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From "Jon Reeve (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IVY-899) POM packaging not always mapped to main artifact file extension correctly
Date Wed, 16 May 2012 15:09:02 GMT

    [ https://issues.apache.org/jira/browse/IVY-899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13276795#comment-13276795
] 

Jon Reeve commented on IVY-899:
-------------------------------

It seems that the Jetty problem isn't really through any fault of Ivy, and more to do with
Jetty abusing the packaging type and putting in some new unknown one when their end result
is in fact a jar.

At the moment it is possible to work around this if one goes through every jar that fails
to download one at a time and adds an explicit dependency for it with an artifact element
specified to map type="orbit" to ext="jar". But our project doesn't have a real direct dependency
on that jar - it's indirect. If we add one it means we have to keep it up to date to match
whatever one is pulled in by something else we do depend on - whenever we change the version
of that dependency that depends on Jetty, there is a risk that all the orbit->jar fixing
dependency entries are now pointing at the wrong versions.

With that in mind, I think a feature to specify custom mappings would be incredibly useful,
so users of Ivy would be able to quickly work around these simple cases with a mapping to
tell Ivy that "orbit->jar", i.e. packaging type orbit should be considered as jar, for
all dependencies. Would a patch for that be considered?
                
> POM packaging not always mapped to main artifact file extension correctly
> -------------------------------------------------------------------------
>
>                 Key: IVY-899
>                 URL: https://issues.apache.org/jira/browse/IVY-899
>             Project: Ivy
>          Issue Type: Bug
>          Components: Maven Compatibility
>    Affects Versions: 2.0.0-beta-2
>            Reporter: Tom Widmer
>
> POM files contain a packaging element that Ivy attempts to map to an extension for the
main artifact of the module in question. In 2.0.0beta2, it maps as follows:
> ejb->jar
> bundle->jar only for org.apache.felix#maven-bundle-plugin
> [other]->[other]
> That mapping is not sufficient to cover common POM files. For a start:
> 1. maven-plugin is a standard packaging type, which should map to the extension jar.
>  - e.g. Ivy erroneously searches for 
> org.apache.axis2#axis2-ant-plugin;1.4.1!axis2-ant-plugin.maven-plugin 
> rather than: 
> org.apache.axis2#axis2-ant-plugin;1.4.1!axis2-ant-plugin.jar
> 2. bundle seems to be used by various things, and is a jar in the cases I've seen:
> org.apache.geronimo.specs#geronimo-activation_1.1_spec;1.0.1!geronimo-activation_1.1_spec.bundle
> should be
> org.apache.geronimo.specs#geronimo-activation_1.1_spec;1.0.1!geronimo-activation_1.1_spec.jar
> Also, apparently POMs can have custom packaging which might need to map to some other
arbitrary file extension, or possibly potentially to multiple files?
> The ideal solution is to provide customisable mapping of POM packaging to file extensions
that can be specified somewhere in the Ivy settings (it is somewhat similar to namespaces).
> An interim solution is to change the mapping as follows:
> ejb->jar
> ejb[N]->jar?? e.g. ejb3->jar
> maven-plugin->jar
> bundle->jar if and only if .bundle does not exist but .jar does (it may not be easy
to check for file existence in the relevant code - I'd be happy to always map bundle to jar,
but others might not be - might be fine for an interim solution though?).
> [other]->[other]
> The interim solution could perhaps be done for 2.0 (it is only a few minutes work I think),
though the properly customisable solution might take longer than that.

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