canonicalize svn paths even more awesomely It turns out that SVN has bizarre path canonicalization rules that are sort of close to what urllib.quote does, but different in peculiar ways, and 1.7 suddenly cares deeply about canonicality. For instance, space (' ') maps to %20, but '~' stays unchanged instead of turning into %7e. Along with its new policy of frequent beatings administered to users of its bindings, SVN 1.7 introduces a function that idempotently canonicalizes URIs, which I found sort of by accident, because that's how you learn about SVN API changes. Older versions of SVN are less anal, so urllib.quote continues to work fine for them.

#!/bin/bash
#
# Generate branchtagcollision.svndump
#
# Generates an svn repository with a branch and a tag that have the same name.


mkdir temp
cd temp

svnadmin create testrepo
svn checkout file://`pwd`/testrepo client

cd client
mkdir trunk
mkdir branches
mkdir tags

svn add trunk branches tags
svn commit -m "Initial commit"

echo "fileA" >> trunk/fileA
svn add trunk/fileA
svn commit -m "Added fileA"

svn cp trunk branches/A
svn commit -m "added branch"

echo "fileB" >> trunk/fileB
svn add trunk/fileB
svn commit -m "Added fileB"

svn cp trunk tags/A
svn commit -m "added bad tag"

cd ..
svnadmin dump testrepo > ../branchtagcollision.svndump