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If merging two lines of development involves a rename/add conflict, and two different people make such a merge but resolve it differently, and then someone tries to merge the resulting two merges, then they should clearly get a conflict due to the different resolutions from the previous developers. However, in some such cases the conflict would not be detected and git would silently accept one of the two versions being merged as the final merge resolution. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
234 lines
5.3 KiB
Bash
Executable file
234 lines
5.3 KiB
Bash
Executable file
#!/bin/sh
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test_description='recursive merge corner cases'
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. ./test-lib.sh
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#
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# L1 L2
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# o---o
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# / \ / \
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# o X ?
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# \ / \ /
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# o---o
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# R1 R2
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#
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test_expect_success 'setup basic criss-cross + rename with no modifications' '
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ten="0 1 2 3 4 5 6 7 8 9"
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for i in $ten
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do
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echo line $i in a sample file
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done >one &&
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for i in $ten
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do
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echo line $i in another sample file
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done >two &&
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git add one two &&
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test_tick && git commit -m initial &&
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git branch L1 &&
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git checkout -b R1 &&
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git mv one three &&
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test_tick && git commit -m R1 &&
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git checkout L1 &&
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git mv two three &&
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test_tick && git commit -m L1 &&
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git checkout L1^0 &&
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test_tick && git merge -s ours R1 &&
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git tag L2 &&
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git checkout R1^0 &&
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test_tick && git merge -s ours L1 &&
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git tag R2
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'
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test_expect_success 'merge simple rename+criss-cross with no modifications' '
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git reset --hard &&
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git checkout L2^0 &&
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test_must_fail git merge -s recursive R2^0 &&
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test 5 = $(git ls-files -s | wc -l) &&
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test 3 = $(git ls-files -u | wc -l) &&
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test 0 = $(git ls-files -o | wc -l) &&
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test $(git rev-parse :0:one) = $(git rev-parse L2:one) &&
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test $(git rev-parse :0:two) = $(git rev-parse R2:two) &&
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test $(git rev-parse :2:three) = $(git rev-parse L2:three) &&
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test $(git rev-parse :3:three) = $(git rev-parse R2:three) &&
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cp two merged &&
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>empty &&
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test_must_fail git merge-file \
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-L "Temporary merge branch 2" \
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-L "" \
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-L "Temporary merge branch 1" \
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merged empty one &&
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test $(git rev-parse :1:three) = $(git hash-object merged)
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'
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#
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# Same as before, but modify L1 slightly:
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#
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# L1m L2
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# o---o
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# / \ / \
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# o X ?
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# \ / \ /
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# o---o
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# R1 R2
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#
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test_expect_success 'setup criss-cross + rename merges with basic modification' '
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git rm -rf . &&
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git clean -fdqx &&
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rm -rf .git &&
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git init &&
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ten="0 1 2 3 4 5 6 7 8 9"
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for i in $ten
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do
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echo line $i in a sample file
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done >one &&
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for i in $ten
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do
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echo line $i in another sample file
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done >two &&
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git add one two &&
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test_tick && git commit -m initial &&
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git branch L1 &&
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git checkout -b R1 &&
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git mv one three &&
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echo more >>two &&
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git add two &&
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test_tick && git commit -m R1 &&
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git checkout L1 &&
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git mv two three &&
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test_tick && git commit -m L1 &&
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git checkout L1^0 &&
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test_tick && git merge -s ours R1 &&
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git tag L2 &&
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git checkout R1^0 &&
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test_tick && git merge -s ours L1 &&
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git tag R2
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'
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test_expect_failure 'merge criss-cross + rename merges with basic modification' '
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git reset --hard &&
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git checkout L2^0 &&
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test_must_fail git merge -s recursive R2^0 &&
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test 5 = $(git ls-files -s | wc -l) &&
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test 3 = $(git ls-files -u | wc -l) &&
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test 0 = $(git ls-files -o | wc -l) &&
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test $(git rev-parse :0:one) = $(git rev-parse L2:one) &&
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test $(git rev-parse :0:two) = $(git rev-parse R2:two) &&
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test $(git rev-parse :2:three) = $(git rev-parse L2:three) &&
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test $(git rev-parse :3:three) = $(git rev-parse R2:three) &&
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head -n 10 two >merged &&
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cp one merge-me &&
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>empty &&
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test_must_fail git merge-file \
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-L "Temporary merge branch 2" \
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-L "" \
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-L "Temporary merge branch 1" \
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merged empty merge-me &&
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test $(git rev-parse :1:three) = $(git hash-object merged)
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'
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#
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# For the next test, we start with three commits in two lines of development
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# which setup a rename/add conflict:
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# Commit A: File 'a' exists
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# Commit B: Rename 'a' -> 'new_a'
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# Commit C: Modify 'a', create different 'new_a'
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# Later, two different people merge and resolve differently:
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# Commit D: Merge B & C, ignoring separately created 'new_a'
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# Commit E: Merge B & C making use of some piece of secondary 'new_a'
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# Finally, someone goes to merge D & E. Does git detect the conflict?
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#
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# B D
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# o---o
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# / \ / \
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# A o X ? F
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# \ / \ /
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# o---o
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# C E
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#
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test_expect_success 'setup differently handled merges of rename/add conflict' '
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git rm -rf . &&
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git clean -fdqx &&
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rm -rf .git &&
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git init &&
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printf "0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n" >a &&
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git add a &&
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test_tick && git commit -m A &&
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git branch B &&
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git checkout -b C &&
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echo 10 >>a &&
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echo "other content" >>new_a &&
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git add a new_a &&
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test_tick && git commit -m C &&
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git checkout B &&
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git mv a new_a &&
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test_tick && git commit -m B &&
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git checkout B^0 &&
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test_must_fail git merge C &&
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git clean -f &&
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test_tick && git commit -m D &&
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git tag D &&
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git checkout C^0 &&
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test_must_fail git merge B &&
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rm new_a~HEAD new_a &&
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printf "Incorrectly merged content" >>new_a &&
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git add -u &&
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test_tick && git commit -m E &&
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git tag E
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'
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test_expect_failure 'git detects differently handled merges conflict' '
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git reset --hard &&
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git checkout D^0 &&
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git merge -s recursive E^0 && {
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echo "BAD: should have conflicted"
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test "Incorrectly merged content" = "$(cat new_a)" &&
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echo "BAD: Silently accepted wrong content"
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return 1
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}
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test 3 = $(git ls-files -s | wc -l) &&
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test 3 = $(git ls-files -u | wc -l) &&
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test 0 = $(git ls-files -o | wc -l) &&
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test $(git rev-parse :2:new_a) = $(git rev-parse D:new_a) &&
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test $(git rev-parse :3:new_a) = $(git rev-parse E:new_a) &&
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git cat-file -p B:new_a >>merged &&
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git cat-file -p C:new_a >>merge-me &&
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>empty &&
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test_must_fail git merge-file \
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-L "Temporary merge branch 2" \
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-L "" \
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-L "Temporary merge branch 1" \
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merged empty merge-me &&
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test $(git rev-parse :1:new_a) = $(git hash-object merged)
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'
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test_done
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