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Caused by: java.lang.NullPointerException: Cannot get property 'dependencies' on null object #4

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simasch opened this issue Dec 5, 2019 · 15 comments
Closed

Caused by: java.lang.NullPointerException: Cannot get property 'dependencies' on null object #4

simasch opened this issue Dec 5, 2019 · 15 comments

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@simasch
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simasch commented Dec 5, 2019

With this pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
         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>xy.z</groupId>
        <artifactId>z-parent</artifactId>
        <version>5.0.17</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <artifactId>z-ui</artifactId>
    <version>5.0.11-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>12</maven.compiler.source>
        <maven.compiler.target>12</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <drivers.dir>${project.basedir}/drivers</drivers.dir>
        <drivers.downloader.phase>pre-integration-test</drivers.downloader.phase>
    </properties>

    <dependencies>
        <dependency>
            <groupId>xy</groupId>
            <artifactId>z-db</artifactId>
            <version>5.0.37</version>
        </dependency>

        <dependency>
            <groupId>com.vaadin</groupId>
            <!-- Replace artifactId with vaadin-core to use only free components -->
            <artifactId>vaadin</artifactId>
            <exclusions>
                <!-- Webjars are only needed when running in Vaadin 13 compatibility mode -->
                <exclusion>
                    <groupId>com.vaadin.webjar</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.insites</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.polymer</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.polymerelements</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.vaadin</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.webjars.bowergithub.webcomponents</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-spring-boot-starter</artifactId>
            <exclusions>
                <!-- Excluding so that webjars are not included. -->
                <exclusion>
                    <groupId>com.vaadin</groupId>
                    <artifactId>vaadin-core</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.jooq.pro</groupId>
            <artifactId>jooq</artifactId>
        </dependency>

        <dependency>
            <groupId>com.oracle.ojdbc</groupId>
            <artifactId>ojdbc8</artifactId>
        </dependency>

        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.3.0</version>
        </dependency>
        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jaxb</groupId>
            <artifactId>jaxb-runtime</artifactId>
            <version>2.3.0</version>
        </dependency>
        <!--
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.9.4</version>
        </dependency>
        -->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.vaadin</groupId>
            <artifactId>vaadin-testbench</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <resources>
            <resource>
                <filtering>true</filtering>
                <directory>${basedir}/src/main/resources</directory>
                <includes>
                    <include>**/application*.properties</include>
                </includes>
            </resource>
            <resource>
                <directory>${basedir}/src/main/resources</directory>
                <excludes>
                    <exclude>**/application*.properties</exclude>
                </excludes>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>com.vaadin</groupId>
                <artifactId>vaadin-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>prepare-frontend</goal>
                            <goal>build-frontend</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <!--
            <plugin>
                <groupId>com.nickwongdev</groupId>
                <artifactId>aspectj-maven-plugin</artifactId>
                <version>1.12.1</version>
                <configuration>
                    <source>12</source>
                    <target>12</target>
                    <proc>none</proc>
                    <complianceLevel>12</complianceLevel>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.aspectj</groupId>
                        <artifactId>aspectjtools</artifactId>
                        <version>1.9.4</version>
                    </dependency>
                </dependencies>
            </plugin>
            -->
            <plugin>
                <groupId>com.amashchenko.maven.plugin</groupId>
                <artifactId>gitflow-maven-plugin</artifactId>
                <configuration>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <profiles>
        <profile>
            <!-- Production mode is activated using -Pproduction -->
            <id>production</id>
            <properties>
                <vaadin.productionMode>true</vaadin.productionMode>
            </properties>

            <dependencies>
                <dependency>
                    <groupId>com.vaadin</groupId>
                    <artifactId>flow-server-production-mode</artifactId>
                </dependency>
            </dependencies>

            <build>
                <plugins>
                    <plugin>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-maven-plugin</artifactId>
                        <configuration>
                            <jvmArguments>-Dvaadin.productionMode</jvmArguments>
                        </configuration>
                    </plugin>
                    <plugin>
                        <groupId>com.vaadin</groupId>
                        <artifactId>vaadin-maven-plugin</artifactId>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>build-frontend</goal>
                                </goals>
                                <phase>compile</phase>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>

        <profile>
            <id>integration-tests</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.springframework.boot</groupId>
                        <artifactId>spring-boot-maven-plugin</artifactId>
                        <executions>
                            <execution>
                                <id>start-spring-boot</id>
                                <phase>pre-integration-test</phase>
                                <goals>
                                    <goal>start</goal>
                                </goals>
                            </execution>
                            <execution>
                                <id>stop-spring-boot</id>
                                <phase>post-integration-test</phase>
                                <goals>
                                    <goal>stop</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>

                    <!-- Runs the integration tests (*IT) after the server is started -->
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-failsafe-plugin</artifactId>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>integration-test</goal>
                                    <goal>verify</goal>
                                </goals>
                            </execution>
                        </executions>
                        <configuration>
                            <trimStackTrace>false</trimStackTrace>
                            <enableAssertions>true</enableAssertions>
                            <systemPropertyVariables>
                                <!-- Pass location of downloaded webdrivers to the tests -->
                                <webdriver.chrome.driver>${webdriver.chrome.driver}</webdriver.chrome.driver>
                            </systemPropertyVariables>
                        </configuration>
                    </plugin>

                    <plugin>
                        <groupId>com.lazerycode.selenium</groupId>
                        <artifactId>driver-binary-downloader-maven-plugin</artifactId>
                        <version>1.0.17</version>
                        <configuration>
                            <downloadedZipFileDirectory>${project.basedir}/webdriver/zips</downloadedZipFileDirectory>
                            <rootStandaloneServerDirectory>${project.basedir}/webdriver</rootStandaloneServerDirectory>
                            <customRepositoryMap>${project.basedir}/webdrivers.xml</customRepositoryMap>
                        </configuration>
                        <executions>
                            <execution>
                                <!-- use phase "none" to skip download step -->
                                <phase>${drivers.downloader.phase}</phase>
                                <goals>
                                    <goal>selenium</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>
    </profiles>
</project>

I get

[ERROR] Failed to execute goal com.github.helpermethod:dependency-update-maven-plugin:0.4.0:update (default-cli) on project tosca-ui: Execution default-cli of goal com.github.helpermethod:dependency-update-maven-plugin:0.4.0:update failed: Cannot get property 'dependencies' on null object -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.github.helpermethod:dependency-update-maven-plugin:0.4.0:update (default-cli) on project tosca-ui: Execution default-cli of goal com.github.helpermethod:dependency-update-maven-plugin:0.4.0:update failed: Cannot get property 'dependencies' on null object
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:213)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-cli of goal com.github.helpermethod:dependency-update-maven-plugin:0.4.0:update failed: Cannot get property 'dependencies' on null object
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:148)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: java.lang.NullPointerException: Cannot get property 'dependencies' on null object
    at org.codehaus.groovy.runtime.NullObject.getProperty (NullObject.java:60)
    at org.codehaus.groovy.runtime.InvokerHelper.getProperty (InvokerHelper.java:190)
    at org.codehaus.groovy.runtime.callsite.NullCallSite.getProperty (NullCallSite.java:46)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty (AbstractCallSite.java:298)
    at com.github.helpermethod.UpdateMojo.dependencyManagementUpdates (UpdateMojo.groovy:173)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.groovy.reflection.CachedMethod.invoke (CachedMethod.java:101)
    at groovy.lang.MetaMethod.doMethodInvoke (MetaMethod.java:323)
    at groovy.lang.MetaClassImpl.invokeMethod (MetaClassImpl.java:1217)
    at groovy.lang.MetaClassImpl.invokeMethodClosure (MetaClassImpl.java:1050)
    at groovy.lang.MetaClassImpl.invokeMethod (MetaClassImpl.java:1092)
    at groovy.lang.MetaClassImpl.invokeMethod (MetaClassImpl.java:1041)
    at groovy.lang.Closure.call (Closure.java:405)
    at groovy.lang.Closure.call (Closure.java:399)
    at java_util_concurrent_Callable$call.call (Unknown Source)
    at com.github.helpermethod.UpdateMojo$_execute_closure1$_closure9.doCall (UpdateMojo.groovy:57)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.groovy.reflection.CachedMethod.invoke (CachedMethod.java:101)
    at groovy.lang.MetaMethod.doMethodInvoke (MetaMethod.java:323)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod (ClosureMetaClass.java:263)
    at groovy.lang.MetaClassImpl.invokeMethod (MetaClassImpl.java:1041)
    at groovy.lang.Closure.call (Closure.java:405)
    at groovy.lang.Closure.call (Closure.java:421)
    at org.codehaus.groovy.runtime.DefaultGroovyMethods.findResults (DefaultGroovyMethods.java:4689)
    at org.codehaus.groovy.runtime.DefaultGroovyMethods.findResults (DefaultGroovyMethods.java:4673)
    at org.codehaus.groovy.runtime.dgm$267.invoke (Unknown Source)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoMetaMethodSiteNoUnwrapNoCoerce.invoke (PojoMetaMethodSite.java:244)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call (PojoMetaMethodSite.java:53)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall (CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:115)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:127)
    at com.github.helpermethod.UpdateMojo$_execute_closure1.doCall (UpdateMojo.groovy:56)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.groovy.reflection.CachedMethod.invoke (CachedMethod.java:101)
    at groovy.lang.MetaMethod.doMethodInvoke (MetaMethod.java:323)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod (ClosureMetaClass.java:263)
    at groovy.lang.MetaClassImpl.invokeMethod (MetaClassImpl.java:1041)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call (PogoMetaClassSite.java:37)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall (CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:115)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:135)
    at com.github.helpermethod.UpdateMojo.withGit (UpdateMojo.groovy:135)
    at com.github.helpermethod.UpdateMojo$withGit.callCurrent (Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent (CallSiteArray.java:51)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent (AbstractCallSite.java:156)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent (AbstractCallSite.java:168)
    at com.github.helpermethod.UpdateMojo.execute (UpdateMojo.groovy:55)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
@helpermethod
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Collaborator

Thank you very much, I will look into it.

@helpermethod
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Collaborator

Okay, the POM doesn't have a <dependencyManagement> block. I thought the plugin already handles that case but obviously it does not.

@helpermethod
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Collaborator

b4c4fe6 should fix the NPE.

@simasch
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Author

simasch commented Dec 5, 2019

First error fixed. Next is here:

[ERROR] Failed to execute goal com.github.helpermethod:dependency-update-maven-plugin:0.4.1:update (default-cli) on project tosca-ui: Execution default-cli of goal com.github.helpermethod:dependency-update-maven-plugin:0.4.1:update failed: Cannot invoke method minus() on null object -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.github.helpermethod:dependency-update-maven-plugin:0.4.1:update (default-cli) on project tosca-ui: Execution default-cli of goal com.github.helpermethod:dependency-update-maven-plugin:0.4.1:update failed: Cannot invoke method minus() on null object
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:213)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-cli of goal com.github.helpermethod:dependency-update-maven-plugin:0.4.1:update failed: Cannot invoke method minus() on null object
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:148)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: java.lang.NullPointerException: Cannot invoke method minus() on null object
    at org.codehaus.groovy.runtime.NullObject.invokeMethod (NullObject.java:91)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call (PogoMetaClassSite.java:43)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall (CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.NullCallSite.call (NullCallSite.java:34)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall (CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:115)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:127)
    at com.github.helpermethod.UpdateMojo$_execute_closure1$_closure10$_closure12.doCall (UpdateMojo.groovy:92)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.groovy.reflection.CachedMethod.invoke (CachedMethod.java:101)
    at groovy.lang.MetaMethod.doMethodInvoke (MetaMethod.java:323)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod (ClosureMetaClass.java:263)
    at groovy.lang.MetaClassImpl.invokeMethod (MetaClassImpl.java:1041)
    at groovy.lang.Closure.call (Closure.java:405)
    at groovy.lang.Closure.call (Closure.java:421)
    at org.codehaus.groovy.runtime.DefaultGroovyMethods.with (DefaultGroovyMethods.java:370)
    at org.codehaus.groovy.runtime.DefaultGroovyMethods.tap (DefaultGroovyMethods.java:411)
    at org.codehaus.groovy.runtime.dgm$711.invoke (Unknown Source)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoMetaMethodSiteNoUnwrapNoCoerce.invoke (PojoMetaMethodSite.java:244)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call (PojoMetaMethodSite.java:53)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall (CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:115)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:127)
    at com.github.helpermethod.UpdateMojo$_execute_closure1$_closure10.doCall (UpdateMojo.groovy:90)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.groovy.reflection.CachedMethod.invoke (CachedMethod.java:101)
    at groovy.lang.MetaMethod.doMethodInvoke (MetaMethod.java:323)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod (ClosureMetaClass.java:263)
    at groovy.lang.MetaClassImpl.invokeMethod (MetaClassImpl.java:1041)
    at groovy.lang.Closure.call (Closure.java:405)
    at groovy.lang.Closure.call (Closure.java:421)
    at org.codehaus.groovy.runtime.DefaultGroovyMethods.each (DefaultGroovyMethods.java:2330)
    at org.codehaus.groovy.runtime.DefaultGroovyMethods.each (DefaultGroovyMethods.java:2315)
    at org.codehaus.groovy.runtime.DefaultGroovyMethods.each (DefaultGroovyMethods.java:2356)
    at org.codehaus.groovy.runtime.dgm$186.invoke (Unknown Source)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoMetaMethodSiteNoUnwrapNoCoerce.invoke (PojoMetaMethodSite.java:244)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call (PojoMetaMethodSite.java:53)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall (CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:115)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:127)
    at com.github.helpermethod.UpdateMojo$_execute_closure1.doCall (UpdateMojo.groovy:56)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.groovy.reflection.CachedMethod.invoke (CachedMethod.java:101)
    at groovy.lang.MetaMethod.doMethodInvoke (MetaMethod.java:323)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod (ClosureMetaClass.java:263)
    at groovy.lang.MetaClassImpl.invokeMethod (MetaClassImpl.java:1041)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call (PogoMetaClassSite.java:37)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall (CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:115)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call (AbstractCallSite.java:135)
    at com.github.helpermethod.UpdateMojo.withGit (UpdateMojo.groovy:135)
    at com.github.helpermethod.UpdateMojo$withGit.callCurrent (Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent (CallSiteArray.java:51)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent (AbstractCallSite.java:156)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent (AbstractCallSite.java:168)
    at com.github.helpermethod.UpdateMojo.execute (UpdateMojo.groovy:55)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:567)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

@helpermethod
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Where do you define the <scm> element? The plugin uses <connection> (or <developerConnection>) from the <scm> element for authentication.

@simasch
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simasch commented Dec 5, 2019

I don't have any a element in my pom.xml

@helpermethod
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Thanks again for your feedback, this is extremely valuable information!

So this problem seems to be two-fold:

  • the documentation should clarify that you need an scm block, similar to the maven-release-plugin or the maven-scm-plugin
  • the plugin needs to check the presence of the scm block and act accordingly

@simasch
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simasch commented Dec 5, 2019

I added the scm tag and now I get:

[ERROR] Failed to execute goal com.github.helpermethod:dependency-update-maven-plugin:0.4.1:update (default-cli) on project tosca-ui: Execution default-cli of goal com.github.helpermethod:dependency-update-maven-plugin:0.4.1:update failed: Cannot get property 'privateKey' on null object -> [Help 1]

@helpermethod
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How do you normally authenticate against Gitlab? SSH? Username Password?

@simasch
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simasch commented Dec 6, 2019

SSH. But I don't understand why you need the scm section. The project is a Git clone and everything is in place to execute git commands

@helpermethod
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I've tried to mimic the behaviour of the maven-scm-plugin which does require such a section (and a corresponding entry in the settings.xml).

If I remember correctly it's only required in order to abstract over different SCM implementations.

But as you correctly mention, the information the plugin needs is already in place.

@helpermethod
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helpermethod commented Dec 12, 2019 •
edited
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Hi @simasch I was pretty busy the last days / weeks, with work and Christmas and all! I will come back to your problem within the next few days! Sorry for letting you wait!

@helpermethod
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helpermethod commented Dec 22, 2019 •
edited
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Hi @simasch,

dependency-update-maven-plugin uses JGit underneath. JGit by default has no knowledge of Git's Credential Store so it somehow needs to provide credentials by some other means.

How the current mechanism works:

  • depending on the configured connectionType use connection or developerConnection
  • detect if the URL is a SSH or HTTP(s) URL
  • if SSH:
    • extract the hostname
    • use the hostname to lookup a server by id in the settings.xml
    • use the private key passphrase to decrypt the key
    • use the private key to authenticate against Gitlab

@helpermethod
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helpermethod commented Dec 22, 2019 •
edited
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A future version may implement a custom provider which may use the native credential store.

@helpermethod
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helpermethod commented Jan 19, 2020 •
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Hi, I'm currently working on a GitProvider which will use native git if present. That way, you don't need to setup authentication locally (or in Jenkins if you don't use the Docker agent).

Closing the issue and moving the discussion to #9.

@sparsick sparsick mentioned this issue Jul 19, 2022
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@simasch @helpermethod