Re: [m2] ant plugin mojo refering to maven ProjectHelper

[Martin van der Plas]

Hi John,

Thanks for your reply. I figured out that the actual reference is 
injected by org.codehaus.plexus.component.factory.ant.AntScriptInvoker 
into the ant project with

   references.put(rd.getRole() + "_" + rd.getRoleHint(), rv);

In my case getRoleHint returns null, so the ant project reference  is
   
getProject().getReference("org.apache.maven.project.MavenProjectHelper_null");

I could not find out how to set the rolehint in my <mojo>.mojo.xml file.
I tried:   
   ...
     <components>
       <component>
         <role>org.apache.maven.project.MavenProjectHelper</role>
         <hint>projectHelper</hint>
       </component>
     </components>
   ...

But this seemed not to be  picked up.
I got the impression that the component setting was not used at all.
What helped me was to define a parameter as in
      ...
       <parameter>
         <name>projectHelper</name>
         <property>projectHelper</property>
         <required>true</required>
         <readonly>true</readonly>
         
<expression>${component.org.apache.maven.project.MavenProjectHelper}</expression>
         <type>org.apache.maven.project.ProjectHelper</type>
         <description>maven project helper object</description>
       </parameter>
   ...

The latter was translated into an requirement section in 
classes/META-INF/maven/plugin.xml:
   ...
    <requirements>
       <requirement>
         <role>org.apache.maven.project.MavenProjectHelper</role>
         <field-name>projectHelper</field-name>
       </requirement>
     </requirements>
   ...

Can you help  me out here?

Thanks.

Martin


John Casey wrote:

Inside your task, you'll need to use

getProject().getReference("org.apache.maven.project.MavenProjectHelper")

IIRC.

If that doesn't work, let me know, and I'll dig around in the code.

-john
Martin van der Plas wrote:

Hi,

According to 
http://maven.apache.org/guides/plugin/guide-ant-plugin-development.html 
it is possible to define plexus components.
The hint does not describe how the component needs to be refered to.

I would like to use the maven ProjectHelper  in an anttask. How can I 
pass the ProjectHelper object to my task?

Thanks.

Martin


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