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git/git-reset.sh
Junio C Hamano 49ed2bc466 git-reset to remove "$GIT_DIR/MERGE_MSG"
An earlier commit a9cb3c6e changed git-commit to use the
contents of MERGE_MSG even when we do not have MERGE_HEAD (the
rationale is in its log message).

However, the change tricks the following sequence to include a
merge message in a completely unrelated commit:

	$ git pull somewhere
	: oops, the conflicts are too much.  forget it.
        $ git reset --hard
        : work work work
        $ git commit

To fix this confusion, this patch makes "git reset" to remove
the leftover MERGE_MSG that was prepared when the user abandoned
the merge.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Acked-by: Luben Tuikov <ltuikov@yahoo.com
2006-12-06 10:47:14 -08:00

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#!/bin/sh
USAGE='[--mixed | --soft | --hard] [<commit-ish>]'
. git-sh-setup
update=
reset_type=--mixed
case "$1" in
--mixed | --soft | --hard)
reset_type="$1"
shift
;;
-*)
usage ;;
esac
case $# in
0) rev=HEAD ;;
1) rev=$(git-rev-parse --verify "$1") || exit ;;
*) usage ;;
esac
rev=$(git-rev-parse --verify $rev^0) || exit
# We need to remember the set of paths that _could_ be left
# behind before a hard reset, so that we can remove them.
if test "$reset_type" = "--hard"
then
update=-u
fi
# Soft reset does not touch the index file nor the working tree
# at all, but requires them in a good order. Other resets reset
# the index file to the tree object we are switching to.
if test "$reset_type" = "--soft"
then
if test -f "$GIT_DIR/MERGE_HEAD" ||
test "" != "$(git-ls-files --unmerged)"
then
die "Cannot do a soft reset in the middle of a merge."
fi
else
git-read-tree --reset $update "$rev" || exit
fi
# Any resets update HEAD to the head being switched to.
if orig=$(git-rev-parse --verify HEAD 2>/dev/null)
then
echo "$orig" >"$GIT_DIR/ORIG_HEAD"
else
rm -f "$GIT_DIR/ORIG_HEAD"
fi
git-update-ref -m "reset $reset_type $*" HEAD "$rev"
update_ref_status=$?
case "$reset_type" in
--hard )
;; # Nothing else to do
--soft )
;; # Nothing else to do
--mixed )
# Report what has not been updated.
git-update-index --refresh
;;
esac
rm -f "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/rr-cache/MERGE_RR" \
"$GIT_DIR/SQUASH_MSG" "$GIT_DIR/MERGE_MSG"
exit $update_ref_status