com.jayway.maven.plugins.android.phase04processclasses.ProguardMojo Maven / Gradle / Ivy
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Maven Plugin for Android Development
package com.jayway.maven.plugins.android.phase04processclasses;
import com.jayway.maven.plugins.android.AbstractAndroidMojo;
import com.jayway.maven.plugins.android.CommandExecutor;
import com.jayway.maven.plugins.android.ExecutionException;
import com.jayway.maven.plugins.android.config.ConfigHandler;
import com.jayway.maven.plugins.android.config.ConfigPojo;
import com.jayway.maven.plugins.android.config.PullParameter;
import com.jayway.maven.plugins.android.configuration.Proguard;
import org.apache.commons.lang.StringUtils;
import org.apache.maven.RepositoryUtils;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.sonatype.aether.util.artifact.DefaultArtifact;
import org.sonatype.aether.util.artifact.JavaScopes;
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
/**
* Processes both application and dependency classes using the ProGuard byte code obfuscator,
* minimzer, and optimizer. For more information, see https://proguard.sourceforge.net.
*
* @author Jonson
* @author Matthias Kaeppler
* @author Manfred Moser
* @author Michal Harakal
* @goal proguard
* @phase process-classes
* @requiresDependencyResolution compile
*/
public class ProguardMojo extends AbstractAndroidMojo
{
/**
*
* ProGuard configuration. ProGuard is disabled by default. Set the skip parameter to false to activate proguard.
* A complete configuartion can include any of the following:
*
*
*
* <proguard>
* <skip>true|false</skip>
* <config>proguard.cfg</config>
* <configs>
* <config>${env.ANDROID_HOME}/tools/proguard/proguard-android.txt</config>
* </configs>
* <proguardJarPath>someAbsolutePathToProguardJar</proguardJarPath>
* <filterMavenDescriptor>true|false</filterMavenDescriptor>
* <filterManifest>true|false</filterManifest>
* <jvmArguments>
* <jvmArgument>-Xms256m</jvmArgument>
* <jvmArgument>-Xmx512m</jvmArgument>
* </jvmArguments>
* </proguard>
*
*
* A good practice is to create a release profile in your POM, in which you enable ProGuard.
* ProGuard should be disabled for development builds, since it obfuscates class and field
* names, and it may interfere with test projects that rely on your application classes.
* All parameters can be overridden in profiles or the the proguard* properties. Default values apply and are
* documented with these properties.
*
*
* @parameter
*/
@ConfigPojo
protected Proguard proguard;
/**
* Whether ProGuard is enabled or not. Defaults to true.
*
* @parameter expression="${android.proguard.skip}"
* @optional
*/
private Boolean proguardSkip;
@PullParameter( defaultValue = "true" )
private Boolean parsedSkip;
/**
* Path to the ProGuard configuration file (relative to project root). Defaults to "proguard.cfg"
*
* @parameter expression="${android.proguard.config}"
* @optional
*/
private String proguardConfig;
@PullParameter( defaultValue = "proguard.cfg" )
private String parsedConfig;
/**
* Additional ProGuard configuration files (relative to project root).
*
* @parameter expression="${android.proguard.configs}"
* @optional
*/
private String[] proguardConfigs;
@PullParameter( defaultValueGetterMethod = "getDefaultProguardConfigs" )
private String[] parsedConfigs;
/**
* Path to the proguard jar and therefore version of proguard to be used. By default this will load the jar from
* the Android SDK install. Overriding it with an absolute path allows you to use a newer or custom proguard
* version..
*
* You can also reference an external Proguard version as a plugin dependency like this:
*
* <plugin>
* <groupId>com.jayway.maven.plugins.android.generation2</groupId>
* <artifactId>android-maven-plugin</artifactId>
* <dependencies>
* <dependency>
* <groupId>net.sf.proguard</groupId>
* <artifactId>proguard-base</artifactId>
* <version>4.7</version>
* </dependency>
* </dependencies>
*
*
* which will download and use Proguard 4.7 as deployed to the Central Repository.
*
* @parameter expression="${android.proguard.proguardJarPath}
* @optional
*/
private String proguardProguardJarPath;
@PullParameter( defaultValueGetterMethod = "getProguardJarPath" )
private String parsedProguardJarPath;
/**
* Path relative to the project's build directory (target) where proguard puts folowing files:
*
*
* - dump.txt
* - seeds.txt
* - usage.txt
* - mapping.txt
*
*
* You can define the directory like this:
*
* <proguard>
* <skip>false</skip>
* <config>proguard.cfg</config>
* <outputDirectory>my_proguard</outputDirectory>
* </proguard>
*
*
* Output directory is defined relatively so it could be also outside of the target directory.
*
*
* @parameter expression="${android.proguard.outputDirectory}" default-value="proguard"
* @optional
*/
private String outputDirectory;
@PullParameter( defaultValue = "proguard" )
private String parsedOutputDirectory;
/**
* Extra JVM Arguments. Using these you can e.g. increase memory for the jvm running the build.
* Defaults to "-Xmx512M".
*
* @parameter expression="${android.proguard.jvmArguments}"
* @optional
*/
private String[] proguardJvmArguments;
@PullParameter( defaultValueGetterMethod = "getDefaultJvmArguments" )
private String[] parsedJvmArguments;
/**
* If set to true will add a filter to remove META-INF/maven/* files. Defaults to false.
*
* @parameter expression="${android.proguard.filterMavenDescriptor}"
* @optional
*/
private Boolean proguardFilterMavenDescriptor;
@PullParameter( defaultValue = "true" )
private Boolean parsedFilterMavenDescriptor;
/**
* If set to true will add a filter to remove META-INF/MANIFEST.MF files. Defaults to false.
*
* @parameter expression="${android.proguard.filterManifest}"
* @optional
*/
private Boolean proguardFilterManifest;
@PullParameter( defaultValue = "true" )
private Boolean parsedFilterManifest;
/**
* If set to true JDK jars will be included as library jars and corresponding filters
* will be applied to android.jar. Defaults to true.
* @parameter expression="${android.proguard.includeJdkLibs}"
*/
private Boolean includeJdkLibs;
@PullParameter( defaultValue = "true" )
private Boolean parsedIncludeJdkLibs;
/**
* The plugin dependencies.
*
* @parameter expression="${plugin.artifacts}"
* @required
* @readonly
*/
protected List pluginDependencies;
public static final String PROGUARD_OBFUSCATED_JAR = "proguard-obfuscated.jar";
private static final Collection ANDROID_LIBRARY_EXCLUDED_FILTER = Arrays
.asList( "org/xml/**", "org/w3c/**", "java/**", "javax/**" );
private static final Collection MAVEN_DESCRIPTOR = Arrays.asList( "META-INF/maven/**" );
private static final Collection META_INF_MANIFEST = Arrays.asList( "META-INF/MANIFEST.MF" );
/**
* For Proguard is required only jar type dependencies, all other like .so or .apklib can be skipped.
*/
private static final String USED_DEPENDENCY_TYPE = "jar";
private Collection globalInJarExcludes = new HashSet();
private List artifactBlacklist = new LinkedList();
private List artifactsToShift = new LinkedList();
private List inJars = new LinkedList();
private List libraryJars = new LinkedList();
private File javaHomeDir;
private File javaLibDir;
private File altJavaLibDir;
private static class ProGuardInput
{
private String path;
private Collection excludedFilter;
public ProGuardInput( String path, Collection excludedFilter )
{
this.path = path;
this.excludedFilter = excludedFilter;
}
public String toCommandLine()
{
if ( excludedFilter != null && ! excludedFilter.isEmpty() )
{
StringBuilder sb = new StringBuilder( path );
sb.append( '(' );
for ( Iterator it = excludedFilter.iterator(); it.hasNext(); )
{
sb.append( '!' ).append( it.next() );
if ( it.hasNext() )
{
sb.append( ',' );
}
}
sb.append( ')' );
return sb.toString();
}
else
{
return "\'" + path + "\'";
}
}
}
@Override
public void execute() throws MojoExecutionException, MojoFailureException
{
ConfigHandler configHandler = new ConfigHandler( this );
configHandler.parseConfiguration();
if ( ! parsedSkip )
{
executeProguard();
}
}
private void executeProguard() throws MojoExecutionException
{
final File proguardDir = new File( project.getBuild().getDirectory(), parsedOutputDirectory );
if ( ! proguardDir.exists() && ! proguardDir.mkdir() )
{
throw new MojoExecutionException( "Cannot create proguard output directory" );
}
else
{
if ( proguardDir.exists() && ! proguardDir.isDirectory() )
{
throw new MojoExecutionException( "Non-directory exists at " + proguardDir.getAbsolutePath() );
}
}
CommandExecutor executor = CommandExecutor.Factory.createDefaultCommmandExecutor();
executor.setLogger( this.getLog() );
List commands = new ArrayList();
collectJvmArguments( commands );
commands.add( "-jar" );
commands.add( parsedProguardJarPath );
commands.add( "@" + parsedConfig );
for ( String config : parsedConfigs )
{
commands.add( "@" + config );
}
if ( proguardFile != null )
{
commands.add( "@" + proguardFile.getAbsolutePath() );
}
collectInputFiles( commands );
commands.add( "-outjars" );
commands.add( "'" + project.getBuild().getDirectory() + File.separator + PROGUARD_OBFUSCATED_JAR + "'" );
commands.add( "-dump" );
commands.add( "'" + proguardDir + File.separator + "dump.txt'" );
commands.add( "-printseeds" );
commands.add( "'" + proguardDir + File.separator + "seeds.txt'" );
commands.add( "-printusage" );
commands.add( "'" + proguardDir + File.separator + "usage.txt'" );
commands.add( "-printmapping" );
commands.add( "'" + proguardDir + File.separator + "mapping.txt'" );
final String javaExecutable = getJavaExecutable().getAbsolutePath();
getLog().info( javaExecutable + " " + commands.toString() );
try
{
executor.executeCommand( javaExecutable, commands, project.getBasedir(), false );
}
catch ( ExecutionException e )
{
throw new MojoExecutionException( "", e );
}
}
/**
* Convert the jvm arguments in parsedJvmArguments as populated by the config in format as needed by the java
* command. Also preserve backwards compatibility in terms of dashes required or not..
*
* @param commands
*/
private void collectJvmArguments( List commands )
{
if ( parsedJvmArguments != null )
{
for ( String jvmArgument : parsedJvmArguments )
{
// preserve backward compatibility allowing argument with or without dash (e.g.
// Xmx512m as well as -Xmx512m should work) (see
// http://code.google.com/p/maven-android-plugin/issues/detail?id=153)
if ( ! jvmArgument.startsWith( "-" ) )
{
jvmArgument = "-" + jvmArgument;
}
commands.add( jvmArgument );
}
}
}
private void collectInputFiles( List commands )
{
// commons-logging breaks everything horribly, so we skip it from the program
// dependencies and declare it to be a library dependency instead
skipArtifact( "commons-logging", "commons-logging", true );
collectProgramInputFiles();
for ( ProGuardInput injar : inJars )
{
commands.add( "-injars" );
commands.add( injar.toCommandLine() );
}
collectLibraryInputFiles();
for ( ProGuardInput libraryjar : libraryJars )
{
commands.add( "-libraryjars" );
commands.add( libraryjar.toCommandLine() );
}
}
/**
* Figure out the full path to the current java executable.
*
* @return the full path to the current java executable.
*/
private static File getJavaExecutable()
{
final String javaHome = System.getProperty( "java.home" );
final String slash = File.separator;
return new File( javaHome + slash + "bin" + slash + "java" );
}
private void skipArtifact( String groupId, String artifactId, boolean shiftToLibraries )
{
artifactBlacklist.add( RepositoryUtils.toArtifact( new DefaultArtifact( groupId, artifactId, null, null ) ) );
if ( shiftToLibraries )
{
artifactsToShift
.add( RepositoryUtils.toArtifact( new DefaultArtifact( groupId, artifactId, null, null ) ) );
}
}
private boolean isBlacklistedArtifact( Artifact artifact )
{
for ( Artifact artifactToSkip : artifactBlacklist )
{
if ( artifactToSkip.getGroupId().equals( artifact.getGroupId() ) && artifactToSkip.getArtifactId()
.equals( artifact.getArtifactId() ) )
{
return true;
}
}
return false;
}
private boolean isShiftedArtifact( Artifact artifact )
{
for ( Artifact artifactToShift : artifactsToShift )
{
if ( artifactToShift.getGroupId().equals( artifact.getGroupId() ) && artifactToShift.getArtifactId()
.equals( artifact.getArtifactId() ) )
{
return true;
}
}
return false;
}
private void collectProgramInputFiles()
{
if ( parsedFilterManifest )
{
globalInJarExcludes.addAll( META_INF_MANIFEST );
}
if ( parsedFilterMavenDescriptor )
{
globalInJarExcludes.addAll( MAVEN_DESCRIPTOR );
}
// we first add the application's own class files
addInJar( project.getBuild().getOutputDirectory() );
// we then add all its dependencies (incl. transitive ones), unless they're blacklisted
for ( Artifact artifact : getAllRelevantDependencyArtifacts() )
{
if ( isBlacklistedArtifact( artifact ) || !USED_DEPENDENCY_TYPE.equals( artifact.getType() ) )
{
continue;
}
addInJar( artifact.getFile().getAbsolutePath(), globalInJarExcludes );
}
}
private void addInJar( String path, Collection filterExpression )
{
inJars.add( new ProGuardInput( path, filterExpression ) );
}
private void addInJar( String path )
{
addInJar( path, null );
}
private void addLibraryJar( String path, Collection filterExpression )
{
libraryJars.add( new ProGuardInput( path, filterExpression ) );
}
private void addLibraryJar( String path )
{
addLibraryJar( path, null );
}
private void collectLibraryInputFiles()
{
if ( parsedIncludeJdkLibs )
{
// we have to add the Java framework classes to the library JARs, since they are not
// distributed with the JAR on Central, and since we'll strip them out of the android.jar
// that is shipped with the SDK (since that is not a complete Java distribution)
File rtJar = getJVMLibrary( "rt.jar" );
if ( rtJar == null )
{
rtJar = getJVMLibrary( "classes.jar" );
}
if ( rtJar != null )
{
addLibraryJar( rtJar.getPath() );
}
// we also need to add the JAR containing e.g. javax.servlet
File jsseJar = getJVMLibrary( "jsse.jar" );
if ( jsseJar != null )
{
addLibraryJar( jsseJar.getPath() );
}
// and the javax.crypto stuff
File jceJar = getJVMLibrary( "jce.jar" );
if ( jceJar != null )
{
addLibraryJar( jceJar.getPath() );
}
}
// we treat any dependencies with provided scope as library JARs
for ( Artifact artifact : project.getArtifacts() )
{
if ( artifact.getScope().equals( JavaScopes.PROVIDED ) )
{
if ( artifact.getArtifactId().equals( "android" ) && parsedIncludeJdkLibs )
{
addLibraryJar( artifact.getFile().getAbsolutePath(), ANDROID_LIBRARY_EXCLUDED_FILTER );
}
else
{
addLibraryJar( artifact.getFile().getAbsolutePath() );
}
}
else
{
if ( isShiftedArtifact( artifact ) )
{
// this is a blacklisted artifact that should be processed as a library instead
addLibraryJar( artifact.getFile().getAbsolutePath() );
}
}
}
}
/**
* Get the path to the proguard jar.
*
* @return
* @throws MojoExecutionException
*/
private String getProguardJarPath() throws MojoExecutionException
{
String proguardJarPath = getProguardJarPathFromDependencies();
if ( StringUtils.isEmpty( proguardJarPath ) )
{
File proguardJarPathFile = new File( getAndroidSdk().getToolsPath(), "proguard/lib/proguard.jar" );
return proguardJarPathFile.getAbsolutePath();
}
return proguardJarPath;
}
private String getProguardJarPathFromDependencies() throws MojoExecutionException
{
Artifact proguardArtifact = null;
int proguardArtifactDistance = - 1;
for ( Artifact artifact : pluginDependencies )
{
getLog().debug( "pluginArtifact: " + artifact.getFile() );
if ( ( "proguard".equals( artifact.getArtifactId() ) ) || ( "proguard-base"
.equals( artifact.getArtifactId() ) ) )
{
int distance = artifact.getDependencyTrail().size();
getLog().debug( "proguard DependencyTrail: " + distance );
if ( proguardArtifactDistance == - 1 )
{
proguardArtifact = artifact;
proguardArtifactDistance = distance;
}
else
{
if ( distance < proguardArtifactDistance )
{
proguardArtifact = artifact;
proguardArtifactDistance = distance;
}
}
}
}
if ( proguardArtifact != null )
{
getLog().debug( "proguardArtifact: " + proguardArtifact.getFile() );
return proguardArtifact.getFile().getAbsoluteFile().toString();
}
else
{
return null;
}
}
/**
* Get the default JVM arguments for the proguard invocation.
*
* @return
* @see #parsedJvmArguments
*/
private String[] getDefaultJvmArguments()
{
return new String[]{ "-Xmx512M" };
}
/**
* Get the default ProGuard config files.
*
* @return
* @see #parsedConfigs
*/
private String[] getDefaultProguardConfigs()
{
return new String[0];
}
/**
* Finds a library file in either the primary or alternate lib directory.
* @param fileName The base name of the file.
* @return Either a canonical filename, or {@code null} if not found.
*/
private File getJVMLibrary( String fileName )
{
File libFile = new File( getJavaLibDir(), fileName );
if ( !libFile.exists() )
{
libFile = new File( getAltJavaLibDir(), fileName );
if ( !libFile.exists() )
{
libFile = null;
}
}
return libFile;
}
/**
* Determines the java.home directory.
* @return The java.home directory, as a File.
*/
private File getJavaHomeDir()
{
if ( javaHomeDir == null )
{
javaHomeDir = new File( System.getProperty( "java.home" ) );
}
return javaHomeDir;
}
/**
* Determines the primary JVM library location.
* @return The primary library directory, as a File.
*/
private File getJavaLibDir()
{
if ( javaLibDir == null )
{
javaLibDir = new File( getJavaHomeDir(), "lib" );
}
return javaLibDir;
}
/**
* Determines the alternate JVM library location (applies with older
* MacOSX JVMs).
* @return The alternate JVM library location, as a File.
*/
private File getAltJavaLibDir()
{
if ( altJavaLibDir == null )
{
altJavaLibDir = new File( getJavaHomeDir().getParent(), "Classes" );
}
return altJavaLibDir;
}
}
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