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From David Blevins <david.blev...@visi.com>
Subject Re: gbuild: need up with eclipse tools setup?
Date Tue, 24 Jan 2006 00:58:52 GMT
On Jan 17, 2006, at 5:52 AM, Sachin Patel wrote:

> I was tired of seeing all the BUILD FAILED errors so I disabled it  
> temorarily due to the one svn issue that keeps on appearing stating  
> a resource already exists when it updates.
>
> I know what exactly scenario triggers the error, and I'll probably  
> need your help debugging it.
>
> The problem is the following, perhaps you can make some sense out  
> of it...
>
> I have a project that consists of autogenerated EMF code. Most of  
> the generated code is not source controled and is created only  
> during the build.  In EMF, any generated class can be modified by  
> the developer to contain custom implementations of a method.  A  
> methods custom implementation can be preserved by adding a  
> @generated NOT comment on that method.  The next time the generator  
> is run, that method implementation is not overridden.
>
> So for all the classes where I do have custom implementations I  
> check only those into source control.  Anytime these source files  
> are committed, GBuild fails during the update stating the given  
> class already exists.
>
> So what happens on the gbuild end is the following...
>
> (1) An initial fresh checkout of the code
> (2) The plugin builds successfully, so there exist in the work  
> directory a file "N" that was generated during the build.
> (3) Now I end up making a custom changes to  "N" locally and commit.
> (4) GBuild does an update, but since the generated code never was  
> removed, "N" exists but the delta from the commit is "N" as well so  
> it complains that "N" is already there. Only if the existing  
> generated "N" from the previous build was removed, would the update  
> for the committed "N" work.
>
> Does that make sense?
>

I follow, though I'm not sure why you'd set it up that way.  Anyone  
who attempts to work with you on the eclipse tooling will run into  
the same issue when they checkout.

Why don't you separate the generated source from the once-generated  
source?  In the main geronimo build we code generate tons and tons of  
xmlbeans classes and whatnot right into the target/ directory so they  
are never generated on top of anything that is scm controlled.

Mixing build-time generated code in with your regular source doesn't  
seem like the best approach.  Not sure what kind of constraints you  
are working with but at the very least you can keep them separate and  
do some footwork to compile the class files into the same dir.


-David


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