annotate tests/test-bundle2-remote-changegroup.t @ 44363:f7459da77f23

nodemap: introduce an option to use mmap to read the nodemap mapping

The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.

This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).

Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:

Before:

 * do not use the persistent nodemap
 * use the CPython implementation of the index for nodemap
 * use mmapping of the changelog index

After:

 * use the MixedIndex Rust code, with the NodeTree object for nodemap access
   (still in review)
 * use the persistent nodemap data from disk
 * access the persistent nodemap data through mmap
 * use mmapping of the changelog index

The persistent nodemap greatly speed up  most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.

Here are some numbers (in seconds) for the reference copy of mozilla-try:

Revset            Before   After     abs-change speedup

-10000:           0.004622 0.005532   0.000910  ×   0.83
-10:              0.000050 0.000132   0.000082  ×   0.37
tip               0.000052 0.000085   0.000033  ×   0.61
0 + (-10000:)     0.028222 0.005337  -0.022885  ×   5.29
0                 0.023521 0.000084  -0.023437  × 280.01
(-10000:) + 0     0.235539 0.005308  -0.230231  ×  44.37
(-10:) + :9       0.232883 0.000180  -0.232703  ×1293.79
(-10000:) + (:99) 0.238735 0.005358  -0.233377  ×  44.55
:99 + (-10000:)   0.317942 0.005593  -0.312349  ×  56.84
:9 + (-10:)       0.313372 0.000179  -0.313193  ×1750.68
:9                0.316450 0.000143  -0.316307  ×2212.93


On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.

Here are some numbers (in seconds) for the reference copy of mercurial:

Revset            Before   After     abs-change speedup
-10:              0.000065 0.000097   0.000032  × 0.67
tip               0.000063 0.000078   0.000015  × 0.80
0                 0.000561 0.000079  -0.000482  × 7.10
-10000:           0.004609 0.003648  -0.000961  × 1.26
0 + (-10000:)     0.005023 0.003715  -0.001307  × 1.35
(-10:) + :9       0.002187 0.000108  -0.002079  ×20.25
(-10000:) + 0     0.006252 0.003716  -0.002536  × 1.68
(-10000:) + (:99) 0.006367 0.003707  -0.002660  × 1.71
:9 + (-10:)       0.003846 0.000110  -0.003736  ×34.96
:9                0.003854 0.000099  -0.003755  ×38.92
:99 + (-10000:)   0.007644 0.003778  -0.003866  × 2.02

Differential Revision: https://phab.mercurial-scm.org/D7894

#testcases sshv1 sshv2

#if sshv2
  $ cat >> $HGRCPATH << EOF
  > [experimental]
  > sshpeer.advertise-v2 = true
  > sshserver.support-v2 = true
  > EOF
#endif

Create an extension to test bundle2 remote-changegroup parts

  $ cat > bundle2.py << EOF
  > """A small extension to test bundle2 remote-changegroup parts.
  > 
  > Current bundle2 implementation doesn't provide a way to generate those
  > parts, so they must be created by extensions.
  > """
  > from mercurial import (
  >     bundle2,
  >     changegroup,
  >     discovery,
  >     exchange,
  >     pycompat,
  >     util,
  > )
  > 
  > def _getbundlechangegrouppart(bundler, repo, source, bundlecaps=None,
  >                               b2caps=None, heads=None, common=None,
  >                               **kwargs):
  >     """this function replaces the changegroup part handler for getbundle.
  >     It allows to create a set of arbitrary parts containing changegroups
  >     and remote-changegroups, as described in a bundle2maker file in the
  >     repository .hg/ directory.
  > 
  >     Each line of that bundle2maker file contain a description of the
  >     part to add:
  >       - changegroup common_revset heads_revset
  >           Creates a changegroup part based, using common_revset and
  >           heads_revset for outgoing
  >       - remote-changegroup url file
  >           Creates a remote-changegroup part for a bundle at the given
  >           url. Size and digest, as required by the client, are computed
  >           from the given file.
  >       - raw-remote-changegroup <python expression>
  >           Creates a remote-changegroup part with the data given in the
  >           Python expression as parameters. The Python expression is
  >           evaluated with eval, and is expected to be a dict.
  >     """
  >     def newpart(name, data=b''):
  >         """wrapper around bundler.newpart adding an extra part making the
  >         client output information about each processed part"""
  >         bundler.newpart(b'output', data=name)
  >         part = bundler.newpart(name, data=data)
  >         return part
  > 
  >     for line in open(repo.vfs.join(b'bundle2maker'), 'rb'):
  >         line = line.strip()
  >         try:
  >             verb, args = line.split(None, 1)
  >         except ValueError:
  >             verb, args = line, b''
  >         if verb == b'remote-changegroup':
  >            url, file = args.split()
  >            bundledata = open(file, 'rb').read()
  >            digest = util.digester.preferred(b2caps[b'digests'])
  >            d = util.digester([digest], bundledata)
  >            part = newpart(b'remote-changegroup')
  >            part.addparam(b'url', url)
  >            part.addparam(b'size', b'%d' % len(bundledata))
  >            part.addparam(b'digests', digest)
  >            part.addparam(b'digest:%s' % digest, d[digest])
  >         elif verb == b'raw-remote-changegroup':
  >            part = newpart(b'remote-changegroup')
  >            for k, v in eval(args).items():
  >                part.addparam(pycompat.sysbytes(k), pycompat.bytestr(v))
  >         elif verb == b'changegroup':
  >             _common, heads = args.split()
  >             common.extend(repo[r].node() for r in repo.revs(_common))
  >             heads = [repo[r].node() for r in repo.revs(heads)]
  >             outgoing = discovery.outgoing(repo, common, heads)
  >             cg = changegroup.makechangegroup(repo, outgoing, b'01',
  >                                              b'changegroup')
  >             newpart(b'changegroup', cg.getchunks())
  >         else:
  >             raise Exception('unknown verb')
  > 
  > exchange.getbundle2partsmapping[b'changegroup'] = _getbundlechangegrouppart
  > EOF

Start a simple HTTP server to serve bundles

  $ "$PYTHON" "$TESTDIR/dumbhttp.py" -p $HGPORT --pid dumb.pid
  $ cat dumb.pid >> $DAEMON_PIDS

  $ cat >> $HGRCPATH << EOF
  > [ui]
  > ssh="$PYTHON" "$TESTDIR/dummyssh"
  > logtemplate={rev}:{node|short} {phase} {author} {bookmarks} {desc|firstline}
  > EOF

  $ hg init repo

  $ hg -R repo unbundle $TESTDIR/bundles/rebase.hg
  adding changesets
  adding manifests
  adding file changes
  added 8 changesets with 7 changes to 7 files (+2 heads)
  new changesets cd010b8cd998:02de42196ebe (8 drafts)
  (run 'hg heads' to see heads, 'hg merge' to merge)

  $ hg -R repo log -G
  o  7:02de42196ebe draft Nicolas Dumazet <[e-mail]>  H
  |
  | o  6:eea13746799a draft Nicolas Dumazet <[e-mail]>  G
  |/|
  o |  5:24b6387c8c8c draft Nicolas Dumazet <[e-mail]>  F
  | |
  | o  4:9520eea781bc draft Nicolas Dumazet <[e-mail]>  E
  |/
  | o  3:32af7686d403 draft Nicolas Dumazet <[e-mail]>  D
  | |
  | o  2:5fddd98957c8 draft Nicolas Dumazet <[e-mail]>  C
  | |
  | o  1:42ccdea3bb16 draft Nicolas Dumazet <[e-mail]>  B
  |/
  o  0:cd010b8cd998 draft Nicolas Dumazet <[e-mail]>  A
  
  $ hg clone repo orig
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cat > repo/.hg/hgrc << EOF
  > [extensions]
  > bundle2=$TESTTMP/bundle2.py
  > EOF

Test a pull with an remote-changegroup

  $ hg bundle -R repo --type v1 --base '0:4' -r '5:7' bundle.hg
  3 changesets found
  $ cat > repo/.hg/bundle2maker << EOF
  > remote-changegroup http://localhost:$HGPORT/bundle.hg bundle.hg
  > EOF
  $ hg clone orig clone -r 3 -r 4
  adding changesets
  adding manifests
  adding file changes
  added 5 changesets with 5 changes to 5 files (+1 heads)
  new changesets cd010b8cd998:9520eea781bc
  updating to branch default
  4 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 2 changes to 2 files (+1 heads)
  new changesets 24b6387c8c8c:02de42196ebe
  (run 'hg heads .' to see heads, 'hg merge' to merge)
  $ hg -R clone log -G
  o  7:02de42196ebe public Nicolas Dumazet <[e-mail]>  H
  |
  | o  6:eea13746799a public Nicolas Dumazet <[e-mail]>  G
  |/|
  o |  5:24b6387c8c8c public Nicolas Dumazet <[e-mail]>  F
  | |
  | o  4:9520eea781bc public Nicolas Dumazet <[e-mail]>  E
  |/
  | @  3:32af7686d403 public Nicolas Dumazet <[e-mail]>  D
  | |
  | o  2:5fddd98957c8 public Nicolas Dumazet <[e-mail]>  C
  | |
  | o  1:42ccdea3bb16 public Nicolas Dumazet <[e-mail]>  B
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ rm -rf clone

Test a pull with an remote-changegroup and a following changegroup

  $ hg bundle -R repo --type v1 --base 2 -r '3:4' bundle2.hg
  2 changesets found
  $ cat > repo/.hg/bundle2maker << EOF
  > remote-changegroup http://localhost:$HGPORT/bundle2.hg bundle2.hg
  > changegroup 0:4 5:7
  > EOF
  $ hg clone orig clone -r 2
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files
  new changesets cd010b8cd998:5fddd98957c8
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  remote: changegroup
  adding changesets
  adding manifests
  adding file changes
  added 5 changesets with 4 changes to 4 files (+2 heads)
  new changesets 32af7686d403:02de42196ebe
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg -R clone log -G
  o  7:02de42196ebe public Nicolas Dumazet <[e-mail]>  H
  |
  | o  6:eea13746799a public Nicolas Dumazet <[e-mail]>  G
  |/|
  o |  5:24b6387c8c8c public Nicolas Dumazet <[e-mail]>  F
  | |
  | o  4:9520eea781bc public Nicolas Dumazet <[e-mail]>  E
  |/
  | o  3:32af7686d403 public Nicolas Dumazet <[e-mail]>  D
  | |
  | @  2:5fddd98957c8 public Nicolas Dumazet <[e-mail]>  C
  | |
  | o  1:42ccdea3bb16 public Nicolas Dumazet <[e-mail]>  B
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ rm -rf clone

Test a pull with a changegroup followed by an remote-changegroup

  $ hg bundle -R repo --type v1 --base '0:4' -r '5:7' bundle3.hg
  3 changesets found
  $ cat > repo/.hg/bundle2maker << EOF
  > changegroup 000000000000 :4
  > remote-changegroup http://localhost:$HGPORT/bundle3.hg bundle3.hg
  > EOF
  $ hg clone orig clone -r 2
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files
  new changesets cd010b8cd998:5fddd98957c8
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: changegroup
  adding changesets
  adding manifests
  adding file changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  added 5 changesets with 4 changes to 4 files (+2 heads)
  new changesets 32af7686d403:02de42196ebe
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg -R clone log -G
  o  7:02de42196ebe public Nicolas Dumazet <[e-mail]>  H
  |
  | o  6:eea13746799a public Nicolas Dumazet <[e-mail]>  G
  |/|
  o |  5:24b6387c8c8c public Nicolas Dumazet <[e-mail]>  F
  | |
  | o  4:9520eea781bc public Nicolas Dumazet <[e-mail]>  E
  |/
  | o  3:32af7686d403 public Nicolas Dumazet <[e-mail]>  D
  | |
  | @  2:5fddd98957c8 public Nicolas Dumazet <[e-mail]>  C
  | |
  | o  1:42ccdea3bb16 public Nicolas Dumazet <[e-mail]>  B
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ rm -rf clone

Test a pull with two remote-changegroups and a changegroup

  $ hg bundle -R repo --type v1 --base 2 -r '3:4' bundle4.hg
  2 changesets found
  $ hg bundle -R repo --type v1 --base '3:4' -r '5:6' bundle5.hg
  2 changesets found
  $ cat > repo/.hg/bundle2maker << EOF
  > remote-changegroup http://localhost:$HGPORT/bundle4.hg bundle4.hg
  > remote-changegroup http://localhost:$HGPORT/bundle5.hg bundle5.hg
  > changegroup 0:6 7
  > EOF
  $ hg clone orig clone -r 2
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files
  new changesets cd010b8cd998:5fddd98957c8
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  remote: changegroup
  adding changesets
  adding manifests
  adding file changes
  added 5 changesets with 4 changes to 4 files (+2 heads)
  new changesets 32af7686d403:02de42196ebe
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg -R clone log -G
  o  7:02de42196ebe public Nicolas Dumazet <[e-mail]>  H
  |
  | o  6:eea13746799a public Nicolas Dumazet <[e-mail]>  G
  |/|
  o |  5:24b6387c8c8c public Nicolas Dumazet <[e-mail]>  F
  | |
  | o  4:9520eea781bc public Nicolas Dumazet <[e-mail]>  E
  |/
  | o  3:32af7686d403 public Nicolas Dumazet <[e-mail]>  D
  | |
  | @  2:5fddd98957c8 public Nicolas Dumazet <[e-mail]>  C
  | |
  | o  1:42ccdea3bb16 public Nicolas Dumazet <[e-mail]>  B
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ rm -rf clone

Hash digest tests

  $ hg bundle -R repo --type v1 -a bundle6.hg
  8 changesets found

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle6.hg', 'size': 1663, 'digests': 'sha1', 'digest:sha1': '2c880cfec23cff7d8f80c2f12958d1563cbdaba6'}
  > EOF
  $ hg clone ssh://user@dummy/repo clone
  requesting all changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  added 8 changesets with 7 changes to 7 files (+2 heads)
  new changesets cd010b8cd998:02de42196ebe
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf clone

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle6.hg', 'size': 1663, 'digests': 'md5', 'digest:md5': 'e22172c2907ef88794b7bea6642c2394'}
  > EOF
  $ hg clone ssh://user@dummy/repo clone
  requesting all changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  added 8 changesets with 7 changes to 7 files (+2 heads)
  new changesets cd010b8cd998:02de42196ebe
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf clone

Hash digest mismatch throws an error

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle6.hg', 'size': 1663, 'digests': 'sha1', 'digest:sha1': '0' * 40}
  > EOF
  $ hg clone ssh://user@dummy/repo clone
  requesting all changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  transaction abort!
  rollback completed
  abort: bundle at http://localhost:$HGPORT/bundle6.hg is corrupted:
  sha1 mismatch: expected 0000000000000000000000000000000000000000, got 2c880cfec23cff7d8f80c2f12958d1563cbdaba6
  [255]

Multiple hash digests can be given

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle6.hg', 'size': 1663, 'digests': 'md5 sha1', 'digest:md5': 'e22172c2907ef88794b7bea6642c2394', 'digest:sha1': '2c880cfec23cff7d8f80c2f12958d1563cbdaba6'}
  > EOF
  $ hg clone ssh://user@dummy/repo clone
  requesting all changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  added 8 changesets with 7 changes to 7 files (+2 heads)
  new changesets cd010b8cd998:02de42196ebe
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf clone

If either of the multiple hash digests mismatches, an error is thrown

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle6.hg', 'size': 1663, 'digests': 'md5 sha1', 'digest:md5': '0' * 32, 'digest:sha1': '2c880cfec23cff7d8f80c2f12958d1563cbdaba6'}
  > EOF
  $ hg clone ssh://user@dummy/repo clone
  requesting all changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  transaction abort!
  rollback completed
  abort: bundle at http://localhost:$HGPORT/bundle6.hg is corrupted:
  md5 mismatch: expected 00000000000000000000000000000000, got e22172c2907ef88794b7bea6642c2394
  [255]

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle6.hg', 'size': 1663, 'digests': 'md5 sha1', 'digest:md5': 'e22172c2907ef88794b7bea6642c2394', 'digest:sha1': '0' * 40}
  > EOF
  $ hg clone ssh://user@dummy/repo clone
  requesting all changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  transaction abort!
  rollback completed
  abort: bundle at http://localhost:$HGPORT/bundle6.hg is corrupted:
  sha1 mismatch: expected 0000000000000000000000000000000000000000, got 2c880cfec23cff7d8f80c2f12958d1563cbdaba6
  [255]

Corruption tests

  $ hg clone orig clone -r 2
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 3 files
  new changesets cd010b8cd998:5fddd98957c8
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cat > repo/.hg/bundle2maker << EOF
  > remote-changegroup http://localhost:$HGPORT/bundle4.hg bundle4.hg
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle5.hg', 'size': 578, 'digests': 'sha1', 'digest:sha1': '0' * 40}
  > changegroup 0:6 7
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  transaction abort!
  rollback completed
  abort: bundle at http://localhost:$HGPORT/bundle5.hg is corrupted:
  sha1 mismatch: expected 0000000000000000000000000000000000000000, got f29485d6bfd37db99983cfc95ecb52f8ca396106
  [255]

The entire transaction has been rolled back in the pull above

  $ hg -R clone log -G
  @  2:5fddd98957c8 public Nicolas Dumazet <[e-mail]>  C
  |
  o  1:42ccdea3bb16 public Nicolas Dumazet <[e-mail]>  B
  |
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  

No params

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {}
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  abort: remote-changegroup: missing "url" param
  [255]

Missing size

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle4.hg'}
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  abort: remote-changegroup: missing "size" param
  [255]

Invalid size

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle4.hg', 'size': 'foo'}
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  abort: remote-changegroup: invalid value for param "size"
  [255]

Size mismatch

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle4.hg', 'size': 42}
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  adding changesets
  adding manifests
  adding file changes
  transaction abort!
  rollback completed
  abort: bundle at http://localhost:$HGPORT/bundle4.hg is corrupted:
  size mismatch: expected 42, got 581
  [255]

Unknown digest

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle4.hg', 'size': 581, 'digests': 'foo', 'digest:foo': 'bar'}
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  abort: missing support for remote-changegroup - digest:foo
  [255]

Missing digest

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'http://localhost:$HGPORT/bundle4.hg', 'size': 581, 'digests': 'sha1'}
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  abort: remote-changegroup: missing "digest:sha1" param
  [255]

Not an HTTP url

  $ cat > repo/.hg/bundle2maker << EOF
  > raw-remote-changegroup {'url': 'ssh://localhost:$HGPORT/bundle4.hg', 'size': 581}
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  abort: remote-changegroup does not support ssh urls
  [255]

Not a bundle

  $ cat > notbundle.hg << EOF
  > foo
  > EOF
  $ cat > repo/.hg/bundle2maker << EOF
  > remote-changegroup http://localhost:$HGPORT/notbundle.hg notbundle.hg
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  abort: http://localhost:$HGPORT/notbundle.hg: not a Mercurial bundle
  [255]

Not a bundle 1.0

  $ cat > notbundle10.hg << EOF
  > HG20
  > EOF
  $ cat > repo/.hg/bundle2maker << EOF
  > remote-changegroup http://localhost:$HGPORT/notbundle10.hg notbundle10.hg
  > EOF
  $ hg pull -R clone ssh://user@dummy/repo
  pulling from ssh://user@dummy/repo
  searching for changes
  remote: remote-changegroup
  abort: http://localhost:$HGPORT/notbundle10.hg: not a bundle version 1.0
  [255]

  $ hg -R clone log -G
  @  2:5fddd98957c8 public Nicolas Dumazet <[e-mail]>  C
  |
  o  1:42ccdea3bb16 public Nicolas Dumazet <[e-mail]>  B
  |
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ rm -rf clone

  $ killdaemons.py