Create modutils.lua

modutils.lua

@@ -0,0 +1,42 @@
+local modutils = {}
+
+local function check_depend(this, modname)
+	local depends = this.depends
+	if depends[modname] then
+		return true
+	else
+		return false
+	end
+end
+
+function modutils.get_depend_checker(modname)
+	-- Definition of returning object attributes
+	local this = { }
+	this.modname = modname
+	this.depends = {} -- depends.txt parsed
+	this.check_depend = check_depend -- method
+
+	-- get module path
+	local modpath = minetest.get_modpath(modname)
+	if not modpath then
+		return nil -- module not found
+	end
+
+	-- read the depends file
+	local dependsfile = io.open(modpath .. "/depends.txt")
+	if not dependsfile then
+		return nil
+	end
+
+	-- parse the depends file
+	for line in dependsfile:lines() do
+		if line:sub(-1) == "?" then
+			line = line:sub(1, -2)
+		end
+		this.depends[line] = true
+	end
+
+	return this
+end
+
+return modutils