[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-summary] [--no-commit] [-s strategy]... [<fetch-options>] <repo> <head>...'
LONG_USAGE='Fetch one or more remote refs and merge it/them into the current HEAD.'
. git-sh-setup

strategy_args= no_summary= no_commit= squash=
while case "$#,$1" in 0) break ;; *,-*) ;; *) break ;; esac
do
	case "$1" in
	-n|--n|--no|--no-|--no-s|--no-su|--no-sum|--no-summ|\
		--no-summa|--no-summar|--no-summary)
		no_summary=-n ;;
	--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
		no_commit=--no-commit ;;
	--sq|--squ|--squa|--squas|--squash)
		squash=--squash ;;
	-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
		--strateg=*|--strategy=*|\
	-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
		case "$#,$1" in
		*,*=*)
			strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;;
		1,*)
			usage ;;
		*)
			strategy="$2"
			shift ;;
		esac
		strategy_args="${strategy_args}-s $strategy "
		;;
	-h|--h|--he|--hel|--help)
		usage
		;;
	-*)
		# Pass thru anything that is meant for fetch.
		break
		;;
	esac
	shift
done

orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
git-fetch --update-head-ok --reflog-action=pull "$@" || exit 1

curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
if test "$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.

	echo >&2 "Warning: fetch updated the current branch head."
	echo >&2 "Warning: fast forwarding your working tree from"
	echo >&2 "Warning: commit $orig_head."
	git-update-index --refresh 2>/dev/null
	git-read-tree -u -m "$orig_head" "$curr_head" ||
		die '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 "$merge_head" in
'')
	curr_branch=$(git-symbolic-ref HEAD | \
		sed -e 's|^refs/heads/||')
	echo >&2 "Warning: No merge candidate found because value of config option
         \"branch.${curr_branch}.merge\" does not match any remote branch fetched."
	echo >&2 "No changes."
	exit 0
	;;
?*' '?*)
	if test -z "$orig_head"
	then
		echo >&2 "Cannot merge multiple branches into empty head"
		exit 1
	fi
	var=`git-repo-config --get pull.octopus`
	if test -n "$var"
	then
		strategy_default_args="-s $var"
	fi
	;;
*)
	var=`git-repo-config --get pull.twohead`
	if test -n "$var"
        then
		strategy_default_args="-s $var"
	fi
	;;
esac

if test -z "$orig_head"
then
	git-update-ref -m "initial pull" HEAD $merge_head "" &&
	git-read-tree --reset -u HEAD || exit 1
	exit
fi

case "$strategy_args" in
'')
	strategy_args=$strategy_default_args
	;;
esac

merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") || exit
git-merge "--reflog-action=pull $*" \
	$no_summary $no_commit $squash $strategy_args \
	"$merge_name" HEAD $merge_head
Commit	Line	Data
839a7a06 LT	1	#!/bin/sh
839a7a06 LT	2	#
521003ff JH	3	# Copyright (c) 2005 Junio C Hamano
	4	#
	5	# Fetch one or more remote refs and merge it/them into the current HEAD.
	6
806f36d4 FK	7	USAGE='[-n \| --no-summary] [--no-commit] [-s strategy]... [<fetch-options>] <repo> <head>...'
806f36d4 FK	8	LONG_USAGE='Fetch one or more remote refs and merge it/them into the current HEAD.'
ae2b0f15	9	. git-sh-setup
b10ac50f	10
7d0c6887	11	strategy_args= no_summary= no_commit= squash=
60fb5b2c JH	12	while case "$#,$1" in 0) break ;; ,-) ;; *) break ;; esac
	13	do
	14	case "$1" in
	15	-n\|--n\|--no\|--no-\|--no-s\|--no-su\|--no-sum\|--no-summ\|\
	16	--no-summa\|--no-summar\|--no-summary)
	17	no_summary=-n ;;
123ee3ca JH	18	--no-c\|--no-co\|--no-com\|--no-comm\|--no-commi\|--no-commit)
123ee3ca JH	19	no_commit=--no-commit ;;
7d0c6887 JH	20	--sq\|--squ\|--squa\|--squas\|--squash)
7d0c6887 JH	21	squash=--squash ;;
60fb5b2c JH	22	-s=\|--s=\|--st=\|--str=\|--stra=\|--strat=\|--strate=*\|\
	23	--strateg=\|--strategy=\|\
	24	-s\|--s\|--st\|--str\|--stra\|--strat\|--strate\|--strateg\|--strategy)
	25	case "$#,$1" in
	26	,=*)
8096fae7	27	strategy=`expr "z$1" : 'z-[^=]=\(.\)'` ;;
60fb5b2c JH	28	1,*)
	29	usage ;;
	30	*)
	31	strategy="$2"
	32	shift ;;
	33	esac
	34	strategy_args="${strategy_args}-s $strategy "
	35	;;
93d69d86 JL	36	-h\|--h\|--he\|--hel\|--help)
	37	usage
	38	;;
60fb5b2c	39	-*)
619e5a0e JH	40	# Pass thru anything that is meant for fetch.
619e5a0e JH	41	break
60fb5b2c JH	42	;;
	43	esac
	44	shift
	45	done
	46
d09e79cb	47	orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
55b7835e	48	git-fetch --update-head-ok --reflog-action=pull "$@" \|\| exit 1
b10ac50f	49
d09e79cb	50	curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
b10ac50f JH	51	if test "$curr_head" != "$orig_head"
	52	then
	53	# The fetch involved updating the current branch.
	54
	55	# The working tree and the index file is still based on the
	56	# $orig_head commit, but we are merging into $curr_head.
	57	# First update the working tree to match $curr_head.
	58
	59	echo >&2 "Warning: fetch updated the current branch head."
cf46e7b8	60	echo >&2 "Warning: fast forwarding your working tree from"
a057f806	61	echo >&2 "Warning: commit $orig_head."
cf46e7b8	62	git-update-index --refresh 2>/dev/null
b10ac50f	63	git-read-tree -u -m "$orig_head" "$curr_head" \|\|
8323124a JH	64	die 'Cannot fast-forward your working tree.
	65	After making sure that you saved anything precious from
	66	$ git diff '$orig_head'
	67	output, run
	68	$ git reset --hard
	69	to recover.'
	70
b10ac50f JH	71	fi
b10ac50f JH	72
05dd8e2e JH	73	merge_head=$(sed -e '/ not-for-merge /d' \
	74	-e 's/ .*//' "$GIT_DIR"/FETCH_HEAD \| \
	75	tr '\012' ' ')
e0bfc81e JH	76
e0bfc81e JH	77	case "$merge_head" in
521003ff	78	'')
4363dfbe JW	79	curr_branch=$(git-symbolic-ref HEAD \| \
	80	sed -e 's\|^refs/heads/\|\|')
	81	echo >&2 "Warning: No merge candidate found because value of config option
	82	\"branch.${curr_branch}.merge\" does not match any remote branch fetched."
521003ff JH	83	echo >&2 "No changes."
	84	exit 0
	85	;;
60fb5b2c	86	?' '?)
d09e79cb LT	87	if test -z "$orig_head"
	88	then
	89	echo >&2 "Cannot merge multiple branches into empty head"
	90	exit 1
	91	fi
f5ef535f	92	var=`git-repo-config --get pull.octopus`
c8e2db00	93	if test -n "$var"
a1c29295	94	then
4890f62b	95	strategy_default_args="-s $var"
a1c29295	96	fi
60fb5b2c JH	97	;;
60fb5b2c JH	98	*)
f5ef535f	99	var=`git-repo-config --get pull.twohead`
c8e2db00 MH	100	if test -n "$var"
c8e2db00 MH	101	then
4890f62b	102	strategy_default_args="-s $var"
a1c29295	103	fi
60fb5b2c JH	104	;;
	105	esac
	106
d09e79cb LT	107	if test -z "$orig_head"
	108	then
	109	git-update-ref -m "initial pull" HEAD $merge_head "" &&
	110	git-read-tree --reset -u HEAD \|\| exit 1
	111	exit
	112	fi
	113
60fb5b2c JH	114	case "$strategy_args" in
	115	'')
	116	strategy_args=$strategy_default_args
acfadcfb	117	;;
e0bfc81e JH	118	esac
e0bfc81e JH	119
86378b32	120	merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") \|\| exit
e1447e38 SP	121	git-merge "--reflog-action=pull $*" \
e1447e38 SP	122	$no_summary $no_commit $squash $strategy_args \
7d0c6887	123	"$merge_name" HEAD $merge_head