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
#
# Generate movetotrunk.svndump
#

mkdir temp
cd temp

mkdir project-orig
cd project-orig
cd ..

svnadmin create testrepo
svnurl=file://`pwd`/testrepo
svn mkdir --parents $svnurl/sub1/sub2 -m subpaths
svn import project-orig $svnurl/sub1/sub2 -m "init project"

svn co $svnurl/sub1/sub2 project
cd project
echo a > a
svn add a
mkdir dir
echo b > dir/b
svn add dir
svn ci -m adda
svn up
mkdir trunk
svn add trunk
svn mv a trunk/a
svn mv dir trunk/dir
svn ci -m 'move to trunk'
cd ..

svnadmin dump testrepo > ../movetotrunk.svndump