$ 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 > $HGTMP/editor <<'__EOF__'
> #!/bin/sh
> echo "another precious commit message" > "$1"
> __EOF__
> chmod +x "$HGTMP"/editor
> HGEDITOR="'$HGTMP'"/editor hg --config hooks.pretxncommit=false commit 2>&1
> cat .hg/last-message.txt
transaction abort!
rollback completed
note: commit message saved in .hg/last-message.txt
abort: pretxncommit hook exited with status * (glob)
another precious commit message
.hg/last-message.txt: