view tests/test-bundle2-exchange.t @ 23167:a3c2d9211294 stable

templater: don't overwrite the keyword mapping in runsymbol() (issue4362)

This keyword remapping was introduced in e06e9fd2d99f as part of converting
generator based iterators into list based iterators, mentioning "undesired
behavior in template" when a generator is exhausted, but doesn't say what and
introduces no tests.

The problem with the remapping was that it corrupted the output for keywords
like 'extras', 'file_copies' and 'file_copies_switch' in templates such as:

    $ hg log -r 142b5d5ec9cc --template "{file_copies % ' File: {file_copy}\n'}"
    File: mercurial/changelog.py (mercurial/hg.py)
    File: mercurial/changelog.py (mercurial/hg.py)
    File: mercurial/changelog.py (mercurial/hg.py)
    File: mercurial/changelog.py (mercurial/hg.py)
    File: mercurial/changelog.py (mercurial/hg.py)
    File: mercurial/changelog.py (mercurial/hg.py)
    File: mercurial/changelog.py (mercurial/hg.py)
    File: mercurial/changelog.py (mercurial/hg.py)

What was happening was that in the first call to runtemplate() inside runmap(),
'lm' mapped the keyword (e.g. file_copies) to the appropriate showxxx() method.
On each subsequent call to runtemplate() in that loop however, the keyword was
mapped to a list of the first item's pieces, e.g.:

   'file_copy': ['mercurial/changelog.py', ' (', 'mercurial/hg.py', ')']

Therefore, the dict for the second and any subsequent items were not processed
through the corresponding showxxx() method, and the first item's data was
reused.

The 'extras' keyword regressed in de7e6c489412, and 'file_copies' regressed in
0b241d7a8c62 for other reasons.  The common thread of things fixed by this seems
to be when a list of dicts are passed to the templatekw._hybrid class.

Test exchange of common information using bundle2


  $ getmainid() {
  >    hg -R main log --template '{node}\n' --rev "$1"
  > }

enable obsolescence

  $ cat >> $HGRCPATH << EOF
  > [experimental]
  > evolution=createmarkers,exchange
  > bundle2-exp=True
  > [ui]
  > ssh=python "$TESTDIR/dummyssh"
  > logtemplate={rev}:{node|short} {phase} {author} {bookmarks} {desc|firstline}
  > [web]
  > push_ssl = false
  > allow_push = *
  > [phases]
  > publish=False
  > [hooks]
  > changegroup = sh -c  "HG_LOCAL= python \"$TESTDIR/printenv.py\" changegroup"
  > b2x-transactionclose = sh -c  "HG_LOCAL= python \"$TESTDIR/printenv.py\" b2x-transactionclose"
  > EOF

The extension requires a repo (currently unused)

  $ hg init main
  $ cd main
  $ touch a
  $ hg add a
  $ hg commit -m 'a'

  $ hg unbundle $TESTDIR/bundles/rebase.hg
  adding changesets
  adding manifests
  adding file changes
  added 8 changesets with 7 changes to 7 files (+3 heads)
  changegroup hook: HG_NODE=cd010b8cd998f3981a5a8115f94f8da4ab506089 HG_SOURCE=unbundle HG_URL=bundle:*/rebase.hg (glob)
  (run 'hg heads' to see heads, 'hg merge' to merge)

  $ cd ..

Real world exchange
=====================

Add more obsolescence information

  $ hg -R main debugobsolete -d '0 0' 1111111111111111111111111111111111111111 `getmainid 9520eea781bc`
  $ hg -R main debugobsolete -d '0 0' 2222222222222222222222222222222222222222 `getmainid 24b6387c8c8c`

clone --pull

  $ hg -R main phase --public cd010b8cd998
  $ hg clone main other --pull --rev 9520eea781bc
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  1 new obsolescence markers
  changegroup hook: HG_NODE=cd010b8cd998f3981a5a8115f94f8da4ab506089 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
  b2x-transactionclose hook: HG_NEW_OBSMARKERS=1 HG_NODE=cd010b8cd998f3981a5a8115f94f8da4ab506089 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg -R other log -G
  @  1:9520eea781bc draft Nicolas Dumazet <[e-mail]>  E
  |
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ hg -R other debugobsolete
  1111111111111111111111111111111111111111 9520eea781bcca16c1e15acc0ba14335a0e8e5ba 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

pull

  $ hg -R main phase --public 9520eea781bc
  $ hg -R other pull -r 24b6387c8c8c
  pulling from $TESTTMP/main (glob)
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  1 new obsolescence markers
  changegroup hook: HG_NODE=24b6387c8c8cae37178880f3fa95ded3cb1cf785 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
  b2x-transactionclose hook: HG_NEW_OBSMARKERS=1 HG_NODE=24b6387c8c8cae37178880f3fa95ded3cb1cf785 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg -R other log -G
  o  2:24b6387c8c8c draft Nicolas Dumazet <[e-mail]>  F
  |
  | @  1:9520eea781bc draft Nicolas Dumazet <[e-mail]>  E
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ hg -R other debugobsolete
  1111111111111111111111111111111111111111 9520eea781bcca16c1e15acc0ba14335a0e8e5ba 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  2222222222222222222222222222222222222222 24b6387c8c8cae37178880f3fa95ded3cb1cf785 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

pull empty (with phase movement)

  $ hg -R main phase --public 24b6387c8c8c
  $ hg -R other pull -r 24b6387c8c8c
  pulling from $TESTTMP/main (glob)
  no changes found
  b2x-transactionclose hook: HG_NEW_OBSMARKERS=0 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
  $ hg -R other log -G
  o  2:24b6387c8c8c public Nicolas Dumazet <[e-mail]>  F
  |
  | @  1:9520eea781bc draft Nicolas Dumazet <[e-mail]>  E
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ hg -R other debugobsolete
  1111111111111111111111111111111111111111 9520eea781bcca16c1e15acc0ba14335a0e8e5ba 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  2222222222222222222222222222222222222222 24b6387c8c8cae37178880f3fa95ded3cb1cf785 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

pull empty

  $ hg -R other pull -r 24b6387c8c8c
  pulling from $TESTTMP/main (glob)
  no changes found
  b2x-transactionclose hook: HG_NEW_OBSMARKERS=0 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
  $ hg -R other log -G
  o  2:24b6387c8c8c public Nicolas Dumazet <[e-mail]>  F
  |
  | @  1:9520eea781bc draft Nicolas Dumazet <[e-mail]>  E
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ hg -R other debugobsolete
  1111111111111111111111111111111111111111 9520eea781bcca16c1e15acc0ba14335a0e8e5ba 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  2222222222222222222222222222222222222222 24b6387c8c8cae37178880f3fa95ded3cb1cf785 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

add extra data to test their exchange during push

  $ hg -R main bookmark --rev eea13746799a book_eea1
  $ hg -R main debugobsolete -d '0 0' 3333333333333333333333333333333333333333 `getmainid eea13746799a`
  $ hg -R main bookmark --rev 02de42196ebe book_02de
  $ hg -R main debugobsolete -d '0 0' 4444444444444444444444444444444444444444 `getmainid 02de42196ebe`
  $ hg -R main bookmark --rev 42ccdea3bb16 book_42cc
  $ hg -R main debugobsolete -d '0 0' 5555555555555555555555555555555555555555 `getmainid 42ccdea3bb16`
  $ hg -R main bookmark --rev 5fddd98957c8 book_5fdd
  $ hg -R main debugobsolete -d '0 0' 6666666666666666666666666666666666666666 `getmainid 5fddd98957c8`
  $ hg -R main bookmark --rev 32af7686d403 book_32af
  $ hg -R main debugobsolete -d '0 0' 7777777777777777777777777777777777777777 `getmainid 32af7686d403`

  $ hg -R other bookmark --rev cd010b8cd998 book_eea1
  $ hg -R other bookmark --rev cd010b8cd998 book_02de
  $ hg -R other bookmark --rev cd010b8cd998 book_42cc
  $ hg -R other bookmark --rev cd010b8cd998 book_5fdd
  $ hg -R other bookmark --rev cd010b8cd998 book_32af

  $ hg -R main phase --public eea13746799a

push
  $ hg -R main push other --rev eea13746799a --bookmark book_eea1
  pushing to other
  searching for changes
  changegroup hook: HG_BUNDLE2-EXP=1 HG_NODE=eea13746799a9e0bfd88f29d3c2e9dc9389f524f HG_SOURCE=push HG_URL=push
  b2x-transactionclose hook: HG_BOOKMARK_MOVED=1 HG_BUNDLE2-EXP=1 HG_NEW_OBSMARKERS=1 HG_NODE=eea13746799a9e0bfd88f29d3c2e9dc9389f524f HG_PHASES_MOVED=1 HG_SOURCE=push HG_URL=push
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 0 changes to 0 files (-1 heads)
  remote: 1 new obsolescence markers
  updating bookmark book_eea1
  $ hg -R other log -G
  o    3:eea13746799a public Nicolas Dumazet <[e-mail]> book_eea1 G
  |\
  | o  2:24b6387c8c8c public Nicolas Dumazet <[e-mail]>  F
  | |
  @ |  1:9520eea781bc public Nicolas Dumazet <[e-mail]>  E
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]> book_02de book_32af book_42cc book_5fdd A
  
  $ hg -R other debugobsolete
  1111111111111111111111111111111111111111 9520eea781bcca16c1e15acc0ba14335a0e8e5ba 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  2222222222222222222222222222222222222222 24b6387c8c8cae37178880f3fa95ded3cb1cf785 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  3333333333333333333333333333333333333333 eea13746799a9e0bfd88f29d3c2e9dc9389f524f 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

pull over ssh

  $ hg -R other pull ssh://user@dummy/main -r 02de42196ebe --bookmark book_02de
  pulling from ssh://user@dummy/main
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  1 new obsolescence markers
  updating bookmark book_02de
  changegroup hook: HG_NODE=02de42196ebee42ef284b6780a87cdc96e8eaab6 HG_SOURCE=pull HG_URL=ssh://user@dummy/main
  b2x-transactionclose hook: HG_BOOKMARK_MOVED=1 HG_NEW_OBSMARKERS=1 HG_NODE=02de42196ebee42ef284b6780a87cdc96e8eaab6 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=ssh://user@dummy/main
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg -R other debugobsolete
  1111111111111111111111111111111111111111 9520eea781bcca16c1e15acc0ba14335a0e8e5ba 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  2222222222222222222222222222222222222222 24b6387c8c8cae37178880f3fa95ded3cb1cf785 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  3333333333333333333333333333333333333333 eea13746799a9e0bfd88f29d3c2e9dc9389f524f 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  4444444444444444444444444444444444444444 02de42196ebee42ef284b6780a87cdc96e8eaab6 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

pull over http

  $ hg -R main serve -p $HGPORT -d --pid-file=main.pid -E main-error.log
  $ cat main.pid >> $DAEMON_PIDS

  $ hg -R other pull http://localhost:$HGPORT/ -r 42ccdea3bb16 --bookmark book_42cc
  pulling from http://localhost:$HGPORT/
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  1 new obsolescence markers
  updating bookmark book_42cc
  changegroup hook: HG_NODE=42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 HG_SOURCE=pull HG_URL=http://localhost:$HGPORT/
  b2x-transactionclose hook: HG_BOOKMARK_MOVED=1 HG_NEW_OBSMARKERS=1 HG_NODE=42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=http://localhost:$HGPORT/
  (run 'hg heads .' to see heads, 'hg merge' to merge)
  $ cat main-error.log
  $ hg -R other debugobsolete
  1111111111111111111111111111111111111111 9520eea781bcca16c1e15acc0ba14335a0e8e5ba 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  2222222222222222222222222222222222222222 24b6387c8c8cae37178880f3fa95ded3cb1cf785 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  3333333333333333333333333333333333333333 eea13746799a9e0bfd88f29d3c2e9dc9389f524f 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  4444444444444444444444444444444444444444 02de42196ebee42ef284b6780a87cdc96e8eaab6 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  5555555555555555555555555555555555555555 42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

push over ssh

  $ hg -R main push ssh://user@dummy/other -r 5fddd98957c8 --bookmark book_5fdd
  pushing to ssh://user@dummy/other
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: 1 new obsolescence markers
  updating bookmark book_5fdd
  remote: changegroup hook: HG_BUNDLE2-EXP=1 HG_NODE=5fddd98957c8a54a4d436dfe1da9d87f21a1b97b HG_SOURCE=serve HG_URL=remote:ssh:127.0.0.1
  remote: b2x-transactionclose hook: HG_BOOKMARK_MOVED=1 HG_BUNDLE2-EXP=1 HG_NEW_OBSMARKERS=1 HG_NODE=5fddd98957c8a54a4d436dfe1da9d87f21a1b97b HG_SOURCE=serve HG_URL=remote:ssh:127.0.0.1
  $ hg -R other log -G
  o  6:5fddd98957c8 draft Nicolas Dumazet <[e-mail]> book_5fdd C
  |
  o  5:42ccdea3bb16 draft Nicolas Dumazet <[e-mail]> book_42cc B
  |
  | o  4:02de42196ebe draft Nicolas Dumazet <[e-mail]> book_02de H
  | |
  | | o  3:eea13746799a public Nicolas Dumazet <[e-mail]> book_eea1 G
  | |/|
  | o |  2:24b6387c8c8c public Nicolas Dumazet <[e-mail]>  F
  |/ /
  | @  1:9520eea781bc public Nicolas Dumazet <[e-mail]>  E
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]> book_32af A
  
  $ hg -R other debugobsolete
  1111111111111111111111111111111111111111 9520eea781bcca16c1e15acc0ba14335a0e8e5ba 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  2222222222222222222222222222222222222222 24b6387c8c8cae37178880f3fa95ded3cb1cf785 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  3333333333333333333333333333333333333333 eea13746799a9e0bfd88f29d3c2e9dc9389f524f 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  4444444444444444444444444444444444444444 02de42196ebee42ef284b6780a87cdc96e8eaab6 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  5555555555555555555555555555555555555555 42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  6666666666666666666666666666666666666666 5fddd98957c8a54a4d436dfe1da9d87f21a1b97b 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

push over http

  $ hg -R other serve -p $HGPORT2 -d --pid-file=other.pid -E other-error.log
  $ cat other.pid >> $DAEMON_PIDS

  $ hg -R main phase --public 32af7686d403
  $ hg -R main push http://localhost:$HGPORT2/ -r 32af7686d403 --bookmark book_32af
  pushing to http://localhost:$HGPORT2/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: 1 new obsolescence markers
  updating bookmark book_32af
  $ cat other-error.log

Check final content.

  $ hg -R other log -G
  o  7:32af7686d403 public Nicolas Dumazet <[e-mail]> book_32af D
  |
  o  6:5fddd98957c8 public Nicolas Dumazet <[e-mail]> book_5fdd C
  |
  o  5:42ccdea3bb16 public Nicolas Dumazet <[e-mail]> book_42cc B
  |
  | o  4:02de42196ebe draft Nicolas Dumazet <[e-mail]> book_02de H
  | |
  | | o  3:eea13746799a public Nicolas Dumazet <[e-mail]> book_eea1 G
  | |/|
  | o |  2:24b6387c8c8c public Nicolas Dumazet <[e-mail]>  F
  |/ /
  | @  1:9520eea781bc public Nicolas Dumazet <[e-mail]>  E
  |/
  o  0:cd010b8cd998 public Nicolas Dumazet <[e-mail]>  A
  
  $ hg -R other debugobsolete
  1111111111111111111111111111111111111111 9520eea781bcca16c1e15acc0ba14335a0e8e5ba 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  2222222222222222222222222222222222222222 24b6387c8c8cae37178880f3fa95ded3cb1cf785 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  3333333333333333333333333333333333333333 eea13746799a9e0bfd88f29d3c2e9dc9389f524f 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  4444444444444444444444444444444444444444 02de42196ebee42ef284b6780a87cdc96e8eaab6 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  5555555555555555555555555555555555555555 42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  6666666666666666666666666666666666666666 5fddd98957c8a54a4d436dfe1da9d87f21a1b97b 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
  7777777777777777777777777777777777777777 32af7686d403cf45b5d95f2d70cebea587ac806a 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

Error Handling
==============

Check that errors are properly returned to the client during push.

Setting up

  $ cat > failpush.py << EOF
  > """A small extension that makes push fails when using bundle2
  > 
  > used to test error handling in bundle2
  > """
  > 
  > from mercurial import util
  > from mercurial import bundle2
  > from mercurial import exchange
  > from mercurial import extensions
  > 
  > def _pushbundle2failpart(pushop, bundler):
  >     reason = pushop.ui.config('failpush', 'reason', None)
  >     part = None
  >     if reason == 'abort':
  >         bundler.newpart('test:abort')
  >     if reason == 'unknown':
  >         bundler.newpart('TEST:UNKNOWN')
  >     if reason == 'race':
  >         # 20 Bytes of crap
  >         bundler.newpart('b2x:check:heads', data='01234567890123456789')
  > 
  > @bundle2.parthandler("test:abort")
  > def handleabort(op, part):
  >     raise util.Abort('Abandon ship!', hint="don't panic")
  > 
  > def uisetup(ui):
  >     exchange.b2partsgenmapping['failpart'] = _pushbundle2failpart
  >     exchange.b2partsgenorder.insert(0, 'failpart')
  > 
  > EOF

  $ cd main
  $ hg up tip
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo 'I' > I
  $ hg add I
  $ hg ci -m 'I'
  $ hg id
  e7ec4e813ba6 tip
  $ cd ..

  $ cat << EOF >> $HGRCPATH
  > [extensions]
  > failpush=$TESTTMP/failpush.py
  > EOF

  $ "$TESTDIR/killdaemons.py" $DAEMON_PIDS
  $ hg -R other serve -p $HGPORT2 -d --pid-file=other.pid -E other-error.log
  $ cat other.pid >> $DAEMON_PIDS

Doing the actual push: Abort error

  $ cat << EOF >> $HGRCPATH
  > [failpush]
  > reason = abort
  > EOF

  $ hg -R main push other -r e7ec4e813ba6
  pushing to other
  searching for changes
  abort: Abandon ship!
  (don't panic)
  [255]

  $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
  pushing to ssh://user@dummy/other
  searching for changes
  abort: Abandon ship!
  (don't panic)
  [255]

  $ hg -R main push http://localhost:$HGPORT2/ -r e7ec4e813ba6
  pushing to http://localhost:$HGPORT2/
  searching for changes
  abort: Abandon ship!
  (don't panic)
  [255]


Doing the actual push: unknown mandatory parts

  $ cat << EOF >> $HGRCPATH
  > [failpush]
  > reason = unknown
  > EOF

  $ hg -R main push other -r e7ec4e813ba6
  pushing to other
  searching for changes
  abort: missing support for test:unknown
  [255]

  $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
  pushing to ssh://user@dummy/other
  searching for changes
  abort: missing support for test:unknown
  [255]

  $ hg -R main push http://localhost:$HGPORT2/ -r e7ec4e813ba6
  pushing to http://localhost:$HGPORT2/
  searching for changes
  abort: missing support for test:unknown
  [255]

Doing the actual push: race

  $ cat << EOF >> $HGRCPATH
  > [failpush]
  > reason = race
  > EOF

  $ hg -R main push other -r e7ec4e813ba6
  pushing to other
  searching for changes
  abort: push failed:
  'repository changed while pushing - please try again'
  [255]

  $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
  pushing to ssh://user@dummy/other
  searching for changes
  abort: push failed:
  'repository changed while pushing - please try again'
  [255]

  $ hg -R main push http://localhost:$HGPORT2/ -r e7ec4e813ba6
  pushing to http://localhost:$HGPORT2/
  searching for changes
  abort: push failed:
  'repository changed while pushing - please try again'
  [255]

Doing the actual push: hook abort

  $ cat << EOF >> $HGRCPATH
  > [failpush]
  > reason =
  > [hooks]
  > b2x-pretransactionclose.failpush = false
  > EOF

  $ "$TESTDIR/killdaemons.py" $DAEMON_PIDS
  $ hg -R other serve -p $HGPORT2 -d --pid-file=other.pid -E other-error.log
  $ cat other.pid >> $DAEMON_PIDS

  $ hg -R main push other -r e7ec4e813ba6
  pushing to other
  searching for changes
  transaction abort!
  rollback completed
  changegroup hook: HG_BUNDLE2-EXP=1 HG_NODE=e7ec4e813ba6b07be2a0516ce1a74bb4e503f91a HG_SOURCE=push HG_URL=push
  abort: b2x-pretransactionclose.failpush hook exited with status 1
  [255]

  $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
  pushing to ssh://user@dummy/other
  searching for changes
  abort: b2x-pretransactionclose.failpush hook exited with status 1
  remote: transaction abort!
  remote: rollback completed
  remote: changegroup hook: HG_BUNDLE2-EXP=1 HG_NODE=e7ec4e813ba6b07be2a0516ce1a74bb4e503f91a HG_SOURCE=serve HG_URL=remote:ssh:127.0.0.1
  [255]

  $ hg -R main push http://localhost:$HGPORT2/ -r e7ec4e813ba6
  pushing to http://localhost:$HGPORT2/
  searching for changes
  abort: b2x-pretransactionclose.failpush hook exited with status 1
  [255]