[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 and make a commit.")"
    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=$(bool_or_string_config pull.ff)
case "$pull_ff" in
true)
	no_ff=--ff
	;;
false)
	no_ff=--no-ff
	;;
only)
	ff_only=--ff-only
	;;
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>'
91e70e00	23	as appropriate to mark resolution and make a commit.")"
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=$(bool_or_string_config pull.rebase)
6b37dff1	54	fi
b814da89 DA	55
b814da89 DA	56	# Setup default fast-forward options via `pull.ff`
db9bb280	57	pull_ff=$(bool_or_string_config pull.ff)
b814da89	58	case "$pull_ff" in
eb8dc05c PT	59	true)
	60	no_ff=--ff
	61	;;
b814da89 DA	62	false)
b814da89 DA	63	no_ff=--no-ff
b814da89 DA	64	;;
	65	only)
	66	ff_only=--ff-only
b814da89 DA	67	;;
	68	esac
	69
	70
29609e68	71	dry_run=
822f7c73	72	while :
60fb5b2c JH	73	do
60fb5b2c JH	74	case "$1" in
7f87aff2	75	-q\|--quiet)
c6576f91	76	verbosity="$verbosity -q" ;;
7f87aff2	77	-v\|--verbose)
c6576f91	78	verbosity="$verbosity -v" ;;
9839018e TRC	79	--progress)
9839018e TRC	80	progress=--progress ;;
bebd2fd7 JK	81	--no-progress)
bebd2fd7 JK	82	progress=--no-progress ;;
d8abe148	83	-n\|--no-stat\|--no-summary)
a334e125	84	diffstat=--no-stat ;;
d8abe148	85	--stat\|--summary)
a334e125	86	diffstat=--stat ;;
efb779f8 SG	87	--log\|--no-log)
efb779f8 SG	88	log_arg=$1 ;;
123ee3ca JH	89	--no-c\|--no-co\|--no-com\|--no-comm\|--no-commi\|--no-commit)
123ee3ca JH	90	no_commit=--no-commit ;;
5072a323 LH	91	--c\|--co\|--com\|--comm\|--commi\|--commit)
5072a323 LH	92	no_commit=--commit ;;
85808300 LT	93	-e\|--edit)
	94	edit=--edit ;;
	95	--no-edit)
	96	edit=--no-edit ;;
7d0c6887 JH	97	--sq\|--squ\|--squa\|--squas\|--squash)
7d0c6887 JH	98	squash=--squash ;;
5072a323 LH	99	--no-sq\|--no-squ\|--no-squa\|--no-squas\|--no-squash)
	100	squash=--no-squash ;;
	101	--ff)
	102	no_ff=--ff ;;
	103	--no-ff)
	104	no_ff=--no-ff ;;
13474835 BG	105	--ff-only)
13474835 BG	106	ff_only=--ff-only ;;
60fb5b2c JH	107	-s=\|--s=\|--st=\|--str=\|--stra=\|--strat=\|--strate=*\|\
	108	--strateg=\|--strategy=\|\
	109	-s\|--s\|--st\|--str\|--stra\|--strat\|--strate\|--strateg\|--strategy)
	110	case "$#,$1" in
	111	,=*)
eadf619c	112	strategy=$(expr "z$1" : 'z-[^=]=\(.\)') ;;
60fb5b2c JH	113	1,*)
	114	usage ;;
	115	*)
	116	strategy="$2"
	117	shift ;;
	118	esac
	119	strategy_args="${strategy_args}-s $strategy "
	120	;;
ee2c7955 AP	121	-X*)
	122	case "$#,$1" in
	123	1,-X)
	124	usage ;;
	125	*,-X)
14e5d40c	126	xx="-X $(git rev-parse --sq-quote "$2")"
ee2c7955 AP	127	shift ;;
ee2c7955 AP	128	,)
14e5d40c	129	xx=$(git rev-parse --sq-quote "$1") ;;
ee2c7955 AP	130	esac
	131	merge_args="$merge_args$xx "
	132	;;
66713ef3 SH	133	-r=\|--r=\|--re=\|--reb=\|--reba=\|--rebas=\|--rebase=*)
	134	rebase="${1#*=}"
	135	;;
cd67e4d4 JS	136	-r\|--r\|--re\|--reb\|--reba\|--rebas\|--rebase)
	137	rebase=true
	138	;;
	139	--no-r\|--no-re\|--no-reb\|--no-reba\|--no-rebas\|--no-rebase)
	140	rebase=false
	141	;;
7dce19d3 JL	142	--recurse-submodules)
	143	recurse_submodules=--recurse-submodules
	144	;;
8f0700dd JL	145	--recurse-submodules=*)
	146	recurse_submodules="$1"
	147	;;
be254a0e JL	148	--no-recurse-submodules)
	149	recurse_submodules=--no-recurse-submodules
	150	;;
efed0022 SG	151	--verify-signatures)
	152	verify_signatures=--verify-signatures
	153	;;
	154	--no-verify-signatures)
	155	verify_signatures=--no-verify-signatures
	156	;;
ea230d8b	157	--gpg-sign\|-S)
	158	gpg_sign_args=-S
	159	;;
	160	--gpg-sign=*)
	161	gpg_sign_args=$(git rev-parse --sq-quote "-S${1#--gpg-sign=}")
	162	;;
	163	-S*)
	164	gpg_sign_args=$(git rev-parse --sq-quote "$1")
	165	;;
29609e68 JK	166	--d\|--dr\|--dry\|--dry-\|--dry-r\|--dry-ru\|--dry-run)
	167	dry_run=--dry-run
	168	;;
87182b17	169	-h\|--help-all)
93d69d86 JL	170	usage
93d69d86 JL	171	;;
822f7c73 DK	172	*)
822f7c73 DK	173	# Pass thru anything that may be meant for fetch.
619e5a0e	174	break
60fb5b2c JH	175	;;
	176	esac
	177	shift
	178	done
	179
66713ef3 SH	180	case "$rebase" in
	181	preserve)
	182	rebase=true
	183	rebase_args=--preserve-merges
	184	;;
	185	true\|false\|'')
	186	;;
	187	*)
	188	echo "Invalid value for --rebase, should be true, false, or preserve"
	189	usage
	190	exit 1
	191	;;
	192	esac
	193
441ed413 JH	194	error_on_no_merge_candidates () {
	195	exec >&2
	196	for opt
	197	do
	198	case "$opt" in
	199	-t\|--t\|--ta\|--tag\|--tags)
c5a84e92	200	echo "It doesn't make sense to pull all tags; you probably meant:"
441ed413 JH	201	echo " git fetch --tags"
	202	exit 1
	203	esac
	204	done
	205
995fc2f7 JK	206	if test true = "$rebase"
	207	then
	208	op_type=rebase
	209	op_prep=against
	210	else
	211	op_type=merge
	212	op_prep=with
	213	fi
	214
b07f7296 RS	215	upstream=$(git config "branch.$curr_branch_short.merge")
b07f7296 RS	216	remote=$(git config "branch.$curr_branch_short.remote")
441ed413	217
a8c9bef4	218	if [ $# -gt 1 ]; then
995fc2f7 JK	219	if [ "$rebase" = true ]; then
	220	printf "There is no candidate for rebasing against "
	221	else
	222	printf "There are no candidates for merging "
	223	fi
	224	echo "among the refs that you just fetched."
a8c9bef4 JK	225	echo "Generally this means that you provided a wildcard refspec which had no"
	226	echo "matches on the remote end."
	227	elif [ $# -gt 0 ] && [ "$1" != "$remote" ]; then
	228	echo "You asked to pull from the remote '$1', but did not specify"
995fc2f7	229	echo "a branch. Because this is not the default configured remote"
a8c9bef4	230	echo "for your current branch, you must specify a branch on the command line."
15a147e6 MZ	231	elif [ -z "$curr_branch" -o -z "$upstream" ]; then
	232	. git-parse-remote
	233	error_on_missing_default_upstream "pull" $op_type $op_prep \
3c02396a	234	"git pull <remote> <branch>"
a6dbf881	235	else
995fc2f7 JK	236	echo "Your configuration specifies to $op_type $op_prep the ref '${upstream#refs/heads/}'"
995fc2f7 JK	237	echo "from the remote, but no such ref was fetched."
61e6108d	238	fi
441ed413 JH	239	exit 1
	240	}
	241
c85c7927	242	test true = "$rebase" && {
19a7fcbf JK	243	if ! git rev-parse -q --verify HEAD >/dev/null
	244	then
	245	# On an unborn branch
	246	if test -f "$GIT_DIR/index"
	247	then
85af5f82	248	die "$(gettext "updating an unborn branch with changes added to the index")"
19a7fcbf JK	249	fi
19a7fcbf JK	250	else
92c62a3f	251	require_clean_work_tree "pull with rebase" "Please commit or stash them."
19a7fcbf	252	fi
d44e7126	253	oldremoteref= &&
e980765c	254	test -n "$curr_branch" &&
c85c7927	255	. git-parse-remote &&
d44e7126	256	remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
ffc2b483	257	oldremoteref=$(git merge-base --fork-point "$remoteref" $curr_branch 2>/dev/null)
c85c7927	258	}
2d179857	259	orig_head=$(git rev-parse -q --verify HEAD)
7dce19d3	260	git fetch $verbosity $progress $dry_run $recurse_submodules --update-head-ok "$@" \|\| exit 1
29609e68	261	test -z "$dry_run" \|\| exit 0
b10ac50f	262
2d179857	263	curr_head=$(git rev-parse -q --verify HEAD)
b0ad11ea	264	if test -n "$orig_head" && test "$curr_head" != "$orig_head"
b10ac50f JH	265	then
	266	# The fetch involved updating the current branch.
	267
	268	# The working tree and the index file is still based on the
	269	# $orig_head commit, but we are merging into $curr_head.
	270	# First update the working tree to match $curr_head.
	271
c2b1a95c	272	eval_gettextln "Warning: fetch updated the current branch head.
3320a973	273	Warning: fast-forwarding your working tree from
c2b1a95c	274	Warning: commit \$orig_head." >&2
7bd93c1c	275	git update-index -q --refresh
5be60078	276	git read-tree -u -m "$orig_head" "$curr_head" \|\|
9f35aaa9	277	die "$(eval_gettext "Cannot fast-forward your working tree.
8323124a	278	After making sure that you saved anything precious from
9f35aaa9	279	$ git diff \$orig_head
8323124a JH	280	output, run
8323124a JH	281	$ git reset --hard
9f35aaa9	282	to recover.")"
8323124a	283
b10ac50f JH	284	fi
b10ac50f JH	285
05dd8e2e JH	286	merge_head=$(sed -e '/ not-for-merge /d' \
	287	-e 's/ .*//' "$GIT_DIR"/FETCH_HEAD \| \
	288	tr '\012' ' ')
e0bfc81e JH	289
e0bfc81e JH	290	case "$merge_head" in
521003ff	291	'')
4973aa22	292	error_on_no_merge_candidates "$@"
521003ff	293	;;
60fb5b2c	294	?' '?)
d09e79cb LT	295	if test -z "$orig_head"
d09e79cb LT	296	then
85af5f82	297	die "$(gettext "Cannot merge multiple branches into empty head")"
d09e79cb	298	fi
51b2ead0 JS	299	if test true = "$rebase"
51b2ead0 JS	300	then
85af5f82	301	die "$(gettext "Cannot rebase onto multiple branches")"
51b2ead0	302	fi
60fb5b2c JH	303	;;
	304	esac
	305
b4dc085a TR	306	# Pulling into unborn branch: a shorthand for branching off
b4dc085a TR	307	# FETCH_HEAD, for lazy typers.
d09e79cb LT	308	if test -z "$orig_head"
d09e79cb LT	309	then
b4dc085a TR	310	# Two-way merge: we claim the index is based on an empty tree,
	311	# and try to fast-forward to HEAD. This ensures we will not
	312	# lose index/worktree changes that the user already made on
	313	# the unborn branch.
	314	empty_tree=4b825dc642cb6eb9a060e54bf8d69288fbee4904
	315	git read-tree -m -u $empty_tree $merge_head &&
9f48f2bd	316	git update-ref -m "initial pull" HEAD $merge_head "$curr_head"
d09e79cb LT	317	exit
	318	fi
	319
cf65426d EN	320	if test true = "$rebase"
	321	then
	322	o=$(git show-branch --merge-base $curr_branch $merge_head $oldremoteref)
	323	if test "$oldremoteref" = "$o"
	324	then
	325	unset oldremoteref
	326	fi
	327	fi
	328
efb779f8	329	merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") \|\| exit
14e5d40c JH	330	case "$rebase" in
14e5d40c JH	331	true)
66713ef3	332	eval="git-rebase $diffstat $strategy_args $merge_args $rebase_args $verbosity"
ea230d8b	333	eval="$eval $gpg_sign_args"
14e5d40c JH	334	eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}"
	335	;;
	336	*)
efed0022	337	eval="git-merge $diffstat $no_commit $verify_signatures $edit $squash $no_ff $ff_only"
ea230d8b	338	eval="$eval $log_arg $strategy_args $merge_args $verbosity $progress"
ea230d8b	339	eval="$eval $gpg_sign_args"
bebd2fd7	340	eval="$eval \"\$merge_name\" HEAD $merge_head"
14e5d40c JH	341	;;
	342	esac
	343	eval "exec $eval"