convert/svn: make sink recover gracefully from empty changeset
Otherwise when processing a changeset that in fact changes no files
(perhaps due to bug in import from CVS) can get something like:
unexpected svn output:
abort: unable to cope with svn output
Bug report and patch draft by Jesse Glick <jesse.glick@sun.com>
#!/bin/sh
hg init repo
cd repo
i=0; while [ "$i" -lt 213 ]; do echo a >> a; i=`expr $i + 1`; done
hg add a
echo '% wide diffstat'
hg diff --stat
echo '% diffstat width'
COLUMNS=24 hg diff --config ui.interactive=true --stat
hg ci -m adda
cat >> a <<EOF
a
a
a
EOF
echo '% narrow diffstat'
hg diff --stat
hg ci -m appenda
printf '\0' > b
hg add b
echo '% binary diffstat'
hg diff --stat
echo '% binary git diffstat'
hg diff --stat --git