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http://jira.codehaus.org/browse/MNG-2486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_104077
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Jason Dillon commented on MNG-2486:
-----------------------------------
Copying my comments from MNG-2796
IMO, maven should *never* change the value of ${pom.version} ... if a pom says:
{code}
<project>
...
<version>1.2-SNAPSHOT</version>
...
</project>
{code}
Then ${pom.version} should *always* resolve to {{1.2-SNAPSHOT}}. If you need to
know what the _timestamp-build_ version is then I suggest adding
${pom.effectiveVersion} which can change dynamically.
Also, I can hear this coming... "why don't you use <dependencyManagement>...".
This feature of Maven is great for managing _external_ dependencies, but for
internal module management it becomes unmanageable quickly.
For Geronimo, we have ~200+ modules and to enumerate each one of those in a
<dependencyManagement> is unruly, and tends to become unmaintained quickly. Its
much easier to use <version>${pom.version}</version> in poms when defining
dependencies sibling modules.
But, as noted by David, this won't work when dealing with snapshots as when
deploying a snapshot, the module being deployed will have its ${pom.version}
changed magically to the _timestamp-build_ version which is going to produce
invalid dependencies, since the dependencies using
<version>${pom.version}</version> now have invalid versions (using the deployed
modules _timestamp-build_ version not the _timestamp-build_ version of the
dependency.
I really think the best way to handle this is to never change the value of
${pom.version} and introduce a ${pom.effectiveVersion} which will dynamically
change.
* * *
I'd really, really really really, really like to see this get fixed sooner
rather than later. I think a pom.version that doesn't change and a
pom.effectiveVersion that does change (to reflect the SNAPSHOT's
timestamp-buildnumber) would be a fine solution... *hint* *hint*
> ${project.version} evaluated to timestamped version if referring to SNAPSHOT
> ----------------------------------------------------------------------------
>
> Key: MNG-2486
> URL: http://jira.codehaus.org/browse/MNG-2486
> Project: Maven 2
> Issue Type: Bug
> Components: Dependencies, Inheritance and Interpolation, POM
> Affects Versions: 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.1-alpha-1
> Reporter: John Casey
> Priority: Critical
> Fix For: 2.0.8, 2.1-alpha-1
>
>
> when projects specify dependencyManagement sections with a shorthand version
> notation using the current project version (using ${project.version}) the
> version resolved will be that of the POM in which the dependencyManagement
> section is specified. If this POM is a snapshot, these dependency
> specifications will get the timestamp/buildnumber of that POM, instead of the
> actual one used when the dependency it references gets deployed.
> We should look at strategies for limiting or eliminating this practice, or
> else (somehow) pulling the real timestamp/buildnumber for that artifact from
> the reactor...in order to make these deps transitively resolvable for users.
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