I did some more testing and discovered mvn -X... So I used mvn -X compile and mvn -X install to check the differences (it seems that the IDE 'Build' action uses the install goal).
I found that only with the install goal the recompilation of my module is triggered by this dependency: [DEBUG] New dependency detected: D:\JeromeDocs\NetBeansProjects\JJazzLab\modules\Guava\target\org-jjazz-guava-1.0-SNAPSHOT.jar This is just a library wrapper module for the Guava lib, which is built first by the reactor plugin. Guava is a dependency of most of the modules, hence the general recompilation. So how should I change the my guava module (pom below) to avoid this recompilation with the install goal ? <?xml version="1.0" encoding="UTF-8"?> <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> <parent> <groupId>org.jjazzlab</groupId> <artifactId>jjazzlab-parent</artifactId> <version>1.0-SNAPSHOT</version> <relativePath>../../pom.xml</relativePath> </parent> <artifactId>org-jjazz-guava</artifactId> <name>Guava</name> <packaging>nbm</packaging> <build> <plugins> <plugin> <groupId>org.apache.netbeans.utilities</groupId> <artifactId>nbm-maven-plugin</artifactId> <configuration> <publicPackages> <publicPackage>com.google.common.annotations</publicPackage> <publicPackage>com.google.common.base</publicPackage> <publicPackage>com.google.common.base.internal</publicPackage> <publicPackage>com.google.common.cache</publicPackage> <publicPackage>com.google.common.collect</publicPackage> <publicPackage>com.google.common.escape</publicPackage> <publicPackage>com.google.common.eventbus</publicPackage> <publicPackage>com.google.common.graph</publicPackage> <publicPackage>com.google.common.hash</publicPackage> <publicPackage>com.google.common.html</publicPackage> <publicPackage>com.google.common.io</publicPackage> <publicPackage>com.google.common.math</publicPackage> <publicPackage>com.google.common.net</publicPackage> <publicPackage>com.google.common.primitives</publicPackage> <publicPackage>com.google.common.reflect</publicPackage> <publicPackage>com.google.common.util.concurrent</publicPackage> <publicPackage>com.google.common.util.concurrent.internal</publicPackage> <publicPackage>com.google.common.xml</publicPackage> <publicPackage>com.google.thirdparty.publicsuffix</publicPackage> </publicPackages> </configuration> <extensions>true</extensions> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId> <configuration> <archive> <manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile> </archive> </configuration> </plugin> </plugins> </build> <dependencies> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>23.6-jre</version> </dependency> </dependencies> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> </project> Jerome Le lundi 22 mai 2023 à 11:48:50 UTC+2, Eric Barboni <sk...@apache.org> a écrit : Hi, Maven will build all children, but should be faster on the compilation plugin part you should have something like that : Nothing to compile - all classes are up to date. Best Regards Eric De : Jerome Lelasseux <lelass...@yahoo.com.INVALID> Envoyé : vendredi 19 mai 2023 21:04 À : NetBeans Mailing List <users@netbeans.apache.org> Objet : Why Maven build app always recompiles ? On my NB platform app, if I open a single module and build it, it recompiles only when source files are modified, as expected. But when I run Build on the parent project, maven always recompiles all modules. Is it normal ? Jerome App is here https://github.com/jjazzboss/JJazzLabTemp
