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From "Alexey Varlamov" <alexey.v.varla...@gmail.com>
Subject Re: Breaking the build again (was Re: [announce] new DRLVM build system came into force)
Date Thu, 07 Feb 2008 10:39:19 GMT
2008/2/7, Tim Ellison <t.p.ellison@gmail.com>:
> Alexey Varlamov wrote:
> >> I have a natural aversion to svn:externals since it messes up the SVN
> >> version control.  When you copy a resource with an externals property to
> >> a new branch, the branch has a copy of the property (not what it points
> >> to).  This makes it too easy to modify the HEAD when you think you are
> >> working on a branch, and makes the branch mutable from the HEAD.
> >
> > The SVN manual covers this issue; they say "commit" command
> > specifically ignores external subdirectories unless they are
> > explicitly pointed.
> Right, but unless you know you are in an externals subdirectory it is
> too easy to, say, cd into the java 6 branch class lib concurrent module
> standard directory and make a change that gets picked up by the java 5
> branch.  We know about that case, but if there are a lot of externals
> pointing around the place you can miss these hidden dependencies.

Using HTTP protocol should be good enough preventive measure for us.
BTW I recall Chris complained once that he had troubles checking out
HTTPS-based externals in a HTTP-based workspace, I think we should fix

> > BTW similar issue may happen in a "mixed" workspace with
> > subdirectories switched to different branches.
> Yes, and for the same reason I would also be unhappy if we switched at
> levels below the working_* directories.  It just gets too hard to manage
> multiple branches of the code.
> Regards,
> Tim

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