Add a command to rip nearby in radius

This is useful for "things used by a scematic"
sorts of scenarios.

Always block air/ignore just in case they end up
in the export list somehow.

commands.lua

@@ -42,3 +42,33 @@ minetest.register_chatcommand(modname .. "_inv", {
 			return true, "exported " .. exportall()
 		end
 	})
+
+	minetest.register_chatcommand(modname .. "_here", {
+		description = "Rip all nodes within a radius",
+		params = "[radius = 100]",
+		privs = {server = true},
+		func = function(name, param)
+			local player = minetest.get_player_by_name(name)
+			if not player then return false, "invalid player" end
+
+			local radius = tonumber(param) or 100
+			local pos = player:get_pos()
+
+			local foundids = {}
+			do
+				local vm = minetest.get_voxel_manip(
+					vector.subtract(pos, radius),
+					vector.add(pos, radius))
+				local data = vm:get_data()
+				for i = 1, #data do foundids[data[i]] = true end
+			end
+
+			for k in pairs(foundids) do
+				local n = minetest.get_name_from_content_id(k)
+				if n then exportdb[n] = true end
+			end
+
+			savedb()
+			return true, "exported " .. exportall()
+		end
+	})

exportall.lua

@@ -38,6 +38,11 @@ local nodekeys = {
 	wield_image = true,
 }
 
+local blocked = {
+	air = true,
+	ignore = true
+}
+
 local function exportall()
 	local count = 0
 
@@ -48,7 +53,7 @@ local function exportall()
 
 	local filtered = {}
 	for k, v in pairs(minetest.registered_items) do
-		if exportdb[k] and v.liquidtype ~= "flowing" then
+		if not blocked[k] and exportdb[k] and v.liquidtype ~= "flowing" then
 			local t = {}
 			for k2, v2 in pairs(v) do
 				local keydef = nodekeys[k2]