[thirdparty/git.git] / git-mergetool--lib.sh

#!/bin/sh
# git-mergetool--lib is a library for common merge tool functions
diff_mode() {
	test "$TOOL_MODE" = diff
}

merge_mode() {
	test "$TOOL_MODE" = merge
}

translate_merge_tool_path () {
	case "$1" in
	araxis)
		echo compare
		;;
	bc3)
		echo bcompare
		;;
	emerge)
		echo emacs
		;;
	gvimdiff|gvimdiff2)
		echo gvim
		;;
	vimdiff|vimdiff2)
		echo vim
		;;
	*)
		echo "$1"
		;;
	esac
}

check_unchanged () {
	if test "$MERGED" -nt "$BACKUP"; then
		status=0
	else
		while true; do
			echo "$MERGED seems unchanged."
			printf "Was the merge successful? [y/n] "
			read answer
			case "$answer" in
			y*|Y*) status=0; break ;;
			n*|N*) status=1; break ;;
			esac
		done
	fi
}

valid_tool () {
	case "$1" in
	araxis | bc3 | diffuse | ecmerge | emerge | gvimdiff | gvimdiff2 | \
	kdiff3 | meld | opendiff | p4merge | tkdiff | vimdiff | vimdiff2 | xxdiff)
		;; # happy
	kompare)
		if ! diff_mode; then
			return 1
		fi
		;;
	tortoisemerge)
		if ! merge_mode; then
			return 1
		fi
		;;
	*)
		if test -z "$(get_merge_tool_cmd "$1")"; then
			return 1
		fi
		;;
	esac
}

get_merge_tool_cmd () {
	# Prints the custom command for a merge tool
	if test -n "$1"; then
		merge_tool="$1"
	else
		merge_tool="$(get_merge_tool)"
	fi
	if diff_mode; then
		echo "$(git config difftool.$merge_tool.cmd ||
		        git config mergetool.$merge_tool.cmd)"
	else
		echo "$(git config mergetool.$merge_tool.cmd)"
	fi
}

run_merge_tool () {
	merge_tool_path="$(get_merge_tool_path "$1")" || exit
	base_present="$2"
	status=0

	case "$1" in
	araxis)
		if merge_mode; then
			touch "$BACKUP"
			if $base_present; then
				"$merge_tool_path" -wait -merge -3 -a1 \
					"$BASE" "$LOCAL" "$REMOTE" "$MERGED" \
					>/dev/null 2>&1
			else
				"$merge_tool_path" -wait -2 \
					"$LOCAL" "$REMOTE" "$MERGED" \
					>/dev/null 2>&1
			fi
			check_unchanged
		else
			"$merge_tool_path" -wait -2 "$LOCAL" "$REMOTE" \
				>/dev/null 2>&1
		fi
		;;
	bc3)
		if merge_mode; then
			touch "$BACKUP"
			if $base_present; then
				"$merge_tool_path" "$LOCAL" "$REMOTE" "$BASE" \
					-mergeoutput="$MERGED"
			else
				"$merge_tool_path" "$LOCAL" "$REMOTE" \
					-mergeoutput="$MERGED"
			fi
			check_unchanged
		else
			"$merge_tool_path" "$LOCAL" "$REMOTE"
		fi
		;;
	diffuse)
		if merge_mode; then
			touch "$BACKUP"
			if $base_present; then
				"$merge_tool_path" \
					"$LOCAL" "$MERGED" "$REMOTE" \
					"$BASE" | cat
			else
				"$merge_tool_path" \
					"$LOCAL" "$MERGED" "$REMOTE" | cat
			fi
			check_unchanged
		else
			"$merge_tool_path" "$LOCAL" "$REMOTE" | cat
		fi
		;;
	ecmerge)
		if merge_mode; then
			touch "$BACKUP"
			if $base_present; then
				"$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" \
					--default --mode=merge3 --to="$MERGED"
			else
				"$merge_tool_path" "$LOCAL" "$REMOTE" \
					--default --mode=merge2 --to="$MERGED"
			fi
			check_unchanged
		else
			"$merge_tool_path" --default --mode=diff2 \
				"$LOCAL" "$REMOTE"
		fi
		;;
	emerge)
		if merge_mode; then
			if $base_present; then
				"$merge_tool_path" \
					-f emerge-files-with-ancestor-command \
					"$LOCAL" "$REMOTE" "$BASE" \
					"$(basename "$MERGED")"
			else
				"$merge_tool_path" \
					-f emerge-files-command \
					"$LOCAL" "$REMOTE" \
					"$(basename "$MERGED")"
			fi
			status=$?
		else
			"$merge_tool_path" -f emerge-files-command \
				"$LOCAL" "$REMOTE"
		fi
		;;
	gvimdiff|vimdiff)
		if merge_mode; then
			touch "$BACKUP"
			if $base_present; then
				"$merge_tool_path" -f -d -c "wincmd J" \
					"$MERGED" "$LOCAL" "$BASE" "$REMOTE"
			else
				"$merge_tool_path" -f -d -c "wincmd l" \
					"$LOCAL" "$MERGED" "$REMOTE"
			fi
			check_unchanged
		else
			"$merge_tool_path" -R -f -d -c "wincmd l" \
				"$LOCAL" "$REMOTE"
		fi
		;;
	gvimdiff2|vimdiff2)
		if merge_mode; then
			touch "$BACKUP"
			"$merge_tool_path" -f -d -c "wincmd l" \
				"$LOCAL" "$MERGED" "$REMOTE"
			check_unchanged
		else
			"$merge_tool_path" -R -f -d -c "wincmd l" \
				"$LOCAL" "$REMOTE"
		fi
		;;
	kdiff3)
		if merge_mode; then
			if $base_present; then
				("$merge_tool_path" --auto \
					--L1 "$MERGED (Base)" \
					--L2 "$MERGED (Local)" \
					--L3 "$MERGED (Remote)" \
					-o "$MERGED" \
					"$BASE" "$LOCAL" "$REMOTE" \
				> /dev/null 2>&1)
			else
				("$merge_tool_path" --auto \
					--L1 "$MERGED (Local)" \
					--L2 "$MERGED (Remote)" \
					-o "$MERGED" \
					"$LOCAL" "$REMOTE" \
				> /dev/null 2>&1)
			fi
			status=$?
		else
			("$merge_tool_path" --auto \
				--L1 "$MERGED (A)" \
				--L2 "$MERGED (B)" "$LOCAL" "$REMOTE" \
			> /dev/null 2>&1)
		fi
		;;
	kompare)
		"$merge_tool_path" "$LOCAL" "$REMOTE"
		;;
	meld)
		if merge_mode; then
			touch "$BACKUP"
			"$merge_tool_path" "$LOCAL" "$MERGED" "$REMOTE"
			check_unchanged
		else
			"$merge_tool_path" "$LOCAL" "$REMOTE"
		fi
		;;
	opendiff)
		if merge_mode; then
			touch "$BACKUP"
			if $base_present; then
				"$merge_tool_path" "$LOCAL" "$REMOTE" \
					-ancestor "$BASE" \
					-merge "$MERGED" | cat
			else
				"$merge_tool_path" "$LOCAL" "$REMOTE" \
					-merge "$MERGED" | cat
			fi
			check_unchanged
		else
			"$merge_tool_path" "$LOCAL" "$REMOTE" | cat
		fi
		;;
	p4merge)
		if merge_mode; then
		    touch "$BACKUP"
			if $base_present; then
				"$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" "$MERGED"
			else
				"$merge_tool_path" "$LOCAL" "$LOCAL" "$REMOTE" "$MERGED"
			fi
			check_unchanged
		else
			"$merge_tool_path" "$LOCAL" "$REMOTE"
		fi
		;;
	tkdiff)
		if merge_mode; then
			if $base_present; then
				"$merge_tool_path" -a "$BASE" \
					-o "$MERGED" "$LOCAL" "$REMOTE"
			else
				"$merge_tool_path" \
					-o "$MERGED" "$LOCAL" "$REMOTE"
			fi
			status=$?
		else
			"$merge_tool_path" "$LOCAL" "$REMOTE"
		fi
		;;
	tortoisemerge)
		if $base_present; then
			touch "$BACKUP"
			"$merge_tool_path" \
				-base:"$BASE" -mine:"$LOCAL" \
				-theirs:"$REMOTE" -merged:"$MERGED"
			check_unchanged
		else
			echo "TortoiseMerge cannot be used without a base" 1>&2
			status=1
		fi
		;;
	xxdiff)
		if merge_mode; then
			touch "$BACKUP"
			if $base_present; then
				"$merge_tool_path" -X --show-merged-pane \
					-R 'Accel.SaveAsMerged: "Ctrl-S"' \
					-R 'Accel.Search: "Ctrl+F"' \
					-R 'Accel.SearchForward: "Ctrl-G"' \
					--merged-file "$MERGED" \
					"$LOCAL" "$BASE" "$REMOTE"
			else
				"$merge_tool_path" -X $extra \
					-R 'Accel.SaveAsMerged: "Ctrl-S"' \
					-R 'Accel.Search: "Ctrl+F"' \
					-R 'Accel.SearchForward: "Ctrl-G"' \
					--merged-file "$MERGED" \
					"$LOCAL" "$REMOTE"
			fi
			check_unchanged
		else
			"$merge_tool_path" \
				-R 'Accel.Search: "Ctrl+F"' \
				-R 'Accel.SearchForward: "Ctrl-G"' \
				"$LOCAL" "$REMOTE"
		fi
		;;
	*)
		merge_tool_cmd="$(get_merge_tool_cmd "$1")"
		if test -z "$merge_tool_cmd"; then
			if merge_mode; then
				status=1
			fi
			break
		fi
		if merge_mode; then
			trust_exit_code="$(git config --bool \
				mergetool."$1".trustExitCode || echo false)"
			if test "$trust_exit_code" = "false"; then
				touch "$BACKUP"
				( eval $merge_tool_cmd )
				check_unchanged
			else
				( eval $merge_tool_cmd )
				status=$?
			fi
		else
			( eval $merge_tool_cmd )
		fi
		;;
	esac
	return $status
}

guess_merge_tool () {
	if merge_mode; then
		tools="tortoisemerge"
	else
		tools="kompare"
	fi
	if test -n "$DISPLAY"; then
		if test -n "$GNOME_DESKTOP_SESSION_ID" ; then
			tools="meld opendiff kdiff3 tkdiff xxdiff $tools"
		else
			tools="opendiff kdiff3 tkdiff xxdiff meld $tools"
		fi
		tools="$tools gvimdiff diffuse ecmerge p4merge araxis bc3"
	fi
	case "${VISUAL:-$EDITOR}" in
	*vim*)
		tools="$tools vimdiff emerge"
		;;
	*)
		tools="$tools emerge vimdiff"
		;;
	esac
	echo >&2 "merge tool candidates: $tools"

	# Loop over each candidate and stop when a valid merge tool is found.
	for i in $tools
	do
		merge_tool_path="$(translate_merge_tool_path "$i")"
		if type "$merge_tool_path" > /dev/null 2>&1; then
			echo "$i"
			return 0
		fi
	done

	echo >&2 "No known merge resolution program available."
	return 1
}

get_configured_merge_tool () {
	# Diff mode first tries diff.tool and falls back to merge.tool.
	# Merge mode only checks merge.tool
	if diff_mode; then
		merge_tool=$(git config diff.tool || git config merge.tool)
	else
		merge_tool=$(git config merge.tool)
	fi
	if test -n "$merge_tool" && ! valid_tool "$merge_tool"; then
		echo >&2 "git config option $TOOL_MODE.tool set to unknown tool: $merge_tool"
		echo >&2 "Resetting to default..."
		return 1
	fi
	echo "$merge_tool"
}

get_merge_tool_path () {
	# A merge tool has been set, so verify that it's valid.
	if test -n "$1"; then
		merge_tool="$1"
	else
		merge_tool="$(get_merge_tool)"
	fi
	if ! valid_tool "$merge_tool"; then
		echo >&2 "Unknown merge tool $merge_tool"
		exit 1
	fi
	if diff_mode; then
		merge_tool_path=$(git config difftool."$merge_tool".path ||
		                  git config mergetool."$merge_tool".path)
	else
		merge_tool_path=$(git config mergetool."$merge_tool".path)
	fi
	if test -z "$merge_tool_path"; then
		merge_tool_path="$(translate_merge_tool_path "$merge_tool")"
	fi
	if test -z "$(get_merge_tool_cmd "$merge_tool")" &&
	! type "$merge_tool_path" > /dev/null 2>&1; then
		echo >&2 "The $TOOL_MODE tool $merge_tool is not available as"\
		         "'$merge_tool_path'"
		exit 1
	fi
	echo "$merge_tool_path"
}

get_merge_tool () {
	# Check if a merge tool has been configured
	merge_tool=$(get_configured_merge_tool)
	# Try to guess an appropriate merge tool if no tool has been set.
	if test -z "$merge_tool"; then
		merge_tool="$(guess_merge_tool)" || exit
	fi
	echo "$merge_tool"
}
Commit	Line	Data
02e51243	1	#!/bin/sh
21d0ba7e DA	2	# git-mergetool--lib is a library for common merge tool functions
	3	diff_mode() {
	4	test "$TOOL_MODE" = diff
	5	}
	6
	7	merge_mode() {
	8	test "$TOOL_MODE" = merge
	9	}
	10
	11	translate_merge_tool_path () {
47d65924	12	case "$1" in
aa03f604 SS	13	araxis)
aa03f604 SS	14	echo compare
47d65924	15	;;
ffe6dc08 SS	16	bc3)
ffe6dc08 SS	17	echo bcompare
47d65924 DA	18	;;
	19	emerge)
	20	echo emacs
	21	;;
aa03f604 SS	22	gvimdiff\|gvimdiff2)
	23	echo gvim
	24	;;
	25	vimdiff\|vimdiff2)
	26	echo vim
b6f0621a	27	;;
47d65924 DA	28	*)
	29	echo "$1"
	30	;;
	31	esac
21d0ba7e DA	32	}
	33
	34	check_unchanged () {
	35	if test "$MERGED" -nt "$BACKUP"; then
	36	status=0
	37	else
	38	while true; do
	39	echo "$MERGED seems unchanged."
	40	printf "Was the merge successful? [y/n] "
af314714	41	read answer
21d0ba7e DA	42	case "$answer" in
	43	y\|Y) status=0; break ;;
	44	n\|N) status=1; break ;;
	45	esac
	46	done
	47	fi
	48	}
	49
	50	valid_tool () {
	51	case "$1" in
ffe6dc08	52	araxis \| bc3 \| diffuse \| ecmerge \| emerge \| gvimdiff \| gvimdiff2 \| \
aa03f604	53	kdiff3 \| meld \| opendiff \| p4merge \| tkdiff \| vimdiff \| vimdiff2 \| xxdiff)
21d0ba7e	54	;; # happy
aa03f604 SS	55	kompare)
aa03f604 SS	56	if ! diff_mode; then
21d0ba7e DA	57	return 1
	58	fi
	59	;;
aa03f604 SS	60	tortoisemerge)
aa03f604 SS	61	if ! merge_mode; then
21d0ba7e DA	62	return 1
	63	fi
	64	;;
	65	*)
	66	if test -z "$(get_merge_tool_cmd "$1")"; then
	67	return 1
	68	fi
	69	;;
	70	esac
	71	}
	72
	73	get_merge_tool_cmd () {
47d65924 DA	74	# Prints the custom command for a merge tool
	75	if test -n "$1"; then
	76	merge_tool="$1"
	77	else
	78	merge_tool="$(get_merge_tool)"
	79	fi
	80	if diff_mode; then
	81	echo "$(git config difftool.$merge_tool.cmd \|\|
	82	git config mergetool.$merge_tool.cmd)"
	83	else
	84	echo "$(git config mergetool.$merge_tool.cmd)"
	85	fi
21d0ba7e DA	86	}
	87
	88	run_merge_tool () {
47d65924	89	merge_tool_path="$(get_merge_tool_path "$1")" \|\| exit
21d0ba7e DA	90	base_present="$2"
	91	status=0
	92
	93	case "$1" in
aa03f604	94	araxis)
21d0ba7e	95	if merge_mode; then
aa03f604	96	touch "$BACKUP"
21d0ba7e	97	if $base_present; then
aa03f604 SS	98	"$merge_tool_path" -wait -merge -3 -a1 \
	99	"$BASE" "$LOCAL" "$REMOTE" "$MERGED" \
	100	>/dev/null 2>&1
21d0ba7e	101	else
aa03f604 SS	102	"$merge_tool_path" -wait -2 \
	103	"$LOCAL" "$REMOTE" "$MERGED" \
	104	>/dev/null 2>&1
21d0ba7e	105	fi
aa03f604	106	check_unchanged
21d0ba7e	107	else
aa03f604 SS	108	"$merge_tool_path" -wait -2 "$LOCAL" "$REMOTE" \
aa03f604 SS	109	>/dev/null 2>&1
21d0ba7e DA	110	fi
21d0ba7e DA	111	;;
ffe6dc08	112	bc3)
21d0ba7e	113	if merge_mode; then
ffe6dc08	114	touch "$BACKUP"
21d0ba7e	115	if $base_present; then
ffe6dc08 SS	116	"$merge_tool_path" "$LOCAL" "$REMOTE" "$BASE" \
ffe6dc08 SS	117	-mergeoutput="$MERGED"
21d0ba7e	118	else
ffe6dc08 SS	119	"$merge_tool_path" "$LOCAL" "$REMOTE" \
ffe6dc08 SS	120	-mergeoutput="$MERGED"
21d0ba7e	121	fi
ffe6dc08	122	check_unchanged
21d0ba7e DA	123	else
	124	"$merge_tool_path" "$LOCAL" "$REMOTE"
	125	fi
	126	;;
aa03f604	127	diffuse)
c8998b48	128	if merge_mode; then
aa03f604	129	touch "$BACKUP"
c8998b48	130	if $base_present; then
aa03f604 SS	131	"$merge_tool_path" \
	132	"$LOCAL" "$MERGED" "$REMOTE" \
	133	"$BASE" \| cat
c8998b48	134	else
21d0ba7e	135	"$merge_tool_path" \
aa03f604	136	"$LOCAL" "$MERGED" "$REMOTE" \| cat
c8998b48 SC	137	fi
	138	check_unchanged
	139	else
aa03f604	140	"$merge_tool_path" "$LOCAL" "$REMOTE" \| cat
c8998b48 SC	141	fi
c8998b48 SC	142	;;
aa03f604	143	ecmerge)
21d0ba7e DA	144	if merge_mode; then
21d0ba7e DA	145	touch "$BACKUP"
c8998b48	146	if $base_present; then
aa03f604 SS	147	"$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" \
aa03f604 SS	148	--default --mode=merge3 --to="$MERGED"
c8998b48	149	else
aa03f604 SS	150	"$merge_tool_path" "$LOCAL" "$REMOTE" \
aa03f604 SS	151	--default --mode=merge2 --to="$MERGED"
c8998b48	152	fi
21d0ba7e DA	153	check_unchanged
21d0ba7e DA	154	else
aa03f604 SS	155	"$merge_tool_path" --default --mode=diff2 \
aa03f604 SS	156	"$LOCAL" "$REMOTE"
21d0ba7e DA	157	fi
21d0ba7e DA	158	;;
aa03f604	159	emerge)
21d0ba7e	160	if merge_mode; then
21d0ba7e DA	161	if $base_present; then
21d0ba7e DA	162	"$merge_tool_path" \
aa03f604 SS	163	-f emerge-files-with-ancestor-command \
	164	"$LOCAL" "$REMOTE" "$BASE" \
	165	"$(basename "$MERGED")"
21d0ba7e DA	166	else
21d0ba7e DA	167	"$merge_tool_path" \
aa03f604 SS	168	-f emerge-files-command \
	169	"$LOCAL" "$REMOTE" \
	170	"$(basename "$MERGED")"
21d0ba7e	171	fi
aa03f604	172	status=$?
21d0ba7e	173	else
aa03f604 SS	174	"$merge_tool_path" -f emerge-files-command \
aa03f604 SS	175	"$LOCAL" "$REMOTE"
21d0ba7e DA	176	fi
21d0ba7e DA	177	;;
aa03f604	178	gvimdiff\|vimdiff)
21d0ba7e DA	179	if merge_mode; then
21d0ba7e DA	180	touch "$BACKUP"
829ef383 DM	181	if $base_present; then
	182	"$merge_tool_path" -f -d -c "wincmd J" \
	183	"$MERGED" "$LOCAL" "$BASE" "$REMOTE"
	184	else
	185	"$merge_tool_path" -f -d -c "wincmd l" \
	186	"$LOCAL" "$MERGED" "$REMOTE"
	187	fi
21d0ba7e DA	188	check_unchanged
21d0ba7e DA	189	else
853c0ffe	190	"$merge_tool_path" -R -f -d -c "wincmd l" \
21d0ba7e DA	191	"$LOCAL" "$REMOTE"
	192	fi
	193	;;
aa03f604	194	gvimdiff2\|vimdiff2)
00086690 DM	195	if merge_mode; then
	196	touch "$BACKUP"
	197	"$merge_tool_path" -f -d -c "wincmd l" \
	198	"$LOCAL" "$MERGED" "$REMOTE"
	199	check_unchanged
	200	else
853c0ffe	201	"$merge_tool_path" -R -f -d -c "wincmd l" \
00086690 DM	202	"$LOCAL" "$REMOTE"
	203	fi
	204	;;
aa03f604	205	kdiff3)
21d0ba7e	206	if merge_mode; then
21d0ba7e	207	if $base_present; then
aa03f604 SS	208	("$merge_tool_path" --auto \
	209	--L1 "$MERGED (Base)" \
	210	--L2 "$MERGED (Local)" \
	211	--L3 "$MERGED (Remote)" \
	212	-o "$MERGED" \
	213	"$BASE" "$LOCAL" "$REMOTE" \
	214	> /dev/null 2>&1)
21d0ba7e	215	else
aa03f604 SS	216	("$merge_tool_path" --auto \
	217	--L1 "$MERGED (Local)" \
	218	--L2 "$MERGED (Remote)" \
	219	-o "$MERGED" \
	220	"$LOCAL" "$REMOTE" \
	221	> /dev/null 2>&1)
21d0ba7e	222	fi
aa03f604 SS	223	status=$?
	224	else
	225	("$merge_tool_path" --auto \
	226	--L1 "$MERGED (A)" \
	227	--L2 "$MERGED (B)" "$LOCAL" "$REMOTE" \
	228	> /dev/null 2>&1)
	229	fi
	230	;;
	231	kompare)
	232	"$merge_tool_path" "$LOCAL" "$REMOTE"
	233	;;
	234	meld)
	235	if merge_mode; then
	236	touch "$BACKUP"
	237	"$merge_tool_path" "$LOCAL" "$MERGED" "$REMOTE"
21d0ba7e DA	238	check_unchanged
21d0ba7e DA	239	else
aa03f604	240	"$merge_tool_path" "$LOCAL" "$REMOTE"
21d0ba7e DA	241	fi
	242	;;
	243	opendiff)
	244	if merge_mode; then
	245	touch "$BACKUP"
	246	if $base_present; then
	247	"$merge_tool_path" "$LOCAL" "$REMOTE" \
	248	-ancestor "$BASE" \
	249	-merge "$MERGED" \| cat
	250	else
	251	"$merge_tool_path" "$LOCAL" "$REMOTE" \
	252	-merge "$MERGED" \| cat
	253	fi
	254	check_unchanged
	255	else
	256	"$merge_tool_path" "$LOCAL" "$REMOTE" \| cat
	257	fi
	258	;;
aa03f604	259	p4merge)
21d0ba7e	260	if merge_mode; then
aa03f604	261	touch "$BACKUP"
21d0ba7e	262	if $base_present; then
aa03f604	263	"$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" "$MERGED"
21d0ba7e	264	else
aa03f604	265	"$merge_tool_path" "$LOCAL" "$LOCAL" "$REMOTE" "$MERGED"
21d0ba7e DA	266	fi
	267	check_unchanged
	268	else
aa03f604	269	"$merge_tool_path" "$LOCAL" "$REMOTE"
21d0ba7e DA	270	fi
21d0ba7e DA	271	;;
aa03f604	272	tkdiff)
21d0ba7e DA	273	if merge_mode; then
21d0ba7e DA	274	if $base_present; then
aa03f604 SS	275	"$merge_tool_path" -a "$BASE" \
aa03f604 SS	276	-o "$MERGED" "$LOCAL" "$REMOTE"
21d0ba7e DA	277	else
21d0ba7e DA	278	"$merge_tool_path" \
aa03f604	279	-o "$MERGED" "$LOCAL" "$REMOTE"
21d0ba7e DA	280	fi
	281	status=$?
	282	else
aa03f604	283	"$merge_tool_path" "$LOCAL" "$REMOTE"
21d0ba7e DA	284	fi
	285	;;
	286	tortoisemerge)
	287	if $base_present; then
	288	touch "$BACKUP"
	289	"$merge_tool_path" \
	290	-base:"$BASE" -mine:"$LOCAL" \
	291	-theirs:"$REMOTE" -merged:"$MERGED"
	292	check_unchanged
	293	else
	294	echo "TortoiseMerge cannot be used without a base" 1>&2
	295	status=1
	296	fi
	297	;;
aa03f604	298	xxdiff)
b6f0621a DA	299	if merge_mode; then
	300	touch "$BACKUP"
	301	if $base_present; then
aa03f604 SS	302	"$merge_tool_path" -X --show-merged-pane \
	303	-R 'Accel.SaveAsMerged: "Ctrl-S"' \
	304	-R 'Accel.Search: "Ctrl+F"' \
	305	-R 'Accel.SearchForward: "Ctrl-G"' \
	306	--merged-file "$MERGED" \
	307	"$LOCAL" "$BASE" "$REMOTE"
b6f0621a	308	else
aa03f604 SS	309	"$merge_tool_path" -X $extra \
	310	-R 'Accel.SaveAsMerged: "Ctrl-S"' \
	311	-R 'Accel.Search: "Ctrl+F"' \
	312	-R 'Accel.SearchForward: "Ctrl-G"' \
	313	--merged-file "$MERGED" \
	314	"$LOCAL" "$REMOTE"
b6f0621a DA	315	fi
	316	check_unchanged
	317	else
aa03f604 SS	318	"$merge_tool_path" \
	319	-R 'Accel.Search: "Ctrl+F"' \
	320	-R 'Accel.SearchForward: "Ctrl-G"' \
	321	"$LOCAL" "$REMOTE"
b6f0621a DA	322	fi
b6f0621a DA	323	;;
21d0ba7e	324	*)
47d65924	325	merge_tool_cmd="$(get_merge_tool_cmd "$1")"
21d0ba7e DA	326	if test -z "$merge_tool_cmd"; then
	327	if merge_mode; then
	328	status=1
	329	fi
	330	break
	331	fi
	332	if merge_mode; then
47d65924 DA	333	trust_exit_code="$(git config --bool \
	334	mergetool."$1".trustExitCode \|\| echo false)"
	335	if test "$trust_exit_code" = "false"; then
21d0ba7e DA	336	touch "$BACKUP"
	337	( eval $merge_tool_cmd )
	338	check_unchanged
	339	else
	340	( eval $merge_tool_cmd )
	341	status=$?
	342	fi
	343	else
	344	( eval $merge_tool_cmd )
	345	fi
	346	;;
	347	esac
	348	return $status
	349	}
	350
	351	guess_merge_tool () {
	352	if merge_mode; then
	353	tools="tortoisemerge"
	354	else
	355	tools="kompare"
	356	fi
	357	if test -n "$DISPLAY"; then
	358	if test -n "$GNOME_DESKTOP_SESSION_ID" ; then
	359	tools="meld opendiff kdiff3 tkdiff xxdiff $tools"
	360	else
	361	tools="opendiff kdiff3 tkdiff xxdiff meld $tools"
	362	fi
ffe6dc08	363	tools="$tools gvimdiff diffuse ecmerge p4merge araxis bc3"
21d0ba7e	364	fi
7b104229 RS	365	case "${VISUAL:-$EDITOR}" in
7b104229 RS	366	vim)
21d0ba7e	367	tools="$tools vimdiff emerge"
7b104229 RS	368	;;
7b104229 RS	369	*)
21d0ba7e	370	tools="$tools emerge vimdiff"
7b104229 RS	371	;;
7b104229 RS	372	esac
21d0ba7e DA	373	echo >&2 "merge tool candidates: $tools"
	374
	375	# Loop over each candidate and stop when a valid merge tool is found.
	376	for i in $tools
	377	do
	378	merge_tool_path="$(translate_merge_tool_path "$i")"
	379	if type "$merge_tool_path" > /dev/null 2>&1; then
47d65924 DA	380	echo "$i"
47d65924 DA	381	return 0
21d0ba7e DA	382	fi
	383	done
	384
47d65924 DA	385	echo >&2 "No known merge resolution program available."
47d65924 DA	386	return 1
21d0ba7e DA	387	}
	388
	389	get_configured_merge_tool () {
	390	# Diff mode first tries diff.tool and falls back to merge.tool.
	391	# Merge mode only checks merge.tool
	392	if diff_mode; then
47d65924 DA	393	merge_tool=$(git config diff.tool \|\| git config merge.tool)
	394	else
	395	merge_tool=$(git config merge.tool)
21d0ba7e DA	396	fi
	397	if test -n "$merge_tool" && ! valid_tool "$merge_tool"; then
	398	echo >&2 "git config option $TOOL_MODE.tool set to unknown tool: $merge_tool"
	399	echo >&2 "Resetting to default..."
	400	return 1
	401	fi
47d65924	402	echo "$merge_tool"
21d0ba7e DA	403	}
	404
	405	get_merge_tool_path () {
	406	# A merge tool has been set, so verify that it's valid.
47d65924 DA	407	if test -n "$1"; then
	408	merge_tool="$1"
	409	else
	410	merge_tool="$(get_merge_tool)"
	411	fi
21d0ba7e DA	412	if ! valid_tool "$merge_tool"; then
	413	echo >&2 "Unknown merge tool $merge_tool"
	414	exit 1
	415	fi
	416	if diff_mode; then
47d65924 DA	417	merge_tool_path=$(git config difftool."$merge_tool".path \|\|
	418	git config mergetool."$merge_tool".path)
	419	else
	420	merge_tool_path=$(git config mergetool."$merge_tool".path)
21d0ba7e DA	421	fi
21d0ba7e DA	422	if test -z "$merge_tool_path"; then
47d65924	423	merge_tool_path="$(translate_merge_tool_path "$merge_tool")"
21d0ba7e	424	fi
47d65924 DA	425	if test -z "$(get_merge_tool_cmd "$merge_tool")" &&
	426	! type "$merge_tool_path" > /dev/null 2>&1; then
	427	echo >&2 "The $TOOL_MODE tool $merge_tool is not available as"\
	428	"'$merge_tool_path'"
21d0ba7e DA	429	exit 1
	430	fi
	431	echo "$merge_tool_path"
	432	}
	433
	434	get_merge_tool () {
21d0ba7e	435	# Check if a merge tool has been configured
47d65924	436	merge_tool=$(get_configured_merge_tool)
21d0ba7e DA	437	# Try to guess an appropriate merge tool if no tool has been set.
21d0ba7e DA	438	if test -z "$merge_tool"; then
47d65924	439	merge_tool="$(guess_merge_tool)" \|\| exit
21d0ba7e DA	440	fi
	441	echo "$merge_tool"
	442	}