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/*******************************************************************************
* Copyright (c) 2009, 2016 Mountainminds GmbH & Co. KG and Contributors
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Evgeny Mandrikov - initial API and implementation
*
*******************************************************************************/
package org.jacoco.maven;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.codehaus.plexus.util.FileUtils;
import org.codehaus.plexus.util.IOUtil;
import org.jacoco.core.instr.Instrumenter;
import org.jacoco.core.runtime.OfflineInstrumentationAccessGenerator;
/**
* Performs offline instrumentation. Note that after execution of test you must
* restore original classes with help of "restore-instrumented-classes" goal.
* <p>
* <strong>Warning:</strong> The preferred way for code coverage analysis with
* JaCoCo is on-the-fly instrumentation. Offline instrumentation has several
* drawbacks and should only be used if a specific scenario explicitly requires
* this mode. Please consult <a href="offline.html">documentation</a> about
* offline instrumentation before using this mode.
* </p>
*
* @phase process-classes
* @goal instrument
* @requiresProject true
* @threadSafe
* @since 0.6.2
*/
public class InstrumentMojo extends AbstractJacocoMojo {
@Override
public void executeMojo() throws MojoExecutionException,
MojoFailureException {
final File originalClassesDir = new File(getProject().getBuild()
.getDirectory(), "generated-classes/jacoco");
originalClassesDir.mkdirs();
final File classesDir = new File(
getProject().getBuild().getOutputDirectory());
if (!classesDir.exists()) {
getLog().info(
"Skipping JaCoCo execution due to missing classes directory:" +
classesDir);
return;
}
final List<String> fileNames;
try {
fileNames = new FileFilter(this.getIncludes(), this.getExcludes())
.getFileNames(classesDir);
} catch (final IOException e1) {
throw new MojoExecutionException(
"Unable to get list of files to instrument.", e1);
}
final Instrumenter instrumenter = new Instrumenter(
new OfflineInstrumentationAccessGenerator());
for (final String fileName : fileNames) {
if (fileName.endsWith(".class")) {
final File source = new File(classesDir, fileName);
final File backup = new File(originalClassesDir, fileName);
InputStream input = null;
OutputStream output = null;
try {
FileUtils.copyFile(source, backup);
input = new FileInputStream(backup);
output = new FileOutputStream(source);
instrumenter.instrument(input, output, source.getPath());
} catch (final IOException e2) {
throw new MojoExecutionException(
"Unable to instrument file.", e2);
} finally {
IOUtil.close(input);
IOUtil.close(output);
}
}
}
}
}
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