黑神话上线了，想起来学Lua了？

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------------------------------------------------------------------------- file or directory exists-----------------------------------------------------------------------function os.path.exists(name)  if name == '/' then    return true  end  if os.native and os.native.exists then    return os.native.exists(name)  end  local ok, err, code = os.rename(name, name)  if not ok then    if code == 13 or code == 17 then      return true    elseif code == 30 then      local f = io.open(name,"r")      if f ~= nil then        io.close(f)        return true      end    elseif name:sub(-1) == '/' and code == 20 and (not windows) then      local test = name .. '.'      ok, err, code = os.rename(test, test)      if code == 16 or code == 13 or code == 22 then        return true      end    end    return false  end  return trueend

------------------------------------------------------------------------- absolute path (system call, can fall back to os.path.absolute)-----------------------------------------------------------------------function os.path.abspath(path)  if path == '' then path = '.' end  if os.native and os.native.GetFullPathName then    local test = os.native.GetFullPathName(path)    if test then return test end  end  if windows then    local script = 'FOR /f "delims=" %%i IN ("%s") DO @echo %%~fi'    local script = string.format(script, path)    local script = 'cmd.exe /C ' .. script .. ' 2> nul'    local output = os.call(script)    local test = output:gsub('%s$', '')    if test ~= nil and test ~= '' then      return test    end  else    local test = os.path.which('realpath')    if test ~= nil and test ~= '' then      test = os.call('realpath -s \'' .. path .. '\' 2> /dev/null')      if test ~= nil and test ~= '' then        return test      end      test = os.call('realpath \'' .. path .. '\' 2> /dev/null')      if test ~= nil and test ~= '' then        return test      end    end    local test = os.path.which('perl')    if test ~= nil and test ~= '' then      local s = 'perl -MCwd -e "print Cwd::realpath(\\$ARGV[0])" \'%s\''      local s = string.format(s, path)      test = os.call(s)      if test ~= nil and test ~= '' then        return test      end    end    for _, python in pairs({'python3', 'python2', 'python'}) do      local s = 'sys.stdout.write(os.path.abspath(sys.argv[1]))'      local s = '-c "import os, sys;' .. s .. '" \'' .. path .. '\''      local s = python .. ' ' .. s      local test = os.path.which(python)      if test ~= nil and test ~= '' then        test = os.call(s)        if test ~= nil and test ~= '' then          return test        end      end    end  end  return os.path.absolute(path)end

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using System;using UnityEngine;
namespace HotUpdateCodeSample{
    public class HotCodeSample : MonoBehaviour    {        private long lastLogUpdateMinute = 0;
        // Start is called before the first frame update        void Start()        {            Debug.Log("[HotCodeSample::Start] this is a HotUpdateCodeSample::HotCodeSample::Start from hot update dll");        }
        // Update is called once per frame        void Update()        {            long currentMinute = DateTime.Now.Minute;            // 控制打印频率            if (currentMinute <= lastLogUpdateMinute)            {                return;            }
            this.lastLogUpdateMinute = currentMinute;            Debug.Log("[HotCodeSample::Update] this is a HotUpdateCodeSample::HotCodeSample::Update invoke from hot update dll");        }    }}

using System;using System.Collections;using System.IO;using System.Reflection;using UnityEngine;using UnityEngine.Networking;
public class AssetBundleLoader : MonoBehaviour{    // Start is called before the first frame update    void Start()    {        Debug.Log("[AssetBundleLoader::Start]");        // StartCoroutine(ReadAssetFromMemery());        StartCoroutine(ReadAssetFromRequest());    }
    // Update is called once per frame    void Update()    {
    }
    IEnumerator ReadAssetFromMemery()    {        Debug.Log("[AssetBundleLoader::ReadAssetFromMemery]");        // string path = @"pathToYourProject/AssetBundleDemo/AB/cube0.u3d";        string path = @"AB/cube0.u3d";        byte[] bytes = File.ReadAllBytes(path);        Debug.Log($"[ReadAssetFromMemery] bytes.length: {bytes.Length}");        AssetBundle cubeAssetBundle = AssetBundle.LoadFromMemory(bytes);        Debug.Log($"[ReadAssetFromMemery] cubeAssetBundle: {cubeAssetBundle}");
        GameObject prefabGameObject = cubeAssetBundle.LoadAsset<GameObject>("Cube");        Debug.Log($"[ReadAssetFromMemery] prefabGameObject: {prefabGameObject}");        GameObject cubeGameObject = GameObject.Instantiate(prefabGameObject);        Debug.Log("[ReadAssetFromMemery] finish");        yield return null;    }
    IEnumerator ReadAssetFromRequest()    {        Debug.Log("[AssetBundleLoader::ReadAssetFromRequest]");        string cubeUrl =@"file:///pathToYourProject/AssetBundleDemo/AB/cube0.u3d";        UnityWebRequest cubeRequest = UnityWebRequestAssetBundle.GetAssetBundle(cubeUrl);        yield return cubeRequest.SendWebRequest();        AssetBundle cubeAssetBundle = DownloadHandlerAssetBundle.GetContent(cubeRequest);        GameObject prefabGameObject = cubeAssetBundle.LoadAsset<GameObject>("Cube");        GameObject cubeGameObject = GameObject.Instantiate(prefabGameObject);        yield return null;
        string srcUrl =@"file:///pathToYourProject/AssetBundleDemo/AB/hotupatesample.dll";        UnityWebRequest srcRequest = UnityWebRequestAssetBundle.GetAssetBundle(srcUrl);        yield return srcRequest.SendWebRequest();        AssetBundle srcAssetBundle = DownloadHandlerAssetBundle.GetContent(srcRequest);        Debug.Log($"[ReadAssetFromRequest] srcAssetBundle: {srcAssetBundle}");        // 取 Asset 用 打包前的文件 Name，不区分大小写        TextAsset textAsset = srcAssetBundle.LoadAsset<TextAsset>("hotupdatecodesample.dll.bytes");        Debug.Log($"textAsset: {textAsset}");
        Assembly assembly = Assembly.Load(textAsset.bytes);        // 取类用类全名 FullName，用 `.` 连接        Type type = assembly.GetType("HotUpdateCodeSample.HotCodeSample");        cubeGameObject.AddComponent(type);    }}

using System.IO;using UnityEngine;using UnityEditor;
public class AssetBundleUtil : Editor{    [MenuItem("Utils/MakeAssetBundle")]    static void CreateAssetBundle()    {        Debug.Log("[CreateAssetBundle]");        string path = "AB";        if (!Directory.Exists(path))        {            Directory.CreateDirectory(path);        }
        BuildPipeline.BuildAssetBundles(path，BuildAssetBundleOptions.ChunkBasedCompression，BuildTarget.Android);        Debug.Log("[CreateAssetBundle] finish");    }}

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