tests/test-http-branchmap.t

changegroup: cg3 has two empty groups *after* manifests

changegroup.getchunks() determines the end of the stream by looking
for an empty chunk group (two consecutive empty chunks). It ignores
empty groups in the first two groups. Changegroup 3 introduced an
empty chunk between the manifests and the files, which confuses
getchunks(). Since it comes after the first two, getchunks() will stop
there.

Fix by rewriting getchunks so it first counts two groups (empty or
not) and then keeps antostarts counting empty groups. With this counting,
changegroup 1 and 2 have exactly one empty group after the first two
groups, while changegroup 3 has two (one for directories and one for
files).

It's a little hard to test this at this point, but I have verified
that this patch fixes narrowhg (which was broken before this
patch). Also, future patches will fix "hg strip" with treemanifests,
and once that's done, getchunks() will be tested through tests of "hg
strip".

#require killdaemons

  $ hgserve() {
  >     hg serve -a localhost -p $HGPORT1 -d --pid-file=hg.pid \
  >       -E errors.log -v $@ > startup.log
  >     # Grepping hg serve stdout would hang on Windows
  >     grep -v 'listening at' startup.log
  >     cat hg.pid >> "$DAEMON_PIDS"
  > }
  $ hg init a
  $ hg --encoding utf-8 -R a branch æ
  marked working directory as branch \xc3\xa6 (esc)
  (branches are permanent and global, did you want a bookmark?)
  $ echo foo > a/foo
  $ hg -R a ci -Am foo
  adding foo
  $ hgserve -R a --config web.push_ssl=False --config web.allow_push=* --encoding latin1
  $ hg --encoding utf-8 clone http://localhost:$HGPORT1 b
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  updating to branch \xc3\xa6 (esc)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg --encoding utf-8 -R b log
  changeset:   0:867c11ce77b8
  branch:      \xc3\xa6 (esc)
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     foo
  
  $ echo bar >> b/foo
  $ hg -R b ci -m bar
  $ hg --encoding utf-8 -R b push
  pushing to http://localhost:$HGPORT1/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  $ hg -R a --encoding utf-8 log
  changeset:   1:58e7c90d67cb
  branch:      \xc3\xa6 (esc)
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     bar
  
  changeset:   0:867c11ce77b8
  branch:      \xc3\xa6 (esc)
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     foo
  
  $ killdaemons.py hg.pid

verify 7e7d56fe4833 (encoding fallback in branchmap to maintain compatibility with 1.3.x)

  $ cat <<EOF > oldhg
  > import sys
  > from mercurial import ui, hg, commands
  > 
  > class StdoutWrapper(object):
  >     def __init__(self, stdout):
  >         self._file = stdout
  > 
  >     def write(self, data):
  >         if data == '47\n':
  >             # latin1 encoding is one %xx (3 bytes) shorter
  >             data = '44\n'
  >         elif data.startswith('%C3%A6 '):
  >             # translate to latin1 encoding
  >             data = '%%E6 %s' % data[7:]
  >         self._file.write(data)
  > 
  >     def __getattr__(self, name):
  >         return getattr(self._file, name)
  > 
  > sys.stdout = StdoutWrapper(sys.stdout)
  > sys.stderr = StdoutWrapper(sys.stderr)
  > 
  > myui = ui.ui()
  > repo = hg.repository(myui, 'a')
  > commands.serve(myui, repo, stdio=True, cmdserver=False)
  > EOF
  $ echo baz >> b/foo
  $ hg -R b ci -m baz
  $ hg push -R b -e 'python oldhg' ssh://dummy/ --encoding latin1
  pushing to ssh://dummy/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files