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

 #!/bin/sh
 #
 # This program resolves merge conflicts in git
 #
 # Copyright (c) 2006 Theodore Y. Ts'o
 #
 # 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] [file to merge] ...'
 SUBDIRECTORY_OK=Yes
 OPTIONS_SPEC=
 TOOL_MODE=merge
 . git-sh-setup
 . git-mergetool--lib
 require_work_tree

 # 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"
 }

 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
 }

 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"
 			cleanup_temp_files --save-backup
 			return 0
 			;;
 		[dD]*)
 			git rm -- "$MERGED" > /dev/null
 			cleanup_temp_files
 			return 0
 			;;
 		[aA]*)
 			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=$(expr \
 		"$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" \
 		: '\([^	]*\)	')

 	if test $? -eq 0 -a -n "$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

 	ext="$$$(expr "$MERGED" : '.*\(\.[^/]*\)$')"
 	BACKUP="./$MERGED.BACKUP.$ext"
 	LOCAL="./$MERGED.LOCAL.$ext"
 	REMOTE="./$MERGED.REMOTE.$ext"
 	BASE="./$MERGED.BASE.$ext"

 	base_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==1) print $1;}')
 	local_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $1;}')
 	remote_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $1;}')

 	if is_submodule "$local_mode" || is_submodule "$remote_mode"
 	then
 		echo "Submodule merge conflict for '$MERGED':"
 		local_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $2;}')
 		remote_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $2;}')
 		describe_file "$local_mode" "local" "$local_sha1"
 		describe_file "$remote_mode" "remote" "$remote_sha1"
 		resolve_submodule_merge
 		return
 	fi

 	mv -- "$MERGED" "$BACKUP"
 	cp -- "$BACKUP" "$MERGED"

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

 	if test -z "$local_mode" -o -z "$remote_mode"
 	then
 		echo "Deleted merge conflict for '$MERGED':"
 		describe_file "$local_mode" "local" "$LOCAL"
 		describe_file "$remote_mode" "remote" "$REMOTE"
 		resolve_deleted_merge
 		return
 	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" "$REMOTE"
 	if "$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=$(git config --bool mergetool.prompt || echo true)

 while test $# != 0
 do
 	case "$1" in
 	--tool-help)
 		show_tool_help
 		;;
 	-t|--tool*)
 		case "$#,$1" in
 		*,*=*)
 			merge_tool=$(expr "z$1" : 'z-[^=]*=\(.*\)')
 			;;
 		1,*)
 			usage ;;
 		*)
 			merge_tool="$2"
 			shift ;;
 		esac
 		;;
 	-y|--no-prompt)
 		prompt=false
 		;;
 	--prompt)
 		prompt=true
 		;;
 	--)
 		shift
 		break
 		;;
 	-*)
 		usage
 		;;
 	*)
 		break
 		;;
 	esac
 	shift
 done

 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
 }

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

 last_status=0
 rollup_status=0
 files=

 if test $# -eq 0
 then
 	cd_to_toplevel

 	if test -e "$GIT_DIR/MERGE_RR"
 	then
 		files=$(git rerere remaining)
 	else
 		files=$(git ls-files -u | sed -e 's/^[^	]*	//' | sort -u)
 	fi
 else
 	files=$(git ls-files -u -- "$@" | sed -e 's/^[^	]*	//' | sort -u)
 fi

 if test -z "$files"
 then
 	echo "No files need merging"
 	exit 0
 fi

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

 IFS='
 '
 for i in $files
 do
 	if test $last_status -ne 0
 	then
 		prompt_after_failed_merge || exit 1
 	fi
 	printf "\n"
 	merge_file "$i"
 	last_status=$?
 	if test $last_status -ne 0
 	then
 		rollup_status=1
 	fi
 done

 exit $rollup_status
	#!/bin/sh
	#
	# This program resolves merge conflicts in git
	#
	# Copyright (c) 2006 Theodore Y. Ts'o
	#
	# 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] [file to merge] ...'
	SUBDIRECTORY_OK=Yes
	OPTIONS_SPEC=
	TOOL_MODE=merge
	. git-sh-setup
	. git-mergetool--lib
	require_work_tree

	# 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"
	}

	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
	}

	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"
	cleanup_temp_files --save-backup
	return 0
	;;
	[dD]*)
	git rm -- "$MERGED" > /dev/null
	cleanup_temp_files
	return 0
	;;
	[aA]*)
	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=$(expr \
	"$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" \
	: '\([^ ]*\) ')

	if test $? -eq 0 -a -n "$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

	ext="$$$(expr "$MERGED" : '.\(\.[^/]\)$')"
	BACKUP="./$MERGED.BACKUP.$ext"
	LOCAL="./$MERGED.LOCAL.$ext"
	REMOTE="./$MERGED.REMOTE.$ext"
	BASE="./$MERGED.BASE.$ext"

	base_mode=$(git ls-files -u -- "$MERGED" \| awk '{if ($3==1) print $1;}')
	local_mode=$(git ls-files -u -- "$MERGED" \| awk '{if ($3==2) print $1;}')
	remote_mode=$(git ls-files -u -- "$MERGED" \| awk '{if ($3==3) print $1;}')

	if is_submodule "$local_mode" \|\| is_submodule "$remote_mode"
	then
	echo "Submodule merge conflict for '$MERGED':"
	local_sha1=$(git ls-files -u -- "$MERGED" \| awk '{if ($3==2) print $2;}')
	remote_sha1=$(git ls-files -u -- "$MERGED" \| awk '{if ($3==3) print $2;}')
	describe_file "$local_mode" "local" "$local_sha1"
	describe_file "$remote_mode" "remote" "$remote_sha1"
	resolve_submodule_merge
	return
	fi

	mv -- "$MERGED" "$BACKUP"
	cp -- "$BACKUP" "$MERGED"

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

	if test -z "$local_mode" -o -z "$remote_mode"
	then
	echo "Deleted merge conflict for '$MERGED':"
	describe_file "$local_mode" "local" "$LOCAL"
	describe_file "$remote_mode" "remote" "$REMOTE"
	resolve_deleted_merge
	return
	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" "$REMOTE"
	if "$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=$(git config --bool mergetool.prompt \|\| echo true)

	while test $# != 0
	do
	case "$1" in
	--tool-help)
	show_tool_help
	;;
	-t\|--tool*)
	case "$#,$1" in
	,=*)
	merge_tool=$(expr "z$1" : 'z-[^=]=\(.\)')
	;;
	1,*)
	usage ;;
	*)
	merge_tool="$2"
	shift ;;
	esac
	;;
	-y\|--no-prompt)
	prompt=false
	;;
	--prompt)
	prompt=true
	;;
	--)
	shift
	break
	;;
	-*)
	usage
	;;
	*)
	break
	;;
	esac
	shift
	done

	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
	}

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

	last_status=0
	rollup_status=0
	files=

	if test $# -eq 0
	then
	cd_to_toplevel

	if test -e "$GIT_DIR/MERGE_RR"
	then
	files=$(git rerere remaining)
	else
	files=$(git ls-files -u \| sed -e 's/^[^ ]* //' \| sort -u)
	fi
	else
	files=$(git ls-files -u -- "$@" \| sed -e 's/^[^ ]* //' \| sort -u)
	fi

	if test -z "$files"
	then
	echo "No files need merging"
	exit 0
	fi

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

	IFS='
	'
	for i in $files
	do
	if test $last_status -ne 0
	then
	prompt_after_failed_merge \|\| exit 1
	fi
	printf "\n"
	merge_file "$i"
	last_status=$?
	if test $last_status -ne 0
	then
	rollup_status=1
	fi
	done

	exit $rollup_status