Gradle create pom failed - maven

Question

I wanted to create a pom.xml with Gradle.
But it failed.
Here my build.gradle (project)
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.2.1'
classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
google()
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
task writeNewPom {
doLast {
pom {
project {
inceptionYear '2008'
licenses {
license {
name 'The Apache Software License, Version 2.0'
url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
distribution 'repo'
}
}
}
}.writeTo("$buildDir/pom.xml")
}
}
and my build.gradle (module)
apply plugin: 'com.android.application'
apply plugin: 'com.github.dcendents.android-maven'
group = 'com.github.ludev-studio'
apply plugin: 'maven'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.ludevstudio.colorpicker"
minSdkVersion 15
targetSdkVersion 28
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard- android.txt'), 'proguard-rules.pro'
}
}
buildToolsVersion '28.0.3'
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:28.0.0'
testImplementation 'junit:junit:4.12'
implementation project(':colorpicker')
}
this is the output, then I executet the writeNewPom Task with the gradlew.bat:
FAILURE: Build failed with an exception.
* Where:
Build file 'C:\Users\lucad\Documents\programmierung\Projekte\Java\Androidlibraries\Colo rpicker\build.gradle' line: 32
* What went wrong:
Execution failed for task ':writeNewPom'.
> Could not find method pom() for arguments [build_1nb7g16o7col6erw9g4aech65 $_run_closure3$_closure5 $_closure6#30d7b2ef] on task ':writeNewPom' of type org.gradle.api.DefaultTask.
* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':writeNewPom'.
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions (ExecuteActionsTaskExecuter.java:103)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute (ExecuteActionsTaskExecuter.java:73)
at org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execu te(OutputDirectoryCreatingTaskExecuter.java:51)
at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:59)
at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.exe cute(ResolveTaskOutputCachingStateExecuter.java:54)
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute (ValidatingTaskExecuter.java:59)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute (SkipEmptySourceFilesTaskExecuter.java:101)
at org.gradle.api.internal.tasks.execution.FinalizeInputFilePropertiesTaskExecuter.execute(FinalizeInputFilePropertiesTaskExecuter.java:44)
at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute (CleanupStaleOutputsExecuter.java:91)
at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:62)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:59)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:256)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run (DefaultBuildOperationExecutor.java:110)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:249)
at o rg.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:238)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:123)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:79)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:104)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:98)
at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:663)
at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:597)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:98)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run (ManagedExecutorImpl.java:46)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
Caused by: org.gradle.internal.metaobject.AbstractDynamicObject$CustomMessageMissingMethodException: Could not find method pom() for arguments [build_1nb7g16o7col6erw9g4aech65$_run_closure3$_closure5$_closure6#30d7b2ef] on task ':writeNewPom' of type org.gradle.api.DefaultTask.
atorg.gradle.internal.metaobject.AbstractDynamicObject.methodMissingException(AbstractDynamicObject.java:179)
at org.gradle.internal.metaobject.AbstractDynamicObject.invokeMethod(AbstractDynamicObject.java:164)
at org.gradle.api.DefaultTask_Decorated.invokeMethod(Unknown Source)
at build_1nb7g16o7col6erw9g4aech65$_run_closure3$_closure5.doCall(C:\Users\lucad\Documents\programmierung\Projekte\Java\Androidlibraries\Colorpicker\build.gradle:32)
at org.gradle.api.internal.AbstractTask$ClosureTaskAction.execute(AbstractTask.java:726)
at org.gradle.api.internal.AbstractTask$ClosureTaskAction.execute(AbstractTask.java:699)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run (ExecuteActionsTaskExecuter.java:124) at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperation Worker.execute(DefaultBuildOperationExecutor.java:336)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperation Worker.execute(DefaultBuildOperationExecutor.java:328)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute (DefaultBuildOperationExecutor.java:199)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run (DefaultBuildOperationExecutor.java:110)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction (ExecuteActionsTaskExecuter.java:113)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions (ExecuteActionsTaskExecuter.java:95)
... 30 more
* Get more help at https://help.gradle.org
BUILD FAILED in 8s
1 actionable task: 1 executed
I red something about missing maven plugin, but like you can see in my gradle.build, I added the plugin.
So, what to do?

Answer 1

From your trace
Caused by: org.gradle.internal.metaobject.AbstractDynamicObject$CustomMessageMissingMethodException: Could not find method pom() for arguments [build_1nb7g16o7col6erw9g4aech65$_run_closure3$_closure5$_closure6#30d7b2ef] on task ':writeNewPom' of type org.gradle.api.DefaultTask.
Gradle couldn't find any suitable type to delegate the pom() method to, thats because you forgot
apply plugin: 'maven'
in your projectbuild.gradle. Just put the above line in your project build.gradle and it'll all be good.