[thirdparty/git.git] / git-rebase.sh

#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano.
#

USAGE='<upstream> [<head>]'
. git-sh-setup

case $# in 1|2) ;; *) usage ;; esac

# Make sure we do not have .dotest
if mkdir .dotest
then
	rmdir .dotest
else
	echo >&2 '
It seems that I cannot create a .dotest directory, and I wonder if you
are in the middle of patch application or another rebase.  If that is not
the case, please rm -fr .dotest and run me again.  I am stopping in case
you still have something valuable there.'
	exit 1
fi

# The tree must be really really clean.
git-update-index --refresh || exit
diff=$(git-diff-index --cached --name-status -r HEAD)
case "$diff" in
?*)	echo "$diff"
	exit 1
	;;
esac

# The other head is given.  Make sure it is valid.
other=$(git-rev-parse --verify "$1^0") || usage

# Make sure the branch to rebase is valid.
head=$(git-rev-parse --verify "${2-HEAD}^0") || exit

# If a hook exists, give it a chance to interrupt
if test -x "$GIT_DIR/hooks/pre-rebase"
then
	"$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || {
		echo >&2 "The pre-rebase hook refused to rebase."
		exit 1
	}
fi

# If the branch to rebase is given, first switch to it.
case "$#" in
2)
	git-checkout "$2" || usage
esac

mb=$(git-merge-base "$other" "$head")

# Check if we are already based on $other.
if test "$mb" = "$other"
then
	echo >&2 "Current branch `git-symbolic-ref HEAD` is up to date."
	exit 0
fi

# Rewind the head to "$other"
git-reset --hard "$other"

# If the $other is a proper descendant of the tip of the branch, then
# we just fast forwarded.
if test "$mb" = "$head"
then
	echo >&2 "Fast-forwarded $head to $other."
	exit 0
fi

git-format-patch -k --stdout --full-index "$other" ORIG_HEAD |
git am --binary -3 -k
Commit	Line	Data
59e6b23a JH	1	#!/bin/sh
	2	#
	3	# Copyright (c) 2005 Junio C Hamano.
	4	#
	5
3ae39ab2	6	USAGE='<upstream> [<head>]'
ae2b0f15	7	. git-sh-setup
4282c4fb	8
2db8aaec JH	9	case $# in 1\|2) ;; *) usage ;; esac
2db8aaec JH	10
7f4bd5d8 JH	11	# Make sure we do not have .dotest
	12	if mkdir .dotest
	13	then
	14	rmdir .dotest
	15	else
	16	echo >&2 '
	17	It seems that I cannot create a .dotest directory, and I wonder if you
	18	are in the middle of patch application or another rebase. If that is not
	19	the case, please rm -fr .dotest and run me again. I am stopping in case
	20	you still have something valuable there.'
	21	exit 1
	22	fi
	23
7f59dbbb	24	# The tree must be really really clean.
215a7ad1	25	git-update-index --refresh \|\| exit
7f59dbbb	26	diff=$(git-diff-index --cached --name-status -r HEAD)
32d99544	27	case "$diff" in
7f59dbbb JH	28	?*) echo "$diff"
	29	exit 1
	30	;;
	31	esac
99a92f92	32
32d99544 LS	33	# The other head is given. Make sure it is valid.
	34	other=$(git-rev-parse --verify "$1^0") \|\| usage
	35
	36	# Make sure the branch to rebase is valid.
	37	head=$(git-rev-parse --verify "${2-HEAD}^0") \|\| exit
	38
9a111c91 JH	39	# If a hook exists, give it a chance to interrupt
	40	if test -x "$GIT_DIR/hooks/pre-rebase"
	41	then
	42	"$GIT_DIR/hooks/pre-rebase" ${1+"$@"} \|\| {
	43	echo >&2 "The pre-rebase hook refused to rebase."
	44	exit 1
	45	}
	46	fi
	47
7f59dbbb	48	# If the branch to rebase is given, first switch to it.
59e6b23a	49	case "$#" in
7f59dbbb	50	2)
3ae39ab2	51	git-checkout "$2" \|\| usage
59e6b23a JH	52	esac
59e6b23a JH	53
7f4bd5d8	54	mb=$(git-merge-base "$other" "$head")
32d99544 LS	55
32d99544 LS	56	# Check if we are already based on $other.
7f4bd5d8 JH	57	if test "$mb" = "$other"
	58	then
	59	echo >&2 "Current branch `git-symbolic-ref HEAD` is up to date."
	60	exit 0
	61	fi
	62
7f59dbbb JH	63	# Rewind the head to "$other"
7f59dbbb JH	64	git-reset --hard "$other"
32d99544 LS	65
	66	# If the $other is a proper descendant of the tip of the branch, then
	67	# we just fast forwarded.
	68	if test "$mb" = "$head"
	69	then
	70	echo >&2 "Fast-forwarded $head to $other."
	71	exit 0
	72	fi
	73
7f59dbbb JH	74	git-format-patch -k --stdout --full-index "$other" ORIG_HEAD \|
7f59dbbb JH	75	git am --binary -3 -k