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https://issues.apache.org/jira/browse/MPLUGIN-350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16831762#comment-16831762
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Robert Scholte commented on MPLUGIN-350:
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for example: maven-compiler-plugins outputDirectory (target/classes) is the
input of maven-jar-plugin. By being explicit about the input and output we can
do smart things at Maven level. In this case it means that maven-jar-plugin
must always be executed after maven-compiler-plugin.
Only if all inputs of a plugin have been processed as output of other plugins,
this plugin can be executed.
> Split @Parameter into @Input and @Output
> ----------------------------------------
>
> Key: MPLUGIN-350
> URL: https://issues.apache.org/jira/browse/MPLUGIN-350
> Project: Maven Plugin Tools
> Issue Type: New Feature
> Reporter: Robert Scholte
> Priority: Major
>
> By knowing if parameters are input or output parameters, it is possible to
> improve our builds. It will be possible to create DAGs and chain the
> execution blocks much smarter.
> The Maven Extension created by Gradle heavily relies on this kind of
> information.
> It is probably easier to use new annotations instead of adding a (required)
> status-field to @Parameter
> Looking at the {{plugin.xml}} it looks quite easy to solve this and stay
> backwards compatible: the file looks now like:
> {code:xml}
> <parameters>
> <parameter>
> ...
> </parameter>
> </parameters>
> {code}
> With plexus-magic the following should still work:
> {code:xml}
> <parameters>
> <input>
> ...
> </input>
> <output>
> ...
> </output>
> </parameters>
> {code}
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