skips generation if nothing has changed

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

@@ -341,6 +341,10 @@ private Set<File> getOutputDirs(boolean toClear) {
 	}
 
 	public boolean needsBuild() {
+		return needsBuild(project.getSelfAndAncestors());
+	}
+
+	public boolean needsBuild(List<File> ancestors) {
 		for (Entry<String, GeneratorSpec> e : project.instructions.generate()
 			.entrySet()) {
 
@@ -361,7 +365,7 @@ public boolean needsBuild() {
 			if (sourceFiles.isEmpty())
 				return true; // error handling
 
-			sourceFiles.addAll(project.getSelfAndAncestors());
+			sourceFiles.addAll(ancestors);
 
 			long latestModifiedSource = sourceFiles.stream()
 				.mapToLong(File::lastModified)

maven/bnd-generate-maven-plugin/src/it/generate-no-rerun/bnd.bnd

@@ -0,0 +1,5 @@
+-generate:\
+	src/main/resources/model/test.genmodel;\
+		generate="geckoEMF 1>out.log 2>out.log";\
+		genmodel="src/main/resources/model/test.genmodel";\
+		output=src/main/java

maven/bnd-generate-maven-plugin/src/it/generate-no-rerun/invoker.properties

@@ -0,0 +1,7 @@
+invoker.goals=--no-transfer-progress package
+
+# Run mvn with --debug for debug logging
+#invoker.debug=true
+
+# Run mvn in debugging mode and wait for a debugger to attach
+#invoker.environmentVariables.MAVEN_DEBUG_OPTS=-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=8000

maven/bnd-generate-maven-plugin/src/it/generate-no-rerun/pom.xml

@@ -0,0 +1,46 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+
+	<groupId>biz.aQute.bnd-test</groupId>
+	<artifactId>generate</artifactId>
+	<version>0.0.1</version>
+	<packaging>jar</packaging>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.geckoprojects.emf</groupId>
+			<artifactId>org.gecko.emf.osgi.api</artifactId>
+			<version>4.1.1.202202162308</version>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>biz.aQute.bnd</groupId>
+				<artifactId>bnd-generate-maven-plugin</artifactId>
+				<version>${bnd.version}</version>
+				<configuration>
+					<externalPlugins>
+						<dependency>
+							<groupId>org.geckoprojects.emf</groupId>
+							<artifactId>org.gecko.emf.osgi.codegen</artifactId>
+							<version>4.1.1.202202162308</version>
+						</dependency>
+					</externalPlugins>
+				</configuration>
+				<executions>
+					<execution>
+						<phase>generate-sources</phase>
+						<goals>
+							<goal>bnd-generate</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
+</project>

maven/bnd-generate-maven-plugin/src/it/generate-no-rerun/postbuild.groovy

@@ -0,0 +1,23 @@
+import aQute.bnd.build.Workspace
+import aQute.bnd.build.model.BndEditModel
+import aQute.bnd.osgi.Processor
+import aQute.bnd.properties.Document
+import aQute.bnd.version.MavenVersion
+import aQute.lib.io.IO
+
+import java.util.jar.Attributes
+import java.util.jar.JarFile;
+
+def baseVersion = new MavenVersion(bndVersion).toReleaseVersion()
+
+// Check the ecore file exist!
+File ecore = new File(basedir,"src/main/resources/model/test.ecore")
+assert ecore.isFile()
+
+// Check the genmodel file exist!
+File genmodel = new File(basedir,"src/main/resources/model/test.genmodel")
+assert genmodel.isFile()
+
+// Check the if some code generated file exist!
+File testClass = new File(basedir,"src/main/java/aQute/bnd/maven/model/test/TestShouldNotBeDeleted.java")
+assert testClass.isFile()

maven/bnd-generate-maven-plugin/src/it/generate-no-rerun/prebuild.groovy

@@ -0,0 +1,30 @@
+import aQute.bnd.build.Workspace
+import aQute.bnd.build.model.BndEditModel
+import aQute.bnd.osgi.Processor
+import aQute.bnd.properties.Document
+import aQute.bnd.version.MavenVersion
+import aQute.lib.io.IO
+
+import java.util.jar.Attributes
+import java.util.jar.JarFile;
+
+def baseVersion = new MavenVersion(bndVersion).toReleaseVersion()
+
+// Check the ecore file exist!
+File ecore = new File(basedir,"src/main/resources/model/test.ecore")
+assert ecore.isFile()
+
+// Check the genmodel file exist!
+File genmodel = new File(basedir,"src/main/resources/model/test.genmodel")
+assert genmodel.isFile()
+
+// Check the pomfile exist!
+File pom = new File(basedir,"pom.xml")
+assert pom.isFile()
+
+// Check the if some code generated file exist!
+File testClass = new File(basedir,"src/main/java/aQute/bnd/maven/model/test/TestShouldNotBeDeleted.java")
+assert testClass.isFile()
+
+genmodel.setLastModified(testClass.lastModified() - 10000L);
+pom.setLastModified(testClass.lastModified() - 10000L);

maven/bnd-generate-maven-plugin/src/it/generate-no-rerun/src/main/java/aQute/bnd/maven/model/test/Test.java

@@ -0,0 +1,18 @@
+/**
+ */
+package aQute.bnd.maven.model.test;
+
+import org.eclipse.emf.ecore.EObject;
+
+/**
+ * <!-- begin-user-doc -->
+ * A representation of the model object '<em><b>Test</b></em>'.
+ * <!-- end-user-doc -->
+ *
+ *
+ * @see aQute.bnd.maven.model.test.TestPackage#getTest()
+ * @model
+ * @generated
+ */
+public interface Test extends EObject {
+} // Test

maven/bnd-generate-maven-plugin/src/it/generate-no-rerun/src/main/java/aQute/bnd/maven/model/test/TestFactory.java

@@ -0,0 +1,42 @@
+/**
+ */
+package aQute.bnd.maven.model.test;
+
+import org.eclipse.emf.ecore.EFactory;
+
+/**
+ * <!-- begin-user-doc -->
+ * The <b>Factory</b> for the model.
+ * It provides a create method for each non-abstract class of the model.
+ * <!-- end-user-doc -->
+ * @see aQute.bnd.maven.model.test.TestPackage
+ * @generated
+ */
+public interface TestFactory extends EFactory {
+	/**
+	 * The singleton instance of the factory.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @generated
+	 */
+	TestFactory eINSTANCE = aQute.bnd.maven.model.test.impl.TestFactoryImpl.init();
+
+	/**
+	 * Returns a new object of class '<em>Test</em>'.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @return a new object of class '<em>Test</em>'.
+	 * @generated
+	 */
+	Test createTest();
+
+	/**
+	 * Returns the package supported by this factory.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @return the package supported by this factory.
+	 * @generated
+	 */
+	TestPackage getTestPackage();
+
+} //TestFactory

maven/bnd-generate-maven-plugin/src/it/generate-no-rerun/src/main/java/aQute/bnd/maven/model/test/TestPackage.java

@@ -0,0 +1,105 @@
+/**
+ */
+package aQute.bnd.maven.model.test;
+
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EPackage;
+
+/**
+ * <!-- begin-user-doc -->
+ * The <b>Package</b> for the model.
+ * It contains accessors for the meta objects to represent
+ * <ul>
+ *   <li>each class,</li>
+ *   <li>each feature of each class,</li>
+ *   <li>each operation of each class,</li>
+ *   <li>each enum,</li>
+ *   <li>and each data type</li>
+ * </ul>
+ * <!-- end-user-doc -->
+ * @see aQute.bnd.maven.model.test.TestFactory
+ * @model kind="package"
+ * @generated
+ */
+public interface TestPackage extends EPackage {
+	/**
+	 * The package name.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @generated
+	 */
+	String eNAME = "test";
+
+	/**
+	 * The package namespace URI.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @generated
+	 */
+	String eNS_URI = "https://bndtools.org/model/test/1.0";
+
+	/**
+	 * The package namespace name.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @generated
+	 */
+	String eNS_PREFIX = "test";
+
+	/**
+	 * The singleton instance of the package.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @generated
+	 */
+	TestPackage eINSTANCE = aQute.bnd.maven.model.test.impl.TestPackageImpl.init();
+
+	/**
+	 * The meta object id for the '{@link aQute.bnd.maven.model.test.impl.TestImpl <em>Test</em>}' class.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @see aQute.bnd.maven.model.test.impl.TestImpl
+	 * @see aQute.bnd.maven.model.test.impl.TestPackageImpl#getTest()
+	 * @generated
+	 */
+	int TEST = 0;
+
+	/**
+	 * The number of structural features of the '<em>Test</em>' class.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @generated
+	 * @ordered
+	 */
+	int TEST_FEATURE_COUNT = 0;
+
+	/**
+	 * The number of operations of the '<em>Test</em>' class.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @generated
+	 * @ordered
+	 */
+	int TEST_OPERATION_COUNT = 0;
+
+
+	/**
+	 * Returns the meta object for class '{@link aQute.bnd.maven.model.test.Test <em>Test</em>}'.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @return the meta object for class '<em>Test</em>'.
+	 * @see aQute.bnd.maven.model.test.Test
+	 * @generated
+	 */
+	EClass getTest();
+
+	/**
+	 * Returns the factory that creates the instances of the model.
+	 * <!-- begin-user-doc -->
+	 * <!-- end-user-doc -->
+	 * @return the factory that creates the instances of the model.
+	 * @generated
+	 */
+	TestFactory getTestFactory();
+
+} //TestPackage

maven/bnd-generate-maven-plugin/src/it/generate-no-rerun/src/main/java/aQute/bnd/maven/model/test/TestShouldNotBeDeleted.java

@@ -0,0 +1,18 @@
+/**
+ */
+package aQute.bnd.maven.model.test;
+
+import org.eclipse.emf.ecore.EObject;
+
+/**
+ * <!-- begin-user-doc -->
+ * A representation of the model object '<em><b>Test</b></em>'.
+ * <!-- end-user-doc -->
+ *
+ *
+ * @see aQute.bnd.maven.model.test.TestPackage#getTest()
+ * @model
+ * @generated
+ */
+public interface TestShouldNotBeDeleted extends EObject {
+} // Test