[thirdparty/git.git] / contrib / examples / git-resolve.sh

#!/bin/sh
#
# Copyright (c) 2005 Linus Torvalds
#
# Resolve two trees.
#

echo 'WARNING: This command is DEPRECATED and will be removed very soon.' >&2
echo 'WARNING: Please use git-merge or git-pull instead.' >&2
sleep 2

USAGE='<head> <remote> <merge-message>'
. git-sh-setup

dropheads() {
	rm -f -- "$GIT_DIR/MERGE_HEAD" \
		"$GIT_DIR/LAST_MERGE" || exit 1
}

head=$(git rev-parse --verify "$1"^0) &&
merge=$(git rev-parse --verify "$2"^0) &&
merge_name="$2" &&
merge_msg="$3" || usage

#
# The remote name is just used for the message,
# but we do want it.
#
if [ -z "$head" -o -z "$merge" -o -z "$merge_msg" ]; then
	usage
fi

dropheads
echo $head > "$GIT_DIR"/ORIG_HEAD
echo $merge > "$GIT_DIR"/LAST_MERGE

common=$(git merge-base $head $merge)
if [ -z "$common" ]; then
	die "Unable to find common commit between" $merge $head
fi

case "$common" in
"$merge")
	echo "Already up to date. Yeeah!"
	dropheads
	exit 0
	;;
"$head")
	echo "Updating $(git rev-parse --short $head)..$(git rev-parse --short $merge)"
	git read-tree -u -m $head $merge || exit 1
	git update-ref -m "resolve $merge_name: Fast-forward" \
		HEAD "$merge" "$head"
	git diff-tree -p $head $merge | git apply --stat
	dropheads
	exit 0
	;;
esac

# We are going to make a new commit.
git var GIT_COMMITTER_IDENT >/dev/null || exit

# Find an optimum merge base if there are more than one candidates.
LF='
'
common=$(git merge-base -a $head $merge)
case "$common" in
?*"$LF"?*)
	echo "Trying to find the optimum merge base."
	G=.tmp-index$$
	best=
	best_cnt=-1
	for c in $common
	do
		rm -f $G
		GIT_INDEX_FILE=$G git read-tree -m $c $head $merge \
			2>/dev/null || continue
		# Count the paths that are unmerged.
		cnt=$(GIT_INDEX_FILE=$G git ls-files --unmerged | wc -l)
		if test $best_cnt -le 0 || test $cnt -le $best_cnt
		then
			best=$c
			best_cnt=$cnt
			if test "$best_cnt" -eq 0
			then
				# Cannot do any better than all trivial merge.
				break
			fi
		fi
	done
	rm -f $G
	common="$best"
esac

echo "Trying to merge $merge into $head using $common."
git update-index --refresh 2>/dev/null
git read-tree -u -m $common $head $merge || exit 1
result_tree=$(git write-tree  2> /dev/null)
if [ $? -ne 0 ]; then
	echo "Simple merge failed, trying Automatic merge"
	git-merge-index -o git-merge-one-file -a
	if [ $? -ne 0 ]; then
		echo $merge > "$GIT_DIR"/MERGE_HEAD
		die "Automatic merge failed, fix up by hand"
	fi
	result_tree=$(git write-tree) || exit 1
fi
result_commit=$(echo "$merge_msg" | git commit-tree $result_tree -p $head -p $merge)
echo "Committed merge $result_commit"
git update-ref -m "resolve $merge_name: In-index merge" \
	HEAD "$result_commit" "$head"
git diff-tree -p $head $result_commit | git apply --stat
dropheads
Commit	Line	Data
67cc5c4e LT	1	#!/bin/sh
67cc5c4e LT	2	#
8ac069ac JH	3	# Copyright (c) 2005 Linus Torvalds
8ac069ac JH	4	#
67cc5c4e LT	5	# Resolve two trees.
67cc5c4e LT	6	#
b33e9666	7
8f41db8c PB	8	echo 'WARNING: This command is DEPRECATED and will be removed very soon.' >&2
	9	echo 'WARNING: Please use git-merge or git-pull instead.' >&2
	10	sleep 2
	11
806f36d4 FK	12	USAGE='<head> <remote> <merge-message>'
806f36d4 FK	13	. git-sh-setup
67cc5c4e	14
c591412c	15	dropheads() {
6b38a402	16	rm -f -- "$GIT_DIR/MERGE_HEAD" \
c591412c DH	17	"$GIT_DIR/LAST_MERGE" \|\| exit 1
c591412c DH	18	}
67cc5c4e	19
5be60078 JH	20	head=$(git rev-parse --verify "$1"^0) &&
5be60078 JH	21	merge=$(git rev-parse --verify "$2"^0) &&
5a6852fe	22	merge_name="$2" &&
165e160e JH	23	merge_msg="$3" \|\| usage
165e160e JH	24
67cc5c4e LT	25	#
	26	# The remote name is just used for the message,
	27	# but we do want it.
	28	#
3ba513c3	29	if [ -z "$head" -o -z "$merge" -o -z "$merge_msg" ]; then
165e160e	30	usage
67cc5c4e LT	31	fi
67cc5c4e LT	32
c591412c DH	33	dropheads
	34	echo $head > "$GIT_DIR"/ORIG_HEAD
	35	echo $merge > "$GIT_DIR"/LAST_MERGE
	36
5be60078	37	common=$(git merge-base $head $merge)
67cc5c4e	38	if [ -z "$common" ]; then
b33e9666	39	die "Unable to find common commit between" $merge $head
67cc5c4e LT	40	fi
67cc5c4e LT	41
86b13da4 JH	42	case "$common" in
86b13da4 JH	43	"$merge")
7560f547	44	echo "Already up to date. Yeeah!"
c591412c	45	dropheads
67cc5c4e	46	exit 0
86b13da4 JH	47	;;
86b13da4 JH	48	"$head")
5be60078 JH	49	echo "Updating $(git rev-parse --short $head)..$(git rev-parse --short $merge)"
5be60078 JH	50	git read-tree -u -m $head $merge \|\| exit 1
a75d7b54	51	git update-ref -m "resolve $merge_name: Fast-forward" \
5a6852fe	52	HEAD "$merge" "$head"
5be60078	53	git diff-tree -p $head $merge \| git apply --stat
c591412c	54	dropheads
67cc5c4e	55	exit 0
86b13da4 JH	56	;;
86b13da4 JH	57	esac
9585e406	58
e3b59a44 JH	59	# We are going to make a new commit.
	60	git var GIT_COMMITTER_IDENT >/dev/null \|\| exit
	61
9585e406 JH	62	# Find an optimum merge base if there are more than one candidates.
	63	LF='
	64	'
5be60078	65	common=$(git merge-base -a $head $merge)
9585e406 JH	66	case "$common" in
	67	?"$LF"?)
	68	echo "Trying to find the optimum merge base."
	69	G=.tmp-index$$
	70	best=
	71	best_cnt=-1
	72	for c in $common
	73	do
	74	rm -f $G
5be60078	75	GIT_INDEX_FILE=$G git read-tree -m $c $head $merge \
9585e406 JH	76	2>/dev/null \|\| continue
9585e406 JH	77	# Count the paths that are unmerged.
6aeb30eb	78	cnt=$(GIT_INDEX_FILE=$G git ls-files --unmerged \| wc -l)
6f34b79d	79	if test $best_cnt -le 0 \|\| test $cnt -le $best_cnt
9585e406 JH	80	then
	81	best=$c
	82	best_cnt=$cnt
	83	if test "$best_cnt" -eq 0
	84	then
	85	# Cannot do any better than all trivial merge.
	86	break
	87	fi
	88	fi
	89	done
	90	rm -f $G
	91	common="$best"
	92	esac
	93
	94	echo "Trying to merge $merge into $head using $common."
5be60078 JH	95	git update-index --refresh 2>/dev/null
	96	git read-tree -u -m $common $head $merge \|\| exit 1
	97	result_tree=$(git write-tree 2> /dev/null)
67cc5c4e LT	98	if [ $? -ne 0 ]; then
67cc5c4e LT	99	echo "Simple merge failed, trying Automatic merge"
215a7ad1	100	git-merge-index -o git-merge-one-file -a
e5b905c4	101	if [ $? -ne 0 ]; then
c591412c	102	echo $merge > "$GIT_DIR"/MERGE_HEAD
b33e9666	103	die "Automatic merge failed, fix up by hand"
e5b905c4	104	fi
5be60078	105	result_tree=$(git write-tree) \|\| exit 1
67cc5c4e	106	fi
5be60078	107	result_commit=$(echo "$merge_msg" \| git commit-tree $result_tree -p $head -p $merge)
67cc5c4e	108	echo "Committed merge $result_commit"
5be60078	109	git update-ref -m "resolve $merge_name: In-index merge" \
5a6852fe	110	HEAD "$result_commit" "$head"
5be60078	111	git diff-tree -p $head $result_commit \| git apply --stat
c591412c	112	dropheads