tests/test-rollback.t

subrepo: lazily update git's local tracking branches

This continues the strategy of separation between hg pull and hg update in
git subrepos by only dealing with git's branches on an update. This behavior
tries to cover the bare essentials of the semantics of git pull in the subrepo
when the parent repo does hg pull and hg update.

  $ mkdir t
  $ cd t
  $ hg init
  $ echo a > a
  $ hg add a
  $ hg commit -m "test"
  $ hg verify
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  1 files, 1 changesets, 1 total revisions
  $ hg parents
  changeset:   0:acb14030fe0a
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     test
  
  $ hg status
  $ hg rollback
  rolling back to revision -1 (undo commit)
  $ hg verify
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  0 files, 0 changesets, 0 total revisions
  $ hg parents
  $ hg status
  A a

Test issue 902

  $ hg commit -m "test2"
  $ hg branch test
  marked working directory as branch test
  $ hg rollback
  rolling back to revision -1 (undo commit)
  $ hg branch
  default

Test issue 1635 (commit message saved)
.hg/last-message.txt:

  $ cat .hg/last-message.txt ; echo
  test2

Test rollback of hg before issue 902 was fixed

  $ hg commit -m "test3"
  $ hg branch test
  marked working directory as branch test
  $ rm .hg/undo.branch
  $ hg rollback
  rolling back to revision -1 (undo commit)
  Named branch could not be reset, current branch still is: test
  $ hg branch
  test

rollback by pretxncommit saves commit message (issue 1635)

  $ echo a >> a
  $ hg --config hooks.pretxncommit=false commit -m"precious commit message"
  transaction abort!
  rollback completed
  abort: pretxncommit hook exited with status * (glob)
  [255]

.hg/last-message.txt:

  $ cat .hg/last-message.txt ; echo
  precious commit message
  $ echo '% same thing, but run $EDITOR'
  % same thing, but run $EDITOR
  $ cat > editor << '__EOF__'
  > #!/bin/sh
  > echo "another precious commit message" > "$1"
  > __EOF__
  $ chmod +x editor
  $ HGEDITOR="'`pwd`'"/editor hg --config hooks.pretxncommit=false commit 2>&1
  transaction abort!
  rollback completed
  note: commit message saved in .hg/last-message.txt
  abort: pretxncommit hook exited with status * (glob)
  [255]
  $ cat .hg/last-message.txt
  another precious commit message

.hg/last-message.txt: