[jira] (MRESOURCES-31) Dependency resolution for resource filtering

["Emeric MARTINEAU (JIRA)" <ji...@codehaus.org>]

    [ https://jira.codehaus.org/browse/MRESOURCES-31?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=332282#comment-332282 ] 

Emeric MARTINEAU commented on MRESOURCES-31:
--------------------------------------------

Hi,

you can't use :
{code}
${project.dependencies[0].artifactId}
${project.dependencies["org.mvel:mvel"].version}
{code}

Why ?

Two things.
You must make difference between, filtering (in file) and replace in pom.

In pom file, $\{project.dependencies[0].artifactId} work (exemple below) because, is use class called org.apache.maven.plugin.PluginParameterExpressionEvaluator that use org.codehaus.plexus.util.introspection.ReflectionValueExtractor that support index properties

{code:xml} 
<plugin>
	<artifactId>maven-antrun-plugin</artifactId>
	<executions>
		<execution>
			<phase>generate-sources</phase>
			<configuration>
				<tasks>
					<echo>${project.dependencies[0].artifactId}</echo>
				</tasks>
			</configuration>
			<goals>
				<goal>run</goal>
			</goals>
		</execution>
	</executions>
</plugin>
{code}

when your are in filtering, is use class org.codehaus.plexus.interpolation.PrefixedObjectValueSource that use org.codehaus.plexus.interpolation.ObjectBasedValueSource that org.codehaus.plexus.interpolation.reflection.ReflectionValueExtractor that not support index properties.
You can see that exemple :
{code} 
project.dependencies=${project.dependencies}
give :
project.dependencies=[Dependency {groupId=org.apache.maven, artifactId=maven-plugin-api, version=2.0.6, type=jar}, Dependency {groupId=org.apache.maven, artifactId=maven-model, version=3.0.5, type=jar}]

project.dependencies[0].artifactId=${project.dependencies[0].artifactId}
give :
project.dependencies[0].artifactId=${project.dependencies[0].artifactId}
{code} 

to change this way, org.apache.maven.shared.filtering.DefaultMavenFileFilter (method getReader) must be change.
I don't know if easy to change that (what are side effect ?).

Maybe someone of maven team may provide his point of view ?
                
> Dependency resolution for resource filtering
> --------------------------------------------
>
>                 Key: MRESOURCES-31
>                 URL: https://jira.codehaus.org/browse/MRESOURCES-31
>             Project: Maven Resources Plugin
>          Issue Type: Wish
>    Affects Versions: 2.2
>            Reporter: Daniel Holmen
>            Priority: Minor
>
> I've been trying to use the project.compileClasspathElements  property in a filtered resource, but discovered that Resources plugin isn't set up to require dependency resolution. The result of this is that i cannot use any of the classpath properties in my filtered resources.
> The solution is quite simple, just add a @requiresDependencyResolution annotation to ResourcesMojo. I have no idea if this causes any bad side-effects - but it seemed to work properly when I tested it locally.

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