git-pull.sh - pub/scm/git/git - Git at Google

 #!/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.'
 SUBDIRECTORY_OK=Yes
 . git-sh-setup
 set_reflog_action "pull $*"
 require_work_tree
 cd_to_toplevel

 test -z "$(git ls-files -u)" ||
 	die "You are in the middle of a conflicted merge."

 strategy_args= no_summary= no_commit= squash=
 while :
 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 ;;
 	--summary)
 		no_summary=$1
 		;;
 	--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
 		no_commit=--no-commit ;;
 	--sq|--squ|--squa|--squas|--squash)
 		squash=--squash ;;
 	-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
 		--strateg=*|--strategy=*|\
 	-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
 		case "$#,$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 may be meant for fetch.
 		break
 		;;
 	esac
 	shift
 done

 orig_head=$(git rev-parse --verify HEAD 2>/dev/null)
 git-fetch --update-head-ok "$@" || 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 -q HEAD)
 	case $? in
 	  0) ;;
 	  1) echo >&2 "You are not currently on a branch; you must explicitly"
 	     echo >&2 "specify which branch you wish to merge:"
 	     echo >&2 "  git pull <remote> <branch>"
 	     exit 1;;
 	  *) exit $?;;
 	esac
 	curr_branch=${curr_branch#refs/heads/}

 	echo >&2 "You asked me to pull without telling me which branch you"
 	echo >&2 "want to merge with, and 'branch.${curr_branch}.merge' in"
 	echo >&2 "your configuration file does not tell me either.  Please"
 	echo >&2 "name which branch you want to merge on the command line and"
 	echo >&2 "try again (e.g. 'git pull <repository> <refspec>')."
 	echo >&2 "See git-pull(1) for details on the refspec."
 	echo >&2
 	echo >&2 "If you often merge with the same branch, you may want to"
 	echo >&2 "configure the following variables in your configuration"
 	echo >&2 "file:"
 	echo >&2
 	echo >&2 "    branch.${curr_branch}.remote = <nickname>"
 	echo >&2 "    branch.${curr_branch}.merge = <remote-ref>"
 	echo >&2 "    remote.<nickname>.url = <url>"
 	echo >&2 "    remote.<nickname>.fetch = <refspec>"
 	echo >&2
 	echo >&2 "See git-config(1) for details."
 	exit 1
 	;;
 ?*' '?*)
 	if test -z "$orig_head"
 	then
 		echo >&2 "Cannot merge multiple branches into empty head"
 		exit 1
 	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

 merge_name=$(git fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") || exit
 exec git-merge $no_summary $no_commit $squash $strategy_args \
 	"$merge_name" HEAD $merge_head
	#!/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.'
	SUBDIRECTORY_OK=Yes
	. git-sh-setup
	set_reflog_action "pull $*"
	require_work_tree
	cd_to_toplevel

	test -z "$(git ls-files -u)" \|\|
	die "You are in the middle of a conflicted merge."

	strategy_args= no_summary= no_commit= squash=
	while :
	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 ;;
	--summary)
	no_summary=$1
	;;
	--no-c\|--no-co\|--no-com\|--no-comm\|--no-commi\|--no-commit)
	no_commit=--no-commit ;;
	--sq\|--squ\|--squa\|--squas\|--squash)
	squash=--squash ;;
	-s=\|--s=\|--st=\|--str=\|--stra=\|--strat=\|--strate=*\|\
	--strateg=\|--strategy=\|\
	-s\|--s\|--st\|--str\|--stra\|--strat\|--strate\|--strateg\|--strategy)
	case "$#,$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 may be meant for fetch.
	break
	;;
	esac
	shift
	done

	orig_head=$(git rev-parse --verify HEAD 2>/dev/null)
	git-fetch --update-head-ok "$@" \|\| 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 -q HEAD)
	case $? in
	0) ;;
	1) echo >&2 "You are not currently on a branch; you must explicitly"
	echo >&2 "specify which branch you wish to merge:"
	echo >&2 " git pull <remote> <branch>"
	exit 1;;
	*) exit $?;;
	esac
	curr_branch=${curr_branch#refs/heads/}

	echo >&2 "You asked me to pull without telling me which branch you"
	echo >&2 "want to merge with, and 'branch.${curr_branch}.merge' in"
	echo >&2 "your configuration file does not tell me either. Please"
	echo >&2 "name which branch you want to merge on the command line and"
	echo >&2 "try again (e.g. 'git pull <repository> <refspec>')."
	echo >&2 "See git-pull(1) for details on the refspec."
	echo >&2
	echo >&2 "If you often merge with the same branch, you may want to"
	echo >&2 "configure the following variables in your configuration"
	echo >&2 "file:"
	echo >&2
	echo >&2 " branch.${curr_branch}.remote = <nickname>"
	echo >&2 " branch.${curr_branch}.merge = <remote-ref>"
	echo >&2 " remote.<nickname>.url = <url>"
	echo >&2 " remote.<nickname>.fetch = <refspec>"
	echo >&2
	echo >&2 "See git-config(1) for details."
	exit 1
	;;
	?' '?)
	if test -z "$orig_head"
	then
	echo >&2 "Cannot merge multiple branches into empty head"
	exit 1
	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

	merge_name=$(git fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") \|\| exit
	exec git-merge $no_summary $no_commit $squash $strategy_args \
	"$merge_name" HEAD $merge_head