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merge-recursive.c is built on the idea of running unpack_trees() and then "doing minor touch-ups" to get the result. Unfortunately, unpack_trees() was run in an update-as-it-goes mode, leading merge-recursive.c to follow suit and end up with an immediate evaluation and fix-it-up-as-you-go design. Some things like directory/file conflicts are not well representable in the index data structure, and required special extra code to handle. But then when it was discovered that rename/delete conflicts could also be involved in directory/file conflicts, the special directory/file conflict handling code had to be copied to the rename/delete codepath. ...and then it had to be copied for modify/delete, and for rename/rename(1to2) conflicts, ...and yet it still missed some. Further, when it was discovered that there were also file/submodule conflicts and submodule/directory conflicts, we needed to copy the special submodule handling code to all the special cases throughout the codebase. And then it was discovered that our handling of directory/file conflicts was suboptimal because it would create untracked files to store the contents of the conflicting file, which would not be cleaned up if someone were to run a 'git merge --abort' or 'git rebase --abort'. It was also difficult or scary to try to add or remove the index entries corresponding to these files given the directory/file conflict in the index. But changing merge-recursive.c to handle these correctly was a royal pain because there were so many sites in the code with similar but not identical code for handling directory/file/submodule conflicts that would all need to be updated. I have worked hard to push all directory/file/submodule conflict handling in merge-ort through a single codepath, and avoid creating untracked files for storing tracked content (it does record things at alternate paths, but makes sure they have higher-order stages in the index). Since updating merge-recursive is too much work and we don't want to destabilize it, instead update the testsuite to have different expectations for relevant directory/file/submodule conflict tests. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
161 lines
3.5 KiB
Bash
Executable File
161 lines
3.5 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2005 Fredrik Kuivinen
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#
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test_description='Test merge with directory/file conflicts'
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. ./test-lib.sh
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test_expect_success 'prepare repository' '
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echo Hello >init &&
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git add init &&
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git commit -m initial &&
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git branch B &&
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mkdir dir &&
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echo foo >dir/foo &&
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git add dir/foo &&
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git commit -m "File: dir/foo" &&
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git checkout B &&
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echo file dir >dir &&
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git add dir &&
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git commit -m "File: dir"
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'
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test_expect_success 'Merge with d/f conflicts' '
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test_expect_code 1 git merge -m "merge msg" master
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'
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test_expect_success 'F/D conflict' '
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git reset --hard &&
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git checkout master &&
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rm .git/index &&
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mkdir before &&
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echo FILE >before/one &&
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echo FILE >after &&
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git add . &&
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git commit -m first &&
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rm -f after &&
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git mv before after &&
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git commit -m move &&
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git checkout -b para HEAD^ &&
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echo COMPLETELY ANOTHER FILE >another &&
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git add . &&
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git commit -m para &&
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git merge master
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'
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test_expect_success 'setup modify/delete + directory/file conflict' '
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git checkout --orphan modify &&
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git rm -rf . &&
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git clean -fdqx &&
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printf "a\nb\nc\nd\ne\nf\ng\nh\n" >letters &&
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git add letters &&
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git commit -m initial &&
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# Throw in letters.txt for sorting order fun
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# ("letters.txt" sorts between "letters" and "letters/file")
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echo i >>letters &&
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echo "version 2" >letters.txt &&
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git add letters letters.txt &&
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git commit -m modified &&
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git checkout -b delete HEAD^ &&
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git rm letters &&
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mkdir letters &&
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>letters/file &&
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echo "version 1" >letters.txt &&
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git add letters letters.txt &&
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git commit -m deleted
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'
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test_expect_success 'modify/delete + directory/file conflict' '
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git checkout delete^0 &&
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test_must_fail git merge modify &&
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test 5 -eq $(git ls-files -s | wc -l) &&
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test 4 -eq $(git ls-files -u | wc -l) &&
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if test "$GIT_TEST_MERGE_ALGORITHM" = ort
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then
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test 0 -eq $(git ls-files -o | wc -l)
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else
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test 1 -eq $(git ls-files -o | wc -l)
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fi &&
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test_path_is_file letters/file &&
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test_path_is_file letters.txt &&
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test_path_is_file letters~modify
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'
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test_expect_success 'modify/delete + directory/file conflict; other way' '
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git reset --hard &&
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git clean -f &&
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git checkout modify^0 &&
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test_must_fail git merge delete &&
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test 5 -eq $(git ls-files -s | wc -l) &&
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test 4 -eq $(git ls-files -u | wc -l) &&
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if test "$GIT_TEST_MERGE_ALGORITHM" = ort
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then
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test 0 -eq $(git ls-files -o | wc -l)
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else
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test 1 -eq $(git ls-files -o | wc -l)
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fi &&
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test_path_is_file letters/file &&
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test_path_is_file letters.txt &&
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test_path_is_file letters~HEAD
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'
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test_expect_success 'Simple merge in repo with interesting pathnames' '
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# Simple lexicographic ordering of files and directories would be:
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# foo
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# foo/bar
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# foo/bar-2
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# foo/bar/baz
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# foo/bar-2/baz
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# The fact that foo/bar-2 appears between foo/bar and foo/bar/baz
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# can trip up some codepaths, and is the point of this test.
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test_create_repo name-ordering &&
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(
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cd name-ordering &&
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mkdir -p foo/bar &&
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mkdir -p foo/bar-2 &&
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>foo/bar/baz &&
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>foo/bar-2/baz &&
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git add . &&
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git commit -m initial &&
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git branch topic &&
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git branch other &&
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git checkout other &&
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echo other >foo/bar-2/baz &&
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git add -u &&
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git commit -m other &&
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git checkout topic &&
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echo topic >foo/bar/baz &&
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git add -u &&
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git commit -m topic &&
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git merge other &&
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git ls-files -s >out &&
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test_line_count = 2 out &&
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git rev-parse :0:foo/bar/baz :0:foo/bar-2/baz >actual &&
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git rev-parse HEAD~1:foo/bar/baz other:foo/bar-2/baz >expect &&
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test_cmp expect actual
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)
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'
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test_done
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