c0efb4c1dd
Before, when we had the following graph, A---B---C (master) \ D (side) running 'git rebase --onto master... master side' would result in D being always rebased, no matter what. However, the desired behavior is that rebase should notice that this is fast-forwardable and do that instead. Add detection to `can_fast_forward` so that this case can be detected and a fast-forward will be performed. First of all, rewrite the function to use gotos which simplifies the logic. Next, since the options.upstream && !oidcmp(&options.upstream->object.oid, &options.onto->object.oid) conditions were removed in `cmd_rebase`, we reintroduce a substitute in `can_fast_forward`. In particular, checking the merge bases of `upstream` and `head` fixes a failing case in t3416. The abbreviated graph for t3416 is as follows: F---G topic / A---B---C---D---E master and the failing command was git rebase --onto master...topic F topic Before, Git would see that there was one merge base (C), and the merge and onto were the same so it would incorrectly return 1, indicating that we could fast-forward. This would cause the rebased graph to be 'ABCFG' when we were expecting 'ABCG'. With the additional logic, we detect that upstream and head's merge base is F. Since onto isn't F, it means we're not rebasing the full set of commits from master..topic. Since we're excluding some commits, a fast-forward cannot be performed and so we correctly return 0. Add '-f' to test cases that failed as a result of this change because they were not expecting a fast-forward so that a rebase is forced. Helped-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
339 lines
9.0 KiB
Bash
Executable File
339 lines
9.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2005 Amos Waterland
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#
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test_description='git rebase assorted tests
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This test runs git rebase and checks that the author information is not lost
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among other things.
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'
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. ./test-lib.sh
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GIT_AUTHOR_NAME=author@name
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GIT_AUTHOR_EMAIL=bogus@email@address
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export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL
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test_expect_success 'prepare repository with topic branches' '
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git config core.logAllRefUpdates true &&
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echo First >A &&
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git update-index --add A &&
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git commit -m "Add A." &&
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git checkout -b force-3way &&
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echo Dummy >Y &&
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git update-index --add Y &&
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git commit -m "Add Y." &&
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git checkout -b filemove &&
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git reset --soft master &&
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mkdir D &&
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git mv A D/A &&
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git commit -m "Move A." &&
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git checkout -b my-topic-branch master &&
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echo Second >B &&
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git update-index --add B &&
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git commit -m "Add B." &&
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git checkout -f master &&
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echo Third >>A &&
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git update-index A &&
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git commit -m "Modify A." &&
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git checkout -b side my-topic-branch &&
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echo Side >>C &&
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git add C &&
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git commit -m "Add C" &&
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git checkout -f my-topic-branch &&
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git tag topic
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'
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test_expect_success 'rebase on dirty worktree' '
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echo dirty >>A &&
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test_must_fail git rebase master
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'
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test_expect_success 'rebase on dirty cache' '
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git add A &&
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test_must_fail git rebase master
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'
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test_expect_success 'rebase against master' '
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git reset --hard HEAD &&
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git rebase master
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'
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test_expect_success 'rebase sets ORIG_HEAD to pre-rebase state' '
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git checkout -b orig-head topic &&
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pre="$(git rev-parse --verify HEAD)" &&
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git rebase master &&
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test_cmp_rev "$pre" ORIG_HEAD &&
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! test_cmp_rev "$pre" HEAD
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'
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test_expect_success 'rebase, with <onto> and <upstream> specified as :/quuxery' '
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test_when_finished "git branch -D torebase" &&
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git checkout -b torebase my-topic-branch^ &&
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upstream=$(git rev-parse ":/Add B") &&
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onto=$(git rev-parse ":/Add A") &&
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git rebase --onto $onto $upstream &&
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git reset --hard my-topic-branch^ &&
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git rebase --onto ":/Add A" ":/Add B" &&
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git checkout my-topic-branch
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'
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test_expect_success 'the rebase operation should not have destroyed author information' '
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! (git log | grep "Author:" | grep "<>")
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'
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test_expect_success 'the rebase operation should not have destroyed author information (2)' "
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git log -1 |
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grep 'Author: $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL>'
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"
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test_expect_success 'HEAD was detached during rebase' '
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test $(git rev-parse HEAD@{1}) != $(git rev-parse my-topic-branch@{1})
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'
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test_expect_success 'rebase from ambiguous branch name' '
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git checkout -b topic side &&
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git rebase master
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'
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test_expect_success 'rebase off of the previous branch using "-"' '
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git checkout master &&
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git checkout HEAD^ &&
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git rebase @{-1} >expect.messages &&
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git merge-base master HEAD >expect.forkpoint &&
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git checkout master &&
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git checkout HEAD^ &&
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git rebase - >actual.messages &&
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git merge-base master HEAD >actual.forkpoint &&
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test_cmp expect.forkpoint actual.forkpoint &&
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# the next one is dubious---we may want to say "-",
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# instead of @{-1}, in the message
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test_i18ncmp expect.messages actual.messages
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'
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test_expect_success 'rebase a single mode change' '
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git checkout master &&
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git branch -D topic &&
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echo 1 >X &&
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git add X &&
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test_tick &&
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git commit -m prepare &&
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git checkout -b modechange HEAD^ &&
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echo 1 >X &&
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git add X &&
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test_chmod +x A &&
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test_tick &&
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git commit -m modechange &&
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GIT_TRACE=1 git rebase master
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'
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test_expect_success 'rebase is not broken by diff.renames' '
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test_config diff.renames copies &&
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git checkout filemove &&
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GIT_TRACE=1 git rebase force-3way
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'
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test_expect_success 'setup: recover' '
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test_might_fail git rebase --abort &&
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git reset --hard &&
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git checkout modechange
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'
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test_expect_success 'Show verbose error when HEAD could not be detached' '
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>B &&
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test_must_fail git rebase topic 2>output.err >output.out &&
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test_i18ngrep "The following untracked working tree files would be overwritten by checkout:" output.err &&
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test_i18ngrep B output.err
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'
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rm -f B
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test_expect_success 'fail when upstream arg is missing and not on branch' '
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git checkout topic &&
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test_must_fail git rebase
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'
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test_expect_success 'fail when upstream arg is missing and not configured' '
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git checkout -b no-config topic &&
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test_must_fail git rebase
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'
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test_expect_success 'default to common base in @{upstream}s reflog if no upstream arg' '
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git checkout -b default-base master &&
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git checkout -b default topic &&
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git config branch.default.remote . &&
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git config branch.default.merge refs/heads/default-base &&
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git rebase &&
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git rev-parse --verify default-base >expect &&
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git rev-parse default~1 >actual &&
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test_cmp expect actual &&
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git checkout default-base &&
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git reset --hard HEAD^ &&
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git checkout default &&
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git rebase &&
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git rev-parse --verify default-base >expect &&
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git rev-parse default~1 >actual &&
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test_cmp expect actual
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'
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test_expect_success 'cherry-picked commits and fork-point work together' '
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git checkout default-base &&
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echo Amended >A &&
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git commit -a --no-edit --amend &&
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test_commit B B &&
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test_commit new_B B "New B" &&
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test_commit C C &&
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git checkout default &&
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git reset --hard default-base@{4} &&
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test_commit D D &&
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git cherry-pick -2 default-base^ &&
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test_commit final_B B "Final B" &&
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git rebase &&
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echo Amended >expect &&
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test_cmp expect A &&
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echo "Final B" >expect &&
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test_cmp expect B &&
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echo C >expect &&
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test_cmp expect C &&
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echo D >expect &&
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test_cmp expect D
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'
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test_expect_success 'rebase -q is quiet' '
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git checkout -b quiet topic &&
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git rebase -q master >output.out 2>&1 &&
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test_must_be_empty output.out
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'
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test_expect_success 'Rebase a commit that sprinkles CRs in' '
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(
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echo "One" &&
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echo "TwoQ" &&
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echo "Three" &&
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echo "FQur" &&
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echo "Five"
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) | q_to_cr >CR &&
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git add CR &&
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test_tick &&
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git commit -a -m "A file with a line with CR" &&
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git tag file-with-cr &&
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git checkout HEAD^0 &&
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git rebase --onto HEAD^^ HEAD^ &&
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git diff --exit-code file-with-cr:CR HEAD:CR
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'
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test_expect_success 'rebase can copy notes' '
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git config notes.rewrite.rebase true &&
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git config notes.rewriteRef "refs/notes/*" &&
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test_commit n1 &&
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test_commit n2 &&
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test_commit n3 &&
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git notes add -m"a note" n3 &&
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git rebase --onto n1 n2 &&
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test "a note" = "$(git notes show HEAD)"
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'
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test_expect_success 'rebase -m can copy notes' '
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git reset --hard n3 &&
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git rebase -m --onto n1 n2 &&
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test "a note" = "$(git notes show HEAD)"
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'
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test_expect_success 'rebase commit with an ancient timestamp' '
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git reset --hard &&
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>old.one && git add old.one && test_tick &&
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git commit --date="@12345 +0400" -m "Old one" &&
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>old.two && git add old.two && test_tick &&
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git commit --date="@23456 +0500" -m "Old two" &&
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>old.three && git add old.three && test_tick &&
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git commit --date="@34567 +0600" -m "Old three" &&
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git cat-file commit HEAD^^ >actual &&
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grep "author .* 12345 +0400$" actual &&
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git cat-file commit HEAD^ >actual &&
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grep "author .* 23456 +0500$" actual &&
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git cat-file commit HEAD >actual &&
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grep "author .* 34567 +0600$" actual &&
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git rebase --onto HEAD^^ HEAD^ &&
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git cat-file commit HEAD >actual &&
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grep "author .* 34567 +0600$" actual
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'
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test_expect_success 'rebase with "From " line in commit message' '
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git checkout -b preserve-from master~1 &&
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cat >From_.msg <<EOF &&
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Somebody embedded an mbox in a commit message
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This is from so-and-so:
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From a@b Mon Sep 17 00:00:00 2001
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From: John Doe <nobody@example.com>
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Date: Sat, 11 Nov 2017 00:00:00 +0000
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Subject: not this message
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something
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EOF
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>From_ &&
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git add From_ &&
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git commit -F From_.msg &&
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git rebase master &&
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git log -1 --pretty=format:%B >out &&
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test_cmp From_.msg out
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'
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test_expect_success 'rebase --am and --show-current-patch' '
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test_create_repo conflict-apply &&
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(
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cd conflict-apply &&
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test_commit init &&
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echo one >>init.t &&
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git commit -a -m one &&
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echo two >>init.t &&
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git commit -a -m two &&
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git tag two &&
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test_must_fail git rebase -f --onto init HEAD^ &&
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GIT_TRACE=1 git rebase --show-current-patch >/dev/null 2>stderr &&
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grep "show.*$(git rev-parse two)" stderr
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)
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'
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test_expect_success 'rebase--merge.sh and --show-current-patch' '
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test_create_repo conflict-merge &&
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(
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cd conflict-merge &&
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test_commit init &&
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echo one >>init.t &&
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git commit -a -m one &&
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echo two >>init.t &&
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git commit -a -m two &&
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git tag two &&
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test_must_fail git rebase --merge --onto init HEAD^ &&
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git rebase --show-current-patch >actual.patch &&
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GIT_TRACE=1 git rebase --show-current-patch >/dev/null 2>stderr &&
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grep "show.*REBASE_HEAD" stderr &&
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test "$(git rev-parse REBASE_HEAD)" = "$(git rev-parse two)"
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)
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'
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test_expect_success 'rebase -c rebase.useBuiltin=false warning' '
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expected="rebase.useBuiltin support has been removed" &&
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# Only warn when the legacy rebase is requested...
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test_must_fail git -c rebase.useBuiltin=false rebase 2>err &&
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test_i18ngrep "$expected" err &&
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test_must_fail env GIT_TEST_REBASE_USE_BUILTIN=false git rebase 2>err &&
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test_i18ngrep "$expected" err &&
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# ...not when we would have used the built-in anyway
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test_must_fail git -c rebase.useBuiltin=true rebase 2>err &&
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test_must_be_empty err &&
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test_must_fail env GIT_TEST_REBASE_USE_BUILTIN=true git rebase 2>err &&
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test_must_be_empty err
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'
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test_done
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