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http://jira.codehaus.org/browse/MNG-3565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=172880#action_172880
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denis dudinski commented on MNG-3565:
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This problem has big influence on our project. We have around one hundred
modules that participate in build. All this amount is divided into three sub
modules: web application, external services application and data processing
application. All three subprojects have links to some amount of common modules
that are our framework. There are three big teams that want to checkout and
build only their part of owerall project. And here things go right. But also it
is needed to build aggregate project that consists from all three application.
Because of common modules we cannot simply go to high level pom.xml and type
"mvn install" and aquire package with three applications included along with
some other specific build logic. Also we cannot properly collect db creation
scripts for our application since our db scripts are distributed among
functional modules in all three sub projects. Assembly plugin will not be
started because of "Project '..:child2' is duplicated in the reactor" exc
eption.
Dependency graph:
subproject 1 ----->
| |
superparent ----> framework module--------->other framework
module
| |
subproject 2------>
We cannot exclude framework modules from build.
> Maven shouldn't error if a module appears twice in the reactor
> --------------------------------------------------------------
>
> Key: MNG-3565
> URL: http://jira.codehaus.org/browse/MNG-3565
> Project: Maven 2
> Issue Type: Improvement
> Components: Bootstrap & Build
> Affects Versions: 2.0.9
> Reporter: Ittay Dror
> Fix For: 2.1.x
>
>
> parent
> \-----child1
> \-----child2
> \-- many more modules...
> parent contains child1 and child2 modules
> child1/pom.xm contains '<module>../child2</module>'
> now if i cd into child1 and build, child2 is built before it. good. but if i
> run from the top directory i get:
> Project '..:child2' is duplicated in the reactor
> Note: the reason not to always run from top is that there are many modules,
> which are not interrelated, so developer shouldn't wait while another set of
> modules (maintained by another build) is built (even if nothing gets done,
> it still takes time).
> Why not just remove duplicates before sorting?
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