what's a "trail url"?

svnversion accepts up to two parameters. The first is WC_PATH; I get
that. The second is TRAIL_URL; what's that? Yes, I see in the
embedded docissimal that it's "the trailing portion of the trunk
URL," but how much of the trunk URL, and what if I'm asking for
svnversion info on a branch, and anyway what's it do with that info
anyway, huh?

By experiment, I find that, at least in my present WC, providing
TRAIL_URL enables it to know that the WC has been "S"witched (a true
claim). But I'm just not getting the overall zeitgeist, here....

(And look, I didn't even bring up my inevitable whinage about how SVN
could determine the actual root of the repo by searching back up the
URL and not bother me about it, and computers are supposed to be the
servants of humans not the other way around, and ... oh ... wait ...
I was going to *not* bring that up, wasn't I?)

-- 
-==-
Jack Repenning
CollabNet, Inc.
8000 Marina Boulevard, Suite 600
Brisbane, California 94005
o: 650.228.2562
c: 408.835.8090
f: 650.228.2501
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