layouts: fix crash when importing hgsubversion itself (issue #402) Mercurial extensions are a bit weird: they aren't normally in sys.path, so you can't assume that "import hgsubversion" works. Luckily, Mercurial sneaks a little treat into sys.modules so that "import hgext_hgsubversion" does work. In fact, to get things working *as a Mercurial extension*, all that's needed is that trivial change to two import lines, in layouts/detect.py and layouts/standard.py. Unfortunately, hgsubversion is also imported as a Python module, in its own test suite. In that context, there is no "hgext_" trick -- unless we do it in ourselves, which I've done in TestBase.setUp(). That would work fine ... except that test_util imports from hgsubversion, which ends up importing hgsubversion.layouts.{detect,standard}, which want the "hgext_" trick to work. But it hasn't been done yet when we're still importing; it doesn't happen until setUp() runs. So make those two imports happen late, in the functions that need them. Incidentally, this is only necessary to support Mercurial <= 2.7. Mercurial got a bit smarter in 2.8: http://selenic.com/repo/hg/rev/621a26eb3a99

#!/bin/sh
#
# Generate filecase.svndump
# WARNING: this script must be run on a case-sensitive file system
#

mkdir temp
cd temp

mkdir project-orig
cd project-orig
mkdir trunk
cd ..

svnadmin create testrepo
svnurl=file://`pwd`/testrepo
svn import project-orig $svnurl -m "init project"

svn co $svnurl project
cd project/trunk
# Test files and directories differing in case only
echo a > a
echo A > A
echo b > b
mkdir d
echo a > d/a
mkdir D
echo a > D/a
mkdir e
echo a > e/a
mkdir f
echo a > f/a
echo F > F
svn add a A b d D e f F
svn ci -m 'add files'
# Rename files and directories, changing only their case
svn mv b B
svn mv d/a d/A
svn mv e E
svn ci -m 'change case'
cd ../..

svnadmin dump testrepo > ../filecase.svndump