Revert "full fastindex integration, drop old cache stuff"

This reverts commit 19917e78d47dc33c3f75b7fac9585e534d144fd3.

libs/web/luasrc/dispatcher.lua

@@ -27,7 +27,6 @@ module("luci.dispatcher", package.seeall)
 require("luci.http")
 require("luci.sys")
 require("luci.fs")
-require("luci.fastindex")
 
 -- Dirty OpenWRT fix
 if (os.time() < luci.fs.mtime(luci.sys.libpath() .. "/dispatcher.lua")) then
@@ -50,8 +49,6 @@ dispatched = nil
 built_index = false
 built_tree  = false
 
--- Fastindex cache
-local fi = nil
 
 -- Builds a URL
 function build_url(...)
@@ -158,20 +155,75 @@ end
 function createindex()
 	index = {}
 	local path = luci.sys.libpath() .. "/controller/"
-	local suffix = ".lua"
+	local suff = ".lua"
+	
+	--[[if pcall(require, "fastindex") then
+		createindex_fastindex(path, suff)
+	else
+		createindex_plain(path, suff)
+	end]]--
+	
+	createindex_plain(path, suff)
+	
+	built_index = true
+end
 
-	if fi == nil then
+-- Uses fastindex to create the dispatching tree
-		fi = luci.fastindex.new("index")
+function createindex_fastindex(path, suffix)	
-		fi.add(path .. "*" .. suffix)
+	local fi = fastindex.new("index")
-		fi.add(path .. "*/*" .. suffix)
+	fi.add(path .. "*" .. suffix)
-	end
+	fi.add(path .. "*/*" .. suffix)
 	fi.scan()
-
+	
 	for k, v in pairs(fi.indexes) do
 		index[v[2]] = v[1]
 	end
+end
 
-	built_index = true
+-- Calls the index function of all available controllers
+function createindex_plain(path, suffix)
+	local cache = nil 
+	
+	local controllers = luci.util.combine(
+		luci.fs.glob(path .. "*" .. suffix) or {},
+		luci.fs.glob(path .. "*/*" .. suffix) or {}
+	)
+	
+	if indexcache then
+		cache = luci.fs.mtime(indexcache)
+		
+		if not cache then
+			luci.fs.mkdir(indexcache)
+			luci.fs.chmod(indexcache, "a=,u=rwx")
+			cache = luci.fs.mtime(indexcache)
+		end
+	end
+
+	for i,c in ipairs(controllers) do
+		local module = "luci.controller." .. c:sub(#path+1, #c-#suffix):gsub("/", ".")
+		local cachefile = indexcache .. "/" .. module
+		local stime
+		local ctime
+		
+		if cache then
+			stime = luci.fs.mtime(c) or 0
+			ctime = luci.fs.mtime(cachefile) or 0
+		end
+		
+		if not cache or stime > ctime then 
+			stat, mod = pcall(require, module)
+	
+			if stat and mod and type(mod.index) == "function" then
+				index[module] = mod.index
+				
+				if cache then
+					luci.fs.writefile(cachefile, luci.util.dump(mod.index))
+				end
+			end
+		else
+			index[module] = loadfile(cachefile)
+		end
+	end
 end
 
 -- Creates the dispatching tree from the index