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From Rick Hillegas <rick.hille...@oracle.com>
Subject heads up: about to check in a potentially disruptive change to the build
Date Wed, 22 Sep 2010 13:09:39 GMT
I am about to check in a patch which has been evolving on DERBY-3986. 
Please see that issue for a detailed discussion of this work. This patch 
makes the following high level changes:

1) Introduces a new artifact directory called "generated", which lives 
parallel to the classes, jars, and javadoc directories already created 
by the build machinery. This new directory is the root of a tree where 
the build puts generated java files and other artifacts which do not fit 
tidily into the existing classes, jars, or javadoc directories.

2) Introduces a new variable ${out.base} which you can customize in your 
ant.properties or on the command line. ${out.base} is the base directory 
for all build artifacts. It defaults to be ${basedir}. That means that 
if you do not customize ${out.base}, then most of your build artifacts 
(including classes, jars, and javadoc) will continue to be dropped into 
the same locations where they are dropped today. If you do customize 
${out.base}, then all of the following artifacts will be dropped into 
the ${out.base} directory:


I'm hoping that these changes won't break anyone's build. But given the 
complexity of Derby's build I can't make any guarantees--so please let 
me know as soon as possible if you encounter a problem.

Before syncing with the mainline, I recommend that you first "ant 
clobber" your subversion client. That should remove the build artifacts 
which are currently dropped into the source tree. Then you can sync and 
build. As a sanity check, you might want to run an "ant status" 
afterward to see if there are any artifacts lingering in your source 
tree. So here's how I recommend that you manage your next sync:

ant clobber
svn update
svn status

Again, please let me know if you encounter any problems.


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