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git-commit-vandalism/t/t6430-merge-recursive.sh
Elijah Newren f06481f127 t/: new helper for tests that pass with ort but fail with recursive 
There are a number of tests that the "recursive" backend does not handle
correctly but which the redesign in "ort" will.  Add a new helper in
lib-merge.sh for selecting a different test expectation based on the
setting of GIT_TEST_MERGE_ALGORITHM, and use it in various testcases to
document which ones we expect to fail under recursive but pass under
ort.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-26 12:31:23 -07:00

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#!/bin/sh
test_description='merge-recursive backend test'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-merge.sh
test_expect_success 'setup 1' '
echo hello >a &&
o0=$(git hash-object a) &&
cp a b &&
cp a c &&
mkdir d &&
cp a d/e &&
test_tick &&
git add a b c d/e &&
git commit -m initial &&
c0=$(git rev-parse --verify HEAD) &&
git branch side &&
git branch df-1 &&
git branch df-2 &&
git branch df-3 &&
git branch remove &&
git branch submod &&
git branch copy &&
git branch rename &&
git branch rename-ln &&
echo hello >>a &&
cp a d/e &&
o1=$(git hash-object a) &&
git add a d/e &&
test_tick &&
git commit -m "master modifies a and d/e" &&
c1=$(git rev-parse --verify HEAD) &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o1 a" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o1 d/e" &&
echo "100644 $o1 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o1 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'setup 2' '
rm -rf [abcd] &&
git checkout side &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o0 a" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 $o0 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e"
) >expected &&
test_cmp expected actual &&
echo goodbye >>a &&
o2=$(git hash-object a) &&
git add a &&
test_tick &&
git commit -m "side modifies a" &&
c2=$(git rev-parse --verify HEAD) &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o2 a" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 $o2 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'setup 3' '
rm -rf [abcd] &&
git checkout df-1 &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o0 a" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 $o0 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e"
) >expected &&
test_cmp expected actual &&
rm -f b && mkdir b && echo df-1 >b/c && git add b/c &&
o3=$(git hash-object b/c) &&
test_tick &&
git commit -m "df-1 makes b/c" &&
c3=$(git rev-parse --verify HEAD) &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o0 a" &&
echo "100644 blob $o3 b/c" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 $o0 0 a" &&
echo "100644 $o3 0 b/c" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'setup 4' '
rm -rf [abcd] &&
git checkout df-2 &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o0 a" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 $o0 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e"
) >expected &&
test_cmp expected actual &&
rm -f a && mkdir a && echo df-2 >a/c && git add a/c &&
o4=$(git hash-object a/c) &&
test_tick &&
git commit -m "df-2 makes a/c" &&
c4=$(git rev-parse --verify HEAD) &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o4 a/c" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 $o4 0 a/c" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'setup 5' '
rm -rf [abcd] &&
git checkout remove &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o0 a" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 $o0 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e"
) >expected &&
test_cmp expected actual &&
rm -f b &&
echo remove-conflict >a &&
git add a &&
git rm b &&
o5=$(git hash-object a) &&
test_tick &&
git commit -m "remove removes b and modifies a" &&
c5=$(git rev-parse --verify HEAD) &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o5 a" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 $o5 0 a" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'setup 6' '
rm -rf [abcd] &&
git checkout df-3 &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o0 a" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 $o0 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e"
) >expected &&
test_cmp expected actual &&
rm -fr d && echo df-3 >d && git add d &&
o6=$(git hash-object d) &&
test_tick &&
git commit -m "df-3 makes d" &&
c6=$(git rev-parse --verify HEAD) &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o0 a" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o6 d" &&
echo "100644 $o0 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o6 0 d"
) >expected &&
test_cmp expected actual
'
test_expect_success 'setup 7' '
git checkout submod &&
git rm d/e &&
test_tick &&
git commit -m "remove d/e" &&
git update-index --add --cacheinfo 160000 $c1 d &&
test_tick &&
git commit -m "make d/ a submodule"
'
test_expect_success 'setup 8' '
git checkout rename &&
git mv a e &&
git add e &&
test_tick &&
git commit -m "rename a->e" &&
c7=$(git rev-parse --verify HEAD) &&
git checkout rename-ln &&
git mv a e &&
test_ln_s_add e a &&
test_tick &&
git commit -m "rename a->e, symlink a->e" &&
oln=$(printf e | git hash-object --stdin)
'
test_expect_success 'setup 9' '
git checkout copy &&
cp a e &&
git add e &&
test_tick &&
git commit -m "copy a->e"
'
test_expect_success 'merge-recursive simple' '
rm -fr [abcd] &&
git checkout -f "$c2" &&
test_expect_code 1 git merge-recursive "$c0" -- "$c2" "$c1"
'
test_expect_success 'merge-recursive result' '
git ls-files -s >actual &&
(
echo "100644 $o0 1 a" &&
echo "100644 $o2 2 a" &&
echo "100644 $o1 3 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o1 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'fail if the index has unresolved entries' '
rm -fr [abcd] &&
git checkout -f "$c1" &&
test_must_fail git merge "$c5" &&
test_must_fail git merge "$c5" 2> out &&
test_i18ngrep "not possible because you have unmerged files" out &&
git add -u &&
test_must_fail git merge "$c5" 2> out &&
test_i18ngrep "You have not concluded your merge" out &&
rm -f .git/MERGE_HEAD &&
test_must_fail git merge "$c5" 2> out &&
test_i18ngrep "Your local changes to the following files would be overwritten by merge:" out
'
test_expect_success 'merge-recursive remove conflict' '
rm -fr [abcd] &&
git checkout -f "$c1" &&
test_expect_code 1 git merge-recursive "$c0" -- "$c1" "$c5"
'
test_expect_success 'merge-recursive remove conflict' '
git ls-files -s >actual &&
(
echo "100644 $o0 1 a" &&
echo "100644 $o1 2 a" &&
echo "100644 $o5 3 a" &&
echo "100644 $o0 0 c" &&
echo "100644 $o1 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'merge-recursive d/f simple' '
rm -fr [abcd] &&
git reset --hard &&
git checkout -f "$c1" &&
git merge-recursive "$c0" -- "$c1" "$c3"
'
test_expect_success 'merge-recursive result' '
git ls-files -s >actual &&
(
echo "100644 $o1 0 a" &&
echo "100644 $o3 0 b/c" &&
echo "100644 $o0 0 c" &&
echo "100644 $o1 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'merge-recursive d/f conflict' '
rm -fr [abcd] &&
git reset --hard &&
git checkout -f "$c1" &&
test_expect_code 1 git merge-recursive "$c0" -- "$c1" "$c4"
'
test_expect_success 'merge-recursive d/f conflict result' '
git ls-files -s >actual &&
(
echo "100644 $o0 1 a" &&
echo "100644 $o1 2 a" &&
echo "100644 $o4 0 a/c" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o1 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'merge-recursive d/f conflict the other way' '
rm -fr [abcd] &&
git reset --hard &&
git checkout -f "$c4" &&
test_expect_code 1 git merge-recursive "$c0" -- "$c4" "$c1"
'
test_expect_success 'merge-recursive d/f conflict result the other way' '
git ls-files -s >actual &&
(
echo "100644 $o0 1 a" &&
echo "100644 $o1 3 a" &&
echo "100644 $o4 0 a/c" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o1 0 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'merge-recursive d/f conflict' '
rm -fr [abcd] &&
git reset --hard &&
git checkout -f "$c1" &&
test_expect_code 1 git merge-recursive "$c0" -- "$c1" "$c6"
'
test_expect_success 'merge-recursive d/f conflict result' '
git ls-files -s >actual &&
(
echo "100644 $o1 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o6 3 d" &&
echo "100644 $o0 1 d/e" &&
echo "100644 $o1 2 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'merge-recursive d/f conflict' '
rm -fr [abcd] &&
git reset --hard &&
git checkout -f "$c6" &&
test_expect_code 1 git merge-recursive "$c0" -- "$c6" "$c1"
'
test_expect_success 'merge-recursive d/f conflict result' '
git ls-files -s >actual &&
(
echo "100644 $o1 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o6 2 d" &&
echo "100644 $o0 1 d/e" &&
echo "100644 $o1 3 d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success SYMLINKS 'dir in working tree with symlink ancestor does not produce d/f conflict' '
git init sym &&
(
cd sym &&
ln -s . foo &&
mkdir bar &&
>bar/file &&
git add foo bar/file &&
git commit -m "foo symlink" &&
git checkout -b branch1 &&
git commit --allow-empty -m "empty commit" &&
git checkout master &&
git rm foo &&
mkdir foo &&
>foo/bar &&
git add foo/bar &&
git commit -m "replace foo symlink with real foo dir and foo/bar file" &&
git checkout branch1 &&
git cherry-pick master &&
test_path_is_dir foo &&
test_path_is_file foo/bar
)
'
test_expect_success 'reset and 3-way merge' '
git reset --hard "$c2" &&
git read-tree -m "$c0" "$c2" "$c1"
'
test_expect_success 'reset and bind merge' '
git reset --hard master &&
git read-tree --prefix=M/ master &&
git ls-files -s >actual &&
(
echo "100644 $o1 0 M/a" &&
echo "100644 $o0 0 M/b" &&
echo "100644 $o0 0 M/c" &&
echo "100644 $o1 0 M/d/e" &&
echo "100644 $o1 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o1 0 d/e"
) >expected &&
test_cmp expected actual &&
git read-tree --prefix=a1/ master &&
git ls-files -s >actual &&
(
echo "100644 $o1 0 M/a" &&
echo "100644 $o0 0 M/b" &&
echo "100644 $o0 0 M/c" &&
echo "100644 $o1 0 M/d/e" &&
echo "100644 $o1 0 a" &&
echo "100644 $o1 0 a1/a" &&
echo "100644 $o0 0 a1/b" &&
echo "100644 $o0 0 a1/c" &&
echo "100644 $o1 0 a1/d/e" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o1 0 d/e"
) >expected &&
test_cmp expected actual &&
git read-tree --prefix=z/ master &&
git ls-files -s >actual &&
(
echo "100644 $o1 0 M/a" &&
echo "100644 $o0 0 M/b" &&
echo "100644 $o0 0 M/c" &&
echo "100644 $o1 0 M/d/e" &&
echo "100644 $o1 0 a" &&
echo "100644 $o1 0 a1/a" &&
echo "100644 $o0 0 a1/b" &&
echo "100644 $o0 0 a1/c" &&
echo "100644 $o1 0 a1/d/e" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o1 0 d/e" &&
echo "100644 $o1 0 z/a" &&
echo "100644 $o0 0 z/b" &&
echo "100644 $o0 0 z/c" &&
echo "100644 $o1 0 z/d/e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'merge-recursive w/ empty work tree - ours has rename' '
(
GIT_WORK_TREE="$PWD/ours-has-rename-work" &&
export GIT_WORK_TREE &&
GIT_INDEX_FILE="$PWD/ours-has-rename-index" &&
export GIT_INDEX_FILE &&
mkdir "$GIT_WORK_TREE" &&
git read-tree -i -m $c7 2>actual-err &&
test_must_be_empty actual-err &&
git update-index --ignore-missing --refresh 2>actual-err &&
test_must_be_empty actual-err &&
git merge-recursive $c0 -- $c7 $c3 2>actual-err &&
test_must_be_empty actual-err &&
git ls-files -s >actual-files 2>actual-err &&
test_must_be_empty actual-err
) &&
cat >expected-files <<-EOF &&
100644 $o3 0 b/c
100644 $o0 0 c
100644 $o0 0 d/e
100644 $o0 0 e
EOF
test_cmp expected-files actual-files
'
test_expect_success 'merge-recursive w/ empty work tree - theirs has rename' '
(
GIT_WORK_TREE="$PWD/theirs-has-rename-work" &&
export GIT_WORK_TREE &&
GIT_INDEX_FILE="$PWD/theirs-has-rename-index" &&
export GIT_INDEX_FILE &&
mkdir "$GIT_WORK_TREE" &&
git read-tree -i -m $c3 2>actual-err &&
test_must_be_empty actual-err &&
git update-index --ignore-missing --refresh 2>actual-err &&
test_must_be_empty actual-err &&
git merge-recursive $c0 -- $c3 $c7 2>actual-err &&
test_must_be_empty actual-err &&
git ls-files -s >actual-files 2>actual-err &&
test_must_be_empty actual-err
) &&
cat >expected-files <<-EOF &&
100644 $o3 0 b/c
100644 $o0 0 c
100644 $o0 0 d/e
100644 $o0 0 e
EOF
test_cmp expected-files actual-files
'
test_expect_success 'merge removes empty directories' '
git reset --hard master &&
git checkout -b rm &&
git rm d/e &&
git commit -mremoved-d/e &&
git checkout master &&
git merge -s recursive rm &&
test_path_is_missing d
'
test_expect_success 'merge-recursive simple w/submodule' '
git checkout submod &&
git merge remove
'
test_expect_success 'merge-recursive simple w/submodule result' '
git ls-files -s >actual &&
(
echo "100644 $o5 0 a" &&
echo "100644 $o0 0 c" &&
echo "160000 $c1 0 d"
) >expected &&
test_cmp expected actual
'
test_expect_success 'merge-recursive copy vs. rename' '
git checkout -f copy &&
git merge rename &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 blob $o0 e" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e" &&
echo "100644 $o0 0 e"
) >expected &&
test_cmp expected actual
'
test_expect_merge_algorithm failure success 'merge-recursive rename vs. rename/symlink' '
git checkout -f rename &&
git merge rename-ln &&
( git ls-tree -r HEAD && git ls-files -s ) >actual &&
(
echo "120000 blob $oln a" &&
echo "100644 blob $o0 b" &&
echo "100644 blob $o0 c" &&
echo "100644 blob $o0 d/e" &&
echo "100644 blob $o0 e" &&
echo "120000 $oln 0 a" &&
echo "100644 $o0 0 b" &&
echo "100644 $o0 0 c" &&
echo "100644 $o0 0 d/e" &&
echo "100644 $o0 0 e"
) >expected &&
test_cmp expected actual
'
test_expect_success 'merging with triple rename across D/F conflict' '
git reset --hard HEAD &&
git checkout -b topic &&
git rm -rf . &&
echo "just a file" >sub1 &&
mkdir -p sub2 &&
echo content1 >sub2/file1 &&
echo content2 >sub2/file2 &&
echo content3 >sub2/file3 &&
mkdir simple &&
echo base >simple/bar &&
git add -A &&
test_tick &&
git commit -m base &&
git checkout -b other &&
echo more >>simple/bar &&
test_tick &&
git commit -a -m changesimplefile &&
git checkout topic &&
git rm sub1 &&
git mv sub2 sub1 &&
test_tick &&
git commit -m changefiletodir &&
test_tick &&
git merge other
'
test_expect_success 'merge-recursive remembers the names of all base trees' '
git reset --hard HEAD &&
# make the index match $c1 so that merge-recursive below does not
# fail early
git diff --binary HEAD $c1 -- | git apply --cached &&
# more trees than static slots used by oid_to_hex()
for commit in $c0 $c2 $c4 $c5 $c6 $c7
do
git rev-parse "$commit^{tree}"
done >trees &&
# ignore the return code; it only fails because the input is weird...
test_must_fail git -c merge.verbosity=5 merge-recursive $(cat trees) -- $c1 $c3 >out &&
# ...but make sure it fails in the expected way
test_i18ngrep CONFLICT.*rename/rename out &&
# merge-recursive prints in reverse order, but we do not care
sort <trees >expect &&
sed -n "s/^virtual //p" out | sort >actual &&
test_cmp expect actual
'
test_expect_success 'merge-recursive internal merge resolves to the sameness' '
git reset --hard HEAD &&
# We are going to create a history leading to two criss-cross
# branches A and B. The common ancestor at the bottom, O0,
# has two child commits O1 and O2, both of which will be merge
# base between A and B, like so:
#
# O1---A
# / \ /
# O0 .
# \ / \
# O2---B
#
# The recently added "check to see if the index is different from
# the tree into which something else is getting merged" check must
# NOT kick in when an inner merge between O1 and O2 is made. Both
# O1 and O2 happen to have the same tree as O0 in this test to
# trigger the bug---whether the inner merge is made by merging O2
# into O1 or O1 into O2, their common ancestor O0 and the branch
# being merged have the same tree. We should not trigger the "is
# the index dirty?" check in this case.
echo "zero" >file &&
git add file &&
test_tick &&
git commit -m "O0" &&
O0=$(git rev-parse HEAD) &&
test_tick &&
git commit --allow-empty -m "O1" &&
O1=$(git rev-parse HEAD) &&
git reset --hard $O0 &&
test_tick &&
git commit --allow-empty -m "O2" &&
O2=$(git rev-parse HEAD) &&
test_tick &&
git merge -s ours $O1 &&
B=$(git rev-parse HEAD) &&
git reset --hard $O1 &&
test_tick &&
git merge -s ours $O2 &&
A=$(git rev-parse HEAD) &&
git merge $B
'
test_done
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