Store empty (default) branch in branch cache, too.
Operations on this branch don't work otherwise.
Reading branches.cache had to be adjusted to allow an empty label.
Adjusted reading of the cache tip for symmetry, no functional change here.
#!/bin/sh
hg init
touch a.o
touch a.c
touch syntax
mkdir dir
touch dir/a.o
touch dir/b.o
touch dir/c.o
hg add dir/a.o
hg commit -m 0
hg add dir/b.o
echo "--" ; hg status
echo "*.o" > .hgignore
echo "--" ; hg status 2>&1 | sed -e 's/abort: .*\.hgignore:/abort: .hgignore:/'
echo ".*\.o" > .hgignore
echo "--" ; hg status
# XXX: broken
#echo "glob:**.o" > .hgignore
#echo "--" ; hg status
#
#echo "glob:*.o" > .hgignore
#echo "--" ; hg status
echo "syntax: invalid" > .hgignore
echo "--" ; hg status 2>&1 | sed -e 's/.*\.hgignore:/.hgignore:/'
echo "syntax: glob" > .hgignore
echo "*.o" >> .hgignore
echo "--" ; hg status
echo "relglob:syntax*" > .hgignore
echo "--" ; hg status
echo "relglob:*" > .hgignore
echo "--" ; hg status
cd dir
echo "--" ; hg status .