diff options
| author |  Junio C Hamano <gitster@pobox.com> | 2012-02-05 16:22:12 -0800 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2012-02-05 16:30:26 -0800 |
| commit | b5c9f1c1b0ed9c91463b9f46a7c9dff3efc53773 (patch) | |
| tree | d7b10b778105afb6e211242204bb13d1c648d627 /t | |
| parent | Git 1.7.9 (diff) | |
| download | tgif-b5c9f1c1b0ed9c91463b9f46a7c9dff3efc53773.tar.xz | |
merge: do not create a signed tag merge under --ff-only option
Starting at release v1.7.9, if you ask to merge a signed tag, "git merge"
always creates a merge commit, even when the tag points at a commit that
happens to be a descendant of your current commit.
Unfortunately, this interacts rather badly for people who use --ff-only to
make sure that their branch is free of local developments. It used to be
possible to say:
$ git checkout -b frotz v1.7.9~30
$ git merge --ff-only v1.7.9
and expect that the resulting tip of frotz branch matches v1.7.9^0 (aka
the commit tagged as v1.7.9), but this fails with the updated Git with:
fatal: Not possible to fast-forward, aborting.
because a merge that merges v1.7.9 tag to v1.7.9~30 cannot be created by
fast forwarding.
We could teach users that now they have to do
$ git merge --ff-only v1.7.9^0
but it is far more pleasant for users if we DWIMmed this ourselves.
When an integrator pulls in a topic from a lieutenant via a signed tag,
even when the work done by the lieutenant happens to fast-forward, the
integrator wants to have a merge record, so the integrator will not be
asking for --ff-only when running "git pull" in such a case. Therefore,
this change should not regress the support for the use case v1.7.9 wanted
to add.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't')
| -rwxr-xr-x | t/t7600-merge.sh | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/t/t7600-merge.sh b/t/t7600-merge.sh index 5d8c428543..a598dfa477 100755 --- a/t/t7600-merge.sh +++ b/t/t7600-merge.sh @@ -27,6 +27,7 @@ Testing basic merge operations/option parsing. ' . ./test-lib.sh +. "$TEST_DIRECTORY"/lib-gpg.sh printf '%s\n' 1 2 3 4 5 6 7 8 9 >file printf '%s\n' '1 X' 2 3 4 5 6 7 8 9 >file.1 @@ -670,4 +671,16 @@ test_expect_success 'merge --no-ff --edit' ' test_cmp actual expected ' +test_expect_success GPG 'merge --ff-only tag' ' + git reset --hard c0 && + git commit --allow-empty -m "A newer commit" && + git tag -s -m "A newer commit" signed && + git reset --hard c0 && + + git merge --ff-only signed && + git rev-parse signed^0 >expect && + git rev-parse HEAD >actual && + test_cmp actual expect +' + test_done |