org.apache.maven.plugin.compiler.AbstractCompilerMojo Maven / Gradle / Ivy
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The Compiler Plugin is used to compile the sources of your project.
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 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.shared.incremental.IncrementalBuildHelper;
import org.apache.maven.shared.utils.ReaderFactory;
import org.apache.maven.shared.utils.StringUtils;
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 java.io.File;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* 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 Trygve Laugstøl
* @version $Id: AbstractCompilerMojo.java 1410034 2012-11-15 21:40:58Z olamy $
* @since 2.0
*/
public abstract class AbstractCompilerMojo
extends AbstractMojo
{
// ----------------------------------------------------------------------
// 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;
/**
* Set to true to include debugging information in the compiled class files.
*/
@Parameter ( property = "maven.compiler.debug", defaultValue = "true" )
private boolean debug = true;
/**
* Set to true 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 true to optimize the compiled code using the compiler's optimization methods.
*/
@Parameter ( property = "maven.compiler.optimize", defaultValue = "false" )
private boolean optimize;
/**
* Set to true to show compilation warnings.
*/
@Parameter ( property = "maven.compiler.showWarnings", defaultValue = "false" )
private boolean showWarnings;
/**
* The -source argument for the Java compiler.
*/
@Parameter ( property = "maven.compiler.source", defaultValue = "1.5" )
protected String source;
/**
* The -target argument for the Java compiler.
*/
@Parameter ( property = "maven.compiler.target", defaultValue = "1.5" )
protected String target;
/**
* 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
* guide 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 true.
*/
@Parameter ( property = "maven.compiler.compilerVersion" )
private String compilerVersion;
/**
* Allows running the compiler in a separate process.
* If false it uses the built in compiler, while if true 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 true.
*
* @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 true.
*
* @since 2.0.1
*/
@Parameter ( property = "maven.compiler.maxmem" )
private String maxmem;
/**
* Sets the executable of the compiler to use when {@link #fork} is true.
*/
@Parameter ( property = "maven.compiler.executable" )
private String executable;
/**
*
* 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.
*
* Allowed values are:
*
* none - no annotation processing is performed.only - only annotation processing is done, no compilation.
*
* @since 2.2
*/
@Parameter
private String proc;
/**
*
* Names of annotation processors to run. Only applies to JDK 1.6+
* If not set, the default annotation processors discovery process applies.
*
*
* @since 2.2
*/
@Parameter
private String[] annotationProcessors;
/**
*
* Sets the arguments to be passed to the compiler (prepending a dash) if {@link #fork} is set to true.
*
*
* This is because the list of valid arguments passed to a Java compiler
* varies based on the compiler version.
*
*
* To pass -Xmaxerrs 1000 -Xlint -Xlint:-path -Averbose=true you should include the following:
*
*
* <compilerArguments>
* <Xmaxerrs>1000</Xmaxerrs>
* <Xlint/>
* <Xlint:-path/>
* <Averbose>true</Averbose>
* </compilerArguments>
*
*
* @since 2.0.1
*/
@Parameter
protected Map compilerArguments;
/**
*
* Sets the unformatted single argument string to be passed to the compiler if {@link #fork} is set to true.
* To pass multiple arguments such as -Xmaxerrs 1000 (which are actually two arguments) you have to use {@link #compilerArguments}.
*
*
* This is because the list of valid arguments passed to a Java compiler
* varies based on the compiler version.
*
*/
@Parameter
protected String compilerArgument;
/**
* Sets the name of the output file when compiling a set of
* sources to a single file.
*
* expression="${project.build.finalName}"
*/
@Parameter
private String outputFileName;
/**
* Keyword list to be appended to the -g command-line switch. Legal values are none or a
* comma-separated list of the following keywords: lines, vars, and source.
* If debug level is not specified, by default, nothing will be appended to -g.
* If debug is not turned on, this attribute will be ignored.
*
* @since 2.1
*/
@Parameter ( property = "maven.compiler.debuglevel" )
private String debuglevel;
/**
*
*/
@Component
private ToolchainManager toolchainManager;
// ----------------------------------------------------------------------
// 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.
*/
@Component
private MavenSession session;
/**
* Strategy to re use javacc class created:
*
* reuseCreated (default): will reuse already created but in case of multi-threaded builds,
* each thread will have its own instancereuseSame: the same Javacc class will be used for each compilation even for multi-threaded buildalwaysNew: a new Javacc class will be created for each compilation
* 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 2.6
*/
@Parameter ( defaultValue = "false", property = "maven.compiler.forceJavacCompilerUse" )
private boolean forceJavacCompilerUse;
/**
* @since 2.6 needed for storing the status for the incremental build support.
*/
@Parameter ( property = "mojoExecution" )
private MojoExecution mojoExecution;
/**
* We need this to determine the start timestamp of the build.
*
* @since 2.6
*/
@Component
protected MavenSession mavenSession;
protected abstract SourceInclusionScanner getSourceInclusionScanner( int staleMillis );
protected abstract SourceInclusionScanner getSourceInclusionScanner( String inputFileEnding );
protected abstract List getClasspathElements();
protected abstract List getCompileSourceRoots();
protected abstract File getOutputDirectory();
protected abstract String getSource();
protected abstract String getTarget();
protected abstract String getCompilerArgument();
protected abstract Map getCompilerArguments();
protected abstract File getGeneratedSourcesDirectory();
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 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 compileSourceRoots = removeEmptyCompileSourceRoots( getCompileSourceRoots() );
if ( compileSourceRoots.isEmpty() )
{
getLog().info( "No sources to compile" );
return;
}
if ( getLog().isDebugEnabled() )
{
getLog().debug( "Source directories: " + compileSourceRoots.toString().replace( ',', '\n' ) );
getLog().debug( "Classpath: " + getClasspathElements().toString().replace( ',', '\n' ) );
getLog().debug( "Output directory: " + getOutputDirectory() );
}
// ----------------------------------------------------------------------
// Create the compiler configuration
// ----------------------------------------------------------------------
CompilerConfiguration compilerConfiguration = new CompilerConfiguration();
compilerConfiguration.setOutputLocation( getOutputDirectory().getAbsolutePath() );
compilerConfiguration.setClasspathEntries( getClasspathElements() );
compilerConfiguration.setSourceLocations( compileSourceRoots );
compilerConfiguration.setOptimize( optimize );
compilerConfiguration.setDebug( debug );
if ( debug && StringUtils.isNotEmpty( debuglevel ) )
{
String[] split = StringUtils.split( debuglevel, "," );
for ( int i = 0; i < split.length; i++ )
{
if ( !( split[i].equalsIgnoreCase( "none" ) || split[i].equalsIgnoreCase( "lines" )
|| split[i].equalsIgnoreCase( "vars" ) || split[i].equalsIgnoreCase( "source" ) ) )
{
throw new IllegalArgumentException( "The specified debug level: '" + split[i] + "' is unsupported. "
+ "Legal values are 'none', 'lines', 'vars', and 'source'." );
}
}
compilerConfiguration.setDebugLevel( debuglevel );
}
compilerConfiguration.setVerbose( verbose );
compilerConfiguration.setShowWarnings( showWarnings );
compilerConfiguration.setShowDeprecation( showDeprecation );
compilerConfiguration.setSourceVersion( getSource() );
compilerConfiguration.setTargetVersion( getTarget() );
compilerConfiguration.setProc( proc );
compilerConfiguration.setGeneratedSourcesDirectory( getGeneratedSourcesDirectory() );
compilerConfiguration.setAnnotationProcessors( annotationProcessors );
compilerConfiguration.setSourceEncoding( encoding );
Map effectiveCompilerArguments = getCompilerArguments();
String effectiveCompilerArgument = getCompilerArgument();
if ( ( effectiveCompilerArguments != null ) || ( effectiveCompilerArgument != null ) )
{
LinkedHashMap cplrArgsCopy = new LinkedHashMap();
if ( effectiveCompilerArguments != null )
{
for ( Map.Entry me : effectiveCompilerArguments.entrySet() )
{
String key = me.getKey();
String value = me.getValue();
if ( !key.startsWith( "-" ) )
{
key = "-" + key;
}
if ( key.startsWith( "-A" ) && StringUtils.isNotEmpty( value ) )
{
cplrArgsCopy.put( key + "=" + value, null );
}
else
{
cplrArgsCopy.put( key, value );
}
}
}
if ( !StringUtils.isEmpty( effectiveCompilerArgument ) )
{
cplrArgsCopy.put( effectiveCompilerArgument, null );
}
compilerConfiguration.setCustomCompilerArguments( cplrArgsCopy );
}
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 )
{
StringBuilder sb = new StringBuilder(
"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." );
sb.append( System.getProperty( "line.separator" ) );
sb.append(
"If your env is fine with reuseSame, you can skip this warning with the configuration field skipMultiThreadWarning or -Dmaven.compiler.skipMultiThreadWarning=true" );
getLog().warn( sb.toString() );
}
}
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, mavenSession );
try
{
canUpdateTarget = compiler.canUpdateTarget( compilerConfiguration );
Set sources = getCompileSources( compiler, compilerConfiguration );
if ( ( compiler.getCompilerOutputStyle().equals( CompilerOutputStyle.ONE_OUTPUT_FILE_FOR_ALL_INPUT_FILES )
&& !canUpdateTarget ) || isDependencyChanged() || isSourceChanged( compilerConfiguration, compiler )
|| incrementalBuildHelper.inputFileTreeChanged( sources ) )
{
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 );
}
// ----------------------------------------------------------------------
// Dump configuration
// ----------------------------------------------------------------------
if ( getLog().isDebugEnabled() )
{
getLog().debug( "Classpath:" );
for ( String s : getClasspathElements() )
{
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 );
}
}
// ----------------------------------------------------------------------
// 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;
incrementalBuildHelper.beforeRebuildExecution( getOutputDirectory() );
try
{
try
{
compilerResult = compiler.performCompile( compilerConfiguration );
}
catch ( CompilerNotImplementedException cnie )
{
List messages = compiler.compile( compilerConfiguration );
compilerResult = convertToCompilerResult( messages );
}
}
catch ( Exception e )
{
// TODO: don't catch Exception
throw new MojoExecutionException( "Fatal error compiling", e );
}
// now scan the same directory again and create a diff
incrementalBuildHelper.afterRebuildExecution();
List warnings = new ArrayList();
List errors = new ArrayList();
for ( CompilerMessage message : compilerResult.getCompilerMessages() )
{
if ( message.isError() )
{
errors.add( message );
}
else
{
warnings.add( message );
}
}
if ( failOnError && !compilerResult.isSuccess() )
{
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() )
{
getLog().warn( message.toString() );
}
}
}
protected CompilerResult convertToCompilerResult( List compilerErrors )
{
if ( compilerErrors == null )
{
return new CompilerResult();
}
List 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 getCompileSources( Compiler compiler, CompilerConfiguration compilerConfiguration )
throws MojoExecutionException, CompilerException
{
String inputFileEnding = compiler.getInputFileEnding( compilerConfiguration );
SourceInclusionScanner scanner = getSourceInclusionScanner( inputFileEnding );
SourceMapping mapping = getSourceMapping( compilerConfiguration, compiler );
scanner.addSourceMapping( mapping );
Set compileSources = new HashSet();
for ( String sourceRoot : getCompileSourceRoots() )
{
File rootFile = new File( sourceRoot );
if ( !rootFile.isDirectory() )
{
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;
}
/**
* @param compilerConfiguration
* @param compiler
* @return true 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 staleSources =
computeStaleSources( compilerConfiguration, compiler, getSourceInclusionScanner( staleMillis ) );
return staleSources != null && staleSources.size() > 0;
}
/**
* try to get thread count if a Maven 3 build, using reflection as the plugin must not be maven3 api dependant
*
* @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.valueOf( threadCount );
}
catch ( Exception e )
{
getLog().debug( "unable to get threadCount for the current build: " + e.getMessage() );
}
return 1;
}
protected Date getBuildStartTime()
{
try
{
Method getRequestMethod = session.getClass().getMethod( "getRequest" );
Object mavenExecutionRequest = getRequestMethod.invoke( session );
Method getStartTimeMethod = mavenExecutionRequest.getClass().getMethod( "getStartTime" );
Date buildStartTime = (Date) getStartTimeMethod.invoke( mavenExecutionRequest );
return buildStartTime;
}
catch ( Exception e )
{
getLog().debug( "unable to get start time for the current build: " + e.getMessage() );
}
return new Date();
}
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.
private Toolchain getToolchain()
{
Toolchain tc = null;
if ( toolchainManager != 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 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 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 removeEmptyCompileSourceRoots( List compileSourceRootsList )
{
List 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 >= the buid-started timestamp, then we catched a file which got
* changed during this build.
*
* @return true if at least one single dependency has changed.
*/
protected boolean isDependencyChanged()
{
if ( mavenSession == 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;
}
Date buildStartTime = getBuildStartTime();
for ( String classPathElement : getClasspathElements() )
{
// ProjectArtifacts are artifacts which are available in the local project
// that's the only ones we are interested in now.
File artifactPath = new File( classPathElement );
if ( artifactPath.isDirectory() )
{
if ( hasNewFile( artifactPath, buildStartTime ) )
{
return true;
}
}
}
// obviously there was no new file detected.
return false;
}
private boolean hasNewFile( File classPathEntry, Date buildStartTime )
{
if ( !classPathEntry.exists() )
{
return false;
}
if ( classPathEntry.isFile() )
{
return classPathEntry.lastModified() >= buildStartTime.getTime();
}
File[] children = classPathEntry.listFiles();
for ( File child : children )
{
if ( hasNewFile( child, buildStartTime ) )
{
return true;
}
}
return false;
}
}
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