get_root_dir.lua

--[[
  rootDir = "/opt/project"
  this script is at /opt/project/sample.lua
  if you want to lua sample.lua and require your custom lua module.
  eg:
  /opt/project/dep/lua/xxx.lua
  /opt/project/dep/lib/lua/xxx.so   # some lua module c lib

    
--]]

-- may be fix bug
local rootPath = string.gsub(debug.getinfo(1).source, "^@(.+/).*%.lua$", "%1")  
-- rootPath is /opt/project/
depLuaDir = rootPath.."dep/"

depLuaPath = depLuaDir .. "lua/?.lua;"
depLuaCPath = depLuaDir .. "lib/lua/?.so;"

package.path = table.concat({depLuaPath, package.path})
package.cpath = table.concat({depLuaCPath..";", package.cpath})