luci-base: dispatcher.lua: factor out template class init into own function

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

modules/luci-base/luasrc/dispatcher.lua

@@ -668,55 +668,10 @@ function menu_json()
 	})
 end
 
-function dispatch(request)
+local function init_template_engine(ctx)
-	--context._disable_memtrace = require "luci.debug".trap_memtrace("l")
+	local tpl = require "luci.template"
-	local ctx = context
+	local media = luci.config.main.mediaurlbase
-	ctx.path = request
 
-	local c = ctx.tree
-	local stat
-	if not c then
-		c = createtree()
-	end
-
-	local track = {}
-	local args = {}
-	ctx.args = args
-	ctx.requestargs = ctx.requestargs or args
-	local n
-	local preq = {}
-	local freq = {}
-
-	for i, s in ipairs(request) do
-		preq[#preq+1] = s
-		freq[#freq+1] = s
-		c = c.nodes[s]
-		n = i
-		if not c then
-			break
-		end
-
-		util.update(track, c)
-
-		if c.leaf then
-			break
-		end
-	end
-
-	if c and c.leaf then
-		for j=n+1, #request do
-			args[#args+1] = request[j]
-			freq[#freq+1] = request[j]
-		end
-	end
-
-	ctx.requestpath = ctx.requestpath or freq
-	ctx.path = preq
-
-	-- Init template engine
-	if (c and c.index) or not track.notemplate then
-		local tpl = require("luci.template")
-		local media = track.mediaurlbase or luci.config.main.mediaurlbase
 	if not pcall(tpl.Template, "themes/%s/header" % fs.basename(media)) then
 		media = nil
 		for name, theme in pairs(luci.config.themes) do
@@ -787,6 +742,58 @@ function dispatch(request)
 			return rawget(tbl, key) or _G[key]
 		end
 	end})
+
+	return tpl
+end
+
+function dispatch(request)
+	--context._disable_memtrace = require "luci.debug".trap_memtrace("l")
+	local ctx = context
+	ctx.path = request
+
+	local c = ctx.tree
+	local stat
+	if not c then
+		c = createtree()
+	end
+
+	local track = {}
+	local args = {}
+	ctx.args = args
+	ctx.requestargs = ctx.requestargs or args
+	local n
+	local preq = {}
+	local freq = {}
+
+	for i, s in ipairs(request) do
+		preq[#preq+1] = s
+		freq[#freq+1] = s
+		c = c.nodes[s]
+		n = i
+		if not c then
+			break
+		end
+
+		util.update(track, c)
+
+		if c.leaf then
+			break
+		end
+	end
+
+	if c and c.leaf then
+		for j=n+1, #request do
+			args[#args+1] = request[j]
+			freq[#freq+1] = request[j]
+		end
+	end
+
+	ctx.requestpath = ctx.requestpath or freq
+	ctx.path = preq
+
+	-- Init template engine
+	if (c and c.index) or not track.notemplate then
+		init_template_engine(ctx)
 	end
 
 	track.dependent = (track.dependent ~= false)