lua跨平台文件夹遍历匹配查找

require"lfs"

--[[Desc：在B路径Ｄ文件中下　搜寻Ａ路径下的没用到的C类文件；
　　　　　 并且将没用到的B类文件名称打印出来； 
         设置好路径拖到lua自带编辑器中即可运行之;]]

--目标所在路径(A)(eg:png所在路径)
PNG_FILE_PATH = "E:/Resource/images"
--目标所寻路径(B)(eg:lua所在路径)
LUA_FILE_PATH = "E:/Resource/scripts"

--搜寻目标后缀config(C)
SEARCH_TARGET = "%.png"
--查找目标后缀config(D)
FIND_TARGET = "%.lua"

local pairs = pairs 
function findindir (path, wefind, r_table, intofolder, fileType)
    for file in lfs.dir(path) do
        if file ~= "." and file ~= ".." then
            local f = path..'/'..file
            local fname = file;
            if string.find(f, wefind) ~= nil then
                if fileType == "png" then
                    table.insert(r_table, fname)
                    --print(fname);
                elseif fileType == "lua" then
                    table.insert(r_table, f)
                    --print(f);
                end
            end
            local attr = lfs.attributes (f)
            assert (type(attr) == "table")
            if attr.mode == "directory" and intofolder then
                findindir (f, wefind, r_table, intofolder, fileType)
            else
                -- for name, value in pairs(attr) do
                --     print (name, value)
                -- end
            end
        end
    end
end

function isInIt( file,name )
    for line in file:lines() do
        if isContain(line , name) then
            return true;
        end
    end
    return false;
end

function isContain( line , str )
    return string.find(line , str);
end

----[[
local pngFilePath = PNG_FILE_PATH
local input_table_png = {}
findindir(pngFilePath, SEARCH_TARGET , input_table_png, true, "png")    -- "%.png$"
print(#input_table_png);
--]]

----[[
local luaFilePath = LUA_FILE_PATH
local input_table_lua = {}
findindir(luaFilePath, FIND_TARGET , input_table_lua, true, "lua")  -- "%.lua$"
print(#input_table_lua);
--]]

----[[
local count = 0;
for _,imageName in pairs(input_table_png) do
    local flag = 0
    for _,fileName in pairs(input_table_lua) do
        local fileInfo = io.open(fileName,"r")
        if isInIt(fileInfo , imageName) then
            flag = 1;
            break;
        end
    end
    if flag == 0 then
        print("No Exist Image Name Is:   "..imageName)
        count = count + 1;
    end
end

print("The File Count is:"..count);
----]]

lua文件lfs库可参见： http://keplerproject.github.io/luafilesystem/license.html