comparison tests/test-mq @ 9151:f528d1a93491

tags: implement persistent tag caching (issue548).

- rename findglobaltags() to findglobaltags1() (so the "no cache"
  implementation is still there if we need it)
- add findglobaltags2() and make findglobaltags() an alias for it
  (disabling tag caching is a one-line patch)
- factor out tagcache class with methods readcache() and writecache();
  the expensive part of tag finding (iterate over heads and find
  .hgtags filenode) is now in tagcache.readcache()

9150:09a1ee498756

echo % qpop

hg qpop
checkundo qpop

echo % qpush

hg qpush
checkundo qpush

cd ..

echo % pop/push outside repo

9151:f528d1a93491

echo % qpop

hg qpop
checkundo qpop

echo % qpush with dump of tag cache

# Dump the tag cache to ensure that it has exactly one head after qpush.
rm -f .hg/tags.cache
hg tags > /dev/null
echo ".hg/tags.cache (pre qpush):"
sed 's/ [0-9a-f]*//' .hg/tags.cache
hg qpush
hg tags > /dev/null
echo ".hg/tags.cache (post qpush):"
sed 's/ [0-9a-f]*//' .hg/tags.cache

checkundo qpush

cd ..

echo % pop/push outside repo