[PATCH 2/4] mergetool: move main program flow into a main() function

[David Aguilar <davvid@gmail.com>]

Signed-off-by: David Aguilar <davvid@gmail.com>
---
 git-mergetool.sh | 180 ++++++++++++++++++++++++++++---------------------------
 1 file changed, 93 insertions(+), 87 deletions(-)

diff --git a/git-mergetool.sh b/git-mergetool.sh
index 300ce7f..b2cd0a4 100755
--- a/git-mergetool.sh
+++ b/git-mergetool.sh
@@ -366,51 +366,6 @@ merge_file () {
 	return 0
 }
 
-prompt=$(git config --bool mergetool.prompt)
-guessed_merge_tool=false
-
-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 "$#,$1" in
-		*,*=*)
-			merge_tool=$(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
@@ -427,57 +382,108 @@ prompt_after_failed_merge () {
 	done
 }
 
-git_dir_init
-require_work_tree
+main () {
+	prompt=$(git config --bool mergetool.prompt)
+	guessed_merge_tool=false
+
+	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 "$#,$1" in
+			*,*=*)
+				merge_tool=$(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
+
+	git_dir_init
+	require_work_tree
 
-if test -z "$merge_tool"
-then
-	# Check if a merge tool has been configured
-	merge_tool=$(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
-		guessed_merge_tool=true
+		# 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=$(guess_merge_tool) || exit
+			guessed_merge_tool=true
+		fi
 	fi
-fi
-merge_keep_backup="$(git config --bool mergetool.keepBackup || echo true)"
-merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)"
-
-files=
+	merge_keep_backup="$(git config --bool mergetool.keepBackup || echo true)"
+	merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)"
 
-if test $# -eq 0
-then
-	cd_to_toplevel
+	files=
 
-	if test -e "$GIT_DIR/MERGE_RR"
+	if test $# -eq 0
 	then
-		files=$(git rerere remaining)
+		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)
+		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"
-
-rc=0
-for i in $files
-do
-	printf "\n"
-	if ! merge_file "$i"
+
+	if test -z "$files"
 	then
-		rc=1
-		prompt_after_failed_merge || exit 1
+		echo "No files need merging"
+		exit 0
 	fi
-done
 
-exit $rc
+	printf "Merging:\n"
+	printf "%s\n" "$files"
+
+	rc=0
+	for i in $files
+	do
+		printf "\n"
+		if ! merge_file "$i"
+		then
+			rc=1
+			prompt_after_failed_merge || exit 1
+		fi
+	done
+
+	exit $rc
+}
+
+main "$@"
-- 
2.10.1.355.g33afd83.dirty