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author | Nguyễn Thái Ngọc Duy <pclouds@gmail.com> | 2019-03-18 18:38:22 +0700 |
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committer | Junio C Hamano <gitster@pobox.com> | 2019-03-21 12:06:28 +0900 |
commit | ab5af825db8beaf623f8ac95e4b4179ec1b9569e (patch) | |
tree | ddb45cb5e931b8936092c75a8b668077e5e0d565 /t/t2023-checkout-m.sh | |
parent | Merge git://ozlabs.org/~paulus/gitk (diff) | |
download | tgif-ab5af825db8beaf623f8ac95e4b4179ec1b9569e.tar.xz |
unpack-trees: fix oneway_merge accidentally carry over stage index
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>
Diffstat (limited to 't/t2023-checkout-m.sh')
-rwxr-xr-x | t/t2023-checkout-m.sh | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/t/t2023-checkout-m.sh b/t/t2023-checkout-m.sh index 7e18985134..fca3f85824 100755 --- a/t/t2023-checkout-m.sh +++ b/t/t2023-checkout-m.sh @@ -46,4 +46,28 @@ test_expect_success '-m restores 3-way conflicted+resolved file' ' test_cmp both.txt.conflicted.cleaned both.txt.cleaned ' +test_expect_success 'force checkout a conflict file creates stage zero entry' ' + git init co-force && + ( + cd co-force && + echo a >a && + git add a && + git commit -ama && + A_OBJ=$(git rev-parse :a) && + git branch topic && + echo b >a && + git commit -amb && + B_OBJ=$(git rev-parse :a) && + git checkout topic && + echo c >a && + C_OBJ=$(git hash-object a) && + git checkout -m master && + test_cmp_rev :1:a $A_OBJ && + test_cmp_rev :2:a $B_OBJ && + test_cmp_rev :3:a $C_OBJ && + git checkout -f topic && + test_cmp_rev :0:a $A_OBJ + ) +' + test_done |