mergetool: style fixes

This script is one of the sizeable ones that tempted people to copy
its "neibouring style" in their new code, but was littered with
styles incompatible with our style guide.

 - use one tab, not four spaces, per indent level;

 - long lines can be wrapped after '|', '&&', or '||' for
   readability.

 - structures like "if .. then .. else .. fi", "while .. do .. done"
   are split into lines in such a way that does not require
   unnecessary semicolon.

 - case, esac and case-arms align at the same column.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 308 insertions, 273 deletions

diff --git a/git-mergetool.sh b/git-mergetool.sh
index 0db0c44..c50e18a 100755
--- a/git-mergetool.sh
+++ b/git-mergetool.sh
@@ -18,270 +18,301 @@ require_work_tree
 
 # Returns true if the mode reflects a symlink
 is_symlink () {
-    test "$1" = 120000
+	test "$1" = 120000
 }
 
 is_submodule () {
-    test "$1" = 160000
+	test "$1" = 160000
 }
 
 local_present () {
-    test -n "$local_mode"
+	test -n "$local_mode"
 }
 
 remote_present () {
-    test -n "$remote_mode"
+	test -n "$remote_mode"
 }
 
 base_present () {
-    test -n "$base_mode"
+	test -n "$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
+	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"
-    else
-	if base_present; then
-	    echo "modified 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"
+		echo "created file"
 	fi
-    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 -- "$MERGED"
-		cleanup_temp_files --save-backup
-		return 0
-		;;
-	    [aA]*)
-		return 1
-		;;
-	    esac
+	while true
+	do
+		printf "Use (l)ocal or (r)emote, or (a)bort? "
+		read ans || return 1
+		case "$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 -- "$MERGED" > /dev/null
-		cleanup_temp_files
-		return 0
-		;;
-	    [aA]*)
-		return 1
-		;;
-	    esac
+	while true
+	do
+		if base_present
+		then
+			printf "Use (m)odified or (d)eleted file, or (a)bort? "
+		else
+			printf "Use (c)reated or (d)eleted file, or (a)bort? "
+		fi
+		read ans || return 1
+		case "$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 "$MERGED"
+	while true
+	do
+		printf "Use (l)ocal or (r)emote, or (a)bort? "
+		read ans || return 1
+		case "$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 -- "$MERGED"
+			fi
 			cleanup_temp_files --save-backup
-		    fi
-		elif is_submodule "$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
+			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
+	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
-	>"$3"
-    fi
+	tmpfile=$(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"
+	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"
+	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
-	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':"
+	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"
-	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
+	if "$prompt" = true
+	then
+		printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
+		read ans || return 1
 	fi
 
-	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
 
-    if test "$merge_keep_backup" = "true"; then
-	mv -- "$BACKUP" "$MERGED.orig"
-    else
-	rm -- "$BACKUP"
-    fi
+		return 1
+	fi
 
-    git add -- "$MERGED"
-    cleanup_temp_files
-    return 0
+	if test "$merge_keep_backup" = "true"
+	then
+		mv -- "$BACKUP" "$MERGED.orig"
+	else
+		rm -- "$BACKUP"
+	fi
+
+	git add -- "$MERGED"
+	cleanup_temp_files
+	return 0
 }
 
 show_tool_help () {
@@ -325,61 +356,61 @@ prompt=$(git config --bool mergetool.prompt || echo true)
 
 while test $# != 0
 do
-    case "$1" in
+	case "$1" in
 	--tool-help)
 		show_tool_help
 		;;
 	-t|--tool*)
-	    case "$#,$1" in
+		case "$#,$1" in
 		*,*=*)
-		    merge_tool=$(expr "z$1" : 'z-[^=]*=\(.*\)')
-		    ;;
+			merge_tool=$(expr "z$1" : 'z-[^=]*=\(.*\)')
+			;;
 		1,*)
-		    usage ;;
+			usage ;;
 		*)
-		    merge_tool="$2"
-		    shift ;;
-	    esac
-	    ;;
+			merge_tool="$2"
+			shift ;;
+		esac
+		;;
 	-y|--no-prompt)
-	    prompt=false
-	    ;;
+		prompt=false
+		;;
 	--prompt)
-	    prompt=true
-	    ;;
+		prompt=true
+		;;
 	--)
-	    shift
-	    break
-	    ;;
+		shift
+		break
+		;;
 	-*)
-	    usage
-	    ;;
-	*)
-	    break
-	    ;;
-    esac
-    shift
-done
-
-prompt_after_failed_merge() {
-    while true; do
-	printf "Continue merging other unresolved paths (y/n) ? "
-	read ans || return 1
-	case "$ans" in
-
-	    [yY]*)
-		return 0
+		usage
 		;;
-
-	    [nN]*)
-		return 1
+	*)
+		break
 		;;
 	esac
-    done
+	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 "$merge_tool") || exit
+if test -z "$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)"
@@ -388,22 +419,24 @@ last_status=0
 rollup_status=0
 files=
 
-if test $# -eq 0 ; then
-    cd_to_toplevel
+if test $# -eq 0
+then
+	cd_to_toplevel
 
-    if test -e "$GIT_DIR/MERGE_RR"
-    then
-	files=$(git rerere remaining)
-    else
-	files=$(git ls-files -u | sed -e 's/^[^	]*	//' | sort -u)
-    fi
+	if test -e "$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)
+	files=$(git ls-files -u -- "$@" | sed -e 's/^[^	]*	//' | sort -u)
 fi
 
-if test -z "$files" ; then
-    echo "No files need merging"
-    exit 0
+if test -z "$files"
+then
+	echo "No files need merging"
+	exit 0
 fi
 
 printf "Merging:\n"
@@ -413,15 +446,17 @@ 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
+	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