util._matcher: speed up regexp matching.
In 4babaa52badf, Benoit made a change that substantially slows matching
when a big .hgignore file is in play, because it calls into the regexp
matching engine potentially hundreds of times per file to be matched.
I've partly rolled back his change, so that we only call into the matcher
once per file, but preserved the ability to report a meaningful error
message if there's a syntax error in the regexp.
#!/bin/sh
hg init
echo "# revision 0"
echo "unchanged" > unchanged
echo "remove me" > remove
echo "copy me" > copy
echo "move me" > move
for i in 1 2 3 4 5 6 7 8 9; do
echo "merge ok $i" >> zzz1_merge_ok
done
echo "merge bad" > zzz2_merge_bad
hg ci -Am "revision 0" -d "1000000 0"
echo "# revision 1"
hg rm remove
hg mv move moved
hg cp copy copied
echo "added" > added
hg add added
echo "new first line" > zzz1_merge_ok
hg cat zzz1_merge_ok >> zzz1_merge_ok
echo "new last line" >> zzz2_merge_bad
hg ci -m "revision 1" -d "1000000 0"
echo "# local changes to revision 0"
hg co 0
echo "new last line" >> zzz1_merge_ok
echo "another last line" >> zzz2_merge_bad
hg diff --nodates | grep "^[+-][^<>]"
hg st
echo "# local merge with bad merge tool"
HGMERGE=false hg co
hg co 0
hg diff --nodates | grep "^[+-][^<>]"
hg st
echo "# local merge with conflicts"
hg co
hg co 0
hg diff --nodates | grep "^[+-][^<>]"
hg st
echo "# local merge without conflicts"
hg revert zzz2_merge_bad
hg co
hg diff --nodates | grep "^[+-][^<>]"
hg st