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Posted to dev@maven.apache.org by Andy DePue <an...@marathon-man.com> on 2007/02/28 02:03:46 UTC

Bug? Maven always rebuilds .jar because of pom.properties

I've been moving a (multi module) project over to maven 2 and notice 
that whenever I execute:
  mvn install
Each module's .jar is rebuilt, even if nothing has changed.  I turned on 
debug output, and I can see the reason why:
  [DEBUG] isUp2date: false (Input file /...path to 
module.../pom.properties is newer.)

After googling, I've discovered that pom.properties is a file that is 
temporarily created by maven to be included in the resulting .jar 
artifact.  It is also automatically deleted by maven before the build 
finishes.  This means that pom.properties will ALWAYS be newer than the 
module's artifact (since it is automatically generated on every build), 
which means the .jar will ALWAYS be rebuilt.  In a large build (such as 
mine), the overhead of re-jaring every module can be significant.
Is this a bug, or am I missing something here?

Thanks,
  Andy

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Re: Bug? Maven always rebuilds .jar because of pom.properties

Posted by Jochen Wiedmann <jo...@gmail.com>.
On 2/28/07, Andy DePue <an...@marathon-man.com> wrote:

> Each module's .jar is rebuilt, even if nothing has changed.  I turned on
> debug output, and I can see the reason why:
>   [DEBUG] isUp2date: false (Input file /...path to
> module.../pom.properties is newer.)

Thanks for detecting this, I was always annoyed by the problem, but
never took the time to evaluate it. I have filed a patch at

    http://jira.codehaus.org/browse/MNG-2854

Jason, any chance to get this into 2.0.6?


Thanks,

Jochen



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