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b9e31f5947
The loop that fills in the buffers that are later passed to the merge driver exits early when not all stages of a path are present in the index. But since the buffer pointers are not initialized in advance, the subsequent accesses are undefined. Initialize buffer pointers in advance to avoid undefined behavior later. That is not sufficient, though, to get correct operation of handle_cache(). The function replays a conflicted merge to extract the part inside the conflict markers. As written, the loop exits early when a stage is missing. Consequently, the buffers for later stages that would be present in the index are not filled in and the merge is replayed with incomplete data. Fix it by investigating all stages of the given path. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
196 lines
5.0 KiB
Bash
Executable File
196 lines
5.0 KiB
Bash
Executable File
#!/bin/sh
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test_description='undoing resolution'
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. ./test-lib.sh
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check_resolve_undo () {
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msg=$1
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shift
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while case $# in
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0) break ;;
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1|2|3) die "Bug in check-resolve-undo test" ;;
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esac
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do
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path=$1
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shift
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for stage in 1 2 3
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do
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sha1=$1
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shift
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case "$sha1" in
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'') continue ;;
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esac
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sha1=$(git rev-parse --verify "$sha1")
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printf "100644 %s %s\t%s\n" $sha1 $stage $path
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done
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done >"$msg.expect" &&
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git ls-files --resolve-undo >"$msg.actual" &&
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test_cmp "$msg.expect" "$msg.actual"
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}
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prime_resolve_undo () {
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git reset --hard &&
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git checkout second^0 &&
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test_tick &&
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test_must_fail git merge third^0 &&
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echo merge does not leave anything &&
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check_resolve_undo empty &&
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echo different >fi/le &&
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git add fi/le &&
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echo resolving records &&
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check_resolve_undo recorded fi/le initial:fi/le second:fi/le third:fi/le
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}
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test_expect_success setup '
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mkdir fi &&
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printf "a\0a" >binary &&
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git add binary &&
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test_commit initial fi/le first &&
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git branch side &&
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git branch another &&
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printf "a\0b" >binary &&
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git add binary &&
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test_commit second fi/le second &&
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git checkout side &&
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test_commit third fi/le third &&
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git branch add-add &&
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git checkout another &&
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test_commit fourth fi/le fourth &&
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git checkout add-add &&
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test_commit fifth add-differently &&
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git checkout master
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'
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test_expect_success 'add records switch clears' '
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prime_resolve_undo &&
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test_tick &&
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git commit -m merged &&
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echo committing keeps &&
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check_resolve_undo kept fi/le initial:fi/le second:fi/le third:fi/le &&
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git checkout second^0 &&
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echo switching clears &&
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check_resolve_undo cleared
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'
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test_expect_success 'rm records reset clears' '
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prime_resolve_undo &&
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test_tick &&
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git commit -m merged &&
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echo committing keeps &&
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check_resolve_undo kept fi/le initial:fi/le second:fi/le third:fi/le &&
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echo merge clears upfront &&
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test_must_fail git merge fourth^0 &&
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check_resolve_undo nuked &&
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git rm -f fi/le &&
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echo resolving records &&
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check_resolve_undo recorded fi/le initial:fi/le HEAD:fi/le fourth:fi/le &&
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git reset --hard &&
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echo resetting discards &&
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check_resolve_undo discarded
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'
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test_expect_success 'plumbing clears' '
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prime_resolve_undo &&
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test_tick &&
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git commit -m merged &&
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echo committing keeps &&
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check_resolve_undo kept fi/le initial:fi/le second:fi/le third:fi/le &&
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echo plumbing clear &&
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git update-index --clear-resolve-undo &&
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check_resolve_undo cleared
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'
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test_expect_success 'add records checkout -m undoes' '
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prime_resolve_undo &&
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git diff HEAD &&
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git checkout --conflict=merge fi/le &&
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echo checkout used the record and removed it &&
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check_resolve_undo removed &&
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echo the index and the work tree is unmerged again &&
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git diff >actual &&
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grep "^++<<<<<<<" actual
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'
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test_expect_success 'unmerge with plumbing' '
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prime_resolve_undo &&
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git update-index --unresolve fi/le &&
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git ls-files -u >actual &&
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test_line_count = 3 actual
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'
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test_expect_success 'rerere and rerere forget' '
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mkdir .git/rr-cache &&
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prime_resolve_undo &&
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echo record the resolution &&
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git rerere &&
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rerere_id=$(cd .git/rr-cache && echo */postimage) &&
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rerere_id=${rerere_id%/postimage} &&
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test -f .git/rr-cache/$rerere_id/postimage &&
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git checkout -m fi/le &&
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echo resurrect the conflict &&
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grep "^=======" fi/le &&
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echo reresolve the conflict &&
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git rerere &&
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test "z$(cat fi/le)" = zdifferent &&
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echo register the resolution again &&
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git add fi/le &&
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check_resolve_undo kept fi/le initial:fi/le second:fi/le third:fi/le &&
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test -z "$(git ls-files -u)" &&
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git rerere forget fi/le &&
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! test -f .git/rr-cache/$rerere_id/postimage &&
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tr "\0" "\n" <.git/MERGE_RR >actual &&
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echo "$rerere_id fi/le" >expect &&
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test_cmp expect actual
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'
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test_expect_success 'rerere and rerere forget (subdirectory)' '
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rm -fr .git/rr-cache &&
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mkdir .git/rr-cache &&
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prime_resolve_undo &&
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echo record the resolution &&
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(cd fi && git rerere) &&
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rerere_id=$(cd .git/rr-cache && echo */postimage) &&
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rerere_id=${rerere_id%/postimage} &&
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test -f .git/rr-cache/$rerere_id/postimage &&
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(cd fi && git checkout -m le) &&
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echo resurrect the conflict &&
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grep "^=======" fi/le &&
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echo reresolve the conflict &&
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(cd fi && git rerere) &&
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test "z$(cat fi/le)" = zdifferent &&
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echo register the resolution again &&
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(cd fi && git add le) &&
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check_resolve_undo kept fi/le initial:fi/le second:fi/le third:fi/le &&
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test -z "$(git ls-files -u)" &&
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(cd fi && git rerere forget le) &&
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! test -f .git/rr-cache/$rerere_id/postimage &&
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tr "\0" "\n" <.git/MERGE_RR >actual &&
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echo "$rerere_id fi/le" >expect &&
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test_cmp expect actual
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'
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test_expect_success 'rerere forget (binary)' '
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git checkout -f side &&
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printf "a\0c" >binary &&
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git commit -a -m binary &&
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test_must_fail git merge second &&
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git rerere forget binary
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'
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test_expect_success 'rerere forget (add-add conflict)' '
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git checkout -f master &&
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echo master >add-differently &&
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git add add-differently &&
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git commit -m "add differently" &&
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test_must_fail git merge fifth &&
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git rerere forget add-differently 2>actual &&
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test_i18ngrep "no remembered" actual
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'
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test_done
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