tests/test-journal-exists.t

convert: added bookmarks support in filemap

When using the convert extension from a Mercurial rep. to subset it with
filemap, the bookmarks are not copied. I fixed this by calling the
base.get_bookmarks() from the filemap getbookmarks() instead of returning an
empty dictionary. It should work also for other converters that implement
getbookmarks() (like git). I don't see any drawbacks except that the bookmarks
are always copied (not necessarily wanted all the times).

  $ hg init
  $ echo a > a
  $ hg ci -Am0
  adding a

  $ hg -q clone . foo

  $ touch .hg/store/journal

  $ echo foo > a
  $ hg ci -Am0
  abort: abandoned transaction found - run hg recover!
  [255]

  $ hg recover
  rolling back interrupted transaction
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  1 files, 1 changesets, 1 total revisions

Check that zero-size journals are correctly aborted:

  $ hg bundle -qa repo.hg
  $ chmod -w foo/.hg/store/00changelog.i

  $ hg -R foo unbundle repo.hg
  adding changesets
  abort: Permission denied: $TESTTMP/foo/.hg/store/.00changelog.i-* (glob)
  [255]

  $ if test -f foo/.hg/store/journal; then echo 'journal exists :-('; fi