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Phillip found out that 'git checkout -f <branch>' does not restore
conflict/unmerged files correctly. All tracked files should be taken
from <branch> and all non-zero stages removed. Most of this is true,
except that the final file could be in stage one instead of zero.
"checkout -f" (among other commands) does this with one-way merge, which
is supposed to take stat info from the index and everything else from
the given tree. The add_entry(.., old, ...) call in oneway_merge()
though will keep stage index from the index.
This is normally not a problem if the entry from the index is
normal (stage #0). But if there is a conflict, stage #0 does not exist
and we'll get stage #1 entry as "old" variable, which gets recorded in
the final index. Fix it by clearing stage mask.
This bug probably comes from b5b425074e (git-read-tree: make one-way
merge also honor the "update" flag, 2005-06-07). Before this commit, we
may create the final ("dst") index entry from the one in index, but we
do clear CE_STAGEMASK.
I briefly checked two- and three-way merge functions. I think we don't
have the same problem in those.
Reported-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
73 lines
1.9 KiB
Bash
Executable file
73 lines
1.9 KiB
Bash
Executable file
#!/bin/sh
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test_description='checkout -m -- <conflicted path>
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Ensures that checkout -m on a resolved file restores the conflicted file'
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. ./test-lib.sh
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test_expect_success setup '
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test_tick &&
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test_commit both.txt both.txt initial &&
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git branch topic &&
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test_commit modified_in_master both.txt in_master &&
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test_commit added_in_master each.txt in_master &&
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git checkout topic &&
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test_commit modified_in_topic both.txt in_topic &&
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test_commit added_in_topic each.txt in_topic
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'
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test_expect_success 'git merge master' '
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test_must_fail git merge master
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'
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clean_branchnames () {
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# Remove branch names after conflict lines
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sed 's/^\([<>]\{5,\}\) .*$/\1/'
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}
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test_expect_success '-m restores 2-way conflicted+resolved file' '
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cp each.txt each.txt.conflicted &&
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echo resolved >each.txt &&
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git add each.txt &&
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git checkout -m -- each.txt &&
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clean_branchnames <each.txt >each.txt.cleaned &&
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clean_branchnames <each.txt.conflicted >each.txt.conflicted.cleaned &&
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test_cmp each.txt.conflicted.cleaned each.txt.cleaned
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'
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test_expect_success '-m restores 3-way conflicted+resolved file' '
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cp both.txt both.txt.conflicted &&
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echo resolved >both.txt &&
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git add both.txt &&
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git checkout -m -- both.txt &&
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clean_branchnames <both.txt >both.txt.cleaned &&
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clean_branchnames <both.txt.conflicted >both.txt.conflicted.cleaned &&
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test_cmp both.txt.conflicted.cleaned both.txt.cleaned
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'
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test_expect_success 'force checkout a conflict file creates stage zero entry' '
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git init co-force &&
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(
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cd co-force &&
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echo a >a &&
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git add a &&
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git commit -ama &&
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A_OBJ=$(git rev-parse :a) &&
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git branch topic &&
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echo b >a &&
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git commit -amb &&
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B_OBJ=$(git rev-parse :a) &&
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git checkout topic &&
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echo c >a &&
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C_OBJ=$(git hash-object a) &&
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git checkout -m master &&
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test_cmp_rev :1:a $A_OBJ &&
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test_cmp_rev :2:a $B_OBJ &&
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test_cmp_rev :3:a $C_OBJ &&
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git checkout -f topic &&
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test_cmp_rev :0:a $A_OBJ
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)
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'
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test_done
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