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From "Michael Pilquist (JIRA)" <j...@codehaus.org>
Subject [jira] Created: (MSITE-484) Support adding and overriding report plugins in new maven-site-plugin 3.x reportPlugins configuration format
Date Wed, 02 Jun 2010 17:50:12 GMT
Support adding and overriding report plugins in new maven-site-plugin 3.x reportPlugins configuration
format
------------------------------------------------------------------------------------------------------------

                 Key: MSITE-484
                 URL: http://jira.codehaus.org/browse/MSITE-484
             Project: Maven 2.x Site Plugin
          Issue Type: Bug
          Components: inheritance
    Affects Versions: 3.0-alpha-1
         Environment: 3.0-beta-1-SNAPSHOT
            Reporter: Michael Pilquist
         Attachments: site-cfg-inheritance.zip

When using the new configuration format for reportPlugins, it appears that there's no way
to:
- Add a report plugin to a submodule
- Override the configuration of a report plugin in a submodule

Using the old <reporting> section, both of these use cases were supported.  For large,
multi-module builds, it is problematic having to respecify all reporting plugins in any submodule
pom that needs to either add an additional reporting plugin or change the configuration of
a reporting plugin.

Attached is a sample project that has a parent POM configured with project-info-reports and
javadoc plugin and a submodule configured with jxr plugin and javadoc plugin.  The relevant
output is here:
{code}
[INFO] ------------------------------------------------------------------------
[INFO] Building parent 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.3:clean (default-clean) @ parent ---
[INFO] Deleting file set: /Users/mpilquist/Downloads/site-parent-issue/target (included: [**],
excluded: [])
[INFO] 
[INFO] --- maven-site-plugin:3.0-beta-1-SNAPSHOT:site (default-site) @ parent ---
[INFO] configuring reportPlugin org.apache.maven.plugins:maven-project-info-reports-plugin:2.2
[INFO] configuring reportPlugin org.apache.maven.plugins:maven-javadoc-plugin:2.6.1
...
[INFO] ------------------------------------------------------------------------
[INFO] Building parent-usage-test 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.3:clean (default-clean) @ parent-usage-test ---
[INFO] 
[INFO] --- maven-site-plugin:3.0-beta-1-SNAPSHOT:site (default-site) @ parent-usage-test ---
[INFO] configuring reportPlugin org.apache.maven.plugins:maven-jxr-plugin:2.1
[INFO] configuring reportPlugin org.apache.maven.plugins:maven-javadoc-plugin:2.6.1
{code}

Looking at the maven-site-plugin code, it appears the the reportPlugins parameter is just
a regular array parameter.  AFAIK, there's no way to merge list configuration items.  Other
plugins have worked around this by defining additional mojo parameters (e.g., maven-eclipse-plugin
and buildCommands / additionalBuildCommands -- http://maven.apache.org/plugins/maven-eclipse-plugin/eclipse-mojo.html).
 This isn't the most flexible option though as it only solves 1 level inheritance.

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