[jboss-jira] [JBoss JIRA] Commented: (JBBUILD-548) Building a submodule and what it depends on

[Paul Gier (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBBUILD-548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12486628#action_12486628 ] 

Paul Gier commented on JBBUILD-548:
-----------------------------------

I think the reactor mode options in maven 2.1 and above solve this problem to the extent that is needed.

http://docs.codehaus.org/display/MAVEN/Make+Like+Reactor+Mode

> Building a submodule and what it depends on 
> --------------------------------------------
>
>                 Key: JBBUILD-548
>                 URL: https://jira.jboss.org/jira/browse/JBBUILD-548
>             Project: JBoss Build System
>          Issue Type: Task
>          Components: Sonatype
>            Reporter: Paul Gier
>
> From Max's email:
> The biggest issue is that we cannot seem to figure out how Maven is supposed to work when it comes to projects that consists of sub-modules. At least the workflow Maven 'defaults' to seem to make this construct very cumbersome to maintain.
> Example:
> --------------
> In hibernate core we have a structure like this:
> trunk
>  pom.xml
>  parent
>   pom.xml
>  core
>   pom.xml
>  connection-c3p0
>   pom.xml
> <other modules>
> <pom.xml per module>
> Lets say we change something in the "core" module and I wan to go and check if connection-c3p0 has an issue with that.
> Our intuition says that one should be able to do:
> cd connection-c3p0
> mvn compile
> But this will not cause core to be recompiled even though this module has a dependency on it and it should be possible for maven
> to deduce this needs to be compiled. Instead it goes to the local repo and check if something happend there - and no there didn't, we are just trying to do a compile check.
> On the blog someone mentioned reactor or the new -amd option, but doing the following:
> cd connection-c3p0
> mvn -amd compile
> does not seem to change anything, even with a change in core nothing gets recompiled.
> What -amd does seem to do is the "opposite" direction. i.e. going to root and type
> mvn -am -pl core,connection-c3p0 compile
> does seem to do this - but why does the user have to tell Maven manually which dependencies it want built ? 

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