slawekjaranowski commented on a change in pull request #2: URL: https://github.com/apache/maven-studies/pull/2#discussion_r500795403
########## File path: src/main/java/org/apache/maven/plugins/sign/SignMojo.java ########## @@ -0,0 +1,211 @@ +package org.apache.maven.plugins.sign; + +/* + * 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.artifact.Artifact; +import org.apache.maven.execution.MavenSession; +import org.apache.maven.plugin.AbstractMojo; +import org.apache.maven.plugin.MojoExecutionException; +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.sign.pgp.PGPSigner; +import org.apache.maven.plugins.sign.pgp.PGPSignerException; +import org.apache.maven.project.MavenProject; +import org.apache.maven.project.MavenProjectHelper; +import org.apache.maven.project.artifact.ProjectArtifact; +import org.eclipse.aether.transform.FileTransformer; +import org.eclipse.aether.transform.TransformException; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import javax.inject.Inject; +import java.io.BufferedInputStream; +import java.io.File; +import java.io.FileInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashSet; +import java.util.List; +import java.util.Set; + +/** + * Sign project artifacts. + * + * @author Slawomir Jaranowski + */ +@Mojo( name = "sign", defaultPhase = LifecyclePhase.VERIFY ) +public class SignMojo extends AbstractMojo +{ + + private static final Logger LOGGER = LoggerFactory.getLogger( SignMojo.class ); + + @Parameter( defaultValue = "${project}", readonly = true, required = true ) + private MavenProject project; + + @Parameter( defaultValue = "${session}", required = true, readonly = true ) + protected MavenSession session; + + @Parameter( property = "maven.sign.keyId" ) + private String keyId; + + @Parameter( required = true, property = "maven.sign.keyPassphrase" ) + private String keyPassphrase; + + @Parameter( required = true, property = "maven.sign.keyFile" ) + private File keyFile; + + @Inject + private MavenProjectHelper projectHelper; + + private PGPSigner pgpSigner; + + @Override + public void execute() throws MojoExecutionException + { + try + { + pgpSigner = new PGPSigner( new PGPSecretKeyInfoFromParams( keyId, keyPassphrase, keyFile ) ); + } + catch ( PGPSignerException e ) + { + LOGGER.error( "{}", e.getMessage() ); + throw new MojoExecutionException( e.getMessage(), e ); + } + + // collect artifact to sign + Set<Artifact> artifactsToSign = new HashSet<>(); + + artifactsToSign.add( new ProjectArtifact( project ) ); + artifactsToSign.add( project.getArtifact() ); + artifactsToSign.addAll( project.getAttachedArtifacts() ); + + // sign and attach signature to project + artifactsToSign.stream() + .map( this::signArtifact ) + .flatMap( List::stream ) + .forEach( this::attachSignResult ); + } + + /** + * Sign given artifact. In result we can have multiple signatures, transformers can produce multiple output for one + * artifact. + * <p> + * This method ask transformers for inputStream for all artifact mutations, and sign each stream. + * + * @param artifact artifact to sign + * @return sign result + */ + private List<SignResult> signArtifact( Artifact artifact ) + { + LOGGER.info( "Signing artifact: {}", artifact ); + + org.eclipse.aether.artifact.Artifact srcArtifact = new org.eclipse.aether.artifact.DefaultArtifact( + artifact.getGroupId(), + artifact.getArtifactId(), + artifact.getClassifier(), + artifact.getArtifactHandler().getExtension(), + artifact.getVersion(), + null, + artifact.getFile() ); + + Collection<FileTransformer> transformersForArtifact = session.getRepositorySession().getFileTransformerManager() + .getTransformersForArtifact( srcArtifact ); + + List<SignResult> result = new ArrayList<>(); + + try + { + if ( transformersForArtifact.isEmpty() ) + { + try ( InputStream artifactInputStream = new BufferedInputStream( + new FileInputStream( srcArtifact.getFile() ) ) ) + { + result.add( makeSignature( artifactInputStream, + srcArtifact.getArtifactId(), + srcArtifact.getClassifier(), + srcArtifact.getExtension() ) ); + } + } + else + { + for ( FileTransformer fileTransformer : transformersForArtifact ) + { + org.eclipse.aether.artifact.Artifact dstArtifact = fileTransformer.transformArtifact( srcArtifact ); + result.add( makeSignature( fileTransformer.transformData( srcArtifact.getFile() ), + dstArtifact.getArtifactId(), + dstArtifact.getClassifier(), + dstArtifact.getExtension() ) ); + } + } + } + catch ( IOException | PGPSignerException | TransformException e ) + { + throw new SignMojoException( e ); + } + + return result; + } + + /** + * Sign given input stream. In result we will have file with signature. + * + * @param inputStream data to sign + * @param artifactId used for build filename + * @param classifier used for build filename + * @param extension used for build filename + * @return result of signing + * @throws PGPSignerException if some thing wrong + */ + private SignResult makeSignature( InputStream inputStream, String artifactId, String classifier, String extension ) Review comment: And the Transformer Api should provide something like chaining calling, currently input for method `transformer.transformData` is `File` should be `InputStream`. I see some challenge for dynamically configuration for transformers - one kind is produce more version / type of artifact (now we have such type) and second kind is signing / process output from first kind. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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