[mojo-dev] [jira] (MVERSIONS-201) Usage of parent properties in child poms results in NullPointerException

[Stefan Negrea (JIRA)]

Stefan Negrea created MVERSIONS-201 Usage of parent properties in child poms results in NullPointerException Issue Type: Bug Affects Versions: 2.0 Assignee: Unassigned Attachments: projectSample.zip Created: 30/Nov/12 2:02 PM Description: The versions plugin 2.0 fails to process dependencies that require variable substitutions for variables defined in the parent pom. I created and attached a minimal project that showcases the error. This error does not exist with versions 1.3.1 or 1.2, however the failure is consistent in versions 2.0. Example of dependency, note that $random.groupId is defined in parent pom. <dependencyManagement> <dependencies> <dependency> <groupId>${random.groupId}</groupId> <artifactId>test-module1</artifactId> <version>${project.version}</version> </dependency> </dependencies> </dependencyManagement> Failing maven command using versions plugin 2.0: mvn org.codehaus.mojo:versions-maven-plugin:2.0:set org.codehaus.mojo:versions-maven-plugin:2.0:use-releases -DnewVersion=1.4 -DallowSnapshots=false -DgenerateBackupPoms=false -X The error message: [ERROR] Failed to execute goal org.codehaus.mojo:versions-maven-plugin:2.0:set (default-cli) on project test-parent: Execution default-cli of goal org.codehaus.mojo:versions-maven-plugin:2.0:set failed. NullPointerException -> [Help 1] org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:versions-maven-plugin:2.0:set (default-cli) on project test-parent: Execution default-cli of goal org.codehaus.mojo:versions-maven-plugin:2.0:set failed. at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59) at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:158) at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537) at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196) at org.apache.maven.cli.MavenCli.main(MavenCli.java:141) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352) Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-cli of goal org.codehaus.mojo:versions-maven-plugin:2.0:set failed. at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209) ... 19 more Caused by: java.lang.NullPointerException at org.codehaus.mojo.versions.api.PomHelper.evaluate(PomHelper.java:685) at org.codehaus.mojo.versions.api.PomHelper.setDependencyVersion(PomHelper.java:578) at org.codehaus.mojo.versions.change.DependencyVersionChanger.apply(DependencyVersionChanger.java:46) at org.codehaus.mojo.versions.change.CompositeVersionChanger.apply(CompositeVersionChanger.java:52) at org.codehaus.mojo.versions.SetMojo.update(SetMojo.java:374) at org.codehaus.mojo.versions.AbstractVersionsUpdaterMojo.process(AbstractVersionsUpdaterMojo.java:322) at org.codehaus.mojo.versions.SetMojo.execute(SetMojo.java:331) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101) ... 20 more [ERROR] Same sample project, identical maven parameters, versions 1.3.1 changes the project version without an error: mvn org.codehaus.mojo:versions-maven-plugin:1.3.1:set org.codehaus.mojo:versions-maven-plugin:1.3.1:use-releases -DnewVersion=1.4 -DallowSnapshots=false -DgenerateBackupPoms=false -X Environment: Linux 3.6.2-4.fc17.x86_64x86_64 Apache Maven 3.0.4 (rNON-CANONICAL_2012-10-24_11-25_mockbuild; 2012-10-24 06:25:04-0500) jdk1.7.0_07 Project: Maven 2.x Versions Plugin Priority: Critical Reporter: Stefan Negrea

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