git-mergetool.sh - jrn/git - Git at Google

 #!/bin/sh
 #
 # This program resolves merge conflicts in git
 #
 # Copyright (c) 2006 Theodore Y. Ts'o
 # Copyright (c) 2009-2016 David Aguilar
 #
 # This file is licensed under the GPL v2, or a later version
 # at the discretion of Junio C Hamano.
 #

 USAGE='[--tool=tool] [--tool-help] [-y|--no-prompt|--prompt] [-g|--gui|--no-gui] [-O<orderfile>] [file to merge] ...'
 SUBDIRECTORY_OK=Yes
 NONGIT_OK=Yes
 OPTIONS_SPEC=
 TOOL_MODE=merge
 . git-sh-setup
 . git-mergetool--lib

 # Returns true if the mode reflects a symlink
 is_symlink () {
 	test "$1" = 120000
 }

 is_submodule () {
 	test "$1" = 160000
 }

 local_present () {
 	test -n "$local_mode"
 }

 remote_present () {
 	test -n "$remote_mode"
 }

 base_present () {
 	test -n "$base_mode"
 }

 mergetool_tmpdir_init () {
 	if test "$(git config --bool mergetool.writeToTemp)" != true
 	then
 		MERGETOOL_TMPDIR=.
 		return 0
 	fi
 	if MERGETOOL_TMPDIR=$(mktemp -d -t "git-mergetool-XXXXXX" 2>/dev/null)
 	then
 		return 0
 	fi
 	die "error: mktemp is needed when 'mergetool.writeToTemp' is true"
 }

 cleanup_temp_files () {
 	if test "$1" = --save-backup
 	then
 		rm -rf -- "$MERGED.orig"
 		test -e "$BACKUP" && mv -- "$BACKUP" "$MERGED.orig"
 		rm -f -- "$LOCAL" "$REMOTE" "$BASE"
 	else
 		rm -f -- "$LOCAL" "$REMOTE" "$BASE" "$BACKUP"
 	fi
 	if test "$MERGETOOL_TMPDIR" != "."
 	then
 		rmdir "$MERGETOOL_TMPDIR"
 	fi
 }

 describe_file () {
 	mode="$1"
 	branch="$2"
 	file="$3"

 	printf "  {%s}: " "$branch"
 	if test -z "$mode"
 	then
 		echo "deleted"
 	elif is_symlink "$mode"
 	then
 		echo "a symbolic link -> '$(cat "$file")'"
 	elif is_submodule "$mode"
 	then
 		echo "submodule commit $file"
 	elif base_present
 	then
 		echo "modified file"
 	else
 		echo "created file"
 	fi
 }

 resolve_symlink_merge () {
 	while true
 	do
 		printf "Use (l)ocal or (r)emote, or (a)bort? "
 		read ans || return 1
 		case "$ans" in
 		[lL]*)
 			git checkout-index -f --stage=2 -- "$MERGED"
 			git add -- "$MERGED"
 			cleanup_temp_files --save-backup
 			return 0
 			;;
 		[rR]*)
 			git checkout-index -f --stage=3 -- "$MERGED"
 			git add -- "$MERGED"
 			cleanup_temp_files --save-backup
 			return 0
 			;;
 		[aA]*)
 			return 1
 			;;
 		esac
 	done
 }

 resolve_deleted_merge () {
 	while true
 	do
 		if base_present
 		then
 			printf "Use (m)odified or (d)eleted file, or (a)bort? "
 		else
 			printf "Use (c)reated or (d)eleted file, or (a)bort? "
 		fi
 		read ans || return 1
 		case "$ans" in
 		[mMcC]*)
 			git add -- "$MERGED"
 			if test "$merge_keep_backup" = "true"
 			then
 				cleanup_temp_files --save-backup
 			else
 				cleanup_temp_files
 			fi
 			return 0
 			;;
 		[dD]*)
 			git rm -- "$MERGED" > /dev/null
 			cleanup_temp_files
 			return 0
 			;;
 		[aA]*)
 			if test "$merge_keep_temporaries" = "false"
 			then
 				cleanup_temp_files
 			fi
 			return 1
 			;;
 		esac
 	done
 }

 resolve_submodule_merge () {
 	while true
 	do
 		printf "Use (l)ocal or (r)emote, or (a)bort? "
 		read ans || return 1
 		case "$ans" in
 		[lL]*)
 			if ! local_present
 			then
 				if test -n "$(git ls-tree HEAD -- "$MERGED")"
 				then
 					# Local isn't present, but it's a subdirectory
 					git ls-tree --full-name -r HEAD -- "$MERGED" |
 					git update-index --index-info || exit $?
 				else
 					test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
 					git update-index --force-remove "$MERGED"
 					cleanup_temp_files --save-backup
 				fi
 			elif is_submodule "$local_mode"
 			then
 				stage_submodule "$MERGED" "$local_sha1"
 			else
 				git checkout-index -f --stage=2 -- "$MERGED"
 				git add -- "$MERGED"
 			fi
 			return 0
 			;;
 		[rR]*)
 			if ! remote_present
 			then
 				if test -n "$(git ls-tree MERGE_HEAD -- "$MERGED")"
 				then
 					# Remote isn't present, but it's a subdirectory
 					git ls-tree --full-name -r MERGE_HEAD -- "$MERGED" |
 					git update-index --index-info || exit $?
 				else
 					test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
 					git update-index --force-remove "$MERGED"
 				fi
 			elif is_submodule "$remote_mode"
 			then
 				! is_submodule "$local_mode" &&
 				test -e "$MERGED" &&
 				mv -- "$MERGED" "$BACKUP"
 				stage_submodule "$MERGED" "$remote_sha1"
 			else
 				test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
 				git checkout-index -f --stage=3 -- "$MERGED"
 				git add -- "$MERGED"
 			fi
 			cleanup_temp_files --save-backup
 			return 0
 			;;
 		[aA]*)
 			return 1
 			;;
 		esac
 	done
 }

 stage_submodule () {
 	path="$1"
 	submodule_sha1="$2"
 	mkdir -p "$path" ||
 	die "fatal: unable to create directory for module at $path"
 	# Find $path relative to work tree
 	work_tree_root=$(cd_to_toplevel && pwd)
 	work_rel_path=$(cd "$path" &&
 		GIT_WORK_TREE="${work_tree_root}" git rev-parse --show-prefix
 	)
 	test -n "$work_rel_path" ||
 	die "fatal: unable to get path of module $path relative to work tree"
 	git update-index --add --replace --cacheinfo 160000 "$submodule_sha1" "${work_rel_path%/}" || die
 }

 checkout_staged_file () {
 	tmpfile="$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" &&
 	tmpfile=${tmpfile%%'	'*}

 	if test $? -eq 0 && test -n "$tmpfile"
 	then
 		mv -- "$(git rev-parse --show-cdup)$tmpfile" "$3"
 	else
 		>"$3"
 	fi
 }

 merge_file () {
 	MERGED="$1"

 	f=$(git ls-files -u -- "$MERGED")
 	if test -z "$f"
 	then
 		if test ! -f "$MERGED"
 		then
 			echo "$MERGED: file not found"
 		else
 			echo "$MERGED: file does not need merging"
 		fi
 		return 1
 	fi

 	# extract file extension from the last path component
 	case "${MERGED##*/}" in
 	*.*)
 		ext=.${MERGED##*.}
 		BASE=${MERGED%"$ext"}
 		;;
 	*)
 		BASE=$MERGED
 		ext=
 	esac

 	mergetool_tmpdir_init

 	if test "$MERGETOOL_TMPDIR" != "."
 	then
 		# If we're using a temporary directory then write to the
 		# top-level of that directory.
 		BASE=${BASE##*/}
 	fi

 	BACKUP="$MERGETOOL_TMPDIR/${BASE}_BACKUP_$$$ext"
 	LOCAL="$MERGETOOL_TMPDIR/${BASE}_LOCAL_$$$ext"
 	REMOTE="$MERGETOOL_TMPDIR/${BASE}_REMOTE_$$$ext"
 	BASE="$MERGETOOL_TMPDIR/${BASE}_BASE_$$$ext"

 	base_mode= local_mode= remote_mode=

 	# here, $IFS is just a LF
 	for line in $f
 	do
 		mode=${line%% *}		# 1st word
 		sha1=${line#"$mode "}
 		sha1=${sha1%% *}		# 2nd word
 		case "${line#$mode $sha1 }" in	# remainder
 		'1	'*)
 			base_mode=$mode
 			;;
 		'2	'*)
 			local_mode=$mode local_sha1=$sha1
 			;;
 		'3	'*)
 			remote_mode=$mode remote_sha1=$sha1
 			;;
 		esac
 	done

 	if is_submodule "$local_mode" || is_submodule "$remote_mode"
 	then
 		echo "Submodule merge conflict for '$MERGED':"
 		describe_file "$local_mode" "local" "$local_sha1"
 		describe_file "$remote_mode" "remote" "$remote_sha1"
 		resolve_submodule_merge
 		return
 	fi

 	if test -f "$MERGED"
 	then
 		mv -- "$MERGED" "$BACKUP"
 		cp -- "$BACKUP" "$MERGED"
 	fi
 	# Create a parent directory to handle delete/delete conflicts
 	# where the base's directory no longer exists.
 	mkdir -p "$(dirname "$MERGED")"

 	checkout_staged_file 1 "$MERGED" "$BASE"
 	checkout_staged_file 2 "$MERGED" "$LOCAL"
 	checkout_staged_file 3 "$MERGED" "$REMOTE"

 	if test -z "$local_mode" || test -z "$remote_mode"
 	then
 		echo "Deleted merge conflict for '$MERGED':"
 		describe_file "$local_mode" "local" "$LOCAL"
 		describe_file "$remote_mode" "remote" "$REMOTE"
 		resolve_deleted_merge
 		status=$?
 		rmdir -p "$(dirname "$MERGED")" 2>/dev/null
 		return $status
 	fi

 	if is_symlink "$local_mode" || is_symlink "$remote_mode"
 	then
 		echo "Symbolic link merge conflict for '$MERGED':"
 		describe_file "$local_mode" "local" "$LOCAL"
 		describe_file "$remote_mode" "remote" "$REMOTE"
 		resolve_symlink_merge
 		return
 	fi

 	echo "Normal merge conflict for '$MERGED':"
 	describe_file "$local_mode" "local" "$LOCAL"
 	describe_file "$remote_mode" "remote" "$REMOTE"
 	if test "$guessed_merge_tool" = true || test "$prompt" = true
 	then
 		printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
 		read ans || return 1
 	fi

 	if base_present
 	then
 		present=true
 	else
 		present=false
 	fi

 	if ! run_merge_tool "$merge_tool" "$present"
 	then
 		echo "merge of $MERGED failed" 1>&2
 		mv -- "$BACKUP" "$MERGED"

 		if test "$merge_keep_temporaries" = "false"
 		then
 			cleanup_temp_files
 		fi

 		return 1
 	fi

 	if test "$merge_keep_backup" = "true"
 	then
 		mv -- "$BACKUP" "$MERGED.orig"
 	else
 		rm -- "$BACKUP"
 	fi

 	git add -- "$MERGED"
 	cleanup_temp_files
 	return 0
 }

 prompt_after_failed_merge () {
 	while true
 	do
 		printf "Continue merging other unresolved paths [y/n]? "
 		read ans || return 1
 		case "$ans" in
 		[yY]*)
 			return 0
 			;;
 		[nN]*)
 			return 1
 			;;
 		esac
 	done
 }

 print_noop_and_exit () {
 	echo "No files need merging"
 	exit 0
 }

 main () {
 	prompt=$(git config --bool mergetool.prompt)
 	GIT_MERGETOOL_GUI=false
 	guessed_merge_tool=false
 	orderfile=

 	while test $# != 0
 	do
 		case "$1" in
 		--tool-help=*)
 			TOOL_MODE=${1#--tool-help=}
 			show_tool_help
 			;;
 		--tool-help)
 			show_tool_help
 			;;
 		-t|--tool*)
 			case "$#,$1" in
 			*,*=*)
 				merge_tool=${1#*=}
 				;;
 			1,*)
 				usage ;;
 			*)
 				merge_tool="$2"
 				shift ;;
 			esac
 			;;
 		--no-gui)
 			GIT_MERGETOOL_GUI=false
 			;;
 		-g|--gui)
 			GIT_MERGETOOL_GUI=true
 			;;
 		-y|--no-prompt)
 			prompt=false
 			;;
 		--prompt)
 			prompt=true
 			;;
 		-O*)
 			orderfile="${1#-O}"
 			;;
 		--)
 			shift
 			break
 			;;
 		-*)
 			usage
 			;;
 		*)
 			break
 			;;
 		esac
 		shift
 	done

 	git_dir_init
 	require_work_tree

 	if test -z "$merge_tool"
 	then
 		if ! merge_tool=$(get_merge_tool)
 		then
 			guessed_merge_tool=true
 		fi
 	fi
 	merge_keep_backup="$(git config --bool mergetool.keepBackup || echo true)"
 	merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)"

 	prefix=$(git rev-parse --show-prefix) || exit 1
 	cd_to_toplevel

 	if test -n "$orderfile"
 	then
 		orderfile=$(
 			git rev-parse --prefix "$prefix" -- "$orderfile" |
 			sed -e 1d
 		)
 	fi

 	if test $# -eq 0 && test -e "$GIT_DIR/MERGE_RR"
 	then
 		set -- $(git rerere remaining)
 		if test $# -eq 0
 		then
 			print_noop_and_exit
 		fi
 	elif test $# -ge 0
 	then
 		# rev-parse provides the -- needed for 'set'
 		eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"
 	fi

 	files=$(git -c core.quotePath=false \
 		diff --name-only --diff-filter=U \
 		${orderfile:+"-O$orderfile"} -- "$@")

 	if test -z "$files"
 	then
 		print_noop_and_exit
 	fi

 	printf "Merging:\n"
 	printf "%s\n" "$files"

 	rc=0
 	set -- $files
 	while test $# -ne 0
 	do
 		printf "\n"
 		if ! merge_file "$1"
 		then
 			rc=1
 			test $# -ne 1 && prompt_after_failed_merge || exit 1
 		fi
 		shift
 	done

 	exit $rc
 }

 main "$@"
	#!/bin/sh
	#
	# This program resolves merge conflicts in git
	#
	# Copyright (c) 2006 Theodore Y. Ts'o
	# Copyright (c) 2009-2016 David Aguilar
	#
	# This file is licensed under the GPL v2, or a later version
	# at the discretion of Junio C Hamano.
	#

	USAGE='[--tool=tool] [--tool-help] [-y\|--no-prompt\|--prompt] [-g\|--gui\|--no-gui] [-O<orderfile>] [file to merge] ...'
	SUBDIRECTORY_OK=Yes
	NONGIT_OK=Yes
	OPTIONS_SPEC=
	TOOL_MODE=merge
	. git-sh-setup
	. git-mergetool--lib

	# Returns true if the mode reflects a symlink
	is_symlink () {
	test "$1" = 120000
	}

	is_submodule () {
	test "$1" = 160000
	}

	local_present () {
	test -n "$local_mode"
	}

	remote_present () {
	test -n "$remote_mode"
	}

	base_present () {
	test -n "$base_mode"
	}

	mergetool_tmpdir_init () {
	if test "$(git config --bool mergetool.writeToTemp)" != true
	then
	MERGETOOL_TMPDIR=.
	return 0
	fi
	if MERGETOOL_TMPDIR=$(mktemp -d -t "git-mergetool-XXXXXX" 2>/dev/null)
	then
	return 0
	fi
	die "error: mktemp is needed when 'mergetool.writeToTemp' is true"
	}

	cleanup_temp_files () {
	if test "$1" = --save-backup
	then
	rm -rf -- "$MERGED.orig"
	test -e "$BACKUP" && mv -- "$BACKUP" "$MERGED.orig"
	rm -f -- "$LOCAL" "$REMOTE" "$BASE"
	else
	rm -f -- "$LOCAL" "$REMOTE" "$BASE" "$BACKUP"
	fi
	if test "$MERGETOOL_TMPDIR" != "."
	then
	rmdir "$MERGETOOL_TMPDIR"
	fi
	}

	describe_file () {
	mode="$1"
	branch="$2"
	file="$3"

	printf " {%s}: " "$branch"
	if test -z "$mode"
	then
	echo "deleted"
	elif is_symlink "$mode"
	then
	echo "a symbolic link -> '$(cat "$file")'"
	elif is_submodule "$mode"
	then
	echo "submodule commit $file"
	elif base_present
	then
	echo "modified file"
	else
	echo "created file"
	fi
	}

	resolve_symlink_merge () {
	while true
	do
	printf "Use (l)ocal or (r)emote, or (a)bort? "
	read ans \|\| return 1
	case "$ans" in
	[lL]*)
	git checkout-index -f --stage=2 -- "$MERGED"
	git add -- "$MERGED"
	cleanup_temp_files --save-backup
	return 0
	;;
	[rR]*)
	git checkout-index -f --stage=3 -- "$MERGED"
	git add -- "$MERGED"
	cleanup_temp_files --save-backup
	return 0
	;;
	[aA]*)
	return 1
	;;
	esac
	done
	}

	resolve_deleted_merge () {
	while true
	do
	if base_present
	then
	printf "Use (m)odified or (d)eleted file, or (a)bort? "
	else
	printf "Use (c)reated or (d)eleted file, or (a)bort? "
	fi
	read ans \|\| return 1
	case "$ans" in
	[mMcC]*)
	git add -- "$MERGED"
	if test "$merge_keep_backup" = "true"
	then
	cleanup_temp_files --save-backup
	else
	cleanup_temp_files
	fi
	return 0
	;;
	[dD]*)
	git rm -- "$MERGED" > /dev/null
	cleanup_temp_files
	return 0
	;;
	[aA]*)
	if test "$merge_keep_temporaries" = "false"
	then
	cleanup_temp_files
	fi
	return 1
	;;
	esac
	done
	}

	resolve_submodule_merge () {
	while true
	do
	printf "Use (l)ocal or (r)emote, or (a)bort? "
	read ans \|\| return 1
	case "$ans" in
	[lL]*)
	if ! local_present
	then
	if test -n "$(git ls-tree HEAD -- "$MERGED")"
	then
	# Local isn't present, but it's a subdirectory
	git ls-tree --full-name -r HEAD -- "$MERGED" \|
	git update-index --index-info \|\| exit $?
	else
	test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
	git update-index --force-remove "$MERGED"
	cleanup_temp_files --save-backup
	fi
	elif is_submodule "$local_mode"
	then
	stage_submodule "$MERGED" "$local_sha1"
	else
	git checkout-index -f --stage=2 -- "$MERGED"
	git add -- "$MERGED"
	fi
	return 0
	;;
	[rR]*)
	if ! remote_present
	then
	if test -n "$(git ls-tree MERGE_HEAD -- "$MERGED")"
	then
	# Remote isn't present, but it's a subdirectory
	git ls-tree --full-name -r MERGE_HEAD -- "$MERGED" \|
	git update-index --index-info \|\| exit $?
	else
	test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
	git update-index --force-remove "$MERGED"
	fi
	elif is_submodule "$remote_mode"
	then
	! is_submodule "$local_mode" &&
	test -e "$MERGED" &&
	mv -- "$MERGED" "$BACKUP"
	stage_submodule "$MERGED" "$remote_sha1"
	else
	test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
	git checkout-index -f --stage=3 -- "$MERGED"
	git add -- "$MERGED"
	fi
	cleanup_temp_files --save-backup
	return 0
	;;
	[aA]*)
	return 1
	;;
	esac
	done
	}

	stage_submodule () {
	path="$1"
	submodule_sha1="$2"
	mkdir -p "$path" \|\|
	die "fatal: unable to create directory for module at $path"
	# Find $path relative to work tree
	work_tree_root=$(cd_to_toplevel && pwd)
	work_rel_path=$(cd "$path" &&
	GIT_WORK_TREE="${work_tree_root}" git rev-parse --show-prefix
	)
	test -n "$work_rel_path" \|\|
	die "fatal: unable to get path of module $path relative to work tree"
	git update-index --add --replace --cacheinfo 160000 "$submodule_sha1" "${work_rel_path%/}" \|\| die
	}

	checkout_staged_file () {
	tmpfile="$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" &&
	tmpfile=${tmpfile%%' '*}

	if test $? -eq 0 && test -n "$tmpfile"
	then
	mv -- "$(git rev-parse --show-cdup)$tmpfile" "$3"
	else
	>"$3"
	fi
	}

	merge_file () {
	MERGED="$1"

	f=$(git ls-files -u -- "$MERGED")
	if test -z "$f"
	then
	if test ! -f "$MERGED"
	then
	echo "$MERGED: file not found"
	else
	echo "$MERGED: file does not need merging"
	fi
	return 1
	fi

	# extract file extension from the last path component
	case "${MERGED##*/}" in
	.)
	ext=.${MERGED##*.}
	BASE=${MERGED%"$ext"}
	;;
	*)
	BASE=$MERGED
	ext=
	esac

	mergetool_tmpdir_init

	if test "$MERGETOOL_TMPDIR" != "."
	then
	# If we're using a temporary directory then write to the
	# top-level of that directory.
	BASE=${BASE##*/}
	fi

	BACKUP="$MERGETOOL_TMPDIR/${BASE}_BACKUP_$$$ext"
	LOCAL="$MERGETOOL_TMPDIR/${BASE}_LOCAL_$$$ext"
	REMOTE="$MERGETOOL_TMPDIR/${BASE}_REMOTE_$$$ext"
	BASE="$MERGETOOL_TMPDIR/${BASE}_BASE_$$$ext"

	base_mode= local_mode= remote_mode=

	# here, $IFS is just a LF
	for line in $f
	do
	mode=${line%% *} # 1st word
	sha1=${line#"$mode "}
	sha1=${sha1%% *} # 2nd word
	case "${line#$mode $sha1 }" in # remainder
	'1 '*)
	base_mode=$mode
	;;
	'2 '*)
	local_mode=$mode local_sha1=$sha1
	;;
	'3 '*)
	remote_mode=$mode remote_sha1=$sha1
	;;
	esac
	done

	if is_submodule "$local_mode" \|\| is_submodule "$remote_mode"
	then
	echo "Submodule merge conflict for '$MERGED':"
	describe_file "$local_mode" "local" "$local_sha1"
	describe_file "$remote_mode" "remote" "$remote_sha1"
	resolve_submodule_merge
	return
	fi

	if test -f "$MERGED"
	then
	mv -- "$MERGED" "$BACKUP"
	cp -- "$BACKUP" "$MERGED"
	fi
	# Create a parent directory to handle delete/delete conflicts
	# where the base's directory no longer exists.
	mkdir -p "$(dirname "$MERGED")"

	checkout_staged_file 1 "$MERGED" "$BASE"
	checkout_staged_file 2 "$MERGED" "$LOCAL"
	checkout_staged_file 3 "$MERGED" "$REMOTE"

	if test -z "$local_mode" \|\| test -z "$remote_mode"
	then
	echo "Deleted merge conflict for '$MERGED':"
	describe_file "$local_mode" "local" "$LOCAL"
	describe_file "$remote_mode" "remote" "$REMOTE"
	resolve_deleted_merge
	status=$?
	rmdir -p "$(dirname "$MERGED")" 2>/dev/null
	return $status
	fi

	if is_symlink "$local_mode" \|\| is_symlink "$remote_mode"
	then
	echo "Symbolic link merge conflict for '$MERGED':"
	describe_file "$local_mode" "local" "$LOCAL"
	describe_file "$remote_mode" "remote" "$REMOTE"
	resolve_symlink_merge
	return
	fi

	echo "Normal merge conflict for '$MERGED':"
	describe_file "$local_mode" "local" "$LOCAL"
	describe_file "$remote_mode" "remote" "$REMOTE"
	if test "$guessed_merge_tool" = true \|\| test "$prompt" = true
	then
	printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
	read ans \|\| return 1
	fi

	if base_present
	then
	present=true
	else
	present=false
	fi

	if ! run_merge_tool "$merge_tool" "$present"
	then
	echo "merge of $MERGED failed" 1>&2
	mv -- "$BACKUP" "$MERGED"

	if test "$merge_keep_temporaries" = "false"
	then
	cleanup_temp_files
	fi

	return 1
	fi

	if test "$merge_keep_backup" = "true"
	then
	mv -- "$BACKUP" "$MERGED.orig"
	else
	rm -- "$BACKUP"
	fi

	git add -- "$MERGED"
	cleanup_temp_files
	return 0
	}

	prompt_after_failed_merge () {
	while true
	do
	printf "Continue merging other unresolved paths [y/n]? "
	read ans \|\| return 1
	case "$ans" in
	[yY]*)
	return 0
	;;
	[nN]*)
	return 1
	;;
	esac
	done
	}

	print_noop_and_exit () {
	echo "No files need merging"
	exit 0
	}

	main () {
	prompt=$(git config --bool mergetool.prompt)
	GIT_MERGETOOL_GUI=false
	guessed_merge_tool=false
	orderfile=

	while test $# != 0
	do
	case "$1" in
	--tool-help=*)
	TOOL_MODE=${1#--tool-help=}
	show_tool_help
	;;
	--tool-help)
	show_tool_help
	;;
	-t\|--tool*)
	case "$#,$1" in
	,=*)
	merge_tool=${1#*=}
	;;
	1,*)
	usage ;;
	*)
	merge_tool="$2"
	shift ;;
	esac
	;;
	--no-gui)
	GIT_MERGETOOL_GUI=false
	;;
	-g\|--gui)
	GIT_MERGETOOL_GUI=true
	;;
	-y\|--no-prompt)
	prompt=false
	;;
	--prompt)
	prompt=true
	;;
	-O*)
	orderfile="${1#-O}"
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	git_dir_init
	require_work_tree

	if test -z "$merge_tool"
	then
	if ! merge_tool=$(get_merge_tool)
	then
	guessed_merge_tool=true
	fi
	fi
	merge_keep_backup="$(git config --bool mergetool.keepBackup \|\| echo true)"
	merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries \|\| echo false)"

	prefix=$(git rev-parse --show-prefix) \|\| exit 1
	cd_to_toplevel

	if test -n "$orderfile"
	then
	orderfile=$(
	git rev-parse --prefix "$prefix" -- "$orderfile" \|
	sed -e 1d
	)
	fi

	if test $# -eq 0 && test -e "$GIT_DIR/MERGE_RR"
	then
	set -- $(git rerere remaining)
	if test $# -eq 0
	then
	print_noop_and_exit
	fi
	elif test $# -ge 0
	then
	# rev-parse provides the -- needed for 'set'
	eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"
	fi

	files=$(git -c core.quotePath=false \
	diff --name-only --diff-filter=U \
	${orderfile:+"-O$orderfile"} -- "$@")

	if test -z "$files"
	then
	print_noop_and_exit
	fi

	printf "Merging:\n"
	printf "%s\n" "$files"

	rc=0
	set -- $files
	while test $# -ne 0
	do
	printf "\n"
	if ! merge_file "$1"
	then
	rc=1
	test $# -ne 1 && prompt_after_failed_merge \|\| exit 1
	fi
	shift
	done

	exit $rc
	}

	main "$@"