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rebase -i: handle fixup of root commit correctly

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There is a bug with git rebase -i --root when a fixup or squash line is
applied to the new root. We attempt to amend the commit onto which they
apply with git reset --soft HEAD^ followed by a normal commit. Unlike a
real commit --amend, this sequence will fail against a root commit as it
has no parent.

Fix rebase -i to use commit --amend for fixup and squash instead, and
add a test for the case of a fixup of the root commit.

Signed-off-by: Chris Webb <chris@arachsys.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Chris Webb 2012-07-24 13:17:03 +01:00 committed by Junio C Hamano
parent 994fd91d1f
commit 2147f844ed
2 changed files with 21 additions and 12 deletions
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25
git-rebase--interactive.sh
View file

@ -495,25 +495,28 @@ do_next () {
author_script_content=$(get_author_ident_from_commit HEAD)
echo "$author_script_content" > "$author_script"
eval "$author_script_content"
output git reset --soft HEAD^
pick_one -n $sha1 || die_failed_squash $sha1 "$rest"
if ! pick_one -n $sha1
then
git rev-parse --verify HEAD >"$amend"
die_failed_squash $sha1 "$rest"
fi
case "$(peek_next_command)" in
squash|s|fixup|f)
# This is an intermediate commit; its message will only be
# used in case of trouble. So use the long version:
do_with_author output git commit --no-verify -F "$squash_msg" ||
do_with_author output git commit --amend --no-verify -F "$squash_msg" ||
die_failed_squash $sha1 "$rest"
;;
*)
# This is the final command of this squash/fixup group
if test -f "$fixup_msg"
then
do_with_author git commit --no-verify -F "$fixup_msg" ||
do_with_author git commit --amend --no-verify -F "$fixup_msg" ||
die_failed_squash $sha1 "$rest"
else
cp "$squash_msg" "$GIT_DIR"/SQUASH_MSG || exit
rm -f "$GIT_DIR"/MERGE_MSG
do_with_author git commit --no-verify -e ||
do_with_author git commit --amend --no-verify -F "$GIT_DIR"/SQUASH_MSG -e ||
die_failed_squash $sha1 "$rest"
fi
rm -f "$squash_msg" "$fixup_msg"
@ -729,7 +732,6 @@ In both case, once you're done, continue with:
fi
. "$author_script" ||
die "Error trying to find the author identity to amend commit"
current_head=
if test -f "$amend"
then
current_head=$(git rev-parse --verify HEAD)
@ -737,13 +739,12 @@ In both case, once you're done, continue with:
die "\
You have uncommitted changes in your working tree. Please, commit them
first and then run 'git rebase --continue' again."
git reset --soft HEAD^ ||
die "Cannot rewind the HEAD"
do_with_author git commit --amend --no-verify -F "$msg" -e ||
die "Could not commit staged changes."
else
do_with_author git commit --no-verify -F "$msg" -e ||
die "Could not commit staged changes."
fi
do_with_author git commit --no-verify -F "$msg" -e || {
test -n "$current_head" && git reset --soft $current_head
die "Could not commit staged changes."
}
fi
record_in_rewritten "$(cat "$state_dir"/stopped-sha)"

8
t/t3404-rebase-interactive.sh
View file

@ -786,4 +786,12 @@ test_expect_success 'rebase -i --root temporary sentinel commit' '
git rebase --abort
'
test_expect_success 'rebase -i --root fixup root commit' '
git checkout B &&
FAKE_LINES="1 fixup 2" git rebase -i --root &&
test A = $(git cat-file commit HEAD | sed -ne \$p) &&
test B = $(git show HEAD:file1) &&
test 0 = $(git cat-file commit HEAD | grep -c ^parent\ )
'
test_done