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

#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
# Fetch one or more remote refs and merge it/them into the current HEAD.

USAGE='[-n | --no-stat] [--[no-]commit] [--[no-]squash] [--[no-]ff|--ff-only] [--[no-]rebase|--rebase=preserve] [-s strategy]... [<fetch-options>] <repo> <head>...'
LONG_USAGE='Fetch one or more remote refs and integrate it/them with the current HEAD.'
SUBDIRECTORY_OK=Yes
OPTIONS_SPEC=
. git-sh-setup
. git-sh-i18n
set_reflog_action "pull${1+ $*}"
require_work_tree_exists
cd_to_toplevel


die_conflict () {
    git diff-index --cached --name-status -r --ignore-submodules HEAD --
    if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then
	die "$(gettext "Pull is not possible because you have unmerged files.
Please, fix them up in the work tree, and then use 'git add/rm <file>'
as appropriate to mark resolution, or use 'git commit -a'.")"
    else
	die "$(gettext "Pull is not possible because you have unmerged files.")"
    fi
}

die_merge () {
    if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then
	die "$(gettext "You have not concluded your merge (MERGE_HEAD exists).
Please, commit your changes before you can merge.")"
    else
	die "$(gettext "You have not concluded your merge (MERGE_HEAD exists).")"
    fi
}

test -z "$(git ls-files -u)" || die_conflict
test -f "$GIT_DIR/MERGE_HEAD" && die_merge

bool_or_string_config () {
	git config --bool "$1" 2>/dev/null || git config "$1"
}

strategy_args= diffstat= no_commit= squash= no_ff= ff_only=
log_arg= verbosity= progress= recurse_submodules= verify_signatures=
merge_args= edit= rebase_args=
curr_branch=$(git symbolic-ref -q HEAD)
curr_branch_short="${curr_branch#refs/heads/}"
rebase=$(bool_or_string_config branch.$curr_branch_short.rebase)
if test -z "$rebase"
then
	rebase=$(bool_or_string_config pull.rebase)
fi

# Setup default fast-forward options via `pull.ff`
pull_ff=$(git config pull.ff)
case "$pull_ff" in
false)
	no_ff=--no-ff
	break
	;;
only)
	ff_only=--ff-only
	break
	;;
esac


dry_run=
while :
do
	case "$1" in
	-q|--quiet)
		verbosity="$verbosity -q" ;;
	-v|--verbose)
		verbosity="$verbosity -v" ;;
	--progress)
		progress=--progress ;;
	--no-progress)
		progress=--no-progress ;;
	-n|--no-stat|--no-summary)
		diffstat=--no-stat ;;
	--stat|--summary)
		diffstat=--stat ;;
	--log|--no-log)
		log_arg=$1 ;;
	--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
		no_commit=--no-commit ;;
	--c|--co|--com|--comm|--commi|--commit)
		no_commit=--commit ;;
	-e|--edit)
		edit=--edit ;;
	--no-edit)
		edit=--no-edit ;;
	--sq|--squ|--squa|--squas|--squash)
		squash=--squash ;;
	--no-sq|--no-squ|--no-squa|--no-squas|--no-squash)
		squash=--no-squash ;;
	--ff)
		no_ff=--ff ;;
	--no-ff)
		no_ff=--no-ff ;;
	--ff-only)
		ff_only=--ff-only ;;
	-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
		--strateg=*|--strategy=*|\
	-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
		case "$#,$1" in
		*,*=*)
			strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;;
		1,*)
			usage ;;
		*)
			strategy="$2"
			shift ;;
		esac
		strategy_args="${strategy_args}-s $strategy "
		;;
	-X*)
		case "$#,$1" in
		1,-X)
			usage ;;
		*,-X)
			xx="-X $(git rev-parse --sq-quote "$2")"
			shift ;;
		*,*)
			xx=$(git rev-parse --sq-quote "$1") ;;
		esac
		merge_args="$merge_args$xx "
		;;
	-r=*|--r=*|--re=*|--reb=*|--reba=*|--rebas=*|--rebase=*)
		rebase="${1#*=}"
		;;
	-r|--r|--re|--reb|--reba|--rebas|--rebase)
		rebase=true
		;;
	--no-r|--no-re|--no-reb|--no-reba|--no-rebas|--no-rebase)
		rebase=false
		;;
	--recurse-submodules)
		recurse_submodules=--recurse-submodules
		;;
	--recurse-submodules=*)
		recurse_submodules="$1"
		;;
	--no-recurse-submodules)
		recurse_submodules=--no-recurse-submodules
		;;
	--verify-signatures)
		verify_signatures=--verify-signatures
		;;
	--no-verify-signatures)
		verify_signatures=--no-verify-signatures
		;;
	--gpg-sign|-S)
		gpg_sign_args=-S
		;;
	--gpg-sign=*)
		gpg_sign_args=$(git rev-parse --sq-quote "-S${1#--gpg-sign=}")
		;;
	-S*)
		gpg_sign_args=$(git rev-parse --sq-quote "$1")
		;;
	--d|--dr|--dry|--dry-|--dry-r|--dry-ru|--dry-run)
		dry_run=--dry-run
		;;
	-h|--help-all)
		usage
		;;
	*)
		# Pass thru anything that may be meant for fetch.
		break
		;;
	esac
	shift
done

case "$rebase" in
preserve)
	rebase=true
	rebase_args=--preserve-merges
	;;
true|false|'')
	;;
*)
	echo "Invalid value for --rebase, should be true, false, or preserve"
	usage
	exit 1
	;;
esac

error_on_no_merge_candidates () {
	exec >&2
	for opt
	do
		case "$opt" in
		-t|--t|--ta|--tag|--tags)
			echo "It doesn't make sense to pull all tags; you probably meant:"
			echo "  git fetch --tags"
			exit 1
		esac
	done

	if test true = "$rebase"
	then
		op_type=rebase
		op_prep=against
	else
		op_type=merge
		op_prep=with
	fi

	upstream=$(git config "branch.$curr_branch_short.merge")
	remote=$(git config "branch.$curr_branch_short.remote")

	if [ $# -gt 1 ]; then
		if [ "$rebase" = true ]; then
			printf "There is no candidate for rebasing against "
		else
			printf "There are no candidates for merging "
		fi
		echo "among the refs that you just fetched."
		echo "Generally this means that you provided a wildcard refspec which had no"
		echo "matches on the remote end."
	elif [ $# -gt 0 ] && [ "$1" != "$remote" ]; then
		echo "You asked to pull from the remote '$1', but did not specify"
		echo "a branch. Because this is not the default configured remote"
		echo "for your current branch, you must specify a branch on the command line."
	elif [ -z "$curr_branch" -o -z "$upstream" ]; then
		. git-parse-remote
		error_on_missing_default_upstream "pull" $op_type $op_prep \
			"git pull <remote> <branch>"
	else
		echo "Your configuration specifies to $op_type $op_prep the ref '${upstream#refs/heads/}'"
		echo "from the remote, but no such ref was fetched."
	fi
	exit 1
}

test true = "$rebase" && {
	if ! git rev-parse -q --verify HEAD >/dev/null
	then
		# On an unborn branch
		if test -f "$GIT_DIR/index"
		then
			die "$(gettext "updating an unborn branch with changes added to the index")"
		fi
	else
		require_clean_work_tree "pull with rebase" "Please commit or stash them."
	fi
	oldremoteref= &&
	test -n "$curr_branch" &&
	. git-parse-remote &&
	remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
	oldremoteref=$(git merge-base --fork-point "$remoteref" $curr_branch 2>/dev/null)
}
orig_head=$(git rev-parse -q --verify HEAD)
git fetch $verbosity $progress $dry_run $recurse_submodules --update-head-ok "$@" || exit 1
test -z "$dry_run" || exit 0

curr_head=$(git rev-parse -q --verify HEAD)
if test -n "$orig_head" && test "$curr_head" != "$orig_head"
then
	# The fetch involved updating the current branch.

	# The working tree and the index file is still based on the
	# $orig_head commit, but we are merging into $curr_head.
	# First update the working tree to match $curr_head.

	eval_gettextln "Warning: fetch updated the current branch head.
Warning: fast-forwarding your working tree from
Warning: commit \$orig_head." >&2
	git update-index -q --refresh
	git read-tree -u -m "$orig_head" "$curr_head" ||
		die "$(eval_gettext "Cannot fast-forward your working tree.
After making sure that you saved anything precious from
$ git diff \$orig_head
output, run
$ git reset --hard
to recover.")"

fi

merge_head=$(sed -e '/	not-for-merge	/d' \
	-e 's/	.*//' "$GIT_DIR"/FETCH_HEAD | \
	tr '\012' ' ')

case "$merge_head" in
'')
	error_on_no_merge_candidates "$@"
	;;
?*' '?*)
	if test -z "$orig_head"
	then
		die "$(gettext "Cannot merge multiple branches into empty head")"
	fi
	if test true = "$rebase"
	then
		die "$(gettext "Cannot rebase onto multiple branches")"
	fi
	;;
esac

# Pulling into unborn branch: a shorthand for branching off
# FETCH_HEAD, for lazy typers.
if test -z "$orig_head"
then
	# Two-way merge: we claim the index is based on an empty tree,
	# and try to fast-forward to HEAD.  This ensures we will not
	# lose index/worktree changes that the user already made on
	# the unborn branch.
	empty_tree=4b825dc642cb6eb9a060e54bf8d69288fbee4904
	git read-tree -m -u $empty_tree $merge_head &&
	git update-ref -m "initial pull" HEAD $merge_head "$curr_head"
	exit
fi

if test true = "$rebase"
then
	o=$(git show-branch --merge-base $curr_branch $merge_head $oldremoteref)
	if test "$oldremoteref" = "$o"
	then
		unset oldremoteref
	fi
fi

merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit
case "$rebase" in
true)
	eval="git-rebase $diffstat $strategy_args $merge_args $rebase_args $verbosity"
	eval="$eval $gpg_sign_args"
	eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}"
	;;
*)
	eval="git-merge $diffstat $no_commit $verify_signatures $edit $squash $no_ff $ff_only"
	eval="$eval $log_arg $strategy_args $merge_args $verbosity $progress"
	eval="$eval $gpg_sign_args"
	eval="$eval \"\$merge_name\" HEAD $merge_head"
	;;
esac
eval "exec $eval"
Commit	Line	Data
839a7a06 LT	1	#!/bin/sh
839a7a06 LT	2	#
521003ff JH	3	# Copyright (c) 2005 Junio C Hamano
	4	#
	5	# Fetch one or more remote refs and merge it/them into the current HEAD.
	6
ef93e3a4	7	USAGE='[-n \| --no-stat] [--[no-]commit] [--[no-]squash] [--[no-]ff\|--ff-only] [--[no-]rebase\|--rebase=preserve] [-s strategy]... [<fetch-options>] <repo> <head>...'
153d7265	8	LONG_USAGE='Fetch one or more remote refs and integrate it/them with the current HEAD.'
533b7039	9	SUBDIRECTORY_OK=Yes
8f321a39	10	OPTIONS_SPEC=
ae2b0f15	11	. git-sh-setup
a9f57868	12	. git-sh-i18n
c98d1e41	13	set_reflog_action "pull${1+ $*}"
035b5bf6	14	require_work_tree_exists
533b7039	15	cd_to_toplevel
b10ac50f	16
d38a30df MM	17
	18	die_conflict () {
	19	git diff-index --cached --name-status -r --ignore-submodules HEAD --
	20	if [ $(git config --bool --get advice.resolveConflict \|\| echo true) = "true" ]; then
85af5f82	21	die "$(gettext "Pull is not possible because you have unmerged files.
d38a30df	22	Please, fix them up in the work tree, and then use 'git add/rm <file>'
85af5f82	23	as appropriate to mark resolution, or use 'git commit -a'.")"
d38a30df	24	else
85af5f82	25	die "$(gettext "Pull is not possible because you have unmerged files.")"
d38a30df MM	26	fi
	27	}
	28
	29	die_merge () {
	30	if [ $(git config --bool --get advice.resolveConflict \|\| echo true) = "true" ]; then
85af5f82 ÆAB	31	die "$(gettext "You have not concluded your merge (MERGE_HEAD exists).
85af5f82 ÆAB	32	Please, commit your changes before you can merge.")"
d38a30df	33	else
85af5f82	34	die "$(gettext "You have not concluded your merge (MERGE_HEAD exists).")"
d38a30df MM	35	fi
	36	}
	37
	38	test -z "$(git ls-files -u)" \|\| die_conflict
	39	test -f "$GIT_DIR/MERGE_HEAD" && die_merge
d1014a17	40
66713ef3 SH	41	bool_or_string_config () {
	42	git config --bool "$1" 2>/dev/null \|\| git config "$1"
	43	}
	44
13474835	45	strategy_args= diffstat= no_commit= squash= no_ff= ff_only=
efed0022	46	log_arg= verbosity= progress= recurse_submodules= verify_signatures=
66713ef3	47	merge_args= edit= rebase_args=
cd67e4d4	48	curr_branch=$(git symbolic-ref -q HEAD)
0d12e59f	49	curr_branch_short="${curr_branch#refs/heads/}"
66713ef3	50	rebase=$(bool_or_string_config branch.$curr_branch_short.rebase)
6b37dff1 ÆAB	51	if test -z "$rebase"
6b37dff1 ÆAB	52	then
66713ef3	53	rebase=$(bool_or_string_config pull.rebase)
6b37dff1	54	fi
b814da89 DA	55
	56	# Setup default fast-forward options via `pull.ff`
	57	pull_ff=$(git config pull.ff)
	58	case "$pull_ff" in
	59	false)
	60	no_ff=--no-ff
	61	break
	62	;;
	63	only)
	64	ff_only=--ff-only
	65	break
	66	;;
	67	esac
	68
	69
29609e68	70	dry_run=
822f7c73	71	while :
60fb5b2c JH	72	do
60fb5b2c JH	73	case "$1" in
7f87aff2	74	-q\|--quiet)
c6576f91	75	verbosity="$verbosity -q" ;;
7f87aff2	76	-v\|--verbose)
c6576f91	77	verbosity="$verbosity -v" ;;
9839018e TRC	78	--progress)
9839018e TRC	79	progress=--progress ;;
bebd2fd7 JK	80	--no-progress)
bebd2fd7 JK	81	progress=--no-progress ;;
d8abe148	82	-n\|--no-stat\|--no-summary)
a334e125	83	diffstat=--no-stat ;;
d8abe148	84	--stat\|--summary)
a334e125	85	diffstat=--stat ;;
efb779f8 SG	86	--log\|--no-log)
efb779f8 SG	87	log_arg=$1 ;;
123ee3ca JH	88	--no-c\|--no-co\|--no-com\|--no-comm\|--no-commi\|--no-commit)
123ee3ca JH	89	no_commit=--no-commit ;;
5072a323 LH	90	--c\|--co\|--com\|--comm\|--commi\|--commit)
5072a323 LH	91	no_commit=--commit ;;
85808300 LT	92	-e\|--edit)
	93	edit=--edit ;;
	94	--no-edit)
	95	edit=--no-edit ;;
7d0c6887 JH	96	--sq\|--squ\|--squa\|--squas\|--squash)
7d0c6887 JH	97	squash=--squash ;;
5072a323 LH	98	--no-sq\|--no-squ\|--no-squa\|--no-squas\|--no-squash)
	99	squash=--no-squash ;;
	100	--ff)
	101	no_ff=--ff ;;
	102	--no-ff)
	103	no_ff=--no-ff ;;
13474835 BG	104	--ff-only)
13474835 BG	105	ff_only=--ff-only ;;
60fb5b2c JH	106	-s=\|--s=\|--st=\|--str=\|--stra=\|--strat=\|--strate=*\|\
	107	--strateg=\|--strategy=\|\
	108	-s\|--s\|--st\|--str\|--stra\|--strat\|--strate\|--strateg\|--strategy)
	109	case "$#,$1" in
	110	,=*)
8096fae7	111	strategy=`expr "z$1" : 'z-[^=]=\(.\)'` ;;
60fb5b2c JH	112	1,*)
	113	usage ;;
	114	*)
	115	strategy="$2"
	116	shift ;;
	117	esac
	118	strategy_args="${strategy_args}-s $strategy "
	119	;;
ee2c7955 AP	120	-X*)
	121	case "$#,$1" in
	122	1,-X)
	123	usage ;;
	124	*,-X)
14e5d40c	125	xx="-X $(git rev-parse --sq-quote "$2")"
ee2c7955 AP	126	shift ;;
ee2c7955 AP	127	,)
14e5d40c	128	xx=$(git rev-parse --sq-quote "$1") ;;
ee2c7955 AP	129	esac
	130	merge_args="$merge_args$xx "
	131	;;
66713ef3 SH	132	-r=\|--r=\|--re=\|--reb=\|--reba=\|--rebas=\|--rebase=*)
	133	rebase="${1#*=}"
	134	;;
cd67e4d4 JS	135	-r\|--r\|--re\|--reb\|--reba\|--rebas\|--rebase)
	136	rebase=true
	137	;;
	138	--no-r\|--no-re\|--no-reb\|--no-reba\|--no-rebas\|--no-rebase)
	139	rebase=false
	140	;;
7dce19d3 JL	141	--recurse-submodules)
	142	recurse_submodules=--recurse-submodules
	143	;;
8f0700dd JL	144	--recurse-submodules=*)
	145	recurse_submodules="$1"
	146	;;
be254a0e JL	147	--no-recurse-submodules)
	148	recurse_submodules=--no-recurse-submodules
	149	;;
efed0022 SG	150	--verify-signatures)
	151	verify_signatures=--verify-signatures
	152	;;
	153	--no-verify-signatures)
	154	verify_signatures=--no-verify-signatures
	155	;;
ea230d8b	156	--gpg-sign\|-S)
	157	gpg_sign_args=-S
	158	;;
	159	--gpg-sign=*)
	160	gpg_sign_args=$(git rev-parse --sq-quote "-S${1#--gpg-sign=}")
	161	;;
	162	-S*)
	163	gpg_sign_args=$(git rev-parse --sq-quote "$1")
	164	;;
29609e68 JK	165	--d\|--dr\|--dry\|--dry-\|--dry-r\|--dry-ru\|--dry-run)
	166	dry_run=--dry-run
	167	;;
87182b17	168	-h\|--help-all)
93d69d86 JL	169	usage
93d69d86 JL	170	;;
822f7c73 DK	171	*)
822f7c73 DK	172	# Pass thru anything that may be meant for fetch.
619e5a0e	173	break
60fb5b2c JH	174	;;
	175	esac
	176	shift
	177	done
	178
66713ef3 SH	179	case "$rebase" in
	180	preserve)
	181	rebase=true
	182	rebase_args=--preserve-merges
	183	;;
	184	true\|false\|'')
	185	;;
	186	*)
	187	echo "Invalid value for --rebase, should be true, false, or preserve"
	188	usage
	189	exit 1
	190	;;
	191	esac
	192
441ed413 JH	193	error_on_no_merge_candidates () {
	194	exec >&2
	195	for opt
	196	do
	197	case "$opt" in
	198	-t\|--t\|--ta\|--tag\|--tags)
c5a84e92	199	echo "It doesn't make sense to pull all tags; you probably meant:"
441ed413 JH	200	echo " git fetch --tags"
	201	exit 1
	202	esac
	203	done
	204
995fc2f7 JK	205	if test true = "$rebase"
	206	then
	207	op_type=rebase
	208	op_prep=against
	209	else
	210	op_type=merge
	211	op_prep=with
	212	fi
	213
b07f7296 RS	214	upstream=$(git config "branch.$curr_branch_short.merge")
b07f7296 RS	215	remote=$(git config "branch.$curr_branch_short.remote")
441ed413	216
a8c9bef4	217	if [ $# -gt 1 ]; then
995fc2f7 JK	218	if [ "$rebase" = true ]; then
	219	printf "There is no candidate for rebasing against "
	220	else
	221	printf "There are no candidates for merging "
	222	fi
	223	echo "among the refs that you just fetched."
a8c9bef4 JK	224	echo "Generally this means that you provided a wildcard refspec which had no"
	225	echo "matches on the remote end."
	226	elif [ $# -gt 0 ] && [ "$1" != "$remote" ]; then
	227	echo "You asked to pull from the remote '$1', but did not specify"
995fc2f7	228	echo "a branch. Because this is not the default configured remote"
a8c9bef4	229	echo "for your current branch, you must specify a branch on the command line."
15a147e6 MZ	230	elif [ -z "$curr_branch" -o -z "$upstream" ]; then
	231	. git-parse-remote
	232	error_on_missing_default_upstream "pull" $op_type $op_prep \
3c02396a	233	"git pull <remote> <branch>"
a6dbf881	234	else
995fc2f7 JK	235	echo "Your configuration specifies to $op_type $op_prep the ref '${upstream#refs/heads/}'"
995fc2f7 JK	236	echo "from the remote, but no such ref was fetched."
61e6108d	237	fi
441ed413 JH	238	exit 1
	239	}
	240
c85c7927	241	test true = "$rebase" && {
19a7fcbf JK	242	if ! git rev-parse -q --verify HEAD >/dev/null
	243	then
	244	# On an unborn branch
	245	if test -f "$GIT_DIR/index"
	246	then
85af5f82	247	die "$(gettext "updating an unborn branch with changes added to the index")"
19a7fcbf JK	248	fi
19a7fcbf JK	249	else
92c62a3f	250	require_clean_work_tree "pull with rebase" "Please commit or stash them."
19a7fcbf	251	fi
d44e7126	252	oldremoteref= &&
e980765c	253	test -n "$curr_branch" &&
c85c7927	254	. git-parse-remote &&
d44e7126	255	remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
ffc2b483	256	oldremoteref=$(git merge-base --fork-point "$remoteref" $curr_branch 2>/dev/null)
c85c7927	257	}
2d179857	258	orig_head=$(git rev-parse -q --verify HEAD)
7dce19d3	259	git fetch $verbosity $progress $dry_run $recurse_submodules --update-head-ok "$@" \|\| exit 1
29609e68	260	test -z "$dry_run" \|\| exit 0
b10ac50f	261
2d179857	262	curr_head=$(git rev-parse -q --verify HEAD)
b0ad11ea	263	if test -n "$orig_head" && test "$curr_head" != "$orig_head"
b10ac50f JH	264	then
	265	# The fetch involved updating the current branch.
	266
	267	# The working tree and the index file is still based on the
	268	# $orig_head commit, but we are merging into $curr_head.
	269	# First update the working tree to match $curr_head.
	270
c2b1a95c	271	eval_gettextln "Warning: fetch updated the current branch head.
3320a973	272	Warning: fast-forwarding your working tree from
c2b1a95c	273	Warning: commit \$orig_head." >&2
7bd93c1c	274	git update-index -q --refresh
5be60078	275	git read-tree -u -m "$orig_head" "$curr_head" \|\|
9f35aaa9	276	die "$(eval_gettext "Cannot fast-forward your working tree.
8323124a	277	After making sure that you saved anything precious from
9f35aaa9	278	$ git diff \$orig_head
8323124a JH	279	output, run
8323124a JH	280	$ git reset --hard
9f35aaa9	281	to recover.")"
8323124a	282
b10ac50f JH	283	fi
b10ac50f JH	284
05dd8e2e JH	285	merge_head=$(sed -e '/ not-for-merge /d' \
	286	-e 's/ .*//' "$GIT_DIR"/FETCH_HEAD \| \
	287	tr '\012' ' ')
e0bfc81e JH	288
e0bfc81e JH	289	case "$merge_head" in
521003ff	290	'')
4973aa22	291	error_on_no_merge_candidates "$@"
521003ff	292	;;
60fb5b2c	293	?' '?)
d09e79cb LT	294	if test -z "$orig_head"
d09e79cb LT	295	then
85af5f82	296	die "$(gettext "Cannot merge multiple branches into empty head")"
d09e79cb	297	fi
51b2ead0 JS	298	if test true = "$rebase"
51b2ead0 JS	299	then
85af5f82	300	die "$(gettext "Cannot rebase onto multiple branches")"
51b2ead0	301	fi
60fb5b2c JH	302	;;
	303	esac
	304
b4dc085a TR	305	# Pulling into unborn branch: a shorthand for branching off
b4dc085a TR	306	# FETCH_HEAD, for lazy typers.
d09e79cb LT	307	if test -z "$orig_head"
d09e79cb LT	308	then
b4dc085a TR	309	# Two-way merge: we claim the index is based on an empty tree,
	310	# and try to fast-forward to HEAD. This ensures we will not
	311	# lose index/worktree changes that the user already made on
	312	# the unborn branch.
	313	empty_tree=4b825dc642cb6eb9a060e54bf8d69288fbee4904
	314	git read-tree -m -u $empty_tree $merge_head &&
9f48f2bd	315	git update-ref -m "initial pull" HEAD $merge_head "$curr_head"
d09e79cb LT	316	exit
	317	fi
	318
cf65426d EN	319	if test true = "$rebase"
	320	then
	321	o=$(git show-branch --merge-base $curr_branch $merge_head $oldremoteref)
	322	if test "$oldremoteref" = "$o"
	323	then
	324	unset oldremoteref
	325	fi
	326	fi
	327
efb779f8	328	merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") \|\| exit
14e5d40c JH	329	case "$rebase" in
14e5d40c JH	330	true)
66713ef3	331	eval="git-rebase $diffstat $strategy_args $merge_args $rebase_args $verbosity"
ea230d8b	332	eval="$eval $gpg_sign_args"
14e5d40c JH	333	eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}"
	334	;;
	335	*)
efed0022	336	eval="git-merge $diffstat $no_commit $verify_signatures $edit $squash $no_ff $ff_only"
ea230d8b	337	eval="$eval $log_arg $strategy_args $merge_args $verbosity $progress"
ea230d8b	338	eval="$eval $gpg_sign_args"
bebd2fd7	339	eval="$eval \"\$merge_name\" HEAD $merge_head"
14e5d40c JH	340	;;
	341	esac
	342	eval "exec $eval"