We've put in place the first half of this by adding these goals to our 
maven builds:

versions:use-releases scm:checkin

The former will update a pom to use released versions of snapshot 
dependencies.  The latter commits any resulting changes to the pom.xml.  We 
also use the "includesList" parameter to limit the release check to our own 
libraries.  See this 
page<http://mojo.codehaus.org/versions-maven-plugin/use-releases-mojo.html>for 
info regarding this goal and plugin.

Some caveats to this approach:

1.  If the pom.xml uses a property to define the dependency version (i.e. 
"<version>${defined.elsewhere}</version>"), the versions plugin will not 
update the version.
2.  The versions plugin only scans the module's <dependencies> list.  If 
you have a parent-pom declaration whose version is set to a SNAPSHOT, it 
will not update it.

I'd have reservations, I think, with the exact workflow you've described, 
as it might lead to unintended releases.  However, if you started from the 
most-dependent module (i.e. the webapp or application you want to release), 
and then calculated what upstream dependencies needed to be released, that 
would be ideal.  Just because I've released some base library upon which 20 
apps depend does not mean I want to cut a release of those 20 apps.






On Tuesday, February 26, 2013 1:06:16 AM UTC-5, Andrei Pozolotin wrote:
>
>                    Hello, there!
>
> I am curious : "How to better manage cascading releases"
> for the following use case and what you think about possible solution:
>
> #################################
> Releasing core bundles and dependent bundles 
>
> Changing the API of a core bundle for an application requires a rebuild of 
> everything down the line in order to use the new feature. For projects with 
> large numbers of modules (platform, news) this is a very lengthy process of 
> splitting the bundles into dependency phases, then for each phase, 
> releasing a new version of each bundle, updating the next phase's bundles 
> with the newly released versions, and then releasing next phase's bundles, 
> etc, etc. This can be a multiple hour process with Jenkins, compounded by 
> the fact that you can only release one sub-project at a time in a Git 
> repository to avoid push conflicts causing the build to fail. This process 
> occurs much more frequently than I would have originally assumed. Right now 
> I have a bash script that attempts to automate this for news with a 
> combination of the maven release and version plugins, but a better generic 
> solution would be very welcome.
>
> *Proposal: Modify Jenkins maven release plugin with the following 
> behavior:*
>
>    1. 
>    
>    Add a "Cascade release dependent projects" checkbox on release page
>     2. 
>    
>    After the release completes, look for jobs that are explicitly 
>    dependent on the pre-release snapshot version
>     3. 
>    
>    Update these dependent modules with the newly release version, and 
>    trigger a Maven release on them as well
>     4. 
>    
>    Failing releases should be skipped, and then trigger a build failure 
>    at the very end, with clearly noted messages as to which sub-tree failed 
> so 
>    the user can check the logs and manually cascade release the subtree
>     
> Step c) would need some cycle detection to support scenarios where B and C 
> depend on A, but C also depends on B - both A and B would have to be 
> released before C could be released.
> #################################
>
> Thank you, 
>
> Andrei
>
>  

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