test-convert-darcs: don't let $HOME/.darcs pollute the test environment

tests/test-convert-darcs

@@ -1,52 +1,53
 #!/bin/sh
 
 "$TESTDIR/hghave" darcs || exit 80
 
 echo "[extensions]" >> $HGRCPATH
 echo "convert=" >> $HGRCPATH
 echo 'hgext.graphlog =' >> $HGRCPATH
 
 DARCS_EMAIL='[e-mail]'; export DARCS_EMAIL
+HOME=do_not_use_HOME_darcs; export HOME
 
 echo % initialize darcs repo
 mkdir darcs-repo
 cd darcs-repo
 darcs init
 echo a > a
 darcs record -a -l -m p0
 cd ..
 
 echo % branch and update
 darcs get darcs-repo darcs-clone
 cd darcs-clone
 echo c >> a
 echo c > c
 darcs record -a -l -m p1.1
 cd ..
 
 echo % update source
 cd darcs-repo
 echo b >> a
 echo b > b
 darcs record -a -l -m p1.2
 
 echo % merge branch
 darcs pull -a ../darcs-clone
 echo e > a
 darcs record -a -l -m p2
 cd ..
 
 glog()
 {
     hg glog --template '#rev# "#desc|firstline#" files: #files#\n' "$@"
 }
 
 hg convert darcs-repo darcs-repo-hg
 # The converter does not currently handle patch conflicts very well.
 # When they occur, it reverts *all* changes and moves forward,
 # letting the conflict resolving patch fix collisions.
 # Unfortunately, non-conflicting changes, like the addition of the
 # "c" file in p1.1 patch are reverted too.
 # Just to say that manifest not listing "c" here is a bug.
 glog -R darcs-repo-hg
 hg -R darcs-repo-hg manifest --debug