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apache / maven-compiler-plugin / 1b0d19ab17f4aadffffb049a8a911c650182319f / . / src / main / java / org / apache / maven / plugin / compiler / AbstractCompilerMojo.java
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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.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Date;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.DefaultArtifact;
import org.apache.maven.artifact.handler.ArtifactHandler;
import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
import org.apache.maven.artifact.resolver.ArtifactResolutionRequest;
import org.apache.maven.artifact.resolver.ArtifactResolutionResult;
import org.apache.maven.artifact.resolver.ResolutionErrorHandler;
import org.apache.maven.artifact.versioning.VersionRange;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugins.annotations.Component;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.project.MavenProject;
import org.apache.maven.repository.RepositorySystem;
import org.apache.maven.shared.incremental.IncrementalBuildHelper;
import org.apache.maven.shared.incremental.IncrementalBuildHelperRequest;
import org.apache.maven.shared.utils.ReaderFactory;
import org.apache.maven.shared.utils.StringUtils;
import org.apache.maven.shared.utils.io.FileUtils;
import org.apache.maven.shared.utils.logging.MessageBuilder;
import org.apache.maven.shared.utils.logging.MessageUtils;
import org.apache.maven.toolchain.Toolchain;
import org.apache.maven.toolchain.ToolchainManager;
import org.codehaus.plexus.compiler.Compiler;
import org.codehaus.plexus.compiler.CompilerConfiguration;
import org.codehaus.plexus.compiler.CompilerError;
import org.codehaus.plexus.compiler.CompilerException;
import org.codehaus.plexus.compiler.CompilerMessage;
import org.codehaus.plexus.compiler.CompilerNotImplementedException;
import org.codehaus.plexus.compiler.CompilerOutputStyle;
import org.codehaus.plexus.compiler.CompilerResult;
import org.codehaus.plexus.compiler.manager.CompilerManager;
import org.codehaus.plexus.compiler.manager.NoSuchCompilerException;
import org.codehaus.plexus.compiler.util.scan.InclusionScanException;
import org.codehaus.plexus.compiler.util.scan.SourceInclusionScanner;
import org.codehaus.plexus.compiler.util.scan.mapping.SingleTargetSourceMapping;
import org.codehaus.plexus.compiler.util.scan.mapping.SourceMapping;
import org.codehaus.plexus.compiler.util.scan.mapping.SuffixMapping;
import org.codehaus.plexus.languages.java.jpms.JavaModuleDescriptor;
import org.codehaus.plexus.languages.java.version.JavaVersion;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Opcodes;
/**
* TODO: At least one step could be optimized, currently the plugin will do two
* scans of all the source code if the compiler has to have the entire set of
* sources. This is currently the case for at least the C# compiler and most
* likely all the other .NET compilers too.
*
* @author others
* @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
* @since 2.0
*/
public abstract class AbstractCompilerMojo
extends AbstractMojo
{
protected static final String PS = System.getProperty( "path.separator" );
static final String DEFAULT_SOURCE = "1.7";
static final String DEFAULT_TARGET = "1.7";
// Used to compare with older targets
static final String MODULE_INFO_TARGET = "1.9";
// ----------------------------------------------------------------------
// Configurables
// ----------------------------------------------------------------------
/**
* Indicates whether the build will continue even if there are compilation errors.
*
* @since 2.0.2
*/
@Parameter( property = "maven.compiler.failOnError", defaultValue = "true" )
private boolean failOnError = true;
/**
* Indicates whether the build will continue even if there are compilation warnings.
*
* @since 3.6
*/
@Parameter( property = "maven.compiler.failOnWarning", defaultValue = "false" )
private boolean failOnWarning;
/**
* Set to <code>true</code> to include debugging information in the compiled class files.
*/
@Parameter( property = "maven.compiler.debug", defaultValue = "true" )
private boolean debug = true;
/**
* Set to <code>true</code> to generate metadata for reflection on method parameters.
* @since 3.6.2
*/
@Parameter( property = "maven.compiler.parameters", defaultValue = "false" )
private boolean parameters;
/**
* Set to <code>true</code> to Enable preview language features of the java compiler
* @since 3.10.1
*/
@Parameter( property = "maven.compiler.enablePreview", defaultValue = "false" )
private boolean enablePreview;
/**
* Set to <code>true</code> to show messages about what the compiler is doing.
*/
@Parameter( property = "maven.compiler.verbose", defaultValue = "false" )
private boolean verbose;
/**
* Sets whether to show source locations where deprecated APIs are used.
*/
@Parameter( property = "maven.compiler.showDeprecation", defaultValue = "false" )
private boolean showDeprecation;
/**
* Set to <code>true</code> to optimize the compiled code using the compiler's optimization methods.
* @deprecated This property is a no-op in {@code javac}.
*/
@Deprecated
@Parameter( property = "maven.compiler.optimize", defaultValue = "false" )
private boolean optimize;
/**
* Set to <code>true</code> to show compilation warnings.
*/
@Parameter( property = "maven.compiler.showWarnings", defaultValue = "false" )
private boolean showWarnings;
/**
* <p>The -source argument for the Java compiler.</p>
*
* <b>NOTE: </b>Since 3.8.0 the default value has changed from 1.5 to 1.6.
* Since 3.9.0 the default value has changed from 1.6 to 1.7
*/
@Parameter( property = "maven.compiler.source", defaultValue = DEFAULT_SOURCE )
protected String source;
/**
* <p>The -target argument for the Java compiler.</p>
*
* <b>NOTE: </b>Since 3.8.0 the default value has changed from 1.5 to 1.6.
* Since 3.9.0 the default value has changed from 1.6 to 1.7
*/
@Parameter( property = "maven.compiler.target", defaultValue = DEFAULT_TARGET )
protected String target;
/**
* The -release argument for the Java compiler, supported since Java9
*
* @since 3.6
*/
@Parameter( property = "maven.compiler.release" )
protected String release;
/**
* The -encoding argument for the Java compiler.
*
* @since 2.1
*/
@Parameter( property = "encoding", defaultValue = "${project.build.sourceEncoding}" )
private String encoding;
/**
* Sets the granularity in milliseconds of the last modification
* date for testing whether a source needs recompilation.
*/
@Parameter( property = "lastModGranularityMs", defaultValue = "0" )
private int staleMillis;
/**
* The compiler id of the compiler to use. See this
* <a href="non-javac-compilers.html">guide</a> for more information.
*/
@Parameter( property = "maven.compiler.compilerId", defaultValue = "javac" )
private String compilerId;
/**
* Version of the compiler to use, ex. "1.3", "1.5", if {@link #fork} is set to <code>true</code>.
*/
@Parameter( property = "maven.compiler.compilerVersion" )
private String compilerVersion;
/**
* Allows running the compiler in a separate process.
* If <code>false</code> it uses the built in compiler, while if <code>true</code> it will use an executable.
*/
@Parameter( property = "maven.compiler.fork", defaultValue = "false" )
private boolean fork;
/**
* Initial size, in megabytes, of the memory allocation pool, ex. "64", "64m"
* if {@link #fork} is set to <code>true</code>.
*
* @since 2.0.1
*/
@Parameter( property = "maven.compiler.meminitial" )
private String meminitial;
/**
* Sets the maximum size, in megabytes, of the memory allocation pool, ex. "128", "128m"
* if {@link #fork} is set to <code>true</code>.
*
* @since 2.0.1
*/
@Parameter( property = "maven.compiler.maxmem" )
private String maxmem;
/**
* Sets the executable of the compiler to use when {@link #fork} is <code>true</code>.
*/
@Parameter( property = "maven.compiler.executable" )
private String executable;
/**
* <p>
* Sets whether annotation processing is performed or not. Only applies to JDK 1.6+
* If not set, both compilation and annotation processing are performed at the same time.
* </p>
* <p>Allowed values are:</p>
* <ul>
* <li><code>none</code> - no annotation processing is performed.</li>
* <li><code>only</code> - only annotation processing is done, no compilation.</li>
* </ul>
*
* @since 2.2
*/
@Parameter
private String proc;
/**
* <p>
* Names of annotation processors to run. Only applies to JDK 1.6+
* If not set, the default annotation processors discovery process applies.
* </p>
*
* @since 2.2
*/
@Parameter
private String[] annotationProcessors;
/**
* <p>
* Classpath elements to supply as annotation processor path. If specified, the compiler will detect annotation
* processors only in those classpath elements. If omitted, the default classpath is used to detect annotation
* processors. The detection itself depends on the configuration of {@code annotationProcessors}.
* </p>
* <p>
* Each classpath element is specified using their Maven coordinates (groupId, artifactId, version, classifier,
* type). Transitive dependencies are added automatically. Example:
* </p>
*
* <pre>
* &lt;configuration&gt;
* &lt;annotationProcessorPaths&gt;
* &lt;path&gt;
* &lt;groupId&gt;org.sample&lt;/groupId&gt;
* &lt;artifactId&gt;sample-annotation-processor&lt;/artifactId&gt;
* &lt;version&gt;1.2.3&lt;/version&gt;
* &lt;/path&gt;
* &lt;!-- ... more ... --&gt;
* &lt;/annotationProcessorPaths&gt;
* &lt;/configuration&gt;
* </pre>
*
* @since 3.5
*/
@Parameter
private List<DependencyCoordinate> annotationProcessorPaths;
/**
* <p>
* Sets the arguments to be passed to the compiler (prepending a dash).
* </p>
* <p>
* This is because the list of valid arguments passed to a Java compiler varies based on the compiler version.
* </p>
* <p>
* Note that {@code -J} options are only passed through if {@link #fork} is set to {@code true}.
* </p>
* <p>
* To pass <code>-Xmaxerrs 1000 -Xlint -Xlint:-path -Averbose=true</code> you should include the following:
* </p>
*
* <pre>
* &lt;compilerArguments&gt;
* &lt;Xmaxerrs&gt;1000&lt;/Xmaxerrs&gt;
* &lt;Xlint/&gt;
* &lt;Xlint:-path/&gt;
* &lt;Averbose&gt;true&lt;/Averbose&gt;
* &lt;/compilerArguments&gt;
* </pre>
*
* @since 2.0.1
* @deprecated use {@link #compilerArgs} instead.
*/
@Parameter
@Deprecated
protected Map<String, String> compilerArguments;
/**
* <p>
* Sets the arguments to be passed to the compiler.
* </p>
* <p>
* Note that {@code -J} options are only passed through if {@link #fork} is set to {@code true}.
* </p>
* Example:
* <pre>
* &lt;compilerArgs&gt;
* &lt;arg&gt;-Xmaxerrs&lt;/arg&gt;
* &lt;arg&gt;1000&lt;/arg&gt;
* &lt;arg&gt;-Xlint&lt;/arg&gt;
* &lt;arg&gt;-J-Duser.language=en_us&lt;/arg&gt;
* &lt;/compilerArgs&gt;
* </pre>
*
* @since 3.1
*/
@Parameter
protected List<String> compilerArgs;
/**
* <p>
* Sets the unformatted single argument string to be passed to the compiler. To pass multiple arguments such as
* <code>-Xmaxerrs 1000</code> (which are actually two arguments) you have to use {@link #compilerArguments}.
* </p>
* <p>
* This is because the list of valid arguments passed to a Java compiler varies based on the compiler version.
* </p>
* <p>
* Note that {@code -J} options are only passed through if {@link #fork} is set to {@code true}.
* </p>
*/
@Parameter
protected String compilerArgument;
/**
* Sets the name of the output file when compiling a set of
* sources to a single file.
* <p/>
* expression="${project.build.finalName}"
*/
@Parameter
private String outputFileName;
/**
* Keyword list to be appended to the <code>-g</code> command-line switch. Legal values are none or a
* comma-separated list of the following keywords: <code>lines</code>, <code>vars</code>, and <code>source</code>.
* If debug level is not specified, by default, nothing will be appended to <code>-g</code>.
* If debug is not turned on, this attribute will be ignored.
*
* @since 2.1
*/
@Parameter( property = "maven.compiler.debuglevel" )
private String debuglevel;
/**
* Keyword to be appended to the <code>-implicit:</code> command-line switch.
*
* @since 3.10.2
*/
@Parameter( property = "maven.compiler.implicit" )
private String implicit;
/**
*
*/
@Component
private ToolchainManager toolchainManager;
/**
* <p>
* Specify the requirements for this jdk toolchain for using a different {@code javac} than the one of the JRE used
* by Maven. This overrules the toolchain selected by the
* <a href="https://maven.apache.org/plugins/maven-toolchains-plugin/">maven-toolchain-plugin</a>.
* </p>
* (see <a href="https://maven.apache.org/guides/mini/guide-using-toolchains.html"> Guide to Toolchains</a> for more
* info)
*
* <pre>
* &lt;configuration&gt;
* &lt;jdkToolchain&gt;
* &lt;version&gt;11&lt;/version&gt;
* &lt;/jdkToolchain&gt;
* ...
* &lt;/configuration&gt;
*
* &lt;configuration&gt;
* &lt;jdkToolchain&gt;
* &lt;version&gt;1.8&lt;/version&gt;
* &lt;vendor&gt;zulu&lt;/vendor&gt;
* &lt;/jdkToolchain&gt;
* ...
* &lt;/configuration&gt;
* </pre>
* <strong>note:</strong> requires at least Maven 3.3.1
*
* @since 3.6
*/
@Parameter
private Map<String, String> jdkToolchain;
// ----------------------------------------------------------------------
// Read-only parameters
// ----------------------------------------------------------------------
/**
* The directory to run the compiler from if fork is true.
*/
@Parameter( defaultValue = "${basedir}", required = true, readonly = true )
private File basedir;
/**
* The target directory of the compiler if fork is true.
*/
@Parameter( defaultValue = "${project.build.directory}", required = true, readonly = true )
private File buildDirectory;
/**
* Plexus compiler manager.
*/
@Component
private CompilerManager compilerManager;
/**
* The current build session instance. This is used for toolchain manager API calls.
*/
@Parameter( defaultValue = "${session}", readonly = true, required = true )
private MavenSession session;
/**
* The current project instance. This is used for propagating generated-sources paths as compile/testCompile source
* roots.
*/
@Parameter( defaultValue = "${project}", readonly = true, required = true )
private MavenProject project;
/**
* Strategy to re use javacc class created:
* <ul>
* <li><code>reuseCreated</code> (default): will reuse already created but in case of multi-threaded builds, each
* thread will have its own instance</li>
* <li><code>reuseSame</code>: the same Javacc class will be used for each compilation even for multi-threaded build
* </li>
* <li><code>alwaysNew</code>: a new Javacc class will be created for each compilation</li>
* </ul>
* Note this parameter value depends on the os/jdk you are using, but the default value should work on most of env.
*
* @since 2.5
*/
@Parameter( defaultValue = "${reuseCreated}", property = "maven.compiler.compilerReuseStrategy" )
private String compilerReuseStrategy = "reuseCreated";
/**
* @since 2.5
*/
@Parameter( defaultValue = "false", property = "maven.compiler.skipMultiThreadWarning" )
private boolean skipMultiThreadWarning;
/**
* compiler can now use javax.tools if available in your current jdk, you can disable this feature
* using -Dmaven.compiler.forceJavacCompilerUse=true or in the plugin configuration
*
* @since 3.0
*/
@Parameter( defaultValue = "false", property = "maven.compiler.forceJavacCompilerUse" )
private boolean forceJavacCompilerUse;
/**
* @since 3.0 needed for storing the status for the incremental build support.
*/
@Parameter( defaultValue = "${mojoExecution}", readonly = true, required = true )
private MojoExecution mojoExecution;
/**
* File extensions to check timestamp for incremental build.
* Default contains only <code>class</code> and <code>jar</code>.
*
* @since 3.1
*/
@Parameter
private List<String> fileExtensions;
/**
* <p>to enable/disable incremental compilation feature.</p>
* <p>This leads to two different modes depending on the underlying compiler. The default javac compiler does the
* following:</p>
* <ul>
* <li>true <strong>(default)</strong> in this mode the compiler plugin determines whether any JAR files the
* current module depends on have changed in the current build run; or any source file was added, removed or
* changed since the last compilation. If this is the case, the compiler plugin recompiles all sources.</li>
* <li>false <strong>(not recommended)</strong> this only compiles source files which are newer than their
* corresponding class files, namely which have changed since the last compilation. This does not
* recompile other classes which use the changed class, potentially leaving them with references to methods that no
* longer exist, leading to errors at runtime.</li>
* </ul>
*
* @since 3.1
*/
@Parameter( defaultValue = "true", property = "maven.compiler.useIncrementalCompilation" )
private boolean useIncrementalCompilation = true;
/**
* Package info source files that only contain javadoc and no annotation on the package
* can lead to no class file being generated by the compiler. This causes a file miss
* on the next compilations and forces an unnecessary recompilation. The default value
* of <code>true</code> causes an empty class file to be generated. This behavior can
* be changed by setting this parameter to <code>false</code>.
*
* @since 3.10
*/
@Parameter( defaultValue = "true", property = "maven.compiler.createMissingPackageInfoClass" )
private boolean createMissingPackageInfoClass = true;
/**
* Resolves the artifacts needed.
*/
@Component
private RepositorySystem repositorySystem;
/**
* Artifact handler manager.
*/
@Component
private ArtifactHandlerManager artifactHandlerManager;
/**
* Throws an exception on artifact resolution errors.
*/
@Component
private ResolutionErrorHandler resolutionErrorHandler;
protected abstract SourceInclusionScanner getSourceInclusionScanner( int staleMillis );
protected abstract SourceInclusionScanner getSourceInclusionScanner( String inputFileEnding );
protected abstract List<String> getClasspathElements();
protected abstract List<String> getModulepathElements();
protected abstract Map<String, JavaModuleDescriptor> getPathElements();
protected abstract List<String> getCompileSourceRoots();
protected abstract void preparePaths( Set<File> sourceFiles );
protected abstract File getOutputDirectory();
protected abstract String getSource();
protected abstract String getTarget();
protected abstract String getRelease();
protected abstract String getCompilerArgument();
protected abstract Map<String, String> getCompilerArguments();
protected abstract File getGeneratedSourcesDirectory();
protected abstract String getDebugFileName();
protected final MavenProject getProject()
{
return project;
}
private boolean targetOrReleaseSet;
@Override
public void execute()
throws MojoExecutionException, CompilationFailureException
{
// ----------------------------------------------------------------------
// Look up the compiler. This is done before other code than can
// cause the mojo to return before the lookup is done possibly resulting
// in misconfigured POMs still building.
// ----------------------------------------------------------------------
Compiler compiler;
getLog().debug( "Using compiler '" + compilerId + "'." );
try
{
compiler = compilerManager.getCompiler( compilerId );
}
catch ( NoSuchCompilerException e )
{
throw new MojoExecutionException( "No such compiler '" + e.getCompilerId() + "'." );
}
//-----------toolchains start here ----------------------------------
//use the compilerId as identifier for toolchains as well.
Toolchain tc = getToolchain();
if ( tc != null )
{
getLog().info( "Toolchain in maven-compiler-plugin: " + tc );
if ( executable != null )
{
getLog().warn( "Toolchains are ignored, 'executable' parameter is set to " + executable );
}
else
{
fork = true;
//TODO somehow shaky dependency between compilerId and tool executable.
executable = tc.findTool( compilerId );
}
}
// ----------------------------------------------------------------------
//
// ----------------------------------------------------------------------
List<String> compileSourceRoots = removeEmptyCompileSourceRoots( getCompileSourceRoots() );
if ( compileSourceRoots.isEmpty() )
{
getLog().info( "No sources to compile" );
return;
}
// Verify that target or release is set
if ( !targetOrReleaseSet )
{
MessageBuilder mb = MessageUtils.buffer().a( "No explicit value set for target or release! " )
.a( "To ensure the same result even after upgrading this plugin, please add " ).newline()
.newline();
writePlugin( mb );
getLog().warn( mb.toString() );
}
// ----------------------------------------------------------------------
// Create the compiler configuration
// ----------------------------------------------------------------------
CompilerConfiguration compilerConfiguration = new CompilerConfiguration();
compilerConfiguration.setOutputLocation( getOutputDirectory().getAbsolutePath() );
compilerConfiguration.setOptimize( optimize );
compilerConfiguration.setDebug( debug );
compilerConfiguration.setDebugFileName( getDebugFileName() );
compilerConfiguration.setImplicitOption( implicit );
if ( debug && StringUtils.isNotEmpty( debuglevel ) )
{
String[] split = StringUtils.split( debuglevel, "," );
for ( String aSplit : split )
{
if ( !( aSplit.equalsIgnoreCase( "none" ) || aSplit.equalsIgnoreCase( "lines" )
|| aSplit.equalsIgnoreCase( "vars" ) || aSplit.equalsIgnoreCase( "source" ) ) )
{
throw new IllegalArgumentException( "The specified debug level: '" + aSplit + "' is unsupported. "
+ "Legal values are 'none', 'lines', 'vars', and 'source'." );
}
}
compilerConfiguration.setDebugLevel( debuglevel );
}
compilerConfiguration.setParameters( parameters );
compilerConfiguration.setEnablePreview( enablePreview );
compilerConfiguration.setVerbose( verbose );
compilerConfiguration.setShowWarnings( showWarnings );
compilerConfiguration.setFailOnWarning( failOnWarning );
compilerConfiguration.setShowDeprecation( showDeprecation );
compilerConfiguration.setSourceVersion( getSource() );
compilerConfiguration.setTargetVersion( getTarget() );
compilerConfiguration.setReleaseVersion( getRelease() );
compilerConfiguration.setProc( proc );
File generatedSourcesDirectory = getGeneratedSourcesDirectory();
compilerConfiguration.setGeneratedSourcesDirectory( generatedSourcesDirectory != null
? generatedSourcesDirectory.getAbsoluteFile() : null );
if ( generatedSourcesDirectory != null )
{
if ( !generatedSourcesDirectory.exists() )
{
generatedSourcesDirectory.mkdirs();
}
String generatedSourcesPath = generatedSourcesDirectory.getAbsolutePath();
compileSourceRoots.add( generatedSourcesPath );
if ( isTestCompile() )
{
getLog().debug( "Adding " + generatedSourcesPath + " to test-compile source roots:\n "
+ StringUtils.join( project.getTestCompileSourceRoots()
.iterator(), "\n " ) );
project.addTestCompileSourceRoot( generatedSourcesPath );
getLog().debug( "New test-compile source roots:\n "
+ StringUtils.join( project.getTestCompileSourceRoots()
.iterator(), "\n " ) );
}
else
{
getLog().debug( "Adding " + generatedSourcesPath + " to compile source roots:\n "
+ StringUtils.join( project.getCompileSourceRoots()
.iterator(), "\n " ) );
project.addCompileSourceRoot( generatedSourcesPath );
getLog().debug( "New compile source roots:\n " + StringUtils.join( project.getCompileSourceRoots()
.iterator(), "\n " ) );
}
}
compilerConfiguration.setSourceLocations( compileSourceRoots );
compilerConfiguration.setAnnotationProcessors( annotationProcessors );
compilerConfiguration.setProcessorPathEntries( resolveProcessorPathEntries() );
compilerConfiguration.setSourceEncoding( encoding );
compilerConfiguration.setFork( fork );
if ( fork )
{
if ( !StringUtils.isEmpty( meminitial ) )
{
String value = getMemoryValue( meminitial );
if ( value != null )
{
compilerConfiguration.setMeminitial( value );
}
else
{
getLog().info( "Invalid value for meminitial '" + meminitial + "'. Ignoring this option." );
}
}
if ( !StringUtils.isEmpty( maxmem ) )
{
String value = getMemoryValue( maxmem );
if ( value != null )
{
compilerConfiguration.setMaxmem( value );
}
else
{
getLog().info( "Invalid value for maxmem '" + maxmem + "'. Ignoring this option." );
}
}
}
compilerConfiguration.setExecutable( executable );
compilerConfiguration.setWorkingDirectory( basedir );
compilerConfiguration.setCompilerVersion( compilerVersion );
compilerConfiguration.setBuildDirectory( buildDirectory );
compilerConfiguration.setOutputFileName( outputFileName );
if ( CompilerConfiguration.CompilerReuseStrategy.AlwaysNew.getStrategy().equals( this.compilerReuseStrategy ) )
{
compilerConfiguration.setCompilerReuseStrategy( CompilerConfiguration.CompilerReuseStrategy.AlwaysNew );
}
else if ( CompilerConfiguration.CompilerReuseStrategy.ReuseSame.getStrategy().equals(
this.compilerReuseStrategy ) )
{
if ( getRequestThreadCount() > 1 )
{
if ( !skipMultiThreadWarning )
{
getLog().warn( "You are in a multi-thread build and compilerReuseStrategy is set to reuseSame."
+ " This can cause issues in some environments (os/jdk)!"
+ " Consider using reuseCreated strategy."
+ System.getProperty( "line.separator" )
+ "If your env is fine with reuseSame, you can skip this warning with the "
+ "configuration field skipMultiThreadWarning "
+ "or -Dmaven.compiler.skipMultiThreadWarning=true" );
}
}
compilerConfiguration.setCompilerReuseStrategy( CompilerConfiguration.CompilerReuseStrategy.ReuseSame );
}
else
{
compilerConfiguration.setCompilerReuseStrategy( CompilerConfiguration.CompilerReuseStrategy.ReuseCreated );
}
getLog().debug( "CompilerReuseStrategy: " + compilerConfiguration.getCompilerReuseStrategy().getStrategy() );
compilerConfiguration.setForceJavacCompilerUse( forceJavacCompilerUse );
boolean canUpdateTarget;
IncrementalBuildHelper incrementalBuildHelper = new IncrementalBuildHelper( mojoExecution, session );
final Set<File> sources;
IncrementalBuildHelperRequest incrementalBuildHelperRequest = null;
if ( useIncrementalCompilation )
{
getLog().debug( "useIncrementalCompilation enabled" );
try
{
canUpdateTarget = compiler.canUpdateTarget( compilerConfiguration );
sources = getCompileSources( compiler, compilerConfiguration );
preparePaths( sources );
incrementalBuildHelperRequest = new IncrementalBuildHelperRequest().inputFiles( sources );
// CHECKSTYLE_OFF: LineLength
if ( ( compiler.getCompilerOutputStyle().equals( CompilerOutputStyle.ONE_OUTPUT_FILE_FOR_ALL_INPUT_FILES ) && !canUpdateTarget )
|| isDependencyChanged()
|| isSourceChanged( compilerConfiguration, compiler )
|| incrementalBuildHelper.inputFileTreeChanged( incrementalBuildHelperRequest ) )
// CHECKSTYLE_ON: LineLength
{
getLog().info( "Changes detected - recompiling the module!" );
compilerConfiguration.setSourceFiles( sources );
}
else
{
getLog().info( "Nothing to compile - all classes are up to date" );
return;
}
}
catch ( CompilerException e )
{
throw new MojoExecutionException( "Error while computing stale sources.", e );
}
}
else
{
getLog().debug( "useIncrementalCompilation disabled" );
Set<File> staleSources;
try
{
staleSources =
computeStaleSources( compilerConfiguration, compiler, getSourceInclusionScanner( staleMillis ) );
canUpdateTarget = compiler.canUpdateTarget( compilerConfiguration );
if ( compiler.getCompilerOutputStyle().equals( CompilerOutputStyle.ONE_OUTPUT_FILE_FOR_ALL_INPUT_FILES )
&& !canUpdateTarget )
{
getLog().info( "RESCANNING!" );
// TODO: This second scan for source files is sub-optimal
String inputFileEnding = compiler.getInputFileEnding( compilerConfiguration );
staleSources = computeStaleSources( compilerConfiguration, compiler,
getSourceInclusionScanner( inputFileEnding ) );
}
}
catch ( CompilerException e )
{
throw new MojoExecutionException( "Error while computing stale sources.", e );
}
if ( staleSources.isEmpty() )
{
getLog().info( "Nothing to compile - all classes are up to date" );
return;
}
compilerConfiguration.setSourceFiles( staleSources );
try
{
// MCOMPILER-366: if sources contain the module-descriptor it must be used to define the modulepath
sources = getCompileSources( compiler, compilerConfiguration );
if ( getLog().isDebugEnabled() )
{
getLog().debug( "#sources: " + sources.size() );
for ( File file : sources )
{
getLog().debug( file.getPath() );
}
}
preparePaths( sources );
}
catch ( CompilerException e )
{
throw new MojoExecutionException( "Error while computing stale sources.", e );
}
}
// Dividing pathElements of classPath and modulePath is based on sourceFiles
compilerConfiguration.setClasspathEntries( getClasspathElements() );
compilerConfiguration.setModulepathEntries( getModulepathElements() );
compilerConfiguration.setIncludes( getIncludes() );
compilerConfiguration.setExcludes( getExcludes() );
Map<String, String> effectiveCompilerArguments = getCompilerArguments();
String effectiveCompilerArgument = getCompilerArgument();
if ( ( effectiveCompilerArguments != null ) || ( effectiveCompilerArgument != null )
|| ( compilerArgs != null ) )
{
if ( effectiveCompilerArguments != null )
{
for ( Map.Entry<String, String> me : effectiveCompilerArguments.entrySet() )
{
String key = me.getKey();
String value = me.getValue();
if ( !key.startsWith( "-" ) )
{
key = "-" + key;
}
if ( key.startsWith( "-A" ) && StringUtils.isNotEmpty( value ) )
{
compilerConfiguration.addCompilerCustomArgument( key + "=" + value, null );
}
else
{
compilerConfiguration.addCompilerCustomArgument( key, value );
}
}
}
if ( !StringUtils.isEmpty( effectiveCompilerArgument ) )
{
compilerConfiguration.addCompilerCustomArgument( effectiveCompilerArgument, null );
}
if ( compilerArgs != null )
{
for ( String arg : compilerArgs )
{
compilerConfiguration.addCompilerCustomArgument( arg, null );
}
}
}
// ----------------------------------------------------------------------
// Dump configuration
// ----------------------------------------------------------------------
if ( getLog().isDebugEnabled() )
{
getLog().debug( "Classpath:" );
for ( String s : getClasspathElements() )
{
getLog().debug( " " + s );
}
if ( !getModulepathElements().isEmpty() )
{
getLog().debug( "Modulepath:" );
for ( String s : getModulepathElements() )
{
getLog().debug( " " + s );
}
}
getLog().debug( "Source roots:" );
for ( String root : getCompileSourceRoots() )
{
getLog().debug( " " + root );
}
try
{
if ( fork )
{
if ( compilerConfiguration.getExecutable() != null )
{
getLog().debug( "Excutable: " );
getLog().debug( " " + compilerConfiguration.getExecutable() );
}
}
String[] cl = compiler.createCommandLine( compilerConfiguration );
if ( cl != null && cl.length > 0 )
{
StringBuilder sb = new StringBuilder();
sb.append( cl[0] );
for ( int i = 1; i < cl.length; i++ )
{
sb.append( " " );
sb.append( cl[i] );
}
getLog().debug( "Command line options:" );
getLog().debug( sb );
}
}
catch ( CompilerException ce )
{
getLog().debug( ce );
}
}
List<String> jpmsLines = new ArrayList<>();
// See http://openjdk.java.net/jeps/261
final List<String> runtimeArgs = Arrays.asList( "--upgrade-module-path",
"--add-exports",
"--add-reads",
"--add-modules",
"--limit-modules" );
// Custom arguments are all added as keys to an ordered Map
Iterator<Map.Entry<String, String>> entryIter =
compilerConfiguration.getCustomCompilerArgumentsEntries().iterator();
while ( entryIter.hasNext() )
{
Map.Entry<String, String> entry = entryIter.next();
if ( runtimeArgs.contains( entry.getKey() ) )
{
jpmsLines.add( entry.getKey() );
String value = entry.getValue();
if ( value == null )
{
entry = entryIter.next();
value = entry.getKey();
}
jpmsLines.add( value );
}
else if ( "--patch-module".equals( entry.getKey() ) )
{
String value = entry.getValue();
if ( value == null )
{
entry = entryIter.next();
value = entry.getKey();
}
String[] values = value.split( "=" );
StringBuilder patchModule = new StringBuilder( values[0] );
patchModule.append( '=' );
Set<String> patchModules = new LinkedHashSet<>();
Set<Path> sourceRoots = new HashSet<>( getCompileSourceRoots().size() );
for ( String sourceRoot : getCompileSourceRoots() )
{
sourceRoots.add( Paths.get( sourceRoot ) );
}
String[] files = values[1].split( PS );
for ( String file : files )
{
Path filePath = Paths.get( file );
if ( getOutputDirectory().toPath().equals( filePath ) )
{
patchModules.add( "_" ); // this jar
}
else if ( getOutputDirectory().toPath().startsWith( filePath ) )
{
// multirelease, can be ignored
continue;
}
else if ( sourceRoots.contains( filePath ) )
{
patchModules.add( "_" ); // this jar
}
else
{
JavaModuleDescriptor descriptor = getPathElements().get( file );
if ( descriptor == null )
{
if ( Files.isDirectory( filePath ) )
{
patchModules.add( file );
}
else
{
getLog().warn( "Can't locate " + file );
}
}
else if ( !values[0].equals( descriptor.name() ) )
{
patchModules.add( descriptor.name() );
}
}
}
StringBuilder sb = new StringBuilder();
if ( !patchModules.isEmpty() )
{
for ( String mod : patchModules )
{
if ( sb.length() > 0 )
{
sb.append( ", " );
}
// use 'invalid' separator to ensure values are transformed
sb.append( mod );
}
jpmsLines.add( "--patch-module" );
jpmsLines.add( patchModule + sb.toString() );
}
}
}
if ( !jpmsLines.isEmpty() )
{
Path jpmsArgs = Paths.get( getOutputDirectory().getAbsolutePath(), "META-INF/jpms.args" );
try
{
Files.createDirectories( jpmsArgs.getParent() );
Files.write( jpmsArgs, jpmsLines, Charset.defaultCharset() );
}
catch ( IOException e )
{
getLog().warn( e.getMessage() );
}
}
// ----------------------------------------------------------------------
// Compile!
// ----------------------------------------------------------------------
if ( StringUtils.isEmpty( compilerConfiguration.getSourceEncoding() ) )
{
getLog().warn( "File encoding has not been set, using platform encoding " + ReaderFactory.FILE_ENCODING
+ ", i.e. build is platform dependent!" );
}
CompilerResult compilerResult;
if ( useIncrementalCompilation )
{
incrementalBuildHelperRequest.outputDirectory( getOutputDirectory() );
incrementalBuildHelper.beforeRebuildExecution( incrementalBuildHelperRequest );
getLog().debug( "incrementalBuildHelper#beforeRebuildExecution" );
}
try
{
try
{
compilerResult = compiler.performCompile( compilerConfiguration );
}
catch ( CompilerNotImplementedException cnie )
{
List<CompilerError> messages = compiler.compile( compilerConfiguration );
compilerResult = convertToCompilerResult( messages );
}
}
catch ( Exception e )
{
// TODO: don't catch Exception
throw new MojoExecutionException( "Fatal error compiling", e );
}
if ( createMissingPackageInfoClass && compilerResult.isSuccess()
&& compiler.getCompilerOutputStyle() == CompilerOutputStyle.ONE_OUTPUT_FILE_PER_INPUT_FILE )
{
try
{
SourceMapping sourceMapping = getSourceMapping( compilerConfiguration, compiler );
createMissingPackageInfoClasses( compilerConfiguration, sourceMapping, sources );
}
catch ( Exception e )
{
getLog().warn( "Error creating missing package info classes", e );
}
}
if ( useIncrementalCompilation )
{
if ( incrementalBuildHelperRequest.getOutputDirectory().exists() )
{
getLog().debug( "incrementalBuildHelper#afterRebuildExecution" );
// now scan the same directory again and create a diff
incrementalBuildHelper.afterRebuildExecution( incrementalBuildHelperRequest );
}
else
{
getLog().debug(
"skip incrementalBuildHelper#afterRebuildExecution as the output directory doesn't exist" );
}
}
List<CompilerMessage> warnings = new ArrayList<>();
List<CompilerMessage> errors = new ArrayList<>();
List<CompilerMessage> others = new ArrayList<>();
for ( CompilerMessage message : compilerResult.getCompilerMessages() )
{
if ( message.getKind() == CompilerMessage.Kind.ERROR )
{
errors.add( message );
}
else if ( message.getKind() == CompilerMessage.Kind.WARNING
|| message.getKind() == CompilerMessage.Kind.MANDATORY_WARNING )
{
warnings.add( message );
}
else
{
others.add( message );
}
}
if ( failOnError && !compilerResult.isSuccess() )
{
for ( CompilerMessage message : others )
{
assert message.getKind() != CompilerMessage.Kind.ERROR
&& message.getKind() != CompilerMessage.Kind.WARNING
&& message.getKind() != CompilerMessage.Kind.MANDATORY_WARNING;
getLog().info( message.toString() );
}
if ( !warnings.isEmpty() )
{
getLog().info( "-------------------------------------------------------------" );
getLog().warn( "COMPILATION WARNING : " );
getLog().info( "-------------------------------------------------------------" );
for ( CompilerMessage warning : warnings )
{
getLog().warn( warning.toString() );
}
getLog().info( warnings.size() + ( ( warnings.size() > 1 ) ? " warnings " : " warning" ) );
getLog().info( "-------------------------------------------------------------" );
}
if ( !errors.isEmpty() )
{
getLog().info( "-------------------------------------------------------------" );
getLog().error( "COMPILATION ERROR : " );
getLog().info( "-------------------------------------------------------------" );
for ( CompilerMessage error : errors )
{
getLog().error( error.toString() );
}
getLog().info( errors.size() + ( ( errors.size() > 1 ) ? " errors " : " error" ) );
getLog().info( "-------------------------------------------------------------" );
}
if ( !errors.isEmpty() )
{
throw new CompilationFailureException( errors );
}
else
{
throw new CompilationFailureException( warnings );
}
}
else
{
for ( CompilerMessage message : compilerResult.getCompilerMessages() )
{
switch ( message.getKind() )
{
case NOTE:
case OTHER:
getLog().info( message.toString() );
break;
case ERROR:
getLog().error( message.toString() );
break;
case MANDATORY_WARNING:
case WARNING:
default:
getLog().warn( message.toString() );
break;
}
}
}
}
private void createMissingPackageInfoClasses( CompilerConfiguration compilerConfiguration,
SourceMapping sourceMapping,
Set<File> sources )
throws InclusionScanException, IOException
{
for ( File source : sources )
{
String path = source.toString();
if ( path.endsWith( File.separator + "package-info.java" ) )
{
for ( String root : getCompileSourceRoots() )
{
root = root + File.separator;
if ( path.startsWith( root ) )
{
String rel = path.substring( root.length() );
Set<File> files = sourceMapping.getTargetFiles( getOutputDirectory(), rel );
for ( File file : files )
{
if ( !file.exists() )
{
File parentFile = file.getParentFile();
if ( !parentFile.exists() )
{
Files.createDirectories( parentFile.toPath() );
}
byte[] bytes = generatePackage( compilerConfiguration, rel );
Files.write( file.toPath(), bytes );
}
}
}
}
}
}
}
private byte[] generatePackage( CompilerConfiguration compilerConfiguration, String javaFile )
{
int version = getOpcode( compilerConfiguration );
String internalPackageName = javaFile.substring( 0, javaFile.length() - ".java".length() );
if ( File.separatorChar != '/' )
{
internalPackageName = internalPackageName.replace( File.separatorChar, '/' );
}
ClassWriter cw = new ClassWriter( 0 );
cw.visit( version,
Opcodes.ACC_SYNTHETIC | Opcodes.ACC_ABSTRACT | Opcodes.ACC_INTERFACE,
internalPackageName, null, "java/lang/Object", null );
cw.visitSource( "package-info.java", null );
return cw.toByteArray();
}
private int getOpcode( CompilerConfiguration compilerConfiguration )
{
String version = compilerConfiguration.getReleaseVersion();
if ( version == null )
{
version = compilerConfiguration.getTargetVersion();
if ( version == null )
{
version = "1.5";
}
}
if ( version.startsWith( "1." ) )
{
version = version.substring( 2 );
}
int iVersion = Integer.parseInt( version );
if ( iVersion < 2 )
{
throw new IllegalArgumentException( "Unsupported java version '" + version + "'" );
}
return iVersion - 2 + Opcodes.V1_2;
}
protected boolean isTestCompile()
{
return false;
}
protected CompilerResult convertToCompilerResult( List<CompilerError> compilerErrors )
{
if ( compilerErrors == null )
{
return new CompilerResult();
}
List<CompilerMessage> messages = new ArrayList<>( compilerErrors.size() );
boolean success = true;
for ( CompilerError compilerError : compilerErrors )
{
messages.add(
new CompilerMessage( compilerError.getFile(), compilerError.getKind(), compilerError.getStartLine(),
compilerError.getStartColumn(), compilerError.getEndLine(),
compilerError.getEndColumn(), compilerError.getMessage() ) );
if ( compilerError.isError() )
{
success = false;
}
}
return new CompilerResult( success, messages );
}
/**
* @return all source files for the compiler
*/
private Set<File> getCompileSources( Compiler compiler, CompilerConfiguration compilerConfiguration )
throws MojoExecutionException, CompilerException
{
String inputFileEnding = compiler.getInputFileEnding( compilerConfiguration );
if ( StringUtils.isEmpty( inputFileEnding ) )
{
// see MCOMPILER-199 GroovyEclipseCompiler doesn't set inputFileEnding
// so we can presume it's all files from the source directory
inputFileEnding = ".*";
}
SourceInclusionScanner scanner = getSourceInclusionScanner( inputFileEnding );
SourceMapping mapping = getSourceMapping( compilerConfiguration, compiler );
scanner.addSourceMapping( mapping );
Set<File> compileSources = new HashSet<>();
for ( String sourceRoot : getCompileSourceRoots() )
{
File rootFile = new File( sourceRoot );
if ( !rootFile.isDirectory()
|| rootFile.getAbsoluteFile().equals( compilerConfiguration.getGeneratedSourcesDirectory() ) )
{
continue;
}
try
{
compileSources.addAll( scanner.getIncludedSources( rootFile, null ) );
}
catch ( InclusionScanException e )
{
throw new MojoExecutionException(
"Error scanning source root: \'" + sourceRoot + "\' for stale files to recompile.", e );
}
}
return compileSources;
}
protected abstract Set<String> getIncludes();
protected abstract Set<String> getExcludes();
/**
* @param compilerConfiguration
* @param compiler
* @return <code>true</code> if at least a single source file is newer than it's class file
*/
private boolean isSourceChanged( CompilerConfiguration compilerConfiguration, Compiler compiler )
throws CompilerException, MojoExecutionException
{
Set<File> staleSources =
computeStaleSources( compilerConfiguration, compiler, getSourceInclusionScanner( staleMillis ) );
if ( getLog().isDebugEnabled() )
{
for ( File f : staleSources )
{
getLog().debug( "Stale source detected: " + f.getAbsolutePath() );
}
}
return !staleSources.isEmpty();
}
/**
* try to get thread count if a Maven 3 build, using reflection as the plugin must not be maven3 api dependent
*
* @return number of thread for this build or 1 if not multi-thread build
*/
protected int getRequestThreadCount()
{
try
{
Method getRequestMethod = session.getClass().getMethod( "getRequest" );
Object mavenExecutionRequest = getRequestMethod.invoke( this.session );
Method getThreadCountMethod = mavenExecutionRequest.getClass().getMethod( "getThreadCount" );
String threadCount = (String) getThreadCountMethod.invoke( mavenExecutionRequest );
return Integer.parseInt( threadCount );
}
catch ( Exception e )
{
getLog().debug( "unable to get threadCount for the current build: " + e.getMessage() );
}
return 1;
}
protected Date getBuildStartTime()
{
Date buildStartTime = null;
try
{
Method getRequestMethod = session.getClass().getMethod( "getRequest" );
Object mavenExecutionRequest = getRequestMethod.invoke( session );
Method getStartTimeMethod = mavenExecutionRequest.getClass().getMethod( "getStartTime" );
buildStartTime = (Date) getStartTimeMethod.invoke( mavenExecutionRequest );
}
catch ( Exception e )
{
getLog().debug( "unable to get start time for the current build: " + e.getMessage() );
}
if ( buildStartTime == null )
{
return new Date();
}
return buildStartTime;
}
private String getMemoryValue( String setting )
{
String value = null;
// Allow '128' or '128m'
if ( isDigits( setting ) )
{
value = setting + "m";
}
else if ( ( isDigits( setting.substring( 0, setting.length() - 1 ) ) )
&& ( setting.toLowerCase().endsWith( "m" ) ) )
{
value = setting;
}
return value;
}
//TODO remove the part with ToolchainManager lookup once we depend on
//3.0.9 (have it as prerequisite). Define as regular component field then.
protected final Toolchain getToolchain()
{
Toolchain tc = null;
if ( jdkToolchain != null )
{
// Maven 3.3.1 has plugin execution scoped Toolchain Support
try
{
Method getToolchainsMethod =
toolchainManager.getClass().getMethod( "getToolchains", MavenSession.class, String.class,
Map.class );
@SuppressWarnings( "unchecked" )
List<Toolchain> tcs =
(List<Toolchain>) getToolchainsMethod.invoke( toolchainManager, session, "jdk",
jdkToolchain );
if ( tcs != null && !tcs.isEmpty() )
{
tc = tcs.get( 0 );
}
}
catch ( NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException
| InvocationTargetException e )
{
// ignore
}
}
if ( tc == null )
{
tc = toolchainManager.getToolchainFromBuildContext( "jdk", session );
}
return tc;
}
private boolean isDigits( String string )
{
for ( int i = 0; i < string.length(); i++ )
{
if ( !Character.isDigit( string.charAt( i ) ) )
{
return false;
}
}
return true;
}
private Set<File> computeStaleSources( CompilerConfiguration compilerConfiguration, Compiler compiler,
SourceInclusionScanner scanner )
throws MojoExecutionException, CompilerException
{
SourceMapping mapping = getSourceMapping( compilerConfiguration, compiler );
File outputDirectory;
CompilerOutputStyle outputStyle = compiler.getCompilerOutputStyle();
if ( outputStyle == CompilerOutputStyle.ONE_OUTPUT_FILE_FOR_ALL_INPUT_FILES )
{
outputDirectory = buildDirectory;
}
else
{
outputDirectory = getOutputDirectory();
}
scanner.addSourceMapping( mapping );
Set<File> staleSources = new HashSet<>();
for ( String sourceRoot : getCompileSourceRoots() )
{
File rootFile = new File( sourceRoot );
if ( !rootFile.isDirectory() )
{
continue;
}
try
{
staleSources.addAll( scanner.getIncludedSources( rootFile, outputDirectory ) );
}
catch ( InclusionScanException e )
{
throw new MojoExecutionException(
"Error scanning source root: \'" + sourceRoot + "\' for stale files to recompile.", e );
}
}
return staleSources;
}
private SourceMapping getSourceMapping( CompilerConfiguration compilerConfiguration, Compiler compiler )
throws CompilerException, MojoExecutionException
{
CompilerOutputStyle outputStyle = compiler.getCompilerOutputStyle();
SourceMapping mapping;
if ( outputStyle == CompilerOutputStyle.ONE_OUTPUT_FILE_PER_INPUT_FILE )
{
mapping = new SuffixMapping( compiler.getInputFileEnding( compilerConfiguration ),
compiler.getOutputFileEnding( compilerConfiguration ) );
}
else if ( outputStyle == CompilerOutputStyle.ONE_OUTPUT_FILE_FOR_ALL_INPUT_FILES )
{
mapping = new SingleTargetSourceMapping( compiler.getInputFileEnding( compilerConfiguration ),
compiler.getOutputFile( compilerConfiguration ) );
}
else
{
throw new MojoExecutionException( "Unknown compiler output style: '" + outputStyle + "'." );
}
return mapping;
}
/**
* @todo also in ant plugin. This should be resolved at some point so that it does not need to
* be calculated continuously - or should the plugins accept empty source roots as is?
*/
private static List<String> removeEmptyCompileSourceRoots( List<String> compileSourceRootsList )
{
List<String> newCompileSourceRootsList = new ArrayList<>();
if ( compileSourceRootsList != null )
{
// copy as I may be modifying it
for ( String srcDir : compileSourceRootsList )
{
if ( !newCompileSourceRootsList.contains( srcDir ) && new File( srcDir ).exists() )
{
newCompileSourceRootsList.add( srcDir );
}
}
}
return newCompileSourceRootsList;
}
/**
* We just compare the timestamps of all local dependency files (inter-module dependency classpath) and the own
* generated classes and if we got a file which is &gt;= the build-started timestamp, then we caught a file which
* got changed during this build.
*
* @return <code>true</code> if at least one single dependency has changed.
*/
protected boolean isDependencyChanged()
{
if ( session == null )
{
// we just cannot determine it, so don't do anything beside logging
getLog().info( "Cannot determine build start date, skipping incremental build detection." );
return false;
}
if ( fileExtensions == null || fileExtensions.isEmpty() )
{
fileExtensions = Collections.unmodifiableList( Arrays.asList( "class", "jar" ) );
}
Date buildStartTime = getBuildStartTime();
List<String> pathElements = new ArrayList<>();
pathElements.addAll( getClasspathElements() );
pathElements.addAll( getModulepathElements() );
for ( String pathElement : pathElements )
{
File artifactPath = new File( pathElement );
if ( artifactPath.isDirectory() || artifactPath.isFile() )
{
if ( hasNewFile( artifactPath, buildStartTime ) )
{
getLog().debug( "New dependency detected: " + artifactPath.getAbsolutePath() );
return true;
}
}
}
// obviously there was no new file detected.
return false;
}
/**
* @param classPathEntry entry to check
* @param buildStartTime time build start
* @return if any changes occurred
*/
private boolean hasNewFile( File classPathEntry, Date buildStartTime )
{
if ( !classPathEntry.exists() )
{
return false;
}
if ( classPathEntry.isFile() )
{
return classPathEntry.lastModified() >= buildStartTime.getTime()
&& fileExtensions.contains( FileUtils.getExtension( classPathEntry.getName() ) );
}
File[] children = classPathEntry.listFiles();
for ( File child : children )
{
if ( hasNewFile( child, buildStartTime ) )
{
return true;
}
}
return false;
}
private List<String> resolveProcessorPathEntries()
throws MojoExecutionException
{
if ( annotationProcessorPaths == null || annotationProcessorPaths.isEmpty() )
{
return null;
}
try
{
Set<String> elements = new LinkedHashSet<>();
for ( DependencyCoordinate coord : annotationProcessorPaths )
{
ArtifactHandler handler = artifactHandlerManager.getArtifactHandler( coord.getType() );
Artifact artifact = new DefaultArtifact(
coord.getGroupId(),
coord.getArtifactId(),
VersionRange.createFromVersionSpec( coord.getVersion() ),
Artifact.SCOPE_RUNTIME,
coord.getType(),
coord.getClassifier(),
handler,
false );
ArtifactResolutionRequest request = new ArtifactResolutionRequest()
.setArtifact( artifact )
.setResolveRoot( true )
.setResolveTransitively( true )
.setLocalRepository( session.getLocalRepository() )
.setRemoteRepositories( project.getRemoteArtifactRepositories() );
ArtifactResolutionResult resolutionResult = repositorySystem.resolve( request );
resolutionErrorHandler.throwErrors( request, resolutionResult );
for ( Artifact resolved : resolutionResult.getArtifacts() )
{
elements.add( resolved.getFile().getAbsolutePath() );
}
}
return new ArrayList<>( elements );
}
catch ( Exception e )
{
throw new MojoExecutionException( "Resolution of annotationProcessorPath dependencies failed: "
+ e.getLocalizedMessage(), e );
}
}
private void writePlugin( MessageBuilder mb )
{
mb.a( " <plugin>" ).newline();
mb.a( " <groupId>org.apache.maven.plugins</groupId>" ).newline();
mb.a( " <artifactId>maven-compiler-plugin</artifactId>" ).newline();
String version = getMavenCompilerPluginVersion();
if ( version != null )
{
mb.a( " <version>" ).a( version ).a( "</version>" ).newline();
}
writeConfig( mb );
mb.a( " </plugin>" ).newline();
}
private void writeConfig( MessageBuilder mb )
{
mb.a( " <configuration>" ).newline();
if ( release != null )
{
mb.a( " <release>" ).a( release ).a( "</release>" ).newline();
}
else if ( JavaVersion.JAVA_VERSION.isAtLeast( "9" ) )
{
String rls = target.replaceAll( ".\\.", "" );
// when using Java9+, motivate to use release instead of source/target
mb.a( " <release>" ).a( rls ).a( "</release>" ).newline();
}
else
{
mb.a( " <source>" ).a( source ).a( "</source>" ).newline();
mb.a( " <target>" ).a( target ).a( "</target>" ).newline();
}
mb.a( " </configuration>" ).newline();
}
private String getMavenCompilerPluginVersion()
{
Properties pomProperties = new Properties();
try ( InputStream is = AbstractCompilerMojo.class
.getResourceAsStream( "/META-INF/maven/org.apache.maven.plugins/maven-compiler-plugin/pom.properties" ) )
{
if ( is != null )
{
pomProperties.load( is );
}
}
catch ( IOException e )
{
// noop
}
return pomProperties.getProperty( "version" );
}
public void setTarget( String target )
{
this.target = target;
targetOrReleaseSet = true;
}
public void setRelease( String release )
{
this.release = release;
targetOrReleaseSet = true;
}
final String getImplicit()
{
return implicit;
}
}