svncommands: fix layering violation & tweak error messages. Importing `SubversionException' directly from `svn.core' is a layering violation: Anything within the Subversion bindings should only be accessed via svnwrap. The advantages to doing this are twofold: we only need to intercept missing bindings in one place, and we have the option of supporting alternate bindings. As an added bonus, the recently-added support for intercepting missing Subversion bindings actually works. Two error messages are tweaked to remove `It appears...' from one error message (just blaming Subversion instead) and make both errors include the URL in the suggested command line.

#!/bin/sh
# inspired by Python r62868

mkdir temp
cd temp
svnadmin create repo
svn co file://`pwd`/repo wc
export REPO=file://`pwd`/repo
cd wc
mkdir branches trunk tags
svn add *
svn ci -m 'btt'

echo a > trunk/a
svn add trunk/a
svn ci -m 'Add file.'
svn up

svn cp trunk branches/badname
svn ci -m 'Branch to be renamed.'
svn up

svn cp trunk branches/feature
svn ci -m 'Branch to be unnamed.'
svn up

cd ../..
svnadmin dump temp/repo > branchmap.svndump
echo
echo 'Complete.'
echo 'You probably want to clean up temp now.'
echo 'Dump in branchmap.svndump'
exit 0