src/main/java/org/apache/maven/plugin/compiler/CompilerMojo.java - maven-compiler-plugin - Git at Google

 package org.apache.maven.plugin.compiler;

 /*
  * 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.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;

 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugins.annotations.LifecyclePhase;
 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.MavenProject;
 import org.apache.maven.shared.utils.StringUtils;
 import org.apache.maven.shared.utils.logging.MessageUtils;
 import org.apache.maven.toolchain.Toolchain;
 import org.apache.maven.toolchain.java.DefaultJavaToolChain;
 import org.codehaus.plexus.compiler.util.scan.SimpleSourceInclusionScanner;
 import org.codehaus.plexus.compiler.util.scan.SourceInclusionScanner;
 import org.codehaus.plexus.compiler.util.scan.StaleSourceScanner;
 import org.codehaus.plexus.languages.java.jpms.JavaModuleDescriptor;
 import org.codehaus.plexus.languages.java.jpms.LocationManager;
 import org.codehaus.plexus.languages.java.jpms.QDoxModuleInfoParser;
 import org.codehaus.plexus.languages.java.jpms.ResolvePathsRequest;
 import org.codehaus.plexus.languages.java.jpms.ResolvePathsResult;
 import org.codehaus.plexus.languages.java.jpms.ResolvePathsResult.ModuleNameSource;

 /**
  * Compiles application sources
  *
  * @author <a href="mailto:jason@maven.org">Jason van Zyl </a>
  * @version $Id$
  * @since 2.0
  */
 @Mojo( name = "compile", defaultPhase = LifecyclePhase.COMPILE, threadSafe = true,
     requiresDependencyResolution = ResolutionScope.COMPILE )
 public class CompilerMojo
     extends AbstractCompilerMojo
 {
     /**
      * The source directories containing the sources to be compiled.
      */
     @Parameter( defaultValue = "${project.compileSourceRoots}", readonly = true, required = true )
     private List<String> compileSourceRoots;

     /**
      * The directory for compiled classes.
      */
     @Parameter( defaultValue = "${project.build.outputDirectory}", required = true, readonly = true )
     private File outputDirectory;

     /**
      * Projects main artifact.
      *
      * @todo this is an export variable, really
      */
     @Parameter( defaultValue = "${project.artifact}", readonly = true, required = true )
     private Artifact projectArtifact;

     /**
      * A list of inclusion filters for the compiler.
      */
     @Parameter
     private Set<String> includes = new HashSet<String>();

     /**
      * A list of exclusion filters for the compiler.
      */
     @Parameter
     private Set<String> excludes = new HashSet<String>();

     /**
      * <p>
      * Specify where to place generated source files created by annotation processing. Only applies to JDK 1.6+
      * </p>
      *
      * @since 2.2
      */
     @Parameter( defaultValue = "${project.build.directory}/generated-sources/annotations" )
     private File generatedSourcesDirectory;

     /**
      * Set this to 'true' to bypass compilation of main sources. Its use is NOT RECOMMENDED, but quite convenient on
      * occasion.
      */
     @Parameter( property = "maven.main.skip" )
     private boolean skipMain;

     @Parameter( defaultValue = "${project.compileClasspathElements}", readonly = true, required = true )
     private List<String> compilePath;

     @Parameter
     private boolean allowPartialRequirements;

     private QDoxModuleInfoParser moduleInfoParser = new QDoxModuleInfoParser();

     private LocationManager locationManager = new LocationManager();

     private List<String> classpathElements;

     private List<String> modulepathElements;

     protected List<String> getCompileSourceRoots()
     {
         return compileSourceRoots;
     }

     protected List<String> getClasspathElements()
     {
         return classpathElements;
     }

     @Override
     protected List<String> getModulepathElements()
     {
         return modulepathElements;
     }

     protected File getOutputDirectory()
     {
         return outputDirectory;
     }

     public void execute()
         throws MojoExecutionException, CompilationFailureException
     {
         if ( skipMain )
         {
             getLog().info( "Not compiling main sources" );
             return;
         }

         super.execute();

         if ( outputDirectory.isDirectory() )
         {
             projectArtifact.setFile( outputDirectory );
         }
     }

     @Override
     protected void preparePaths( Set<File> sourceFiles )
     {
         assert compilePath != null;

         JavaModuleDescriptor moduleDescriptor = null;

         boolean hasModuleDescriptor = false;
         for ( File sourceFile : sourceFiles )
         {
             if ( "module-info.java".equals( sourceFile.getName() ) )
             {
                 try
                 {
                     moduleDescriptor = moduleInfoParser.fromSourcePath( sourceFile.getParentFile().toPath() );
                 }
                 catch ( IOException e )
                 {
                     getLog().warn( "Failed to parse module-info.java: " + e.getMessage() );
                 }
                 hasModuleDescriptor = true;
                 break;
             }
         }

         if ( hasModuleDescriptor )
         {
             // For now only allow named modules. Once we can create a graph with ASM we can specify exactly the modules
             // and we can detect if auto modules are used. In that case, MavenProject.setFile() should not be used, so
             // you cannot depend on this project and so it won't be distributed.

             modulepathElements = new ArrayList<String>( compilePath.size() );
             classpathElements = new ArrayList<String>( compilePath.size() );

             ResolvePathsResult<File> analyzerResult;
             try
             {
                 Collection<File> dependencyArtifacts = getCompileClasspathElements( getProject() );

                 ResolvePathsRequest<File> request =
                     ResolvePathsRequest.withFiles( dependencyArtifacts ).setMainModuleDescriptor( moduleDescriptor );

                 Toolchain toolchain = getToolchain();
                 if ( toolchain != null && toolchain instanceof DefaultJavaToolChain )
                 {
                     request.setJdkHome( new File( ( (DefaultJavaToolChain) toolchain ).getJavaHome() ) );
                 }

                 analyzerResult = locationManager.resolvePaths( request );

                 for ( Map.Entry<File, ModuleNameSource> entry : analyzerResult.getModulepathElements().entrySet() )
                 {
                     if ( ModuleNameSource.FILENAME.equals( entry.getValue() ) )
                     {
                         final String message = "Required filename-based automodules detected. "
                             + "Please don't publish this project to a public artifact repository!";

                         if ( moduleDescriptor.exports().isEmpty() )
                         {
                             // application
                             getLog().info( message );
                         }
                         else
                         {
                             // library
                             writeBoxedWarning( message );
                         }
                         break;
                     }
                 }

                 for ( File file : analyzerResult.getClasspathElements() )
                 {
                     classpathElements.add( file.getPath() );
                 }

                 for ( File file : analyzerResult.getModulepathElements().keySet() )
                 {
                     modulepathElements.add( file.getPath() );
                 }
             }
             catch ( IOException e )
             {
                 getLog().warn( e.getMessage() );
             }
         }
         else
         {
             classpathElements = compilePath;
             modulepathElements = Collections.emptyList();
         }
     }

     private List<File> getCompileClasspathElements( MavenProject project )
     {
         List<File> list = new ArrayList<File>( project.getArtifacts().size() + 1 );

         list.add( new File( project.getBuild().getOutputDirectory() ) );

         for ( Artifact a : project.getArtifacts() )
         {
             list.add( a.getFile() );
         }
         return list;
     }

     protected SourceInclusionScanner getSourceInclusionScanner( int staleMillis )
     {
         SourceInclusionScanner scanner;

         if ( includes.isEmpty() && excludes.isEmpty() )
         {
             scanner = new StaleSourceScanner( staleMillis );
         }
         else
         {
             if ( includes.isEmpty() )
             {
                 includes.add( "**/*.java" );
             }
             scanner = new StaleSourceScanner( staleMillis, includes, excludes );
         }

         return scanner;
     }

     protected SourceInclusionScanner getSourceInclusionScanner( String inputFileEnding )
     {
         SourceInclusionScanner scanner;

         // it's not defined if we get the ending with or without the dot '.'
         String defaultIncludePattern = "**/*" + ( inputFileEnding.startsWith( "." ) ? "" : "." ) + inputFileEnding;

         if ( includes.isEmpty() && excludes.isEmpty() )
         {
             includes = Collections.singleton( defaultIncludePattern );
             scanner = new SimpleSourceInclusionScanner( includes, Collections.<String>emptySet() );
         }
         else
         {
             if ( includes.isEmpty() )
             {
                 includes.add( defaultIncludePattern );
             }
             scanner = new SimpleSourceInclusionScanner( includes, excludes );
         }

         return scanner;
     }

     protected String getSource()
     {
         return source;
     }

     protected String getTarget()
     {
         return target;
     }

     @Override
     protected String getRelease()
     {
         return release;
     }

     protected String getCompilerArgument()
     {
         return compilerArgument;
     }

     protected Map<String, String> getCompilerArguments()
     {
         return compilerArguments;
     }

     protected File getGeneratedSourcesDirectory()
     {
         return generatedSourcesDirectory;
     }

     private void writeBoxedWarning( String message )
     {
         String line = StringUtils.repeat( "*", message.length() + 4 );
         getLog().warn( line );
         getLog().warn( "* " + MessageUtils.buffer().strong( message )  + " *" );
         getLog().warn( line );
     }
 }
	package org.apache.maven.plugin.compiler;

	/*
	* 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.io.IOException;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.HashSet;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;

	import org.apache.maven.artifact.Artifact;
	import org.apache.maven.plugin.MojoExecutionException;
	import org.apache.maven.plugins.annotations.LifecyclePhase;
	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.MavenProject;
	import org.apache.maven.shared.utils.StringUtils;
	import org.apache.maven.shared.utils.logging.MessageUtils;
	import org.apache.maven.toolchain.Toolchain;
	import org.apache.maven.toolchain.java.DefaultJavaToolChain;
	import org.codehaus.plexus.compiler.util.scan.SimpleSourceInclusionScanner;
	import org.codehaus.plexus.compiler.util.scan.SourceInclusionScanner;
	import org.codehaus.plexus.compiler.util.scan.StaleSourceScanner;
	import org.codehaus.plexus.languages.java.jpms.JavaModuleDescriptor;
	import org.codehaus.plexus.languages.java.jpms.LocationManager;
	import org.codehaus.plexus.languages.java.jpms.QDoxModuleInfoParser;
	import org.codehaus.plexus.languages.java.jpms.ResolvePathsRequest;
	import org.codehaus.plexus.languages.java.jpms.ResolvePathsResult;
	import org.codehaus.plexus.languages.java.jpms.ResolvePathsResult.ModuleNameSource;

	/**
	* Compiles application sources
	*
	* @author <a href="mailto:jason@maven.org">Jason van Zyl </a>
	* @version $Id$
	* @since 2.0
	*/
	@Mojo( name = "compile", defaultPhase = LifecyclePhase.COMPILE, threadSafe = true,
	requiresDependencyResolution = ResolutionScope.COMPILE )
	public class CompilerMojo
	extends AbstractCompilerMojo
	{
	/**
	* The source directories containing the sources to be compiled.
	*/
	@Parameter( defaultValue = "${project.compileSourceRoots}", readonly = true, required = true )
	private List<String> compileSourceRoots;

	/**
	* The directory for compiled classes.
	*/
	@Parameter( defaultValue = "${project.build.outputDirectory}", required = true, readonly = true )
	private File outputDirectory;

	/**
	* Projects main artifact.
	*
	* @todo this is an export variable, really
	*/
	@Parameter( defaultValue = "${project.artifact}", readonly = true, required = true )
	private Artifact projectArtifact;

	/**
	* A list of inclusion filters for the compiler.
	*/
	@Parameter
	private Set<String> includes = new HashSet<String>();

	/**
	* A list of exclusion filters for the compiler.
	*/
	@Parameter
	private Set<String> excludes = new HashSet<String>();

	/**
	* <p>
	* Specify where to place generated source files created by annotation processing. Only applies to JDK 1.6+
	* </p>
	*
	* @since 2.2
	*/
	@Parameter( defaultValue = "${project.build.directory}/generated-sources/annotations" )
	private File generatedSourcesDirectory;

	/**
	* Set this to 'true' to bypass compilation of main sources. Its use is NOT RECOMMENDED, but quite convenient on
	* occasion.
	*/
	@Parameter( property = "maven.main.skip" )
	private boolean skipMain;

	@Parameter( defaultValue = "${project.compileClasspathElements}", readonly = true, required = true )
	private List<String> compilePath;

	@Parameter
	private boolean allowPartialRequirements;

	private QDoxModuleInfoParser moduleInfoParser = new QDoxModuleInfoParser();

	private LocationManager locationManager = new LocationManager();

	private List<String> classpathElements;

	private List<String> modulepathElements;

	protected List<String> getCompileSourceRoots()
	{
	return compileSourceRoots;
	}

	protected List<String> getClasspathElements()
	{
	return classpathElements;
	}

	@Override
	protected List<String> getModulepathElements()
	{
	return modulepathElements;
	}

	protected File getOutputDirectory()
	{
	return outputDirectory;
	}

	public void execute()
	throws MojoExecutionException, CompilationFailureException
	{
	if ( skipMain )
	{
	getLog().info( "Not compiling main sources" );
	return;
	}

	super.execute();

	if ( outputDirectory.isDirectory() )
	{
	projectArtifact.setFile( outputDirectory );
	}
	}

	@Override
	protected void preparePaths( Set<File> sourceFiles )
	{
	assert compilePath != null;

	JavaModuleDescriptor moduleDescriptor = null;

	boolean hasModuleDescriptor = false;
	for ( File sourceFile : sourceFiles )
	{
	if ( "module-info.java".equals( sourceFile.getName() ) )
	{
	try
	{
	moduleDescriptor = moduleInfoParser.fromSourcePath( sourceFile.getParentFile().toPath() );
	}
	catch ( IOException e )
	{
	getLog().warn( "Failed to parse module-info.java: " + e.getMessage() );
	}
	hasModuleDescriptor = true;
	break;
	}
	}

	if ( hasModuleDescriptor )
	{
	// For now only allow named modules. Once we can create a graph with ASM we can specify exactly the modules
	// and we can detect if auto modules are used. In that case, MavenProject.setFile() should not be used, so
	// you cannot depend on this project and so it won't be distributed.

	modulepathElements = new ArrayList<String>( compilePath.size() );
	classpathElements = new ArrayList<String>( compilePath.size() );

	ResolvePathsResult<File> analyzerResult;
	try
	{
	Collection<File> dependencyArtifacts = getCompileClasspathElements( getProject() );

	ResolvePathsRequest<File> request =
	ResolvePathsRequest.withFiles( dependencyArtifacts ).setMainModuleDescriptor( moduleDescriptor );

	Toolchain toolchain = getToolchain();
	if ( toolchain != null && toolchain instanceof DefaultJavaToolChain )
	{
	request.setJdkHome( new File( ( (DefaultJavaToolChain) toolchain ).getJavaHome() ) );
	}

	analyzerResult = locationManager.resolvePaths( request );

	for ( Map.Entry<File, ModuleNameSource> entry : analyzerResult.getModulepathElements().entrySet() )
	{
	if ( ModuleNameSource.FILENAME.equals( entry.getValue() ) )
	{
	final String message = "Required filename-based automodules detected. "
	+ "Please don't publish this project to a public artifact repository!";

	if ( moduleDescriptor.exports().isEmpty() )
	{
	// application
	getLog().info( message );
	}
	else
	{
	// library
	writeBoxedWarning( message );
	}
	break;
	}
	}

	for ( File file : analyzerResult.getClasspathElements() )
	{
	classpathElements.add( file.getPath() );
	}

	for ( File file : analyzerResult.getModulepathElements().keySet() )
	{
	modulepathElements.add( file.getPath() );
	}
	}
	catch ( IOException e )
	{
	getLog().warn( e.getMessage() );
	}
	}
	else
	{
	classpathElements = compilePath;
	modulepathElements = Collections.emptyList();
	}
	}

	private List<File> getCompileClasspathElements( MavenProject project )
	{
	List<File> list = new ArrayList<File>( project.getArtifacts().size() + 1 );

	list.add( new File( project.getBuild().getOutputDirectory() ) );

	for ( Artifact a : project.getArtifacts() )
	{
	list.add( a.getFile() );
	}
	return list;
	}

	protected SourceInclusionScanner getSourceInclusionScanner( int staleMillis )
	{
	SourceInclusionScanner scanner;

	if ( includes.isEmpty() && excludes.isEmpty() )
	{
	scanner = new StaleSourceScanner( staleMillis );
	}
	else
	{
	if ( includes.isEmpty() )
	{
	includes.add( "*/.java" );
	}
	scanner = new StaleSourceScanner( staleMillis, includes, excludes );
	}

	return scanner;
	}

	protected SourceInclusionScanner getSourceInclusionScanner( String inputFileEnding )
	{
	SourceInclusionScanner scanner;

	// it's not defined if we get the ending with or without the dot '.'
	String defaultIncludePattern = "*/" + ( inputFileEnding.startsWith( "." ) ? "" : "." ) + inputFileEnding;

	if ( includes.isEmpty() && excludes.isEmpty() )
	{
	includes = Collections.singleton( defaultIncludePattern );
	scanner = new SimpleSourceInclusionScanner( includes, Collections.<String>emptySet() );
	}
	else
	{
	if ( includes.isEmpty() )
	{
	includes.add( defaultIncludePattern );
	}
	scanner = new SimpleSourceInclusionScanner( includes, excludes );
	}

	return scanner;
	}

	protected String getSource()
	{
	return source;
	}

	protected String getTarget()
	{
	return target;
	}

	@Override
	protected String getRelease()
	{
	return release;
	}

	protected String getCompilerArgument()
	{
	return compilerArgument;
	}

	protected Map<String, String> getCompilerArguments()
	{
	return compilerArguments;
	}

	protected File getGeneratedSourcesDirectory()
	{
	return generatedSourcesDirectory;
	}

	private void writeBoxedWarning( String message )
	{
	String line = StringUtils.repeat( "*", message.length() + 4 );
	getLog().warn( line );
	getLog().warn( "* " + MessageUtils.buffer().strong( message ) + " *" );
	getLog().warn( line );
	}
	}