util: add visitor pattern for scrubbing json These functions are for future patches that will add safer serialization via json. '_convert' is a visitor pattern that will be used for lists, dictionaries, and strings for helping convert None to the empty string since json forbids 'null' as a key for a dictionary. None -> '' is a safe mapping because this is for the 'branch_info' variable which already maps the empty string to None. Note, also, that json is chosen instead of, say, csv because json has a concept of 'null' and will better handle utf8 strings (which subversion supports). Important: this changes the requirement of hgsubversion to python 2.6+.

#!/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