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/*
* Copyright © 2018 European Support Limited
*
* Licensed 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 a "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.openecomp.sdc.onboarding;
import java.io.File;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.RecursiveTask;
import java.util.stream.Collectors;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.plugins.annotations.ResolutionScope;
import org.apache.maven.project.MavenProject;
@Mojo(name = "generate-signature", threadSafe = true, defaultPhase = LifecyclePhase.COMPILE,
requiresDependencyResolution = ResolutionScope.NONE)
public class SnapshotSignature extends AbstractMojo {
public static final String JAVA_EXT = ".java";
public static final String UNICORN = "unicorn";
public static final String CHECKSUM = "checksum";
public static final String DOT = ".";
public static final String SHA1 = "sha1";
public static final String COLON = ":";
public static final String ANY_EXT = "*";
public static final String SNAPSHOT = "SNAPSHOT";
public static final String JAR = "jar";
@Parameter
private File mainSourceLocation;
@Parameter
private File mainResourceLocation;
@Parameter(defaultValue = "${project}")
private MavenProject project;
@Override
public void execute() throws MojoExecutionException, MojoFailureException {
if (!JAR.equals(project.getPackaging())) {
return;
}
init();
long resourceChecksum = getChecksum(mainResourceLocation, ANY_EXT);
long mainChecksum = getChecksum(mainSourceLocation, JAVA_EXT);
byte[] sourceChecksum = calculateChecksum(mainChecksum, resourceChecksum).getBytes();
generateSignature(sourceChecksum);
}
private void init() {
if (mainSourceLocation == null) {
mainSourceLocation = Paths.get(project.getBuild().getSourceDirectory()).toFile();
}
if (mainResourceLocation == null) {
mainResourceLocation = Paths.get(project.getBuild().getResources().get(0).getDirectory()).toFile();
}
}
private long getChecksum(File file, String fileType) {
try {
return readSources(file, fileType).hashCode();
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
private Map<String, List<String>> readSources(File file, String fileType) throws IOException {
Map<String, List<String>> source = new HashMap<>();
if (file.exists()) {
List<File> list = Files.walk(Paths.get(file.getAbsolutePath()))
.filter(JAVA_EXT.equals(fileType) ? this::isRegularJavaFile : Files::isRegularFile)
.map(Path::toFile).collect(Collectors.toList());
source.putAll(ForkJoinPool.commonPool()
.invoke(new FileReadTask(list.toArray(new File[0]), file.getAbsolutePath())));
}
return source;
}
private boolean isRegularJavaFile(Path path) {
File file = path.toFile();
return file.isFile() && file.getName().endsWith(JAVA_EXT);
}
private class FileReadTask extends RecursiveTask<Map<String, List<String>>> {
private Map<String, List<String>> store = new HashMap<>();
File[] files;
String pathPrefix;
private static final int MAX_FILES = 10;
FileReadTask(File[] files, String pathPrefix) {
this.files = files;
this.pathPrefix = pathPrefix;
}
private List<String> getData(File file) throws IOException {
List<String> coll = Files.readAllLines(file.toPath(), StandardCharsets.ISO_8859_1);
if (file.getAbsolutePath().contains(File.separator + "generated-sources" + File.separator)) {
Iterator<String> itr = coll.iterator();
while (itr.hasNext()) {
String s = itr.next();
if (s == null || s.trim().startsWith("/") || s.trim().startsWith("*")) {
itr.remove();
}
}
}
return coll;
}
@Override
protected Map<String, List<String>> compute() {
if (files.length > MAX_FILES) {
FileReadTask task1 = new FileReadTask(Arrays.copyOfRange(files, 0, files.length / 2), pathPrefix);
FileReadTask task2 =
new FileReadTask(Arrays.copyOfRange(files, files.length / 2, files.length), pathPrefix);
task1.fork();
task2.fork();
store.putAll(task1.join());
store.putAll(task2.join());
} else {
for (File toRead : files) {
try {
store.put(toRead.getAbsolutePath().substring(pathPrefix.length())
.replace(File.separatorChar, '.'), getData(toRead));
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
}
return store;
}
}
private void generateSignature(byte[] sourceChecksum) {
try {
Paths.get(project.getBuild().getOutputDirectory()).toFile().mkdirs();
Files.write(Paths.get(project.getBuild().getOutputDirectory(), UNICORN + DOT + CHECKSUM), sourceChecksum,
StandardOpenOption.CREATE);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
private String calculateChecksum(long mainChecksum, long resourceChecksum) throws MojoExecutionException {
try {
return getSourceChecksum(mainChecksum + COLON + resourceChecksum, SHA1);
} catch (NoSuchAlgorithmException e) {
throw new MojoExecutionException(e.getMessage(), e);
}
}
private String getSourceChecksum(String data, String hashType) throws NoSuchAlgorithmException {
MessageDigest md = MessageDigest.getInstance(hashType);
md.update(data.getBytes());
byte[] hashBytes = md.digest();
StringBuilder buffer = new StringBuilder();
for (byte hashByte : hashBytes) {
buffer.append(Integer.toString((hashByte & 0xff) + 0x100, 16).substring(1));
}
return buffer.toString();
}
}
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