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From Allan Ramirez <arami...@exist.com>
Subject Re: [m2] Archetype Plugin parameters and templates
Date Thu, 29 Sep 2005 09:33:06 GMT

Eric Jacob wrote:

>Hi Jason,
>
>Thanks for your fast answer. However, I took a look at the "
>maven-archetype-quickstart-1.0-alpha-3.jar" in my local repository and I saw
>no velocity templates... Here where I looked:
>
>%USER_HOME%\.m2\repository\org\apache\maven\archetypes\maven-archetype-quickstart\1.0-alpha-3
>  
>

If you have the source copy,  you can able to see that 
maven-archetype-quickstart is a velocity template.

>Is it possible to provide a sample or a link to a velocity template on the
>online source repository?
>  
>

Im not really sure about this, but I think its not possible.

>Thank you in advance,
>
>Eric
>
>On 9/27/05, Jason van Zyl <jason@maven.org> wrote:
>  
>
>>On Mon, 2005-09-26 at 21:49 -0400, Eric Jacob wrote:
>>    
>>
>>>Hi,
>>>
>>>The M1 Genapp plugin offers the possibility to define custom parameters
>>>      
>>>
>>and
>>    
>>
>>>templates... So here my questions about the M2 Archetype plugin:
>>>
>>>(1) Does it offer the same possibilities?
>>>      
>>>
>>Yes, the templates for a archetype are actually velocity templates so
>>more flexible then what's in genapp.
>>
>>    
>>
>>>(2) Is it possible to prompt the user for the parameter's value?
>>>      
>>>
>>Archetypes were designed to do that. The parameters can come from
>>anywhere as long they end up in a Map. The Map is used when rendering
>>the velocity templates to parameterize the output.
>>
>>I would like to do more work on the archetypes in order to provide some
>>metadata about the parameters for a particular archetype so that better
>>UI tools can be made. But even with that being the case there is reason
>>why you couldn't make a UI for the generation of a project from an
>>archetype.
>>
>>    
>>
>>>(3) Where should I start to build my own template?
>>>      
>>>
>>You can look at the existing archetypes which are simply JARs that
>>contain velocity templates and some metadata about what is actually in
>>the archetype. I will add some doco to the getting started guide about
>>archetypes as I think there is little known about them but they are
>>going to be highly useful.
>>
>>If you follow the current getting started guide and create a project:
>>
>>m2 archetype:create -DgroupId=com.mycompany.app -DartifactId=my-app
>>
>>This will actually download the archetype to your local maven repository
>>and you can take a look at it. It will be in:
>>
>>$repo/org/apache/maven/archetypes/maven-archetype-quickstart/1.0-alpha-3
>>
>>    
>>
>>>(4) Finally, how to add a specific "script/behaviour" to a template in
>>>      
>>>
>>M2?
>>
>>The templates are velocity templates so you get the directives that
>>velocity provides and you can make your own velocity macros or tools. A
>>tool is simply a Java object that you drop into a velocity context so
>>you can really do whatever you want. I would think velocity itself would
>>give you enough flexibility.
>>
>>    
>>
>>>Thanks,
>>>
>>>Eric
>>>      
>>>
>>--
>>jvz.
>>
>>Jason van Zyl
>>jason at maven.org <http://maven.org>
>>http://maven.apache.org
>>
>>In short, man creates for himself a new religion of a rational
>>and technical order to justify his work and to be justified in it.
>>
>>-- Jacques Ellul, The Technological Society
>>
>>
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>>
>>
>>    
>>
>
>  
>
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