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am --abort: support aborting to unborn branch

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When git-am is first run on an unborn branch, no ORIG_HEAD is created.
As such, any applied commits will remain even after a git am --abort.

To be consistent with the behavior of git am --abort when it is not run
from an unborn branch, we empty the index, and then destroy the branch
pointed to by HEAD if there is no ORIG_HEAD.

Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Paul Tan 2015-06-06 19:46:11 +08:00 committed by Junio C Hamano
parent 20c3fe7621
commit e06764c8eb
2 changed files with 25 additions and 1 deletions
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9
git-am.sh
View file

@ -514,7 +514,14 @@ then
index_tree=$(git write-tree) &&
orig_head=$(git rev-parse --verify -q ORIG_HEAD || echo $empty_tree) &&
git read-tree -m -u $index_tree $orig_head
git reset ORIG_HEAD
if git rev-parse --verify -q ORIG_HEAD >/dev/null 2>&1
then
git reset ORIG_HEAD
else
git read-tree $empty_tree
curr_branch=$(git symbolic-ref HEAD 2>/dev/null) &&
git update-ref -d $curr_branch
fi
fi
rm -fr "$dotest"
exit ;;

17
t/t4151-am-abort.sh
View file

@ -14,6 +14,7 @@ test_expect_success setup '
git add file-1 file-2 &&
git commit -m initial &&
git tag initial &&
git format-patch --stdout --root initial >initial.patch &&
for i in 2 3 4 5 6
do
echo $i >>file-1 &&
@ -125,4 +126,20 @@ test_expect_success 'am -3 --abort removes otherfile-4 on unborn branch' '
test_path_is_missing otherfile-4
'
test_expect_success 'am -3 --abort on unborn branch removes applied commits' '
git checkout -f --orphan orphan &&
git reset &&
rm -f otherfile-4 otherfile-2 file-1 file-2 &&
test_must_fail git am -3 initial.patch 0003-*.patch &&
test 3 -eq $(git ls-files -u | wc -l) &&
test 4 = "$(cat otherfile-4)" &&
git am --abort &&
test -z "$(git ls-files -u)" &&
test_path_is_missing otherfile-4 &&
test_path_is_missing file-1 &&
test_path_is_missing file-2 &&
test 0 -eq $(git log --oneline 2>/dev/null | wc -l) &&
test refs/heads/orphan = "$(git symbolic-ref HEAD)"
'
test_done