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

#!/usr/bin/env bash

set -e

mkdir temp
cd temp

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

cd client
mkdir trunk
mkdir -p branches
mkdir -p tags

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

mkdir trunk/project trunk/other
echo "project trunk" > trunk/project/file
echo "other trunk" > trunk/other/phile
svn add trunk/project trunk/other
svn commit -m "Added file and phile in trunk"

svn up

svn cp trunk tags/tag_from_trunk
svn ci -m 'created tag from trunk'

svn up

svn cp trunk branches/branch
svn ci -m 'created branch from trunk'

svn up

echo "project branch" > branches/branch/project/file
svn ci -m "committed to the project branch"

svn up

echo "trunk2" > trunk/project/file
svn ci -m "committed to trunk again"

svn up

echo "other branch" > branches/branch/other/phile
svn ci -m "committed to the other branch"

svn up

svn cp branches/branch tags/tag_from_branch
svn ci -m "create tag from branch"

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

echo "Created subprojects.svndump"
echo "You might want to clean up ${PWD} now"