creating maven plugin | Java Community | Help. Code. Learn. | Page 1

winged bone May 23, 2025, 10:09 PM

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ashen jettyBOT May 23, 2025, 10:09 PM

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shy nebula May 23, 2025, 10:10 PM

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the latest should be 1.5

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according to https://repo1.maven.org/maven2/org/apache/maven/archetypes/maven-archetype-plugin/

winged bone May 23, 2025, 10:11 PM

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👍

shy nebula May 23, 2025, 10:12 PM

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and you can probably also configure more

winged bone May 23, 2025, 10:13 PM

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now it also created a test class that fails...

shy nebula May 23, 2025, 10:14 PM

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Did you run mvn verify before making any changes?

winged bone May 23, 2025, 10:16 PM

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[ERROR] Failed to execute goal org.apache.maven.plugins:maven-plugin-plugin:3.13.1:helpmojo (help-goal) on project maven-plugin-test: You need to specify a goalPrefix as it can not be correctly computed -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[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/MojoExecutionException

oop

shy nebula May 23, 2025, 10:16 PM

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What exactly did you run and where?

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and how did you run it?

winged bone May 23, 2025, 10:17 PM

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i ran verify from here

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i dont think i have maven installed outisde of intelliJ

shy nebula May 23, 2025, 10:18 PM

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Can you show the full output?

winged bone May 23, 2025, 10:18 PM

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📎 message.txt

shy nebula May 23, 2025, 10:19 PM

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Is there an mvnw file?

winged bone May 23, 2025, 10:19 PM

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nope

shy nebula May 23, 2025, 10:20 PM

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Can you show the pom.xml?

winged bone May 23, 2025, 10:21 PM

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<version>3.7.0</version> at the bottom seems to throw an error

📎 pom.xml

shy nebula May 23, 2025, 10:22 PM

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Can you run mvn test?

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It is possible that it fails because you are running it from IntelliJ

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since the integration tests are running Maven on other projects to check the plugin working correctly

winged bone May 23, 2025, 10:23 PM

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oh ok

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📎 error.txt

shy nebula May 23, 2025, 10:26 PM

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Can you run C:\Program Files\JetBrains\IntelliJ IDEA 2024.2.3\plugins\maven\lib\maven3\bin\mvn verify -X?

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or however you run programs with spaces in the path on Windows

winged bone May 23, 2025, 10:28 PM

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"C:\Program Files\JetBrains\IntelliJ IDEA 2024.2.3\plugins\maven\lib\maven3\bin\mvn" verify -X should be like this and it says that it doesnt recognize verify

shy nebula May 23, 2025, 10:29 PM

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What's the exact wording?

winged bone May 23, 2025, 10:30 PM

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its in italian 😅

+ ... ns\IntelliJ IDEA 2024.2.3\plugins\maven\lib\maven3\bin\mvn" verify -X
+                                                                 ~~~~~~
Token 'verify' imprevisto nell'espressione o nell'istruzione.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : UnexpectedToken

"Token 'verify' unexpected in the expression or instruction"

shy nebula May 23, 2025, 10:30 PM

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ok that's a PowerShell error

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Can you add a & at the beginning of the command? so & "C:\..."

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I don't use Windows though lol

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and especially not PowerShell

winged bone May 23, 2025, 10:32 PM

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ooh ok it ran but theres no visible output in the terminal

shy nebula May 23, 2025, 10:33 PM

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winged bone `"C:\Program Files\JetBrains\IntelliJ IDEA 2024.2.3\plugins\maven\lib\maven3\bin...

Can you try that one in cmd instead of PowerShell?

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Alternatively it might not be mvn but mvn.bat or mvn.cmd - try using autocomplete

winged bone May 23, 2025, 10:34 PM

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The JAVA_HOME environment variable is not defined correctly, this environment variable is needed to run this program.

winged bone May 23, 2025, 10:34 PM

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shy nebula Can you try that one in cmd instead of PowerShell?

from the powershell

shy nebula May 23, 2025, 10:34 PM

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winged bone `The JAVA_HOME environment variable is not defined correctly, this environment v...

oh you don't even have a Java installation configuted outside of IntelliJ

shy nebula May 23, 2025, 10:35 PM

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winged bone from the powershell

that means you were able to run Maven but it wanted a Java installation

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Can you press the ctrl key twice in IntelliJ?

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that should pop up a text field I think

winged bone May 23, 2025, 10:35 PM

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yep

shy nebula May 23, 2025, 10:35 PM

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try entering mvn verify -X there

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maybe that works

winged bone May 23, 2025, 10:36 PM

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this is the full log

📎 message.txt

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You need to specify a goalPrefix as it can not be correctly computed
this is what causes the error

shy nebula May 23, 2025, 10:43 PM

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sounds like your plugin misses some configuration

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add this to the <configuration> of the maven-plugin-plugin:

<goalPrefix>YOUR_PLUGIN_PREFIX</goalPrefix>

winged bone May 23, 2025, 10:45 PM

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idk if this causes some of the errors but i copied the pom acactly from here
https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-invoker-plugin/3.9.0

shy nebula May 23, 2025, 10:46 PM

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shy nebula add this to the `<configuration>` of the maven-plugin-plugin: ```xml <goalPrefix...

with YOUR_PLUGIN_PREFIX being replaced by the short nane of your plugin - goals would then be invoked with mvn YOUR_PLUGIN_PREFIX:YOUR_GOAL_NAME

shy nebula May 23, 2025, 10:46 PM

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winged bone idk if this causes some of the errors but i copied the pom acactly from here htt...

that's just IntelliJ lying to you and it's kinda normal

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once the CLI build works, you can reload the Maven project in IntelliJ and it should realise the plugin exists

winged bone May 23, 2025, 10:48 PM

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verify works!

winged bone May 23, 2025, 10:51 PM

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shy nebula with `YOUR_PLUGIN_PREFIX` being replaced by the short nane of your plugin - goal...

<plugin>
          <artifactId>maven-plugin-plugin</artifactId>
          <version>3.13.1</version>
          <configuration>
            <goalPrefix>test</goalPrefix>
          </configuration>
        </plugin>

so mvn com.ale:test ?

shy nebula May 23, 2025, 10:52 PM

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winged bone ``` <plugin> <artifactId>maven-plugin-plugin</artifactId> <v...

Can you show your mojo class?

winged bone May 23, 2025, 10:52 PM

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package com.ale;


import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;

import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

/**
 * Goal which touches a timestamp file.
 */
@Mojo( name = "touch", defaultPhase = LifecyclePhase.PROCESS_SOURCES )
public class MyMojo
    extends AbstractMojo
{
    /**
     * Location of the file.
     */
    @Parameter( defaultValue = "${project.build.directory}", property = "outputDir", required = true )
    private File outputDirectory;

    public void execute()
        throws MojoExecutionException
    {
        File f = outputDirectory;

        if ( !f.exists() )
        {
            f.mkdirs();
        }

        File touch = new File( f, "touch.txt" );

        FileWriter w = null;
        try
        {
            w = new FileWriter( touch );

            w.write( "touch.txt" );
        }
        catch ( IOException e )
        {
            throw new MojoExecutionException( "Error creating file " + touch, e );
        }
        finally
        {
            if ( w != null )
            {
                try
                {
                    w.close();
                }
                catch ( IOException e )
                {
                    // ignore
                }
            }
        }
    }
}

shy nebula May 23, 2025, 10:53 PM

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winged bone verify works!

then you can reload the Maven project in IntelliJ to get rid of the visual error/IntelliJ lying about the plugin not existing - if you still have that

winged bone May 23, 2025, 10:53 PM

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shy nebula then you can reload the Maven project in IntelliJ to get rid of the visual error...

hmm i reloaded but its still there

shy nebula May 23, 2025, 10:54 PM

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your goalPrefix is test and your mojo name is touch so you could run mvn test:touch in a project using the plugin

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mvn -Prun-its verify

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-Prun-its activates the run-its profile

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which should force the invoker plugin to be downloaded (and it should also run the integration tests for the plugin which is how you'd test the plugin)

winged bone May 23, 2025, 10:57 PM

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[ERROR] The following builds failed:
[ERROR] *  simple-it\pom.xml
[INFO] -------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  11.486 s
[INFO] Finished at: 2025-05-24T00:55:32+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-invoker-plugin:3.9.0:verify (integration-test) on project maven-plugin-test: 1 build failed. See console output above for details. -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[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/MojoFailureException

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tho it did remove the error from the other pom which is nice :)

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the pom that's throwing the error is this

<?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>

  <groupId>com.ale.it</groupId>
  <artifactId>simple-it</artifactId>
  <version>1.0-SNAPSHOT</version>

  <description>A simple IT verifying the basic use case.</description>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <build>
    <plugins>
      <plugin>
        <groupId>@project.groupId@</groupId>
        <artifactId>@project.artifactId@</artifactId>
        <version>@project.version@</version>
        <executions>
          <execution>
            <id>touch</id>
            <phase>validate</phase>
            <goals>
              <goal>touch</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>

shy nebula May 23, 2025, 10:59 PM

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winged bone ``` [ERROR] The following builds failed: [ERROR] * simple-it\pom.xml [INFO] ---...

no output before that?

winged bone May 23, 2025, 10:59 PM

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this is the full output

📎 message.txt

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both tests passed

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ooh its the assertion that failed

shy nebula May 23, 2025, 11:01 PM

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yep

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Is there a rouch.txt anywhere?

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touch.txt*

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probably in the target directory of the integration test project

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or something like that

winged bone May 23, 2025, 11:03 PM

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no there isnt :I

shy nebula May 23, 2025, 11:03 PM

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maybe in target of the main project there's a directory for the test with another target directory

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Is there a simple-it\target directory?

winged bone May 23, 2025, 11:05 PM

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i created one insrc/it/simple-it/touch.txt and it did get pasted in the target

shy nebula May 23, 2025, 11:06 PM

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I mean the plugin is supposed to create that file but in a different location

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Is there really no src/it/simple-it/target directory? Check in the Windows explorer, not just in IntelliJ

winged bone May 23, 2025, 11:07 PM

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nope

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should i make one and put touch.txt in there?

shy nebula May 23, 2025, 11:08 PM

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Are there any other target directories?

shy nebula May 23, 2025, 11:08 PM

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winged bone should i make one and put touch.txt in there?

no

winged bone May 23, 2025, 11:09 PM

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there's this one but its outside src

shy nebula May 23, 2025, 11:09 PM

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The purpose of the sample plugin is to create that file and it seems like it doesn't - your plugin would probably do something else :)

shy nebula May 23, 2025, 11:09 PM

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winged bone there's this one but its outside src

ok yes if the touch.txt wasn't created by you, it means the plugin worked

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but idk why the test didn't work lol

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So you have a working plugin - but the test seems to have some issues

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If in doubt, blame someone/something else - so I blame ... Windows!

winged bone May 23, 2025, 11:11 PM

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winged bone i created one in`src/it/simple-it/touch.txt` and it did get pasted in the target

no that was generated by maven when i put the touch.txt here

winged bone May 23, 2025, 11:12 PM

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winged bone there's this one but its outside src

i deleted this and reran mvn -Prun-its verify and now it doesnt get generated

shy nebula May 23, 2025, 11:12 PM

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winged bone i deleted this and reran `mvn -Prun-its verify` and now it doesnt get generated

Can you run mvn -Prun-its clean verify?

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that should delete all the output files first

winged bone May 23, 2025, 11:14 PM

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it says it cant find the file

shy nebula May 23, 2025, 11:16 PM

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Can you select your main project pom.xml and run that command again?

winged bone May 23, 2025, 11:17 PM

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oh ok now it runs

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same error from test fail as before tho, no file found in target/..

shy nebula May 23, 2025, 11:20 PM

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Now what exactly is in target?

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specifically target/its/simple-it/target

winged bone May 23, 2025, 11:21 PM

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theres no target/its/simple-it/target folder

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ughh i need to go to sleep... i'll look for another approach tomorrow or maybe even how to make a gradle plugin.
I appreciate the help so far tho, thank you very much

shy nebula May 23, 2025, 11:23 PM

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you could running mvn install and then trying again

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good night

winged bone May 23, 2025, 11:24 PM

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thanks ❤️

#creating maven plugin