lua使用io.open跨平台文件夹遍历匹配查找

  -- Desc ：实现在LUA_PATH中的lua文件中遍历寻找没用到PNG_PATH路径下的png图片，并将其打印出来。
  -- Date ：12:49:28 2014-09-04 
 1 print("Lua Script Start")
 2 
 3 function getFileName( path )
 4     len = string.len(PNG_PATH);
 5     return string.sub(path, len+2) --  remove "/"
 6 end
 7 
 8 function isInIt( file,name )
 9     --print(file .. " -- " .. name )
10     for line in io.lines(file) do
11         if isContain(line , name) then 
12             return true;
13         end
14     end
15     return false;
16 end
17 
18 function isContain( line , str )
19     return string.find(line , str);
20 end
21 
22 PNG_PATH = "user/image" 
23 getPngFileTable = io.popen('find * ' .. PNG_PATH)
24 
25 pngFileTable = {};
26 for file in getPngFileTable:lines() do 
27     if string.find(file,"%.png$") then
28         fileName = getFileName(file);
29         print(fileName)
30         table.insert(pngFileTable,fileName);
31     end
32 end
33 print("png count is :"..#pngFileTable);
34 
35 LUA_PATH = "user/scripts"
36 getLuaFileInfo = io.popen('find * ' .. LUA_PATH)
37 luaFileTable = {};
38 for file in getLuaFileInfo:lines() do 
39     if string.find(file,"%.lua$") then
40         --print(file)
41         table.insert(luaFileTable,file);
42     end
43 end
44 
45 local pairs = pairs
46 for _,name in pairs(pngFileTable) do
47     flag = 0;
48     for _,file in pairs(luaFileTable) do
49         if isInIt(file , name) then 
50             flag = 1;
51             break;
52         end
53     end
54     if flag == 0 then 
55         print(name)
56     end
57 end
58 
59 print("Lua Script End!")
60 
61 --Desc: lua io.popen ([prog [, mode]])
62     --Starts program prog in a separated process and returns a file handle that 
63     --you can use to read data from this program (if mode is "r", the default) 
64     --or to write data to this program (if mode is "w").
65     --This function is system dependent and is not available on all platforms.