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From "Giridharan Kesavan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3305) Publish hadoop-core to the apache repository with an appropriate POM file
Date Thu, 27 Nov 2008 09:53:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12651305#action_12651305

Giridharan Kesavan commented on HADOOP-3305:

Thanks Steve for your comments!

{{Here is the approach to address point *1*}}

We have the top level libraries.properties and component level libraries.properties file.

In the component level libraries.properties file we can define version for dependencies whichever
has a different version of dependency than the one defined in the top level(or the global
libraries.properties file).

Other thing that I'm not sure is "How to decide on the version of components that doesn't
have the version # as part of their jar name?"

For example servlet-api.jar inside the chukwa/lib folder doesn't seem to have a version. This
is one such example , we have lot more like this.
We have different dependencies inside the Chukwa/lib which doesn't seem to have a version
# as well.
How do we define versions for them?

{{To answer the *2* point}}
I see that Chukwa is importing the hadoop/fs hadoop/io and hadoop/conf packages. Which means
that Chukwa depends on hadoop.
I looked at the smartfrog ivy files but coudn't make out the cross-referencing idea.  Could
you please elaborate on that

I would address comment *3* and *4* in my next patch.

Thanks again for you comments.

> Publish hadoop-core to the apache repository with an appropriate POM file
> -------------------------------------------------------------------------
>                 Key: HADOOP-3305
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3305
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: build
>    Affects Versions: 0.16.2, 0.16.3
>            Reporter: Steve Loughran
>            Priority: Minor
>         Attachments: HADOOP-3305.patch, hadoop-core-0.16.2.pom, ivy-support-first-pass.zip,
ivysupport.zip, rmlib.sh
> To let people downstream build/test with hadoop, using Apache Ivy or Apache Maven2 to
pull it down, hadoop-core needs to be published to the apache repository with a .pom file
that lists its mandatory dependencies.
> In an automated build process, this means
> -having a template XML pom defining all included dependencies (and excluded transient
dependency artifacts)
> -having a property file driving version numbering of all artifacts
> -copying this template with property expansion to create the release POM file
> -public releases only: sticking this POM file up on people.apache.org in the right place,
along with the JAR and some .md5 checksums
> There's a risk that if the hadoop team dont do this, someone else will (as mahout are
doing under http://people.apache.org/~kalle/mahout/maven2/org/apache/hadoop/ )
> This is bad as hadoop end up fielding the support calls from someone elses files. 
> Before automating the process, existing hadoop-core JARs can be pushed out with hand-encoded
POM files. The repository police dont allow pom files ever to be changed, so supporting existing
releases (.16.2, 0.16.3 ... ) is a way of beta testing the POMs. 

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