enhance config include

skynet-src/skynet_main.c

@@ -83,18 +83,32 @@ int sigign() {
 }
 
 static const char * load_config = "\
-	local config_name = ...\n\
-	local f = assert(io.open(config_name))\n\
-	local code = assert(f:read \'*a\')\n\
-	local function getenv(name) return assert(os.getenv(name), \'os.getenv() failed: \' .. name) end\n\
-	code = string.gsub(code, \'%$([%w_%d]+)\', getenv)\n\
-	f:close()\n\
 	local result = {}\n\
+	local function getenv(name) return assert(os.getenv(name), [[os.getenv() failed: ]] .. name) end\n\
+	local sep = package.config:sub(1,1)\n\
+	local current_path = [[.]]..sep\n\
 	local function include(filename)\n\
-		assert(loadfile(filename, \'t\', result))()\n\
+		local last_path = current_path\n\
+		local path, name = filename:match([[(.*]]..sep..[[)(.*)$]])\n\
+		if path then\n\
+			if path:sub(1,1) == sep then	-- root\n\
+				current_path = path\n\
+			else\n\
+				current_path = current_path .. path\n\
+			end\n\
+		else\n\
+			name = filename\n\
+		end\n\
+		local f = assert(io.open(current_path .. name))\n\
+		local code = assert(f:read [[*a]])\n\
+		code = string.gsub(code, [[%$([%w_%d]+)]], getenv)\n\
+		f:close()\n\
+		assert(load(code,[[@]]..filename,[[t]],result))()\n\
+		current_path = last_path\n\
 	end\n\
 	setmetatable(result, { __index = { include = include } })\n\
-	assert(load(code,\'=(load)\',\'t\',result))()\n\
+	local config_name = ...\n\
+	include(config_name)\n\
 	setmetatable(result, nil)\n\
 	return result\n\
 ";