Beef up lua hook, more extensive JSON support.

.lualocals

@@ -0,0 +1 @@
+print

luahook.lua

@@ -1,13 +1,55 @@
-local tostring = tostring
-local fmt = string.format
-local function q(x) return fmt("%q", tostring(x)) end
+-- LUALOCALS < ---------------------------------------------------------
+local dofile, io, ipairs, pairs, print, rawset, string, table,
+      tostring, type
+    = dofile, io, ipairs, pairs, print, rawset, string, table,
+      tostring, type
+local io_open, string_format, table_concat
+    = io.open, string.format, table.concat
+-- LUALOCALS > ---------------------------------------------------------
+
+local function slurp(fn)
+	local f = io_open(fn, "rb")
+	if not f then return end
+	local x = f:read("*all")
+	f:close()
+	return x
+end
+rawset(_G, "slurp", slurp)
+
+local ser = {}
+local function tojson(x)
+	return (ser[type(x)])(x)
+end
+ser["nil"] = function()
+	return "null"
+end
+ser["function"] = ser["nil"]
+ser["userdata"] = ser["nil"]
+ser["thread"] = ser["nil"]
+ser["number"] = function(x)
+	return tostring(x)
+end
+ser["boolean"] = ser["number"]
+ser["string"] = function(x)
+	return string_format("%q", x)
+end
+ser["table"] = function(x)
+	local arr = {}
+	for k, v in ipairs(x) do
+		arr[k] = tojson(v)
+	end
+	for k, v in pairs(x) do
+		if arr[k] == nil then
+			local obj = {}
+			for k, v in pairs(x) do
+				obj[#obj + 1] = string_format("%q:%s", tostring(k), arr[k] or tojson(v))
+			end
+			return "{" .. table_concat(obj, ",") .. "}"
+		end
+	end
+	return "[" .. table_concat(arr, ",") .. "]"
+end
+rawset(_G, "tojson", tojson)
 
 local data = dofile("./.cdbrelease.lua")
-
-print("{")
-local comma = ""
-for k, v in pairs(data) do
-	print(comma .. q(k) .. ": " .. q(v))
-	comma = ","
-end
-print("}")
+print(tojson(data))