拷贝spine文件，过滤无用文件（lua 自用）

require 'lfs'
local function _copySpineFile(rootPath, targetPath, lastEntry)
    for entry in lfs.dir(rootPath) do
        if entry ~= '.' and entry ~= '..' then
            local path = rootPath .. '/' .. entry
            
            local attr = lfs.attributes(path)
            if attr.mode == 'directory' then
                _copySpineFile(path, targetPath, entry)
            else
            	if entry == lastEntry .. ".png" or entry == lastEntry .. ".atlas" or entry == lastEntry .. ".json" then
                    path = string.gsub(path, "/", "\\")
                    local newTargetPath = targetPath .. "/" .. lastEntry
                    newTargetPath =  string.gsub(newTargetPath, "/", "\\")
                    lfs.mkdir(newTargetPath)

                    local cmdStr = "xcopy " .. path .. " " .. newTargetPath .. " 1>nul 2>nul"
                    os.execute(cmdStr)
	            end
            end
        end
    end
end

--=======================test=======================
_copySpineFile("C:/Users/xxx/Desktop/needSpine", "C:/Users/xxx/Desktop/111")
--=======================test=======================