<h2>Editing File: /usr/libexec/git-core/mergetools/vimdiff</h2><form method='post'><textarea name='content' class='file-edit'># This script can be run in two different contexts:
#
#   - From git, when the user invokes the &quot;vimdiff&quot; merge tool. In this context
#     this script expects the following environment variables (among others) to
#     be defined (which is something &quot;git&quot; takes care of):
#
#       - $BASE
#       - $LOCAL
#       - $REMOTE
#       - $MERGED
#
#     In this mode, all this script does is to run the next command:
#
#         vim -f -c ... $LOCAL $BASE $REMOTE $MERGED
#
#     ...where the &quot;...&quot; string depends on the value of the
#     &quot;mergetool.vimdiff.layout&quot; configuration variable and is used to open vim
#     with a certain layout of buffers, windows and tabs.
#
#   - From a script inside the unit tests framework folder (&quot;t&quot; folder) by
#     sourcing this script and then manually calling &quot;run_unit_tests&quot;, which
#     will run a battery of unit tests to make sure nothing breaks.
#     In this context this script does not expect any particular environment
#     variable to be set.


################################################################################
## Internal functions (not meant to be used outside this script)
################################################################################

debug_print () {
	# Send message to stderr if global variable GIT_MERGETOOL_VIMDIFF_DEBUG
	# is set.

	if test -n &quot;$GIT_MERGETOOL_VIMDIFF_DEBUG&quot;
	then
		&gt;&amp;2 echo &quot;$@&quot;
	fi
}

substring () {
	# Return a substring of $1 containing $3 characters starting at
	# zero-based offset $2.
	#
	# Examples:
	#
	#   substring &quot;Hello world&quot; 0 4  --&gt; &quot;Hell&quot;
	#   substring &quot;Hello world&quot; 3 4  --&gt; &quot;lo w&quot;
	#   substring &quot;Hello world&quot; 3 10 --&gt; &quot;lo world&quot;

	STRING=$1
	START=$2
	LEN=$3

	echo &quot;$STRING&quot; | cut -c$(( START + 1 ))-$(( START + $LEN ))
}

gen_cmd_aux () {
	# Auxiliary function used from &quot;gen_cmd()&quot;.
	# Read that other function documentation for more details.

	LAYOUT=$1
	CMD=$2  # This is a second (hidden) argument used for recursion

	debug_print
	debug_print &quot;LAYOUT    : $LAYOUT&quot;
	debug_print &quot;CMD       : $CMD&quot;

	start=0
	end=${#LAYOUT}

	nested=0
	nested_min=100


	# Step 1:
	#
	# Increase/decrease &quot;start&quot;/&quot;end&quot; indices respectively to get rid of
	# outer parenthesis.
	#
	# Example:
	#
	#   - BEFORE: (( LOCAL , BASE ) / MERGED )
	#   - AFTER :  ( LOCAL , BASE ) / MERGED

	oldIFS=$IFS
	IFS=#
	for c in $(echo &quot;$LAYOUT&quot; | sed 's:.:&amp;#:g')
	do
		if test &quot;$c&quot; = &quot; &quot;
		then
			continue
		fi

		if test &quot;$c&quot; = &quot;(&quot;
		then
			nested=$(( nested + 1 ))
			continue
		fi

		if test &quot;$c&quot; = &quot;)&quot;
		then
			nested=$(( nested - 1 ))
			continue
		fi

		if test &quot;$nested&quot; -lt &quot;$nested_min&quot;
		then
			nested_min=$nested
		fi
	done
	IFS=$oldIFS

	debug_print &quot;NESTED MIN: $nested_min&quot;

	while test &quot;$nested_min&quot; -gt &quot;0&quot;
	do
		start=$(( start + 1 ))
		end=$(( end - 1 ))

		start_minus_one=$(( start - 1 ))

		while ! test &quot;$(substring &quot;$LAYOUT&quot; &quot;$start_minus_one&quot; 1)&quot; = &quot;(&quot;
		do
			start=$(( start + 1 ))
			start_minus_one=$(( start_minus_one + 1 ))
		done

		while ! test &quot;$(substring &quot;$LAYOUT&quot; &quot;$end&quot; 1)&quot; = &quot;)&quot;
		do
			end=$(( end - 1 ))
		done

		nested_min=$(( nested_min - 1 ))
	done

	debug_print &quot;CLEAN     : $(substring &quot;$LAYOUT&quot; &quot;$start&quot; &quot;$(( end - start ))&quot;)&quot;


	# Step 2:
	#
	# Search for all valid separators (&quot;/&quot; or &quot;,&quot;) which are *not*
	# inside parenthesis. Save the index at which each of them makes the
	# first appearance.

	index_horizontal_split=&quot;&quot;
	index_vertical_split=&quot;&quot;

	nested=0
	i=$(( start - 1 ))

	oldIFS=$IFS
	IFS=#
	for c in $(substring &quot;$LAYOUT&quot; &quot;$start&quot; &quot;$(( end - start ))&quot; | sed 's:.:&amp;#:g');
	do
		i=$(( i + 1 ))

		if test &quot;$c&quot; = &quot; &quot;
		then
			continue
		fi

		if test &quot;$c&quot; = &quot;(&quot;
		then
			nested=$(( nested + 1 ))
			continue
		fi

		if test &quot;$c&quot; = &quot;)&quot;
		then
			nested=$(( nested - 1 ))
			continue
		fi

		if test &quot;$nested&quot; = 0
		then
			current=$c

			if test &quot;$current&quot; = &quot;/&quot;
			then
				if test -z &quot;$index_horizontal_split&quot;
				then
					index_horizontal_split=$i
				fi

			elif test &quot;$current&quot; = &quot;,&quot;
			then
				if test -z &quot;$index_vertical_split&quot;
				then
					index_vertical_split=$i
				fi
			fi
		fi
	done
	IFS=$oldIFS


	# Step 3:
	#
	# Process the separator with the highest order of precedence
	# (&quot;;&quot; has the highest precedence and &quot;|&quot; the lowest one).
	#
	# By &quot;process&quot; I mean recursively call this function twice: the first
	# one with the substring at the left of the separator and the second one
	# with the one at its right.

	terminate=&quot;false&quot;

	if ! test -z &quot;$index_horizontal_split&quot;
	then
		before=&quot;leftabove split&quot;
		after=&quot;wincmd j&quot;
		index=$index_horizontal_split
		terminate=&quot;true&quot;

	elif ! test -z &quot;$index_vertical_split&quot;
	then
		before=&quot;leftabove vertical split&quot;
		after=&quot;wincmd l&quot;
		index=$index_vertical_split
		terminate=&quot;true&quot;
	fi

	if  test &quot;$terminate&quot; = &quot;true&quot;
	then
		CMD=&quot;$CMD | $before&quot;
		CMD=$(gen_cmd_aux &quot;$(substring &quot;$LAYOUT&quot; &quot;$start&quot; &quot;$(( index - start ))&quot;)&quot; &quot;$CMD&quot;)
		CMD=&quot;$CMD | $after&quot;
		CMD=$(gen_cmd_aux &quot;$(substring &quot;$LAYOUT&quot; &quot;$(( index + 1 ))&quot; &quot;$(( ${#LAYOUT} - index ))&quot;)&quot; &quot;$CMD&quot;)
		echo &quot;$CMD&quot;
		return
	fi


	# Step 4:
	#
	# If we reach this point, it means there are no separators and we just
	# need to print the command to display the specified buffer

	target=$(substring &quot;$LAYOUT&quot; &quot;$start&quot; &quot;$(( end - start ))&quot; | sed 's:[ @();|-]::g')

	if test &quot;$target&quot; = &quot;LOCAL&quot;
	then
		CMD=&quot;$CMD | 1b&quot;

	elif test &quot;$target&quot; = &quot;BASE&quot;
	then
		CMD=&quot;$CMD | 2b&quot;

	elif test &quot;$target&quot; = &quot;REMOTE&quot;
	then
		CMD=&quot;$CMD | 3b&quot;

	elif test &quot;$target&quot; = &quot;MERGED&quot;
	then
		CMD=&quot;$CMD | 4b&quot;

	else
		CMD=&quot;$CMD | ERROR: &gt;$target&lt;&quot;
	fi

	echo &quot;$CMD&quot;
	return
}


gen_cmd () {
	# This function returns (in global variable FINAL_CMD) the string that
	# you can use when invoking &quot;vim&quot; (as shown next) to obtain a given
	# layout:
	#
	#   $ vim -f $FINAL_CMD &quot;$LOCAL&quot; &quot;$BASE&quot; &quot;$REMOTE&quot; &quot;$MERGED&quot;
	#
	# It takes one single argument: a string containing the desired layout
	# definition.
	#
	# The syntax of the &quot;layout definitions&quot; is explained in &quot;Documentation/
	# mergetools/vimdiff.txt&quot; but you can already intuitively understand how
	# it works by knowing that...
	#
	#   * &quot;+&quot; means &quot;a new vim tab&quot;
	#   * &quot;/&quot; means &quot;a new vim horizontal split&quot;
	#   * &quot;,&quot; means &quot;a new vim vertical split&quot;
	#
	# It also returns (in global variable FINAL_TARGET) the name (&quot;LOCAL&quot;,
	# &quot;BASE&quot;, &quot;REMOTE&quot; or &quot;MERGED&quot;) of the file that is marked with an &quot;@&quot;,
	# or &quot;MERGED&quot; if none of them is.
	#
	# Example:
	#
	#     gen_cmd &quot;@LOCAL , REMOTE&quot;
	#     |
	#     `-&gt; FINAL_CMD    == &quot;-c \&quot;echo | leftabove vertical split | 1b | wincmd l | 3b | tabdo windo diffthis\&quot; -c \&quot;tabfirst\&quot;&quot;
	#         FINAL_TARGET == &quot;LOCAL&quot;

	LAYOUT=$1


	# Search for a &quot;@&quot; in one of the files identifiers (&quot;LOCAL&quot;, &quot;BASE&quot;,
	# &quot;REMOTE&quot;, &quot;MERGED&quot;). If not found, use &quot;MERGE&quot; as the default file
	# where changes will be saved.

	if echo &quot;$LAYOUT&quot; | grep @LOCAL &gt;/dev/null
	then
		FINAL_TARGET=&quot;LOCAL&quot;
	elif echo &quot;$LAYOUT&quot; | grep @BASE &gt;/dev/null
	then
		FINAL_TARGET=&quot;BASE&quot;
	else
		FINAL_TARGET=&quot;MERGED&quot;
	fi


	# Obtain the first part of vim &quot;-c&quot; option to obtain the desired layout

	CMD=
	oldIFS=$IFS
	IFS=+
	for tab in $LAYOUT
	do
		if test -z &quot;$CMD&quot;
		then
			CMD=&quot;echo&quot; # vim &quot;nop&quot; operator
		else
			CMD=&quot;$CMD | tabnew&quot;
		fi

		# If this is a single window diff with all the buffers
		if ! echo &quot;$tab&quot; | grep &quot;,\|/&quot; &gt;/dev/null
		then
			CMD=&quot;$CMD | silent execute 'bufdo diffthis'&quot;
		fi

		CMD=$(gen_cmd_aux &quot;$tab&quot; &quot;$CMD&quot;)
	done
	IFS=$oldIFS

	CMD=&quot;$CMD | execute 'tabdo windo diffthis'&quot;

	FINAL_CMD=&quot;-c \&quot;set hidden diffopt-=hiddenoff | $CMD | tabfirst\&quot;&quot;
}


################################################################################
## API functions (called from &quot;git-mergetool--lib.sh&quot;)
################################################################################

diff_cmd () {
	&quot;$merge_tool_path&quot; -R -f -d \
		-c 'wincmd l' -c 'cd $GIT_PREFIX' &quot;$LOCAL&quot; &quot;$REMOTE&quot;
}


diff_cmd_help () {
	TOOL=$1

	case &quot;$TOOL&quot; in
	nvimdiff*)
		printf &quot;Use Neovim&quot;
		;;
	gvimdiff*)
		printf &quot;Use gVim (requires a graphical session)&quot;
		;;
	vimdiff*)
		printf &quot;Use Vim&quot;
		;;
	esac

	return 0
}


merge_cmd () {
	layout=$(git config mergetool.vimdiff.layout)

	case &quot;$1&quot; in
	*vimdiff)
		if test -z &quot;$layout&quot;
		then
			# Default layout when none is specified
			layout=&quot;(LOCAL,BASE,REMOTE)/MERGED&quot;
		fi
		;;
	*vimdiff1)
		layout=&quot;@LOCAL,REMOTE&quot;
		;;
	*vimdiff2)
		layout=&quot;LOCAL,MERGED,REMOTE&quot;
		;;
	*vimdiff3)
		layout=&quot;MERGED&quot;
		;;
	esac

	gen_cmd &quot;$layout&quot;

	debug_print &quot;&quot;
	debug_print &quot;FINAL CMD : $FINAL_CMD&quot;
	debug_print &quot;FINAL TAR : $FINAL_TARGET&quot;

	if $base_present
	then
		eval '&quot;$merge_tool_path&quot;' \
			-f &quot;$FINAL_CMD&quot; '&quot;$LOCAL&quot;' '&quot;$BASE&quot;' '&quot;$REMOTE&quot;' '&quot;$MERGED&quot;'
	else
		# If there is no BASE (example: a merge conflict in a new file
		# with the same name created in both braches which didn't exist
		# before), close all BASE windows using vim's &quot;quit&quot; command

		FINAL_CMD=$(echo &quot;$FINAL_CMD&quot; | \
			sed -e 's:2b:quit:g' -e 's:3b:2b:g' -e 's:4b:3b:g')

		eval '&quot;$merge_tool_path&quot;' \
			-f &quot;$FINAL_CMD&quot; '&quot;$LOCAL&quot;' '&quot;$REMOTE&quot;' '&quot;$MERGED&quot;'
	fi

	ret=&quot;$?&quot;

	if test &quot;$ret&quot; -eq 0
	then
		case &quot;$FINAL_TARGET&quot; in
		LOCAL)
			source_path=&quot;$LOCAL&quot;
			;;
		REMOTE)
			source_path=&quot;$REMOTE&quot;
			;;
		MERGED|*)
			# Do nothing
			source_path=
			;;
		esac

		if test -n &quot;$source_path&quot;
		then
			cp &quot;$source_path&quot; &quot;$MERGED&quot;
		fi
	fi

	return &quot;$ret&quot;
}


merge_cmd_help () {
	TOOL=$1

	case &quot;$TOOL&quot; in
	nvimdiff*)
		printf &quot;Use Neovim &quot;
		;;
	gvimdiff*)
		printf &quot;Use gVim (requires a graphical session) &quot;
		;;
	vimdiff*)
		printf &quot;Use Vim &quot;
		;;
	esac

	case &quot;$TOOL&quot; in
	*1)
		echo &quot;with a 2 panes layout (LOCAL and REMOTE)&quot;
		;;
	*2)
		echo &quot;with a 3 panes layout (LOCAL, MERGED and REMOTE)&quot;
		;;
	*3)
		echo &quot;where only the MERGED file is shown&quot;
		;;
	*)
		echo &quot;with a custom layout (see \`git help mergetool\`'s \`BACKEND SPECIFIC HINTS\` section)&quot;
		;;
	esac

	return 0
}


translate_merge_tool_path () {
	case &quot;$1&quot; in
	nvimdiff*)
		echo nvim
		;;
	gvimdiff*)
		echo gvim
		;;
	vimdiff*)
		echo vim
		;;
	esac
}


exit_code_trustable () {
	true
}


list_tool_variants () {
	if test &quot;$TOOL_MODE&quot; = &quot;diff&quot;
	then
		for prefix in '' g n
		do
			echo &quot;${prefix}vimdiff&quot;
		done
	else
		for prefix in '' g n
		do
			for suffix in '' 1 2 3
			do
				echo &quot;${prefix}vimdiff${suffix}&quot;
			done
		done
	fi
}


################################################################################
## Unit tests (called from scripts inside the &quot;t&quot; folder)
################################################################################

run_unit_tests () {
	# Function to make sure that we don't break anything when modifying this
	# script.

	NUMBER_OF_TEST_CASES=16

	TEST_CASE_01=&quot;(LOCAL,BASE,REMOTE)/MERGED&quot;   # default behaviour
	TEST_CASE_02=&quot;@LOCAL,REMOTE&quot;                # when using vimdiff1
	TEST_CASE_03=&quot;LOCAL,MERGED,REMOTE&quot;          # when using vimdiff2
	TEST_CASE_04=&quot;MERGED&quot;                       # when using vimdiff3
	TEST_CASE_05=&quot;LOCAL/MERGED/REMOTE&quot;
	TEST_CASE_06=&quot;(LOCAL/REMOTE),MERGED&quot;
	TEST_CASE_07=&quot;MERGED,(LOCAL/REMOTE)&quot;
	TEST_CASE_08=&quot;(LOCAL,REMOTE)/MERGED&quot;
	TEST_CASE_09=&quot;MERGED/(LOCAL,REMOTE)&quot;
	TEST_CASE_10=&quot;(LOCAL/BASE/REMOTE),MERGED&quot;
	TEST_CASE_11=&quot;(LOCAL,BASE,REMOTE)/MERGED+BASE,LOCAL+BASE,REMOTE+(LOCAL/BASE/REMOTE),MERGED&quot;
	TEST_CASE_12=&quot;((LOCAL,REMOTE)/BASE),MERGED&quot;
	TEST_CASE_13=&quot;((LOCAL,REMOTE)/BASE),((LOCAL/REMOTE),MERGED)&quot;
	TEST_CASE_14=&quot;BASE,REMOTE+BASE,LOCAL&quot;
	TEST_CASE_15=&quot;  ((  (LOCAL , BASE , REMOTE) / MERGED))   +(BASE)   , LOCAL+ BASE , REMOTE+ (((LOCAL / BASE / REMOTE)) ,    MERGED   )  &quot;
	TEST_CASE_16=&quot;LOCAL,BASE,REMOTE / MERGED + BASE,LOCAL + BASE,REMOTE + (LOCAL / BASE / REMOTE),MERGED&quot;

	EXPECTED_CMD_01=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_02=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove vertical split | 1b | wincmd l | 3b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_03=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 4b | wincmd l | 3b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_04=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | silent execute 'bufdo diffthis' | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_05=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove split | 1b | wincmd j | leftabove split | 4b | wincmd j | 3b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_06=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove vertical split | leftabove split | 1b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_07=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove vertical split | 4b | wincmd l | leftabove split | 1b | wincmd j | 3b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_08=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_09=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove split | 4b | wincmd j | leftabove vertical split | 1b | wincmd l | 3b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_10=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_11=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnew | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_12=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove vertical split | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 2b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_13=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove vertical split | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 2b | wincmd l | leftabove vertical split | leftabove split | 1b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_14=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove vertical split | 2b | wincmd l | 3b | tabnew | leftabove vertical split | 2b | wincmd l | 1b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_15=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnew | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;
	EXPECTED_CMD_16=&quot;-c \&quot;set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnew | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | execute 'tabdo windo diffthis' | tabfirst\&quot;&quot;

	EXPECTED_TARGET_01=&quot;MERGED&quot;
	EXPECTED_TARGET_02=&quot;LOCAL&quot;
	EXPECTED_TARGET_03=&quot;MERGED&quot;
	EXPECTED_TARGET_04=&quot;MERGED&quot;
	EXPECTED_TARGET_05=&quot;MERGED&quot;
	EXPECTED_TARGET_06=&quot;MERGED&quot;
	EXPECTED_TARGET_07=&quot;MERGED&quot;
	EXPECTED_TARGET_08=&quot;MERGED&quot;
	EXPECTED_TARGET_09=&quot;MERGED&quot;
	EXPECTED_TARGET_10=&quot;MERGED&quot;
	EXPECTED_TARGET_11=&quot;MERGED&quot;
	EXPECTED_TARGET_12=&quot;MERGED&quot;
	EXPECTED_TARGET_13=&quot;MERGED&quot;
	EXPECTED_TARGET_14=&quot;MERGED&quot;
	EXPECTED_TARGET_15=&quot;MERGED&quot;
	EXPECTED_TARGET_16=&quot;MERGED&quot;

	at_least_one_ko=&quot;false&quot;

	for i in $(seq -w 1 99)
	do
		if test &quot;$i&quot; -gt $NUMBER_OF_TEST_CASES
		then
			break
		fi

		gen_cmd &quot;$(eval echo \${TEST_CASE_&quot;$i&quot;})&quot;

		if test &quot;$FINAL_CMD&quot; = &quot;$(eval echo \${EXPECTED_CMD_&quot;$i&quot;})&quot; \
			&amp;&amp; test &quot;$FINAL_TARGET&quot; = &quot;$(eval echo \${EXPECTED_TARGET_&quot;$i&quot;})&quot;
		then
			printf &quot;Test Case #%02d: OK\n&quot; &quot;$(echo &quot;$i&quot; | sed 's/^0*//')&quot;
		else
			printf &quot;Test Case #%02d: KO !!!!\n&quot; &quot;$(echo &quot;$i&quot; | sed 's/^0*//')&quot;
			echo &quot;  FINAL_CMD              : $FINAL_CMD&quot;
			echo &quot;  FINAL_CMD (expected)   : $(eval echo \${EXPECTED_CMD_&quot;$i&quot;})&quot;
			echo &quot;  FINAL_TARGET           : $FINAL_TARGET&quot;
			echo &quot;  FINAL_TARGET (expected): $(eval echo \${EXPECTED_TARGET_&quot;$i&quot;})&quot;
			at_least_one_ko=&quot;true&quot;
		fi
	done

	# verify that `merge_cmd` handles paths with spaces
	record_parameters () {
		&gt;actual
		for arg
		do
			echo &quot;$arg&quot; &gt;&gt;actual
		done
	}

	base_present=false
	LOCAL='lo cal'
	BASE='ba se'
	REMOTE=&quot;' '&quot;
	MERGED='mer ged'
	merge_tool_path=record_parameters

	merge_cmd vimdiff || at_least_one_ko=true

	cat &gt;expect &lt;&lt;-\EOF
	-f
	-c
	set hidden diffopt-=hiddenoff | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | quit | wincmd l | 2b | wincmd j | 3b | execute 'tabdo windo diffthis' | tabfirst
	lo cal
	' '
	mer ged
	EOF

	diff -u expect actual || at_least_one_ko=true

	if test &quot;$at_least_one_ko&quot; = &quot;true&quot;
	then
		return 255
	else
		return 0
	fi
}
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