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AbstractCompilerMojo.java
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AbstractCompilerMojo.java
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/*
* 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:https://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.
*/
package org.apache.maven.plugin.compiler;
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.time.Instant;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
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.Objects;
import java.util.Optional;
import java.util.Properties;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.maven.RepositoryUtils;
import org.apache.maven.artifact.handler.ArtifactHandler;
import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.model.Dependency;
import org.apache.maven.model.DependencyManagement;
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.shared.incremental.IncrementalBuildHelper;
import org.apache.maven.shared.incremental.IncrementalBuildHelperRequest;
import org.apache.maven.shared.utils.StringUtils;
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.CompilerException;
import org.codehaus.plexus.compiler.CompilerMessage;
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.codehaus.plexus.util.FileUtils;
import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.artifact.ArtifactTypeRegistry;
import org.eclipse.aether.artifact.DefaultArtifact;
import org.eclipse.aether.collection.CollectRequest;
import org.eclipse.aether.graph.Exclusion;
import org.eclipse.aether.resolution.DependencyRequest;
import org.eclipse.aether.resolution.DependencyResult;
import org.eclipse.aether.util.artifact.JavaScopes;
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:[email protected]">Trygve Laugstøl</a>
* @since 2.0
*/
public abstract class AbstractCompilerMojo extends AbstractMojo {
protected static final String PS = System.getProperty("path.separator");
private static final String INPUT_FILES_LST_FILENAME = "inputFiles.lst";
static final String DEFAULT_SOURCE = "1.8";
static final String DEFAULT_TARGET = "1.8";
// 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.
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-g">javac -g</a>
* @see #debuglevel
*/
@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
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-parameters">javac -parameters</a>
*/
@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
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-enable-preview">javac --enable-preview</a>
*/
@Parameter(property = "maven.compiler.enablePreview", defaultValue = "false")
private boolean enablePreview;
/**
* Set to <code>true</code> to show messages about what the compiler is doing.
*
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-verbose">javac -verbose</a>
*/
@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>false</code> to disable warnings during compilation.
*/
@Parameter(property = "maven.compiler.showWarnings", defaultValue = "true")
private boolean showWarnings;
/**
* <p>The {@code -source} argument for the Java compiler.</p>
*
* <p><b>NOTE: </b></p>
* <p>Since 3.8.0 the default value has changed from 1.5 to 1.6</p>
* <p>Since 3.9.0 the default value has changed from 1.6 to 1.7</p>
* <p>Since 3.11.0 the default value has changed from 1.7 to 1.8</p>
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-source">javac -source</a>
*/
@Parameter(property = "maven.compiler.source", defaultValue = DEFAULT_SOURCE)
protected String source;
/**
* <p>The {@code -target} argument for the Java compiler.</p>
*
* <p><b>NOTE: </b></p>
* <p>Since 3.8.0 the default value has changed from 1.5 to 1.6</p>
* <p>Since 3.9.0 the default value has changed from 1.6 to 1.7</p>
* <p>Since 3.11.0 the default value has changed from 1.7 to 1.8</p>
*
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-target">javac -target</a>
*/
@Parameter(property = "maven.compiler.target", defaultValue = DEFAULT_TARGET)
protected String target;
/**
* The {@code -release} argument for the Java compiler, supported since Java9
*
* @since 3.6
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-release">javac -release</a>
*/
@Parameter(property = "maven.compiler.release")
protected String release;
/**
* The {@code -encoding} argument for the Java compiler.
*
* @since 2.1
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-encoding">javac -encoding</a>
*/
@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>.
* @deprecated This parameter is no longer evaluated by the underlying compilers, instead the actual
* version of the {@code javac} binary is automatically retrieved.
*/
@Deprecated
@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>
* <li><code>full</code> - annotation processing and compilation.</li>
* </ul>
*
* <code>full</code> is the default. Starting with JDK 21, this option must be set explicitly.
*
* @since 2.2
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-proc">javac -proc</a>
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#annotation-processing">javac Annotation Processing</a>
*/
@Parameter(property = "maven.compiler.proc")
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
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-processor">javac -processor</a>
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#annotation-processing">javac Annotation Processing</a>
*/
@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. Exclusions are supported as well. Example:
* </p>
*
* <pre>
* <configuration>
* <annotationProcessorPaths>
* <path>
* <groupId>org.sample</groupId>
* <artifactId>sample-annotation-processor</artifactId>
* <version>1.2.3</version> <!-- Optional - taken from dependency management if not specified -->
* <!-- Optionally exclude transitive dependencies -->
* <exclusions>
* <exclusion>
* <groupId>org.sample</groupId>
* <artifactId>sample-dependency</artifactId>
* </exclusion>
* </exclusions>
* </path>
* <!-- ... more ... -->
* </annotationProcessorPaths>
* </configuration>
* </pre>
*
* <b>Note:</b> Exclusions are supported from version 3.11.0.
*
* @since 3.5
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-processor-path">javac -processorpath</a>
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#annotation-processing">javac Annotation Processing</a>
*
*/
@Parameter
private List<DependencyCoordinate> annotationProcessorPaths;
/**
* <p>
* Whether to use the Maven dependency management section when resolving transitive dependencies of annotation
* processor paths.
* </p>
* <p>
* This flag does not enable / disable the ability to resolve the version of annotation processor paths
* from dependency management section. It only influences the resolution of transitive dependencies of those
* top-level paths.
* </p>
*
* @since 3.12.0
*/
@Parameter(defaultValue = "false")
private boolean annotationProcessorPathsUseDepMgmt;
/**
* <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>
* <compilerArguments>
* <Xmaxerrs>1000</Xmaxerrs>
* <Xlint/>
* <Xlint:-path/>
* <Averbose>true</Averbose>
* </compilerArguments>
* </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>
* <compilerArgs>
* <arg>-Xmaxerrs</arg>
* <arg>1000</arg>
* <arg>-Xlint</arg>
* <arg>-J-Duser.language=en_us</arg>
* </compilerArgs>
* </pre>
*
* @since 3.1
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-J">javac -J</a>
*/
@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 #compilerArgs}.
* </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>
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-J">javac -J</a>
*/
@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 {@link #debug} is not turned on, this attribute will be ignored.
*
* @since 2.1
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-g-custom">javac -G:[lines,vars,source]</a>
*/
@Parameter(property = "maven.compiler.debuglevel")
private String debuglevel;
/**
* Keyword to be appended to the <code>-implicit:</code> command-line switch.
*
* @since 3.10.2
* @see <a href="https://docs.oracle.com/en/java/javase/17/docs/specs/man/javac.html#option-implicit">javac -implicit</a>
*/
@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>
* <configuration>
* <jdkToolchain>
* <version>11</version>
* </jdkToolchain>
* ...
* </configuration>
*
* <configuration>
* <jdkToolchain>
* <version>1.8</version>
* <vendor>zulu</vendor>
* </jdkToolchain>
* ...
* </configuration>
* </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 = "${reuseCreated}", property = "maven.compiler.compilerReuseStrategy")
private String compilerReuseStrategy = "reuseCreated";
/**
* @since 2.5
*/
@Parameter(defaultValue = "false", property = "maven.compiler.skipMultiThreadWarning")
private boolean skipMultiThreadWarning;
/**
* Legacy parameter name of {@link #forceLegacyJavacApi}. Only considered if {@link #forceLegacyJavacApi} is
* not set or {@code false}.
* @since 3.0
* @deprecated Use {@link #forceLegacyJavacApi} instead
*/
@Deprecated
@Parameter(defaultValue = "false", property = "maven.compiler.forceJavacCompilerUse")
private boolean forceJavacCompilerUse;
/**
* The underlying compiler now uses <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.compiler/javax/tools/package-summary.html">{@code javax.tools} API</a>
* if available in your current JDK.
* Set this to {@code true} to always use the legacy <a href="https://docs.oracle.com/en/java/javase/17/docs/api/jdk.compiler/com/sun/tools/javac/package-summary.html">
* {@code com.sun.tools.javac} API</a> instead.
* <p>
* <em>This only has an effect for {@link #compilerId} being {@code javac} and {@link #fork} being {@code false}</em>.
*
* @since 3.13
*/
@Parameter(defaultValue = "false", property = "maven.compiler.forceLegacyJavacApi")
private boolean forceLegacyJavacApi;
/**
* @since 3.0 needed for storing the status for the incremental build support.
*/
@Parameter(defaultValue = "${mojoExecution}", readonly = true, required = true)
private MojoExecution mojoExecution;
/**
* File extensions to check timestamp for incremental build.
*
* @since 3.1
*/
@Parameter(defaultValue = "class,jar")
private Set<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;
@Parameter(defaultValue = "false", property = "maven.compiler.showCompilationChanges")
private boolean showCompilationChanges = false;
/**
* Timestamp for reproducible output archive entries, either formatted as ISO 8601
* <code>yyyy-MM-dd'T'HH:mm:ssXXX</code> or as an int representing seconds since the epoch (like
* <a href="https://reproducible-builds.org/docs/source-date-epoch/">SOURCE_DATE_EPOCH</a>).
* @since 3.12.0
*/
@Parameter(defaultValue = "${project.build.outputTimestamp}")
private String outputTimestamp;
/**
* Resolves the artifacts needed.
*/
@Component
private RepositorySystem repositorySystem;
/**
* Artifact handler manager.
*/
@Component
private ArtifactHandlerManager artifactHandlerManager;
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;
}
protected final Optional<Path> getModuleDeclaration(final Set<File> sourceFiles) {
for (File sourceFile : sourceFiles) {
if ("module-info.java".equals(sourceFile.getName())) {
return Optional.of(sourceFile.toPath());
}
}
return Optional.empty();
}
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 && (debuglevel != null && !debuglevel.isEmpty())) {
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);
if (failOnWarning && !showWarnings) {
getLog().warn("The property failOnWarning is set to true, but showWarnings is set to false.");
getLog().warn("With compiler's warnings silenced the failOnWarning has no effect.");
}
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 (!(meminitial == null || meminitial.isEmpty())) {
String value = getMemoryValue(meminitial);
if (value != null) {
compilerConfiguration.setMeminitial(value);
} else {
getLog().info("Invalid value for meminitial '" + meminitial + "'. Ignoring this option.");
}
}
if (!(maxmem == null || maxmem.isEmpty())) {
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(forceLegacyJavacApi || 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);
// Strategies used to detect modifications.
String immutableOutputFile = (compiler.getCompilerOutputStyle()
.equals(CompilerOutputStyle.ONE_OUTPUT_FILE_FOR_ALL_INPUT_FILES)
&& !canUpdateTarget)
? "immutable single output file"
: null;
String dependencyChanged = isDependencyChanged() ? "changed dependency" : null;
String sourceChanged = isSourceChanged(compilerConfiguration, compiler) ? "changed source code" : null;
String inputFileTreeChanged = hasInputFileTreeChanged(incrementalBuildHelper, sources)
? "added or removed source files"
: null;
// Get the first cause for the rebuild compilation detection.
String cause = Stream.of(immutableOutputFile, dependencyChanged, sourceChanged, inputFileTreeChanged)
.filter(Objects::nonNull)
.findFirst()
.orElse(null);
if (cause != null) {
getLog().info("Recompiling the module because of "
+ MessageUtils.buffer().strong(cause) + ".");
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 {