git/t/t6404-recursive-merge.sh

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#!/bin/sh
test_description='Test merge without common ancestors'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
tests: mark tests relying on the current default for `init.defaultBranch` In addition to the manual adjustment to let the `linux-gcc` CI job run the test suite with `master` and then with `main`, this patch makes sure that GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME is set in all test scripts that currently rely on the initial branch name being `master by default. To determine which test scripts to mark up, the first step was to force-set the default branch name to `master` in - all test scripts that contain the keyword `master`, - t4211, which expects `t/t4211/history.export` with a hard-coded ref to initialize the default branch, - t5560 because it sources `t/t556x_common` which uses `master`, - t8002 and t8012 because both source `t/annotate-tests.sh` which also uses `master`) This trick was performed by this command: $ sed -i '/^ *\. \.\/\(test-lib\|lib-\(bash\|cvs\|git-svn\)\|gitweb-lib\)\.sh$/i\ GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master\ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME\ ' $(git grep -l master t/t[0-9]*.sh) \ t/t4211*.sh t/t5560*.sh t/t8002*.sh t/t8012*.sh After that, careful, manual inspection revealed that some of the test scripts containing the needle `master` do not actually rely on a specific default branch name: either they mention `master` only in a comment, or they initialize that branch specificially, or they do not actually refer to the current default branch. Therefore, the aforementioned modification was undone in those test scripts thusly: $ git checkout HEAD -- \ t/t0027-auto-crlf.sh t/t0060-path-utils.sh \ t/t1011-read-tree-sparse-checkout.sh \ t/t1305-config-include.sh t/t1309-early-config.sh \ t/t1402-check-ref-format.sh t/t1450-fsck.sh \ t/t2024-checkout-dwim.sh \ t/t2106-update-index-assume-unchanged.sh \ t/t3040-subprojects-basic.sh t/t3301-notes.sh \ t/t3308-notes-merge.sh t/t3423-rebase-reword.sh \ t/t3436-rebase-more-options.sh \ t/t4015-diff-whitespace.sh t/t4257-am-interactive.sh \ t/t5323-pack-redundant.sh t/t5401-update-hooks.sh \ t/t5511-refspec.sh t/t5526-fetch-submodules.sh \ t/t5529-push-errors.sh t/t5530-upload-pack-error.sh \ t/t5548-push-porcelain.sh \ t/t5552-skipping-fetch-negotiator.sh \ t/t5572-pull-submodule.sh t/t5608-clone-2gb.sh \ t/t5614-clone-submodules-shallow.sh \ t/t7508-status.sh t/t7606-merge-custom.sh \ t/t9302-fast-import-unpack-limit.sh We excluded one set of test scripts in these commands, though: the range of `git p4` tests. The reason? `git p4` stores the (foreign) remote branch in the branch called `p4/master`, which is obviously not the default branch. Manual analysis revealed that only five of these tests actually require a specific default branch name to pass; They were modified thusly: $ sed -i '/^ *\. \.\/lib-git-p4\.sh$/i\ GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master\ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME\ ' t/t980[0167]*.sh t/t9811*.sh Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-18 23:44:19 +00:00
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
leak tests: mark passing SANITIZE=leak tests as leak-free Mark those remaining tests that pass when run under SANITIZE=leak with TEST_PASSES_SANITIZE_LEAK=true, these were either omitted in f346fcb62a0 (Merge branch 'ab/mark-leak-free-tests-even-more', 2021-12-15) and 5a4f8381b68 (Merge branch 'ab/mark-leak-free-tests', 2021-10-25), or have had their memory leaks fixed since then. With this change there's now a a one-to-one mapping between those tests that we have opted-in via "TEST_PASSES_SANITIZE_LEAK=true", and those that pass with the new "check" mode: GIT_TEST_PASSING_SANITIZE_LEAK=check \ GIT_TEST_SANITIZE_LEAK_LOG=true \ make test SANITIZE=leak Note that the "GIT_TEST_SANITIZE_LEAK_LOG=true" is needed due to the edge cases noted in a preceding commit, i.e. in some cases we'd pass the test itself, but still have outstanding leaks due to ignored exit codes. The "GIT_TEST_SANITIZE_LEAK_LOG=true" corrects for that, we're only marking those tests as passing that really don't have any leaks, whether that was reflected in their exit code or not. Note that the change here to "t9100-git-svn-basic.sh" is marking that test as passing under SANITIZE=leak, we're removing a "TEST_FAILS_SANITIZE_LEAK=true" line, not "TEST_PASSES_SANITIZE_LEAK=true". See 7a98d9ab00d (revisions API: have release_revisions() release "cmdline", 2022-04-13) for the introduction of that t/lib-git-svn.sh-specific variable. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-07-27 23:13:41 +00:00
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
# This scenario is based on a real-world repository of Shawn Pearce.
# 1 - A - D - F
# \ X /
# B X
# X \
# 2 - C - E - G
GIT_COMMITTER_DATE="2006-12-12 23:28:00 +0100"
export GIT_COMMITTER_DATE
test_expect_success 'setup tests' '
commit-reach: use corrected commit dates in paint_down_to_common() 091f4cf (commit: don't use generation numbers if not needed, 2018-08-30) changed paint_down_to_common() to use commit dates instead of generation numbers v1 (topological levels) as the performance regressed on certain topologies. With generation number v2 (corrected commit dates) implemented, we no longer have to rely on commit dates and can use generation numbers. For example, the command `git merge-base v4.8 v4.9` on the Linux repository walks 167468 commits, taking 0.135s for committer date and 167496 commits, taking 0.157s for corrected committer date respectively. While using corrected commit dates, Git walks nearly the same number of commits as commit date, the process is slower as for each comparision we have to access a commit-slab (for corrected committer date) instead of accessing struct member (for committer date). This change incidentally broke the fragile t6404-recursive-merge test. t6404-recursive-merge sets up a unique repository where all commits have the same committer date without a well-defined merge-base. While running tests with GIT_TEST_COMMIT_GRAPH unset, we use committer date as a heuristic in paint_down_to_common(). 6404.1 'combined merge conflicts' merges commits in the order: - Merge C with B to form an intermediate commit. - Merge the intermediate commit with A. With GIT_TEST_COMMIT_GRAPH=1, we write a commit-graph and subsequently use the corrected committer date, which changes the order in which commits are merged: - Merge A with B to form an intermediate commit. - Merge the intermediate commit with C. While resulting repositories are equivalent, 6404.4 'virtual trees were processed' fails with GIT_TEST_COMMIT_GRAPH=1 as we are selecting different merge-bases and thus have different object ids for the intermediate commits. As this has already causes problems (as noted in 859fdc0 (commit-graph: define GIT_TEST_COMMIT_GRAPH, 2018-08-29)), we disable commit graph within t6404-recursive-merge. Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com> Reviewed-by: Taylor Blau <me@ttaylorr.com> Reviewed-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-01-16 18:11:17 +00:00
GIT_TEST_COMMIT_GRAPH=0 &&
export GIT_TEST_COMMIT_GRAPH &&
echo 1 >a1 &&
git add a1 &&
GIT_AUTHOR_DATE="2006-12-12 23:00:00" git commit -m 1 a1 &&
git checkout -b A main &&
echo A >a1 &&
GIT_AUTHOR_DATE="2006-12-12 23:00:01" git commit -m A a1 &&
git checkout -b B main &&
echo B >a1 &&
GIT_AUTHOR_DATE="2006-12-12 23:00:02" git commit -m B a1 &&
git checkout -b D A &&
git rev-parse B >.git/MERGE_HEAD &&
echo D >a1 &&
git update-index a1 &&
GIT_AUTHOR_DATE="2006-12-12 23:00:03" git commit -m D &&
git symbolic-ref HEAD refs/heads/other &&
echo 2 >a1 &&
GIT_AUTHOR_DATE="2006-12-12 23:00:04" git commit -m 2 a1 &&
git checkout -b C &&
echo C >a1 &&
GIT_AUTHOR_DATE="2006-12-12 23:00:05" git commit -m C a1 &&
git checkout -b E C &&
git rev-parse B >.git/MERGE_HEAD &&
echo E >a1 &&
git update-index a1 &&
GIT_AUTHOR_DATE="2006-12-12 23:00:06" git commit -m E &&
git checkout -b G E &&
git rev-parse A >.git/MERGE_HEAD &&
echo G >a1 &&
git update-index a1 &&
GIT_AUTHOR_DATE="2006-12-12 23:00:07" git commit -m G &&
git checkout -b F D &&
git rev-parse C >.git/MERGE_HEAD &&
echo F >a1 &&
git update-index a1 &&
GIT_AUTHOR_DATE="2006-12-12 23:00:08" git commit -m F &&
test_oid_cache <<-EOF
idxstage1 sha1:ec3fe2a791706733f2d8fa7ad45d9a9672031f5e
idxstage1 sha256:b3c8488929903aaebdeb22270cb6d36e5b8724b01ae0d4da24632f158c99676f
EOF
'
test_expect_success 'combined merge conflicts' '
commit-reach: use corrected commit dates in paint_down_to_common() 091f4cf (commit: don't use generation numbers if not needed, 2018-08-30) changed paint_down_to_common() to use commit dates instead of generation numbers v1 (topological levels) as the performance regressed on certain topologies. With generation number v2 (corrected commit dates) implemented, we no longer have to rely on commit dates and can use generation numbers. For example, the command `git merge-base v4.8 v4.9` on the Linux repository walks 167468 commits, taking 0.135s for committer date and 167496 commits, taking 0.157s for corrected committer date respectively. While using corrected commit dates, Git walks nearly the same number of commits as commit date, the process is slower as for each comparision we have to access a commit-slab (for corrected committer date) instead of accessing struct member (for committer date). This change incidentally broke the fragile t6404-recursive-merge test. t6404-recursive-merge sets up a unique repository where all commits have the same committer date without a well-defined merge-base. While running tests with GIT_TEST_COMMIT_GRAPH unset, we use committer date as a heuristic in paint_down_to_common(). 6404.1 'combined merge conflicts' merges commits in the order: - Merge C with B to form an intermediate commit. - Merge the intermediate commit with A. With GIT_TEST_COMMIT_GRAPH=1, we write a commit-graph and subsequently use the corrected committer date, which changes the order in which commits are merged: - Merge A with B to form an intermediate commit. - Merge the intermediate commit with C. While resulting repositories are equivalent, 6404.4 'virtual trees were processed' fails with GIT_TEST_COMMIT_GRAPH=1 as we are selecting different merge-bases and thus have different object ids for the intermediate commits. As this has already causes problems (as noted in 859fdc0 (commit-graph: define GIT_TEST_COMMIT_GRAPH, 2018-08-29)), we disable commit graph within t6404-recursive-merge. Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com> Reviewed-by: Taylor Blau <me@ttaylorr.com> Reviewed-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-01-16 18:11:17 +00:00
test_must_fail git merge -m final G
'
test_expect_success 'result contains a conflict' '
cat >expect <<-\EOF &&
<<<<<<< HEAD
F
=======
G
>>>>>>> G
EOF
test_cmp expect a1
'
test_expect_success 'virtual trees were processed' '
commit-reach: use corrected commit dates in paint_down_to_common() 091f4cf (commit: don't use generation numbers if not needed, 2018-08-30) changed paint_down_to_common() to use commit dates instead of generation numbers v1 (topological levels) as the performance regressed on certain topologies. With generation number v2 (corrected commit dates) implemented, we no longer have to rely on commit dates and can use generation numbers. For example, the command `git merge-base v4.8 v4.9` on the Linux repository walks 167468 commits, taking 0.135s for committer date and 167496 commits, taking 0.157s for corrected committer date respectively. While using corrected commit dates, Git walks nearly the same number of commits as commit date, the process is slower as for each comparision we have to access a commit-slab (for corrected committer date) instead of accessing struct member (for committer date). This change incidentally broke the fragile t6404-recursive-merge test. t6404-recursive-merge sets up a unique repository where all commits have the same committer date without a well-defined merge-base. While running tests with GIT_TEST_COMMIT_GRAPH unset, we use committer date as a heuristic in paint_down_to_common(). 6404.1 'combined merge conflicts' merges commits in the order: - Merge C with B to form an intermediate commit. - Merge the intermediate commit with A. With GIT_TEST_COMMIT_GRAPH=1, we write a commit-graph and subsequently use the corrected committer date, which changes the order in which commits are merged: - Merge A with B to form an intermediate commit. - Merge the intermediate commit with C. While resulting repositories are equivalent, 6404.4 'virtual trees were processed' fails with GIT_TEST_COMMIT_GRAPH=1 as we are selecting different merge-bases and thus have different object ids for the intermediate commits. As this has already causes problems (as noted in 859fdc0 (commit-graph: define GIT_TEST_COMMIT_GRAPH, 2018-08-29)), we disable commit graph within t6404-recursive-merge. Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com> Reviewed-by: Taylor Blau <me@ttaylorr.com> Reviewed-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-01-16 18:11:17 +00:00
# TODO: fragile test, relies on ambigious merge-base resolution
git ls-files --stage >out &&
cat >expect <<-EOF &&
100644 $(test_oid idxstage1) 1 a1
100644 $(git rev-parse F:a1) 2 a1
100644 $(git rev-parse G:a1) 3 a1
EOF
test_cmp expect out
'
test_expect_success 'refuse to merge binary files' '
git reset --hard &&
printf "\0" >binary-file &&
git add binary-file &&
git commit -m binary &&
git checkout G &&
printf "\0\0" >binary-file &&
git add binary-file &&
git commit -m binary2 &&
if test "$GIT_TEST_MERGE_ALGORITHM" = ort
then
test_must_fail git merge F >merge_output
else
test_must_fail git merge F 2>merge_output
fi &&
grep "Cannot merge binary files: binary-file (HEAD vs. F)" merge_output
'
test_expect_success 'mark rename/delete as unmerged' '
git reset --hard &&
git checkout -b delete &&
git rm a1 &&
test_tick &&
git commit -m delete &&
git checkout -b rename HEAD^ &&
git mv a1 a2 &&
test_tick &&
git commit -m rename &&
test_must_fail git merge delete &&
if test "$GIT_TEST_MERGE_ALGORITHM" = ort
then
test 2 = $(git ls-files --unmerged | wc -l)
else
test 1 = $(git ls-files --unmerged | wc -l)
fi &&
git rev-parse --verify :2:a2 &&
test_must_fail git rev-parse --verify :3:a2 &&
git checkout -f delete &&
test_must_fail git merge rename &&
if test "$GIT_TEST_MERGE_ALGORITHM" = ort
then
test 2 = $(git ls-files --unmerged | wc -l)
else
test 1 = $(git ls-files --unmerged | wc -l)
fi &&
test_must_fail git rev-parse --verify :2:a2 &&
git rev-parse --verify :3:a2
'
test_done