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https://jira.codehaus.org/browse/MDEP-426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=328551#comment-328551
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Ondrej Zizka commented on MDEP-426:
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This is the workaround I could omit if this was implemented.
http://code.google.com/p/jawabot/source/detail?r=8ef1738b1ea566204ef5c390d82e8e5dadef7d43#
> Add `ignoreIfNotExists` to dependency:unpack
> --------------------------------------------
>
> Key: MDEP-426
> URL: https://jira.codehaus.org/browse/MDEP-426
> Project: Maven 2.x Dependency Plugin
> Issue Type: New Feature
> Components: unpack
> Affects Versions: 2.8
> Reporter: Ondrej Zizka
>
> The {{dependency:unpack}} goal is often used to manage various files like
> (test) resources throughout a multimodule project.
> For example, to create a working directory, several artifacts may be unpacked
> into a {{workdir/}}.
> To configure this it is convenient to set up the goal in the root module.
> This works fine, except two things:
> 1) The root module itself would fail (as the deps don't exist yet)
> 2) The modules with the resources depend on themselves, i.e. creating a
> cyclic dependency.
> It would be very convenient if this was handled somehow.
> My suggestion to add a {{ignoreIfNotExists}} flag, which would just write an
> INFO log message and continue in case that the dependency doesn't exist yet.
> That way, users wouldn't have to explicitely enable the execution of the
> {{unpack}} goal for every single direct submodule.
> Thanks for considering.
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