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RE: SVN Advice

From: Strike, Jeff <JStrike_at_bucyrus.com>
Date: Fri, 9 May 2008 10:07:31 -0500

> -----Original Message-----
> From: James Coleman [mailto:jamesc_at_dspsrv.com]
> Sent: Thursday, May 08, 2008 5:46 AM
> To: Strike, Jeff
> Cc: users_at_subversion.tigris.org
> Subject: Re: SVN Advice
> Strike, Jeff wrote:
> > We're currently in the process of upgrading our build and
> deployment
> > process for our Java environment, part of that means upgrading our
> > source control. Currently there is no build process in place and
> > there is one monolithic exploded deployment that actually has about
> > 10-15 different applications all using the same context
> root. (This is
> > a mixture of JSP applications and Struts applications) Currently
> > we're using a program called AccuRev for version control. When you
> > promote a file in AccuRev it goes to the DEV depot.
> (repository) Once
> > it's there someone can review the files and decide to push
> them to the server.
> > After they're tested the files are pushed to the next depot
> for QA and
> > so on. The pushing of files from one repository is a
> manual process
> > but it allows the person responsible for deployment to pick
> and choose
> > what files for which applications get pushed. Since everything is
> > deployed as one application this works out good if we have people
> > working on different applications at the same time. Starting with
> > this upgrade all new projects will be developed outside of the old
> > application as individual projects. We still need to
> maintain those
> > old applications until we separate them out into new
> applications or
> > they reach their end of life. I'd like to get rid of AccuRev and
> > replace it with SVN but not sure how we can use SVN to decide which
> > files need to go in the build and which don't.
> >
> > Example:
> > Dev A is working on App 1 and commits files to SVN Dev B & C are
> > working on App 2 and commits files to SVN so they share their work.
> > These are all in the same repository...how can I set this up
> so a build
> > script (Ant) will know which files to take the head version of and
> > which ones to get the previous revision (committed?) of?
> >
> > Thanks,
> > -Jeff
> >
> I think your question is more than just how to use svn but also how to

> reorganise your build env and process? Can the shared code be put into

> resuable libs? What can be seperated out as a different project and
> released to main project/other applications as a library.
> You could use svn:externals for managing versions of things
> that need to get caught up by your build process. (where
> thing can be just one file or dir of a
> component(library+includes+source+...)
> http://svnbook.red-bean.com/en/1.4/svn-book.html#svn.advanced.
> Probably best to use these for things that can really be
> managed seperately from the project they are use as an
> svn:external in.
> Good example of this is in the TortoiseSVN svn repository here:
> http://tortoisesvn.tigris.org/svn/tortoisesvn/trunk/ext/
> Subversion, apr, ...
> You could probably use branches/tags to control different
> versions of files
> being released for review or deployment. So your build script
> doesn't have to mess
> with checking out different versions.
> Dev A works on branches/DevA/
> Dev B and C work on branches/DevBC/
> you should have trunk/ which has a baseline of your software
> You could maybe have branches/development and branches/testing
> Dev B&C checkin and "svn up" to get other's changes.
> When changes are ready for everyone they merge to
> branches/development for review
> Changes on branches/development merge to branchres/testing when ready.
> Changes on branches/testing finally merge to trunk when finished.
> Branches must merge again from trunk to get latest trunk
> changes when they are ready.
> Disclaim! I don't know enough at all about how you work to
> know if this really would suit you!
> The CVS redbook has a nice chapter on using branches.
> http://cvsbook.red-bean.com/cvsbook.html#Going%20Out%20On%20A%
> 20Limb%20(How%20To%20Work%20With%20Branches%20And%20Survive)
> Explains things much better than I could.
> The SVN book has lots of detail on working with branches:
> http://svnbook.red-bean.com/en/1.4/svn-book.html#svn.branchmerge
> Getting easier to do as svn 1.5 is coming:
> http://svnbook.red-bean.com/nightly/en/svn-book.html#svn.branchmerge
> I think you could find the management of the branches is
> manual and a bit tricky (at the start?).
> You would have to learn about how branches and merging works
> in svn before you could make a
> good decision on how to make it part of your process. Your
> users also of course
> would have to learn how to work with branches.
> Some features in the latest release of svn (merge-tracking)
> make merging more usable.
> We use trac http://trac.edgewall.org/ for bug/issue tracking
> and it also integrates with
> svn and provides view on repository showing svn logs, browse
> source, compare revisions, ...
> James.
> This email has been scanned by the MessageLabs Email Security System.

Thanks for the info, I have the link for the svnbook and I've been
reading through that. I'll dig through the CVS chapter on branching.
Branching is something we've discussed here but I think it's only going
to get us 90% of the way there. The other 10% is probably just going to
be us establishing procedures and methods for what we push and when.


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Received on 2008-05-09 17:08:00 CEST

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