[ARCHETYPE-498] Ability to use properties in include and exclude pattern in fileset

**[Olivier GUILLET](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=olivguillet)** opened **[ARCHETYPE-498](https://issues.apache.org/jira/browse/ARCHETYPE-498?redirect=false)** and commented

Give user the ability to use maven properties in fileset include / exclude pattern.

In methodProcessTemplate of class `org.apache.maven.archetype.generator.DefaultFilesetArchetypeGenerator`, line 770 (in version 2.4).
Adding this lines:

```
FileSet fileSet = iterator.next();
count++;
if ( fileSet.getIncludes() != null && !fileSet.getIncludes().isEmpty() )
{
final List includes = new ArrayList();
for ( String include : fileSet.getIncludes() )
{
includes.add( replaceFilenameTokens( include, context ) );
}
fileSet.setIncludes( includes );
}
if ( fileSet.getExcludes() != null && !fileSet.getExcludes().isEmpty() )
{
final List excludes = new ArrayList();
for ( String exclude : fileSet.getExcludes() )
{
excludes.add( replaceFilenameTokens( exclude, context ) );
}
fileSet.setExcludes( excludes );
}
```

is really usefull for conditional archetype generation !

So in `archetype-metadata.xml`

```

${artifactId.substring(0,1)}

src/main/resources/directory>

__base-name__*.*

```

---

**Affects:** 2.4

Start at methodProcessTemplate in org.apache.maven.archetype.generator.DefaultFilesetArchetypeGenerator, using the issue’s archetype-metadata.xml example as the expected input. Trace how fileset includes and excludes are processed and how filename tokens are resolved. Done means Maven properties can control both patterns for conditional archetype generation, with coverage added wherever this generator is tested.

Written by the indexing model from the issue text.