[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] [-s strategy]... [<fetch-options>] <repo> <head>...'
LONG_USAGE='Fetch one or more remote refs and merge it/them into 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

strategy_args= diffstat= no_commit= squash= no_ff= ff_only=
log_arg= verbosity= progress= recurse_submodules=
merge_args=
curr_branch=$(git symbolic-ref -q HEAD)
curr_branch_short="${curr_branch#refs/heads/}"
rebase=$(git config --bool branch.$curr_branch_short.rebase)
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=$1 ;;
	--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
		no_commit=--no-commit ;;
	--c|--co|--com|--comm|--commi|--commit)
		no_commit=--commit ;;
	--sq|--squ|--squa|--squas|--squash)
		squash=--squash ;;
	--no-sq|--no-squ|--no-squa|--no-squas|--no-squash)
		squash=--no-squash ;;
	--ff)
		no_ff=--ff ;;
	--no-ff)
		no_ff=--no-ff ;;
	--ff-only)
		ff_only=--ff-only ;;
	-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
		--strateg=*|--strategy=*|\
	-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
		case "$#,$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=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
		;;
	--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

error_on_no_merge_candidates () {
	exec >&2
	for opt
	do
		case "$opt" in
		-t|--t|--ta|--tag|--tags)
			echo "Fetching tags only, 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

	curr_branch=${curr_branch#refs/heads/}
	upstream=$(git config "branch.$curr_branch.merge")
	remote=$(git config "branch.$curr_branch.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 <repository> <refspec>"
	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 "$(gettext "updating an unborn branch with changes added to the index")"
		fi
	else
		require_clean_work_tree "pull with rebase" "Please commit or stash them."
	fi
	oldremoteref= &&
	. git-parse-remote &&
	remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
	oldremoteref="$(git rev-parse -q --verify "$remoteref")" &&
	for reflog in $(git rev-list -g $remoteref 2>/dev/null)
	do
		if test "$reflog" = "$(git merge-base $reflog $curr_branch)"
		then
			oldremoteref="$reflog"
			break
		fi
	done
}
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

if test -z "$orig_head"
then
	git update-ref -m "initial pull" HEAD $merge_head "$curr_head" &&
	git read-tree -m -u HEAD || exit 1
	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 $merge_args"
	eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}"
	;;
*)
	eval="git-merge $diffstat $no_commit $squash $no_ff $ff_only"
	eval="$eval  $log_arg $strategy_args $merge_args $verbosity $progress"
	eval="$eval \"\$merge_name\" HEAD $merge_head"
	;;
esac
eval "exec $eval"
Commit	Line	Data
839a7a06 LT	1	#!/bin/sh
839a7a06 LT	2	#
521003ff JH	3	# Copyright (c) 2005 Junio C Hamano
	4	#
	5	# Fetch one or more remote refs and merge it/them into the current HEAD.
	6
d8abe148	7	USAGE='[-n \| --no-stat] [--[no-]commit] [--[no-]squash] [--[no-]ff] [-s strategy]... [<fetch-options>] <repo> <head>...'
806f36d4	8	LONG_USAGE='Fetch one or more remote refs and merge it/them into the current HEAD.'
533b7039	9	SUBDIRECTORY_OK=Yes
8f321a39	10	OPTIONS_SPEC=
ae2b0f15	11	. git-sh-setup
a9f57868	12	. git-sh-i18n
c98d1e41	13	set_reflog_action "pull${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 "$GIT_DIR/MERGE_HEAD" && die_merge
d1014a17	40
13474835	41	strategy_args= diffstat= no_commit= squash= no_ff= ff_only=
7dce19d3	42	log_arg= verbosity= progress= recurse_submodules=
ee2c7955	43	merge_args=
cd67e4d4	44	curr_branch=$(git symbolic-ref -q HEAD)
0d12e59f	45	curr_branch_short="${curr_branch#refs/heads/}"
cd67e4d4	46	rebase=$(git config --bool branch.$curr_branch_short.rebase)
29609e68	47	dry_run=
822f7c73	48	while :
60fb5b2c JH	49	do
60fb5b2c JH	50	case "$1" in
7f87aff2	51	-q\|--quiet)
c6576f91	52	verbosity="$verbosity -q" ;;
7f87aff2	53	-v\|--verbose)
c6576f91	54	verbosity="$verbosity -v" ;;
9839018e TRC	55	--progress)
9839018e TRC	56	progress=--progress ;;
bebd2fd7 JK	57	--no-progress)
bebd2fd7 JK	58	progress=--no-progress ;;
d8abe148	59	-n\|--no-stat\|--no-summary)
a334e125	60	diffstat=--no-stat ;;
d8abe148	61	--stat\|--summary)
a334e125	62	diffstat=--stat ;;
efb779f8 SG	63	--log\|--no-log)
efb779f8 SG	64	log_arg=$1 ;;
123ee3ca JH	65	--no-c\|--no-co\|--no-com\|--no-comm\|--no-commi\|--no-commit)
123ee3ca JH	66	no_commit=--no-commit ;;
5072a323 LH	67	--c\|--co\|--com\|--comm\|--commi\|--commit)
5072a323 LH	68	no_commit=--commit ;;
7d0c6887 JH	69	--sq\|--squ\|--squa\|--squas\|--squash)
7d0c6887 JH	70	squash=--squash ;;
5072a323 LH	71	--no-sq\|--no-squ\|--no-squa\|--no-squas\|--no-squash)
	72	squash=--no-squash ;;
	73	--ff)
	74	no_ff=--ff ;;
	75	--no-ff)
	76	no_ff=--no-ff ;;
13474835 BG	77	--ff-only)
13474835 BG	78	ff_only=--ff-only ;;
60fb5b2c JH	79	-s=\|--s=\|--st=\|--str=\|--stra=\|--strat=\|--strate=*\|\
	80	--strateg=\|--strategy=\|\
	81	-s\|--s\|--st\|--str\|--stra\|--strat\|--strate\|--strateg\|--strategy)
	82	case "$#,$1" in
	83	,=*)
8096fae7	84	strategy=`expr "z$1" : 'z-[^=]=\(.\)'` ;;
60fb5b2c JH	85	1,*)
	86	usage ;;
	87	*)
	88	strategy="$2"
	89	shift ;;
	90	esac
	91	strategy_args="${strategy_args}-s $strategy "
	92	;;
ee2c7955 AP	93	-X*)
	94	case "$#,$1" in
	95	1,-X)
	96	usage ;;
	97	*,-X)
14e5d40c	98	xx="-X $(git rev-parse --sq-quote "$2")"
ee2c7955 AP	99	shift ;;
ee2c7955 AP	100	,)
14e5d40c	101	xx=$(git rev-parse --sq-quote "$1") ;;
ee2c7955 AP	102	esac
	103	merge_args="$merge_args$xx "
	104	;;
cd67e4d4 JS	105	-r\|--r\|--re\|--reb\|--reba\|--rebas\|--rebase)
	106	rebase=true
	107	;;
	108	--no-r\|--no-re\|--no-reb\|--no-reba\|--no-rebas\|--no-rebase)
	109	rebase=false
	110	;;
7dce19d3 JL	111	--recurse-submodules)
	112	recurse_submodules=--recurse-submodules
	113	;;
8f0700dd JL	114	--recurse-submodules=*)
	115	recurse_submodules="$1"
	116	;;
be254a0e JL	117	--no-recurse-submodules)
	118	recurse_submodules=--no-recurse-submodules
	119	;;
29609e68 JK	120	--d\|--dr\|--dry\|--dry-\|--dry-r\|--dry-ru\|--dry-run)
	121	dry_run=--dry-run
	122	;;
87182b17	123	-h\|--help-all)
93d69d86 JL	124	usage
93d69d86 JL	125	;;
822f7c73 DK	126	*)
822f7c73 DK	127	# Pass thru anything that may be meant for fetch.
619e5a0e	128	break
60fb5b2c JH	129	;;
	130	esac
	131	shift
	132	done
	133
441ed413 JH	134	error_on_no_merge_candidates () {
	135	exec >&2
	136	for opt
	137	do
	138	case "$opt" in
	139	-t\|--t\|--ta\|--tag\|--tags)
	140	echo "Fetching tags only, you probably meant:"
	141	echo " git fetch --tags"
	142	exit 1
	143	esac
	144	done
	145
995fc2f7 JK	146	if test true = "$rebase"
	147	then
	148	op_type=rebase
	149	op_prep=against
	150	else
	151	op_type=merge
	152	op_prep=with
	153	fi
	154
441ed413	155	curr_branch=${curr_branch#refs/heads/}
a6dbf881	156	upstream=$(git config "branch.$curr_branch.merge")
a8c9bef4	157	remote=$(git config "branch.$curr_branch.remote")
441ed413	158
a8c9bef4	159	if [ $# -gt 1 ]; then
995fc2f7 JK	160	if [ "$rebase" = true ]; then
	161	printf "There is no candidate for rebasing against "
	162	else
	163	printf "There are no candidates for merging "
	164	fi
	165	echo "among the refs that you just fetched."
a8c9bef4 JK	166	echo "Generally this means that you provided a wildcard refspec which had no"
	167	echo "matches on the remote end."
	168	elif [ $# -gt 0 ] && [ "$1" != "$remote" ]; then
	169	echo "You asked to pull from the remote '$1', but did not specify"
995fc2f7	170	echo "a branch. Because this is not the default configured remote"
a8c9bef4	171	echo "for your current branch, you must specify a branch on the command line."
15a147e6 MZ	172	elif [ -z "$curr_branch" -o -z "$upstream" ]; then
	173	. git-parse-remote
	174	error_on_missing_default_upstream "pull" $op_type $op_prep \
	175	"git pull <repository> <refspec>"
a6dbf881	176	else
995fc2f7 JK	177	echo "Your configuration specifies to $op_type $op_prep the ref '${upstream#refs/heads/}'"
995fc2f7 JK	178	echo "from the remote, but no such ref was fetched."
61e6108d	179	fi
441ed413 JH	180	exit 1
	181	}
	182
c85c7927	183	test true = "$rebase" && {
19a7fcbf JK	184	if ! git rev-parse -q --verify HEAD >/dev/null
	185	then
	186	# On an unborn branch
	187	if test -f "$GIT_DIR/index"
	188	then
85af5f82	189	die "$(gettext "updating an unborn branch with changes added to the index")"
19a7fcbf JK	190	fi
19a7fcbf JK	191	else
92c62a3f	192	require_clean_work_tree "pull with rebase" "Please commit or stash them."
19a7fcbf	193	fi
d44e7126	194	oldremoteref= &&
c85c7927	195	. git-parse-remote &&
d44e7126 SB	196	remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
	197	oldremoteref="$(git rev-parse -q --verify "$remoteref")" &&
	198	for reflog in $(git rev-list -g $remoteref 2>/dev/null)
	199	do
	200	if test "$reflog" = "$(git merge-base $reflog $curr_branch)"
	201	then
	202	oldremoteref="$reflog"
	203	break
	204	fi
	205	done
c85c7927	206	}
2d179857	207	orig_head=$(git rev-parse -q --verify HEAD)
7dce19d3	208	git fetch $verbosity $progress $dry_run $recurse_submodules --update-head-ok "$@" \|\| exit 1
29609e68	209	test -z "$dry_run" \|\| exit 0
b10ac50f	210
2d179857	211	curr_head=$(git rev-parse -q --verify HEAD)
b0ad11ea	212	if test -n "$orig_head" && test "$curr_head" != "$orig_head"
b10ac50f JH	213	then
	214	# The fetch involved updating the current branch.
	215
	216	# The working tree and the index file is still based on the
	217	# $orig_head commit, but we are merging into $curr_head.
	218	# First update the working tree to match $curr_head.
	219
c2b1a95c	220	eval_gettextln "Warning: fetch updated the current branch head.
3320a973	221	Warning: fast-forwarding your working tree from
c2b1a95c	222	Warning: commit \$orig_head." >&2
7bd93c1c	223	git update-index -q --refresh
5be60078	224	git read-tree -u -m "$orig_head" "$curr_head" \|\|
9f35aaa9	225	die "$(eval_gettext "Cannot fast-forward your working tree.
8323124a	226	After making sure that you saved anything precious from
9f35aaa9	227	$ git diff \$orig_head
8323124a JH	228	output, run
8323124a JH	229	$ git reset --hard
9f35aaa9	230	to recover.")"
8323124a	231
b10ac50f JH	232	fi
b10ac50f JH	233
05dd8e2e JH	234	merge_head=$(sed -e '/ not-for-merge /d' \
	235	-e 's/ .*//' "$GIT_DIR"/FETCH_HEAD \| \
	236	tr '\012' ' ')
e0bfc81e JH	237
e0bfc81e JH	238	case "$merge_head" in
521003ff	239	'')
4973aa22	240	error_on_no_merge_candidates "$@"
521003ff	241	;;
60fb5b2c	242	?' '?)
d09e79cb LT	243	if test -z "$orig_head"
d09e79cb LT	244	then
85af5f82	245	die "$(gettext "Cannot merge multiple branches into empty head")"
d09e79cb	246	fi
51b2ead0 JS	247	if test true = "$rebase"
51b2ead0 JS	248	then
85af5f82	249	die "$(gettext "Cannot rebase onto multiple branches")"
51b2ead0	250	fi
60fb5b2c JH	251	;;
	252	esac
	253
d09e79cb LT	254	if test -z "$orig_head"
d09e79cb LT	255	then
b0ad11ea	256	git update-ref -m "initial pull" HEAD $merge_head "$curr_head" &&
4b3ffe51	257	git read-tree -m -u HEAD \|\| exit 1
d09e79cb LT	258	exit
	259	fi
	260
cf65426d EN	261	if test true = "$rebase"
	262	then
	263	o=$(git show-branch --merge-base $curr_branch $merge_head $oldremoteref)
	264	if test "$oldremoteref" = "$o"
	265	then
	266	unset oldremoteref
	267	fi
	268	fi
	269
efb779f8	270	merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") \|\| exit
14e5d40c JH	271	case "$rebase" in
	272	true)
	273	eval="git-rebase $diffstat $strategy_args $merge_args"
	274	eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}"
	275	;;
	276	*)
	277	eval="git-merge $diffstat $no_commit $squash $no_ff $ff_only"
bebd2fd7 JK	278	eval="$eval $log_arg $strategy_args $merge_args $verbosity $progress"
bebd2fd7 JK	279	eval="$eval \"\$merge_name\" HEAD $merge_head"
14e5d40c JH	280	;;
	281	esac
	282	eval "exec $eval"