Maven codegen

biz.aQute.bnd.maven/src/aQute/bnd/maven/lib/configuration/BndConfiguration.java

@@ -0,0 +1,129 @@
+package aQute.bnd.maven.lib.configuration;
+
+import static java.util.Objects.requireNonNull;
+
+import java.io.File;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+import org.apache.maven.model.Plugin;
+import org.apache.maven.model.PluginExecution;
+import org.apache.maven.model.PluginManagement;
+import org.apache.maven.plugin.MojoExecution;
+import org.apache.maven.project.MavenProject;
+import org.codehaus.plexus.util.xml.Xpp3Dom;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import aQute.bnd.build.Project;
+import aQute.bnd.osgi.Processor;
+import aQute.lib.io.IO;
+import aQute.lib.utf8properties.UTF8Properties;
+
+/**
+ * A helper to read Bnd configuration for maven plugins consistently over the
+ * various Mojos.
+ */
+public class BndConfiguration {
+	private final static Logger	logger	= LoggerFactory.getLogger(BndConfiguration.class);
+
+	private final MavenProject	project;
+	private final MojoExecution	mojoExecution;
+
+	public BndConfiguration(MavenProject project, MojoExecution mojoExecution) {
+		this.project = requireNonNull(project);
+		this.mojoExecution = requireNonNull(mojoExecution);
+	}
+
+	public File loadProperties(Processor processor) throws Exception {
+		// Load parent project properties first
+		loadParentProjectProperties(processor, project);
+
+		// Load current project properties
+		Xpp3Dom configuration = Optional.ofNullable(project.getBuildPlugins())
+			.flatMap(this::getConfiguration)
+			.orElseGet(this::defaultConfiguration);
+		return loadProjectProperties(processor, project, project, configuration);
+	}
+
+	private void loadParentProjectProperties(Processor builder, MavenProject currentProject) throws Exception {
+		MavenProject parentProject = currentProject.getParent();
+		if (parentProject == null) {
+			return;
+		}
+		loadParentProjectProperties(builder, parentProject);
+
+		// Get configuration from parent project
+		Xpp3Dom configuration = Optional.ofNullable(parentProject.getBuildPlugins())
+			.flatMap(this::getConfiguration)
+			.orElse(null);
+		if (configuration != null) {
+			// Load parent project's properties
+			loadProjectProperties(builder, parentProject, parentProject, configuration);
+			return;
+		}
+
+		// Get configuration in project's pluginManagement
+		configuration = Optional.ofNullable(currentProject.getPluginManagement())
+			.map(PluginManagement::getPlugins)
+			.flatMap(this::getConfiguration)
+			.orElseGet(this::defaultConfiguration);
+		// Load properties from parent project's bnd file or configuration in
+		// project's pluginManagement
+		loadProjectProperties(builder, parentProject, currentProject, configuration);
+	}
+
+	private File loadProjectProperties(Processor processor, MavenProject bndProject, MavenProject pomProject,
+		Xpp3Dom configuration) throws Exception {
+		// check for bnd file configuration
+		File baseDir = bndProject.getBasedir();
+		if (baseDir != null) { // file system based pom
+			File pomFile = bndProject.getFile();
+			processor.updateModified(pomFile.lastModified(), "POM: " + pomFile);
+			// check for bnd file
+			Xpp3Dom bndfileElement = configuration.getChild("bndfile");
+			String bndFileName = (bndfileElement != null) ? bndfileElement.getValue() : Project.BNDFILE;
+			File bndFile = IO.getFile(baseDir, bndFileName);
+			if (bndFile.isFile()) {
+				logger.debug("loading bnd properties from file: {}", bndFile);
+				// we use setProperties to handle -include
+				processor.setProperties(bndFile.getParentFile(), processor.loadProperties(bndFile));
+				return bndFile;
+			}
+			// no bnd file found, so we fall through
+		}
+
+		// check for bnd-in-pom configuration
+		baseDir = pomProject.getBasedir();
+		File pomFile = pomProject.getFile();
+		if (baseDir != null) {
+			processor.updateModified(pomFile.lastModified(), "POM: " + pomFile);
+		}
+		Xpp3Dom bndElement = configuration.getChild("bnd");
+		if (bndElement != null) {
+			logger.debug("loading bnd properties from bnd element in pom: {}", pomProject);
+			UTF8Properties properties = new UTF8Properties();
+			properties.load(bndElement.getValue(), pomFile, processor);
+			// we use setProperties to handle -include
+			processor.setProperties(baseDir, properties.replaceHere(baseDir));
+		}
+		return pomFile;
+	}
+
+	private Optional<Xpp3Dom> getConfiguration(List<Plugin> plugins) {
+		return plugins.stream()
+			.filter(p -> Objects.equals(p, mojoExecution.getPlugin()))
+			.map(Plugin::getExecutions)
+			.flatMap(List::stream)
+			.filter(e -> Objects.equals(e.getId(), mojoExecution.getExecutionId()))
+			.findFirst()
+			.map(PluginExecution::getConfiguration)
+			.map(Xpp3Dom.class::cast)
+			.map(Xpp3Dom::new);
+	}
+
+	private Xpp3Dom defaultConfiguration() {
+		return new Xpp3Dom("configuration");
+	}
+}

biz.aQute.bnd.maven/src/aQute/bnd/maven/lib/configuration/package-info.java

@@ -1,4 +1,4 @@
-@Version("1.1.0")
+@Version("1.2.0")
 @Export
 package aQute.bnd.maven.lib.configuration;
 

biz.aQute.bndlib/src/aQute/bnd/build/ProjectGenerate.java

@@ -93,7 +93,7 @@ private Result<Void> prepare(String sourceWithDuplicate, GeneratorSpec st) {
 
 		Set<File> sourceFiles = new FileSet(project.getBase(), source).getFiles();
 		if (sourceFiles.isEmpty())
-			return err("No source files/directories specified");
+			return err("No source files/directories found in fileset %s", source);
 
 		File out = project.getFile(output);
 		if (out.isDirectory()) {

maven/README.md

@@ -59,6 +59,10 @@ A plugin to run a bndrun file.
 
 A plugin to generate and export reports of projects.
 
+## [bnd-generate-maven-plugin][11]
+
+A plugin to generate sources and resources.
+
 # Building the Maven Plugins
 
 You must first run `./gradlew :build` to build the Bnd artifacts and install them in your local maven repo.
@@ -113,3 +117,4 @@ pom's `pluginManagement` section, to configure the repository:
 [8]: bnd-testing-maven-plugin/README.md
 [9]: bnd-run-maven-plugin/README.md
 [10]: bnd-reporter-maven-plugin/README.md
+[11]: bnd-generate-maven-plugin/README.md

maven/bnd-generate-maven-plugin/.gitignore

@@ -0,0 +1,3 @@
+/target/
+/bin/
+/.classpath

maven/bnd-generate-maven-plugin/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>bnd-generate-maven-plugin</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+	</natures>
+</projectDescription>

maven/bnd-generate-maven-plugin/.settings/org.eclipse.core.resources.prefs

@@ -0,0 +1,4 @@
+eclipse.preferences.version=1
+encoding//src/main/java=UTF-8
+encoding//src/main/resources=UTF-8
+encoding/<project>=UTF-8

maven/bnd-generate-maven-plugin/.settings/org.eclipse.core.runtime.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+line.separator=\n