librc-depend: Split deptree generation into three functions

rc_deptree_generate does the generation of the deptree,
rc_deptree_backref does back references and sanity checks, lastly
rc_deptree_save write it to disk.

Author: navi-desu

sh/gendepends.sh.in

@@ -52,6 +52,71 @@ keyword() {
 depend() {
 	:
 }
+gendepend() {
+	[ -x "$RC_SERVICE" -a -f "$RC_SERVICE" ] || return
+
+	# Only generate dependencies for OpenRC scripts
+	read one two three <"$RC_SERVICE"
+	case "$one" in
+		\#*/openrc-run) ;;
+		\#*/runscript) ;;
+		\#!)
+			case "$two" in
+				*/openrc-run) ;;
+				*/runscript) ;;
+				*)
+					return
+					;;
+			esac
+			;;
+		*)
+			return
+			;;
+	esac
+	unset one two three
+
+	RC_SVCNAME=${RC_SERVICE##*/} ; export RC_SVCNAME
+
+	# Compat
+	SVCNAME=$RC_SVCNAME ; export SVCNAME
+
+	(
+	# Save stdout in fd3, then remap it to stderr
+	exec 3>&1 1>&2
+
+	_rc_c=${RC_SVCNAME%%.*}
+	if [ -n "$_rc_c" -a "$_rc_c" != "$RC_SVCNAME" ]; then
+		if [ -e "$_dir/../conf.d/$_rc_c" ]; then
+			. "$_dir/../conf.d/$_rc_c"
+		fi
+	fi
+	unset _rc_c
+
+	if [ -e "$_dir/../conf.d/$RC_SVCNAME" ]; then
+		. "$_dir/../conf.d/$RC_SVCNAME"
+	fi
+
+	[ -e @SYSCONFDIR@/rc.conf ] && . @SYSCONFDIR@/rc.conf
+	if [ -d "@SYSCONFDIR@/rc.conf.d" ]; then
+		for _f in "@SYSCONFDIR@"/rc.conf.d/*.conf; do
+			[ -e "$_f" ] && . "$_f"
+		done
+	fi
+
+	if . "$RC_SERVICE"; then
+		echo "$RC_SVCNAME" >&3
+		_depend
+	fi
+	)
+}
+
+if [ $# -gt 0 ]; then
+	_dir="$RC_SCRIPTDIR"
+	cd "$_dir"
+	for RC_SERVICE in "$@"; do
+		gendepend
+	done
+fi
 
 _done_dirs=
 for _dir in $RC_SCRIPTDIRS
@@ -67,61 +132,7 @@ do
 	_done_dirs="$_done_dirs $_dir"
 
 	cd "$_dir"
-	for RC_SERVICE in *; do
-		[ -x "$RC_SERVICE" -a -f "$RC_SERVICE" ] || continue
-
-		# Only generate dependencies for OpenRC scripts
-		read one two three <"$RC_SERVICE"
-		case "$one" in
-			\#*/openrc-run) ;;
-			\#*/runscript) ;;
-			\#!)
-				case "$two" in
-					*/openrc-run) ;;
-					*/runscript) ;;
-					*)
-						continue
-						;;
-				esac
-				;;
-			*)
-				continue
-				;;
-		esac
-		unset one two three
-
-		RC_SVCNAME=${RC_SERVICE##*/} ; export RC_SVCNAME
-
-		# Compat
-		SVCNAME=$RC_SVCNAME ; export SVCNAME
-
-		(
-		# Save stdout in fd3, then remap it to stderr
-		exec 3>&1 1>&2
-
-		_rc_c=${RC_SVCNAME%%.*}
-		if [ -n "$_rc_c" -a "$_rc_c" != "$RC_SVCNAME" ]; then
-			if [ -e "$_dir/../conf.d/$_rc_c" ]; then
-				. "$_dir/../conf.d/$_rc_c"
-			fi
-		fi
-		unset _rc_c
-
-		if [ -e "$_dir/../conf.d/$RC_SVCNAME" ]; then
-			. "$_dir/../conf.d/$RC_SVCNAME"
-		fi
-
-		[ -e @SYSCONFDIR@/rc.conf ] && . @SYSCONFDIR@/rc.conf
-		if [ -d "@SYSCONFDIR@/rc.conf.d" ]; then
-			for _f in "@SYSCONFDIR@"/rc.conf.d/*.conf; do
-				[ -e "$_f" ] && . "$_f"
-			done
-		fi
-
-		if . "$_dir/$RC_SVCNAME"; then
-			echo "$RC_SVCNAME" >&3
-			_depend
-		fi
-		)
+	for RC_SERVICE in "$_dir"/*; do
+		gendepend
 	done
 done