From 1e0dacdbdb751caa5936b6d1510f5e8db4d1ed5f Mon Sep 17 00:00:00 2001 From: John Keeping Date: Wed, 16 Jul 2014 20:23:49 +0100 Subject: rebase: omit patch-identical commits with --fork-point When the `--fork-point` argument was added to `git rebase`, we changed the value of $upstream to be the fork point instead of the point from which we want to rebase. When $orig_head..$upstream is empty this does not change the behaviour, but when there are new changes in the upstream we are no longer checking if any of them are patch-identical with changes in $upstream..$orig_head. Fix this by introducing a new variable to hold the fork point and using this to restrict the range as an extra (negative) revision argument so that the set of desired revisions becomes (in fork-point mode): git rev-list --cherry-pick --right-only \ $upstream...$orig_head ^$fork_point This allows us to correctly handle the scenario where we have the following topology: C --- D --- E <- dev / B <- master@{1} / o --- B' --- C* --- D* <- master where: - B' is a fixed-up version of B that is not patch-identical with B; - C* and D* are patch-identical to C and D respectively and conflict textually if applied in the wrong order; - E depends textually on D. The correct result of `git rebase master dev` is that B is identified as the fork-point of dev and master, so that C, D, E are the commits that need to be replayed onto master; but C and D are patch-identical with C* and D* and so can be dropped, so that the end result is: o --- B' --- C* --- D* --- E <- dev If the fork-point is not identified, then picking B onto a branch containing B' results in a conflict and if the patch-identical commits are not correctly identified then picking C onto a branch containing D (or equivalently D*) results in a conflict. This change allows us to handle both of these cases, where previously we either identified the fork-point (with `--fork-point`) but not the patch-identical commits *or* (with `--no-fork-point`) identified the patch-identical commits but not the fact that master had been rewritten. Reported-by: Ted Felix Signed-off-by: John Keeping Signed-off-by: Junio C Hamano --- t/t3400-rebase.sh | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 't') diff --git a/t/t3400-rebase.sh b/t/t3400-rebase.sh index 80e0a951ea..47b5682662 100755 --- a/t/t3400-rebase.sh +++ b/t/t3400-rebase.sh @@ -169,6 +169,29 @@ test_expect_success 'default to common base in @{upstream}s reflog if no upstrea test_cmp expect actual ' +test_expect_success 'cherry-picked commits and fork-point work together' ' + git checkout default-base && + echo Amended >A && + git commit -a --no-edit --amend && + test_commit B B && + test_commit new_B B "New B" && + test_commit C C && + git checkout default && + git reset --hard default-base@{4} && + test_commit D D && + git cherry-pick -2 default-base^ && + test_commit final_B B "Final B" && + git rebase && + echo Amended >expect && + test_cmp A expect && + echo "Final B" >expect && + test_cmp B expect && + echo C >expect && + test_cmp C expect && + echo D >expect && + test_cmp D expect +' + test_expect_success 'rebase -q is quiet' ' git checkout -b quiet topic && git rebase -q master >output.out 2>&1 && -- cgit v1.2.3