVersion() version}<br>
* {@link Model#getPackaging() packaging}</td>
* <td>resolved</td>
* <td>copied to the flattened POM but with inheritance from {@link Model#getParent() parent} as well as with all
* variables and defaults resolved. These elements are technically required for consumption.</td>
* </tr>
* <tr>
* <td>{@link Model#getLicenses() licenses}</td>
* <td>resolved</td>
* <td>copied to the flattened POM but with inheritance from {@link Model#getParent() parent} as well as with all
* variables and defaults resolved. The licenses would not be required in flattened POM. However, they make sense for
* publication and deployment and are important for consumers of your artifact.</td>
* </tr>
* <tr>
* <td>{@link Model#getDependencies() dependencies}</td>
* <td>resolved specially</td>
* <td>flattened POM contains the actual dependencies of the project. Test dependencies are removed. Variables and
* {@link Model#getDependencyManagement() dependencyManagement} is resolved to get fixed dependency attributes
* (especially {@link Dependency#getVersion() version}). If {@link #isEmbedBuildProfileDependencies()
* embedBuildProfileDependencies} is set to <code>true</code>, then also build-time driven {@link Profile}s will be
* evaluated and may add {@link Dependency dependencies}. For further details see {@link Profile}s below.</td>
* </tr>
* <tr>
* <td>{@link Model#getProfiles() profiles}</td>
* <td>resolved specially</td>
* <td>only the {@link Activation} and the {@link Dependency dependencies} of a {@link Profile} are copied to the
* flattened POM. If you set the parameter {@link #isEmbedBuildProfileDependencies() embedBuildProfileDependencies} to
* <code>true</code> then only profiles {@link Activation activated} by {@link Activation#getJdk() JDK} or
* {@link Activation#getOs() OS} will be added to the flattened POM while the other profiles are triggered by the
* current build setup and if activated their impact on dependencies is embedded into the resulting flattened POM.</td>
* </tr>
* <tr>
* <td>{@link Model#getName() name}<br>
* {@link Model#getDescription() description}<br>
* {@link Model#getUrl() url}<br>
* {@link Model#getInceptionYear() inceptionYear}<br>
* {@link Model#getOrganization() organization}<br>
* {@link Model#getScm() scm}<br>
* {@link Model#getDevelopers() developers}<br>
* {@link Model#getContributors() contributors}<br>
* {@link Model#getMailingLists() mailingLists}<br>
* {@link Model#getPluginRepositories() pluginRepositories}<br>
* {@link Model#getIssueManagement() issueManagement}<br>
* {@link Model#getCiManagement() ciManagement}<br>
* {@link Model#getDistributionManagement() distributionManagement}</td>
* <td>configurable</td>
* <td>Will be stripped from the flattened POM by default. You can configure all of the listed elements inside
* <code>pomElements</code> that should be kept in the flattened POM (e.g. {@literal
* <pomElements><name/><description/><developers/><contributors/></pomElements>}). For common use-cases there are
* predefined modes available via the parameter <code>flattenMode</code> that should be used in preference.</td>
* </tr>
* <tr>
* <td>{@link Model#getPrerequisites() prerequisites}</td>
* <td>configurable</td>
* <td>Like above but by default NOT removed if packaging is "maven-plugin".</td>
* </tr>
* <tr>
* <td>{@link Model#getRepositories() repositories}</td>
* <td>configurable</td>
* <td>Like two above but by default NOT removed. If you want have it removed, you need to use the parameter
* <code>pomElements</code> and configure the child element <code>repositories</code> with value <code>flatten</code>.
* </td>
* </tr>
* <tr>
* <td>{@link Model#getParent() parent}<br>
* {@link Model#getBuild() build}<br>
* {@link Model#getDependencyManagement() dependencyManagement}<br>
* {@link Model#getProperties() properties}<br>
* {@link Model#getModules() modules}<br>
* {@link Model#getReporting() reporting}</td>
* <td>configurable</td>
* <td>These elements should typically be completely stripped from the flattened POM. However for ultimate flexibility
* (e.g. if you only want to resolve variables in a POM with packaging pom) you can also configure to keep these
* elements. We strictly recommend to use this feature with extreme care and only if packaging is pom (for "Bill of
* Materials"). In the latter case you configure the parameter <code>flattenMode</code> to the value
* <code>bom</code>.<br>
* If the <code>build</code> element contains plugins in the <code>build/plugins</code> section which are configured to
* load <a href="http://maven.apache.org/pom.html#Extensions">extensions</a>, a reduced <code>build</code> element
* containing these plugins will be kept in the flattened pom.</td>
* </tr>
* </table>
*
* @author Joerg Hohwiller (hohwille at users.sourceforge.net)
*/
@SuppressWarnings( "deprecation" )
// CHECKSTYLE_OFF: LineLength
@Mojo( name = "flatten", requiresProject = true, requiresDirectInvocation = false, executionStrategy = "once-per-session", requiresDependencyCollection = ResolutionScope.RUNTIME, threadSafe = true )
// CHECKSTYLE_ON: LineLength
public class FlattenMojo
extends AbstractFlattenMojo
{
private static final int INITIAL_POM_WRITER_SIZE = 4096;
/**
* The Maven Project.
*/
@Parameter( defaultValue = "${project}", readonly = true, required = true )
private MavenProject project;
/**
* The flag to indicate if the generated flattened POM shall be set as POM file to the current project. By default
* this is only done for projects with packaging other than <code>pom</code>. You may want to also do this for
* <code>pom</code> packages projects by setting this parameter to <code>true</code> or you can use
* <code>false</code> in order to only generate the flattened POM but never set it as POM file. If
* <code>flattenMode</code> is set to bom the default value will be <code>true</code>.
*/
@Parameter( property = "updatePomFile" )
private Boolean updatePomFile;
/** The {@link ArtifactRepository} required to resolve POM. */
@Parameter( defaultValue = "${localRepository}", readonly = true, required = true )
private ArtifactRepository localRepository;
/**
* Profiles activated by OS or JDK are valid ways to have different dependencies per environment. However, profiles
* activated by property of file are less clear. When setting this parameter to <code>true</code>, the latter
* dependencies will be written as direct dependencies of the project. <strong>This is not how Maven2 and Maven3
* handles dependencies</strong>. When keeping this property <code>false</code>, all profiles will stay in the
* flattened-pom.
*/
@Parameter( defaultValue = "false" )
private Boolean embedBuildProfileDependencies;
/**
* The {@link MojoExecution} used to get access to the raw configuration of {@link #pomElements} as empty tags are
* mapped to null.
*/
@Parameter( defaultValue = "${mojo}", readonly = true, required = true )
private MojoExecution mojoExecution;
/**
* The {@link Model} that defines how to handle additional POM elements. Please use <code>flattenMode</code> in
* preference if possible. This parameter is only for ultimate flexibility.
*/
@Parameter( required = false )
private FlattenDescriptor pomElements;
/**
* Dictates whether dependency exclusions stanzas should be included in the flattened POM. By default exclusions
* will be included in the flattened POM but if you wish to omit exclusions stanzas from being present then set
* this configuration property to <code>true</code>.
*
* @since 1.3.0
*/
@Parameter( defaultValue = "false", required = false )
private boolean omitExclusions;
/**
* The different possible values for flattenMode:
* <table border="1" summary="">
* <thead>
* <tr>
* <td>Mode</td>
* <td>Description</td>
* </tr>
* </thead> <tbody>
* <tr>
* <td>oss</td>
* <td>For Open-Source-Software projects that want to keep all {@link FlattenDescriptor optional POM elements}
* except for {@link Model#getRepositories() repositories} and {@link Model#getPluginRepositories()
* pluginRepositories}.</td>
* <tr>
* <td>ossrh</td>
* <td>Keeps all {@link FlattenDescriptor optional POM elements} that are required for
* <a href="https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide">OSS
* Repository-Hosting</a>.</td>
* </tr>
* <tr>
* <td>bom</td>
* <td>Like <code>ossrh</code> but additionally keeps {@link Model#getDependencyManagement() dependencyManagement} and
* {@link Model#getProperties() properties}. Especially it will keep the {@link Model#getDependencyManagement()
* dependencyManagement} <em>as-is</em> without resolving parent influences and import-scoped dependencies. This is
* useful if your POM represents a <a href=
* "http://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#Importing_Dependencies"
* >BOM (Bill Of Material)</a> and you do not want to deploy it as is (to remove parent and resolve version
* variables, etc.).</td>
* </tr>
* <tr>
* <td>defaults</td>
* <td>The default mode that removes all {@link FlattenDescriptor optional POM elements} except
* {@link Model#getRepositories() repositories}.</td>
* </tr>
* <tr>
* <td>clean</td>
* <td>Removes all {@link FlattenDescriptor optional POM elements}.</td>
* </tr>
* <tr>
* <td>fatjar</td>
* <td>Removes all {@link FlattenDescriptor optional POM elements} and all {@link Model#getDependencies()
* dependencies}.</td>
* </tr>
* <tr>
* <td>resolveCiFriendliesOnly</td>
* <td>Only resolves variables revision, sha1 and changelist. Keeps everything else.
* See <a href="https://maven.apache.org/maven-ci-friendly.html">Maven CI Friendly</a> for further details.</td>
* </tr>
* </tbody>
* </table>
*/
@Parameter( property = "flatten.mode", required = false )
private FlattenMode flattenMode;
/**
* The different possible values for flattenDependencyMode:
* <table border="1" summary="">
* <thead>
* <tr>
* <td>Mode</td>
* <td>Description</td>
* </tr>
* </thead><tbody>
* <tr>
* <td>direct</td>
* <td>Flatten only the direct dependency versions. This is the default mode and compatible with Flatten Plugin prior to 1.2.0.</td>
* <tr>
* <td>all</td>
* <td><p>Flatten both direct and transitive dependencies. This will examine the full dependency tree, and pull up
* all transitive dependencies as a direct dependency, and setting their versions appropriately.</p>
* <p>This is recommended if you are releasing a library that uses dependency management to manage dependency
* versions.</p></td>
* </tr>
* </tbody>
* </table>
*/
@Parameter( property = "flatten.dependency.mode", required = false )
private FlattenDependencyMode flattenDependencyMode;
/**
* The ArtifactFactory required to resolve POM.
*/
// Neither ArtifactFactory nor DefaultArtifactFactory tells what to use instead
@Component
private ArtifactFactory artifactFactory;
/**
* The {@link ModelInterpolator} used to resolve variables.
*/
@Component( role = ModelInterpolator.class )
private ModelInterpolator modelInterpolator;
/**
* The {@link ModelInterpolator} used to resolve variables.
*/
@Component( role = CiInterpolator.class)
private CiInterpolator modelCiFriendlyInterpolator;
/**
* The {@link MavenSession} used to get user properties.
*/
@Parameter( defaultValue = "${session}", readonly = true, required = true )
private MavenSession session;
@Component
private DependencyResolver dependencyResolver;
@Component( hint = "default" )
private DependencyGraphBuilder dependencyGraphBuilder;
@Component(role = ArtifactDescriptorReader.class)
private ArtifactDescriptorReader artifactDescriptorReader;
@Inject
private ModelBuilderThreadSafetyWorkaround modelBuilderThreadSafetyWorkaround;
/**
* The constructor.
*/
public FlattenMojo()
{
super();
}
/**
* {@inheritDoc}
*/
public void execute()
throws MojoExecutionException, MojoFailureException
{
getLog().info( "Generating flattened POM of project " + this.project.getId() + "..." );
File originalPomFile = this.project.getFile();
Model flattenedPom = createFlattenedPom( originalPomFile );
String headerComment = extractHeaderComment( originalPomFile );
File flattenedPomFile = getFlattenedPomFile();
writePom( flattenedPom, flattenedPomFile, headerComment );
if ( isUpdatePomFile() )
{
this.project.setPomFile( flattenedPomFile );
}
}
/**
* This method extracts the XML header comment if available.
*
* @param xmlFile is the XML {@link File} to parse.
* @return the XML comment between the XML header declaration and the root tag or <code>null</code> if NOT
* available.
* @throws MojoExecutionException if anything goes wrong.
*/
protected String extractHeaderComment( File xmlFile )
throws MojoExecutionException
{
try
{
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
SaxHeaderCommentHandler handler = new SaxHeaderCommentHandler();
parser.setProperty( "http://xml.org/sax/properties/lexical-handler", handler );
parser.parse( xmlFile, handler );
return handler.getHeaderComment();
}
catch ( Exception e )
{
throw new MojoExecutionException( "Failed to parse XML from " + xmlFile, e );
}
}
/**
* Writes the given POM {@link Model} to the given {@link File}.
*
* @param pom the {@link Model} of the POM to write.
* @param pomFile the {@link File} where to write the given POM will be written to. {@link File#getParentFile()
* Parent directories} are {@link File#mkdirs() created} automatically.
* @param headerComment is the content of a potential XML comment at the top of the XML (after XML declaration and
* before root tag). May be <code>null</code> if not present and to be omitted in target POM.
* @throws MojoExecutionException if the operation failed (e.g. due to an {@link IOException}).
*/
protected void writePom( Model pom, File pomFile, String headerComment )
throws MojoExecutionException
{
File parentFile = pomFile.getParentFile();
if ( !parentFile.exists() )
{
boolean success = parentFile.mkdirs();
if ( !success )
{
throw new MojoExecutionException( "Failed to create directory " + pomFile.getParent() );
}
}
// MavenXpp3Writer could internally add the comment but does not expose such feature to API!
// Instead we have to write POM XML to String and do post processing on that :(
MavenXpp3Writer pomWriter = new MavenXpp3Writer();
StringWriter stringWriter = new StringWriter( INITIAL_POM_WRITER_SIZE );
try
{
pomWriter.write( stringWriter, pom );
}
catch ( IOException e )
{
throw new MojoExecutionException( "Internal I/O error!", e );
}
StringBuffer buffer = stringWriter.getBuffer();
if ( !StringUtils.isEmpty( headerComment ) )
{
int projectStartIndex = buffer.indexOf( "<project" );
if ( projectStartIndex >= 0 )
{
buffer.insert( projectStartIndex, "<!--" + headerComment + "-->\n" );
}
else
{
getLog().warn( "POM XML post-processing failed: no project tag found!" );
}
}
writeStringToFile( buffer.toString(), pomFile, pom.getModelEncoding() );
}
/**
* Writes the given <code>data</code> to the given <code>file</code> using the specified <code>encoding</code>.
*
* @param data is the {@link String} to write.
* @param file is the {@link File} to write to.
* @param encoding is the encoding to use for writing the file.
* @throws MojoExecutionException if anything goes wrong.
*/
protected void writeStringToFile( String data, File file, String encoding )
throws MojoExecutionException
{
if (System.getProperty("os.name").contains("Windows"))
{
data = data.replace("\n","\r\n");
}
byte[] binaryData;
try
{
binaryData = data.getBytes( encoding );
if ( file.isFile() && file.canRead() && file.length() == binaryData.length )
{
try (InputStream inputStream = new FileInputStream( file ))
{
byte[] buffer = new byte[binaryData.length];
inputStream.read( buffer );
if ( Arrays.equals( buffer, binaryData ) )
{
getLog().debug( "Arrays.equals( buffer, binaryData ) " );
return;
}
getLog().debug( "Not Arrays.equals( buffer, binaryData ) " );
}
catch ( IOException e )
{
// ignore those exceptions, we will overwrite the file
getLog().debug( "Issue reading file: " + file.getPath(), e );
}
}
else
{
getLog().debug( "file: " + file + ",file.length(): " + file.length() + ", binaryData.length: " + binaryData.length );
}
} catch ( IOException e )
{
throw new MojoExecutionException( "cannot read String as bytes" , e );
}
try (OutputStream outStream = new FileOutputStream( file ))
{
outStream.write( binaryData );
}
catch ( IOException e )
{
throw new MojoExecutionException( "Failed to write to " + file, e );
}
}
/**
* This method creates the flattened POM what is the main task of this plugin.
*
* @param pomFile is the name of the original POM file to read and transform.
* @return the {@link Model} of the flattened POM.
* @throws MojoExecutionException if anything goes wrong (e.g. POM can not be processed).
* @throws MojoFailureException if anything goes wrong (logical error).
*/
protected Model createFlattenedPom( File pomFile ) throws MojoExecutionException, MojoFailureException
{
ModelBuildingRequest buildingRequest = createModelBuildingRequest( pomFile );
Model effectivePom = createEffectivePom( buildingRequest, isEmbedBuildProfileDependencies(), this.flattenMode );
Model flattenedPom = new Model();
// keep original encoding (we could also normalize to UTF-8 here)
String modelEncoding = effectivePom.getModelEncoding();
if ( StringUtils.isEmpty( modelEncoding ) )
{
modelEncoding = "UTF-8";
}
flattenedPom.setModelEncoding( modelEncoding );
Model cleanPom = null;
try {
cleanPom = createCleanPom( effectivePom );
}
catch (Exception e) {
throw new MojoExecutionException("failed to create a clean pom", e);
}
FlattenDescriptor descriptor = getFlattenDescriptor();
Model originalPom = getOriginalModel();
Model resolvedPom = this.project.getModel();
Model interpolatedPom = createResolvedPom( buildingRequest );
// copy the configured additional POM elements...
for ( PomProperty<?> property : PomProperty.getPomProperties() )
{
if ( property.isElement() )
{
Model sourceModel = getSourceModel( descriptor, property, effectivePom, originalPom, resolvedPom,
interpolatedPom, cleanPom );
if ( sourceModel == null )
{
if ( property.isRequired() )
{
throw new MojoFailureException( "Property " + property.getName()
+ " is required and can not be removed!" );
}
}
else
{
property.copy( sourceModel, flattenedPom );
}
}
}
return flattenedPom;
}
private Model createResolvedPom( ModelBuildingRequest buildingRequest ) throws MojoExecutionException {
LoggingModelProblemCollector problems = new LoggingModelProblemCollector( getLog() );
Model originalModel = getOriginalModel();
if (this.flattenMode == FlattenMode.resolveCiFriendliesOnly) {
return this.modelCiFriendlyInterpolator.interpolateModel( originalModel, this.project.getModel().getProjectDirectory(),
buildingRequest, problems );
}
return this.modelInterpolator.interpolateModel( originalModel, this.project.getModel().getProjectDirectory(),
buildingRequest, problems );
}
private Model getOriginalModel() throws MojoExecutionException {
MavenXpp3Reader reader = new MavenXpp3Reader();
try {
return reader.read( new FileInputStream( this.project.getFile() ) );
}
catch ( IOException | XmlPullParserException e ) {
throw new MojoExecutionException( "Error reading raw model.", e );
}
}
/**
* This method creates the clean POM as a {@link Model} where to copy elements from that shall be
* {@link ElementHandling#flatten flattened}. Will be mainly empty but contains some the minimum elements that have
* to be kept in flattened POM.
*
* @param effectivePom is the effective POM.
* @return the clean POM.
* @throws MojoExecutionException if anything goes wrong.
*/
protected Model createCleanPom( Model effectivePom ) throws MojoExecutionException
{
Model cleanPom = new Model();
cleanPom.setGroupId( effectivePom.getGroupId() );
cleanPom.setArtifactId( effectivePom.getArtifactId() );
cleanPom.setVersion( effectivePom.getVersion() );
cleanPom.setPackaging( effectivePom.getPackaging() );
cleanPom.setLicenses( effectivePom.getLicenses() );
// fixed to 4.0.0 forever :)
cleanPom.setModelVersion( "4.0.0" );
// plugins with extensions must stay
Build build = effectivePom.getBuild();
if ( build != null )
{
for ( Plugin plugin : build.getPlugins() )
{
if ( plugin.isExtensions() )
{
Build cleanBuild = cleanPom.getBuild();
if ( cleanBuild == null )
{
cleanBuild = new Build();
cleanPom.setBuild( cleanBuild );
}
Plugin cleanPlugin = new Plugin();
cleanPlugin.setGroupId( plugin.getGroupId() );
cleanPlugin.setArtifactId( plugin.getArtifactId() );
cleanPlugin.setVersion( plugin.getVersion() );
cleanPlugin.setExtensions( true );
cleanBuild.addPlugin( cleanPlugin );
}
}
}
// transform profiles...
Dependencies managedDependencies = new Dependencies();
if ( effectivePom.getDependencyManagement() != null && effectivePom.getDependencyManagement().getDependencies() != null )
{
managedDependencies.addAll( effectivePom.getDependencyManagement().getDependencies() );
}
for ( Profile profile : effectivePom.getProfiles() )
{
if ( !isEmbedBuildProfileDependencies() || !isBuildTimeDriven( profile.getActivation() ) )
{
if ( !isEmpty( profile.getDependencies() ) || !isEmpty( profile.getRepositories() ) )
{
List<Dependency> strippedDependencies = new ArrayList<>();
for ( Dependency dep : profile.getDependencies() )
{
Dependency parsedDep = dep.clone();
if ( managedDependencies.contains( parsedDep ) )
{
parsedDep.setVersion( managedDependencies.resolve( parsedDep ).getVersion() );
String managedDepScope = managedDependencies.resolve( parsedDep ).getScope();
if ( managedDepScope != null )
{
parsedDep.setScope( managedDepScope );
}
if ( parsedDep.getScope() == null )
{
parsedDep.setScope( "compile" );
}
String managedDepOptional = managedDependencies.resolve( parsedDep ).getOptional();
if ( managedDepOptional != null )
{
parsedDep.setOptional( managedDepOptional );
}
if ( parsedDep.getOptional() == null )
{
parsedDep.setOptional( "false" );
}
}
Dependency flattenedDep = createFlattenedDependency( parsedDep );
if ( flattenedDep != null )
{
strippedDependencies.add( flattenedDep );
}
}
if ( !strippedDependencies.isEmpty() || !isEmpty( profile.getRepositories() ) )
{
Profile strippedProfile = new Profile();
strippedProfile.setId( profile.getId() );
strippedProfile.setActivation( profile.getActivation() );
strippedProfile.setDependencies( strippedDependencies.isEmpty() ? null : strippedDependencies );
strippedProfile.setRepositories( profile.getRepositories() );
cleanPom.addProfile( strippedProfile );
}
}
}
}
// transform dependencies...
List<Dependency> dependencies = createFlattenedDependencies( effectivePom );
cleanPom.setDependencies( dependencies );
return cleanPom;
}
private Model getSourceModel( FlattenDescriptor descriptor, PomProperty<?> property, Model effectivePom,
Model originalPom, Model resolvedPom, Model interpolatedPom, Model cleanPom )
{
ElementHandling handling = descriptor.getHandling( property );
getLog().debug( "Property " + property.getName() + " will be handled using " + handling
+ " in flattened POM." );
switch ( handling )
{
case expand:
return effectivePom;
case keep:
return originalPom;
case resolve:
return resolvedPom;
case interpolate:
return interpolatedPom;
case flatten:
return cleanPom;
case remove:
return null;
default:
throw new IllegalStateException( handling.toString() );
}
}
/**
* Creates a flattened {@link List} of {@link Repository} elements where those from super-POM are omitted.
*
* @param repositories is the {@link List} of {@link Repository} elements. May be <code>null</code>.
* @return the flattened {@link List} of {@link Repository} elements or <code>null</code> if <code>null</code> was
* given.
*/
protected static List<Repository> createFlattenedRepositories( List<Repository> repositories )
{
if ( repositories != null )
{
List<Repository> flattenedRepositories = new ArrayList<>( repositories.size() );
for ( Repository repo : repositories )
{
// filter inherited repository section from super POM (see MOJO-2042)...
if ( !isCentralRepositoryFromSuperPom( repo ) )
{
flattenedRepositories.add( repo );
}
}
return flattenedRepositories;
}
return repositories;
}
private FlattenDescriptor getFlattenDescriptor()
throws MojoFailureException
{
FlattenDescriptor descriptor = this.pomElements;
if ( descriptor == null )
{
FlattenMode mode = this.flattenMode;
if ( mode == null )
{
mode = FlattenMode.defaults;
}
else if ( this.flattenMode == FlattenMode.minimum )
{
getLog().warn( "FlattenMode " + FlattenMode.minimum + " is deprecated!" );
}
descriptor = mode.getDescriptor();
if ( "maven-plugin".equals( this.project.getPackaging() ) )
{
descriptor.setPrerequisites( ElementHandling.expand );
}
}
else
{
if ( descriptor.isEmpty() )
{
// legacy approach...
// Can't use Model itself as empty elements are never null, so you can't recognize if it was set or not
Xpp3Dom rawDescriptor = this.mojoExecution.getConfiguration().getChild( "pomElements" );
descriptor = new FlattenDescriptor( rawDescriptor );
}
if ( this.flattenMode != null )
{
descriptor = descriptor.merge( this.flattenMode.getDescriptor() );
}
}
return descriptor;
}
/**
* This method determines if the given {@link Repository} section is identical to what is defined from the super
* POM.
*
* @param repo is the {@link Repository} section to check.
* @return <code>true</code> if maven central default configuration, <code>false</code> otherwise.
*/
private static boolean isCentralRepositoryFromSuperPom( Repository repo )
{
if ( repo != null )
{
if ( "central".equals( repo.getId() ) )
{
RepositoryPolicy snapshots = repo.getSnapshots();
if ( snapshots != null && !snapshots.isEnabled() )
{
return true;
}
}
}
return false;
}
private ModelBuildingRequest createModelBuildingRequest( File pomFile )
{
FlattenModelResolver resolver = new FlattenModelResolver( this.localRepository, this.artifactFactory,
this.dependencyResolver, this.session.getProjectBuildingRequest(), getReactorModelsFromSession() );
Properties userProperties = this.session.getUserProperties();
List<String> activeProfiles = this.session.getRequest().getActiveProfiles();
// @formatter:off
ModelBuildingRequest buildingRequest =
new DefaultModelBuildingRequest().setUserProperties( userProperties ).setSystemProperties( System.getProperties() ).setPomFile( pomFile ).setModelResolver( resolver ).setActiveProfileIds( activeProfiles );
// @formatter:on
return buildingRequest;
}
private List<MavenProject> getReactorModelsFromSession()
{
// robust approach for 'special' environments like m2e (Eclipse plugin) which don't provide allProjects
List<MavenProject> models = this.session.getAllProjects();
if ( models == null )
{
models = this.session.getProjects();
}
if ( models == null )
{
models = Collections.emptyList();
}
return models;
}
/**
* Creates the effective POM for the given <code>pomFile</code> trying its best to match the core maven behaviour.
*
* @param buildingRequest {@link ModelBuildingRequest}
* @param embedBuildProfileDependencies embed build profiles yes/no.
* @param flattenMode the flattening mode
* @return the parsed and calculated effective POM.
* @throws MojoExecutionException if anything goes wrong.
*/
protected Model createEffectivePom( ModelBuildingRequest buildingRequest,
final boolean embedBuildProfileDependencies, final FlattenMode flattenMode )
throws MojoExecutionException
{
ModelBuildingResult buildingResult;
try
{
ProfileInjector customInjector = new ProfileInjector()
{
public void injectProfile( Model model, Profile profile, ModelBuildingRequest request,
ModelProblemCollector problems )
{
List<String> activeProfileIds = request.getActiveProfileIds();
if ( activeProfileIds.contains( profile.getId() ) )
{
Properties merged = new Properties();
merged.putAll( model.getProperties() );
merged.putAll( profile.getProperties() );
model.setProperties( merged );
}
}
};
ProfileSelector customSelector = new ProfileSelector()
{
public List<Profile> getActiveProfiles( Collection<Profile> profiles, ProfileActivationContext context,
ModelProblemCollector problems )
{
List<Profile> activeProfiles = new ArrayList<>( profiles.size() );
for ( Profile profile : profiles )
{
Activation activation = profile.getActivation();
if ( !embedBuildProfileDependencies || isBuildTimeDriven( activation ) )
{
activeProfiles.add( profile );
}
}
return activeProfiles;
}
};
buildingResult = modelBuilderThreadSafetyWorkaround.build( buildingRequest, customInjector, customSelector );
}
catch ( ModelBuildingException e )
{
throw new MojoExecutionException( e.getMessage(), e );
}
Model effectivePom = buildingResult.getEffectiveModel();
// LoggingModelProblemCollector problems = new LoggingModelProblemCollector( getLog() );
// Model interpolatedModel =
// this.modelInterpolator.interpolateModel( this.project.getOriginalModel(),
// effectivePom.getProjectDirectory(), buildingRequest, problems );
// remove Repositories from super POM (central)
effectivePom.setRepositories( createFlattenedRepositories( effectivePom.getRepositories() ) );
return effectivePom;
}
/**
* Null-safe check for {@link Collection#isEmpty()}.
*
* @param collection is the {@link Collection} to test. May be <code>null</code>.
* @return <code>true</code> if <code>null</code> or {@link Collection#isEmpty() empty}, <code>false</code>
* otherwise.
*/
private boolean isEmpty( Collection<?> collection )
{
if ( collection == null )
{
return true;
}
return collection.isEmpty();
}
/**
* @return <code>true</code> if build-dependent profiles (triggered by OS or JDK) should be evaluated and their
* effect (variables and dependencies) are resolved and embedded into the flattened POM while the profile
* itself is stripped. Otherwise if <code>false</code> the profiles will remain untouched.
*/
public boolean isEmbedBuildProfileDependencies()
{
return this.embedBuildProfileDependencies.booleanValue();
}
/**
* @param activation is the {@link Activation} of a {@link Profile}.
* @return <code>true</code> if the given {@link Activation} is build-time driven, <code>false</code> otherwise (if
* it is triggered by OS or JDK).
*/
protected static boolean isBuildTimeDriven( Activation activation )
{
if ( activation == null )
{
return true;
}
if ( StringUtils.isEmpty( activation.getJdk() ) && activation.getOs() == null )
{
return true;
}
return false;
}
/**