wip: rewrite s6-rc-up-tree in an actual procgramming language

and write some tests for it, too

pkgs/s6-rc-up-tree/scripts/s6-rc

@@ -0,0 +1,15 @@
+#!/usr/bin/env sh
+
+echo s6-rc $@
+if [ "$1" = "-da" ]; then
+    if [ "$2" = "list" ]; then
+	echo wattle # controlled
+	echo wombat # controlled
+	echo turmeric # uncontrolled
+    fi
+fi
+if [ "$1" = "-u" ]; then
+    if [ "$2" = "change" ]; then
+	echo  "$3" >> $TEST_LOG
+    fi
+fi

pkgs/s6-rc-up-tree/scripts/s6-rc-db

@@ -0,0 +1,31 @@
+#!/usr/bin/env sh
+
+reverse_deps(){
+    echo $1
+    case "$1" in
+	thyme)
+	    echo rosemary
+	    ;;
+	enables-wan)
+	    echo wattle # controlled
+	    ;;
+    esac
+}
+
+deps(){
+    echo $1
+    case "$1" in
+	rosemary)
+	    echo thyme;;
+	*)
+	    ;;
+    esac
+}
+
+if test "$1" = "-d" && test "$2" = "all-dependencies"; then
+    shift; shift;
+    reverse_deps $@
+elif test "$1" = "all-dependencies"; then
+    shift;
+    deps $@
+fi