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Date: Sat, 13 Mar 2010 01:31:27 +0000 (UTC)
From: "Alejandro Abdelnur (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-6629) versions of dependencies should be
 specified in a single place
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    [ https://issues.apache.org/jira/browse/HADOOP-6629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12844793#action_12844793 ] 

Alejandro Abdelnur commented on HADOOP-6629:
--------------------------------------------

Maven allows you do to all that, via project types and assemblies. Look for example at Glassfish, they use Maven.

It would not be that difficult to mavenize Hadoop. 

The catch is that the directory structure of the source would have to change to use Maven layout. 

But there are many things you get out of Maven for free. 

IMO is worth the move.

> versions of dependencies should be specified in a single place
> --------------------------------------------------------------
>
>                 Key: HADOOP-6629
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6629
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: build
>            Reporter: Doug Cutting
>            Assignee: Doug Cutting
>         Attachments: HADOOP-6629.patch, HADOOP-6629.patch
>
>
> Currently the Maven POM file is generated from a template file that includes the versions of all the libraries we depend on.  The versions of these libraries are also present in ivy/libraries.properties, so that, when a library is updated, it must be updated in two places, which is error-prone.  We should instead only specify library versions in a single place.

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