public static bool BuildResUpdate(string oldz, string newz, string diff)
{
LinkedList<IDisposable> lstToDispose = new LinkedList<IDisposable>();
try
{
ZipArchive olda = null, newa = null, diffa = null;
try
{
var olds = File.OpenRead(oldz);
lstToDispose.AddFirst(olds);
olda = new ZipArchive(olds, ZipArchiveMode.Read);
lstToDispose.AddFirst(olda);
}
catch { }
try
{
var news = File.OpenRead(newz);
lstToDispose.AddFirst(news);
newa = new ZipArchive(news, ZipArchiveMode.Read);
lstToDispose.AddFirst(newa);
}
catch { }
HashSet<string> diffb = new HashSet<string>();
if (newa == null)
{
return false;
}
else if (Path.GetFileNameWithoutExtension(oldz) != Path.GetFileNameWithoutExtension(newz))
{
PlatDependant.LogError("Build update diff error - the old zip and new zip have different names.");
return false;
}
else
{
string mentry = "res/mani/" + Path.GetFileNameWithoutExtension(newz).ToLower() + ".m.ab";
CapsResManifest mold = null;
CapsResManifest mnew = null;
// get mani of old
try
{
if (olda != null)
{
var oldme = olda.GetEntry(mentry);
if (oldme != null)
{
using (var stream = oldme.Open())
{
using (var mems = new MemoryStream())
{
stream.CopyTo(mems);
var mab = UnityEngine.AssetBundle.LoadFromMemory(mems.ToArray());
if (mab)
{
var allassets = mab.LoadAllAssets<CapsResOnDiskManifest>();
if (allassets != null && allassets.Length > 0)
{
mold = CapsResManifest.Load(allassets[0]);
}
mab.Unload(true);
}
}
}
}
}
}
catch { }
// get mani of new
try
{
var newme = newa.GetEntry(mentry);
if (newme != null)
{
using (var stream = newme.Open())
{
using (var mems = new MemoryStream())
{
stream.CopyTo(mems);
var mab = UnityEngine.AssetBundle.LoadFromMemory(mems.ToArray());
if (mab)
{
var allassets = mab.LoadAllAssets<CapsResOnDiskManifest>();
if (allassets != null && allassets.Length > 0)
{
mnew = CapsResManifest.Load(allassets[0]);
}
mab.Unload(true);
}
}
}
}
}
catch { }
string abrootold = "res/";
string umpathold = "res/res";
if (mold != null && !string.IsNullOrEmpty(mold.MFlag))
{
abrootold += "mod/" + mold.MFlag + "/";
umpathold = abrootold + mold.MFlag;
}
string abrootnew = "res/";
string umpathnew = "res/res";
if (mnew != null && !string.IsNullOrEmpty(mnew.MFlag))
{
abrootnew += "mod/" + mnew.MFlag + "/";
umpathnew = abrootnew + mnew.MFlag;
}
// parse old manifest
UnityEngine.AssetBundleManifest maniold = null;
try
{
if (olda != null)
{
var emani = olda.GetEntry(umpathold);
if (emani != null)
{
using (var smani = emani.Open())
{
using (var mems = new MemoryStream())
{
smani.CopyTo(mems);
var resab = UnityEngine.AssetBundle.LoadFromMemory(mems.ToArray());
if (resab)
{
var allassets = resab.LoadAllAssets<UnityEngine.AssetBundleManifest>();
if (allassets != null && allassets.Length > 0)
{
maniold = allassets[0];
if (maniold)
{
maniold = Object.Instantiate(maniold);
}
}
resab.Unload(true);
}
}
}
}
}
}
catch { }
// parse new manifest
UnityEngine.AssetBundleManifest maninew = null;
try
{
var emani = newa.GetEntry(umpathnew);
if (emani != null)
{
using (var smani = emani.Open())
{
using (var mems = new MemoryStream())
{
smani.CopyTo(mems);
var resab = UnityEngine.AssetBundle.LoadFromMemory(mems.ToArray());
if (resab)
{
var allassets = resab.LoadAllAssets<UnityEngine.AssetBundleManifest>();
if (allassets != null && allassets.Length > 0)
{
maninew = allassets[0];
if (maninew != null)
{
maninew = Object.Instantiate(maninew);
}
}
resab.Unload(true);
}
}
}
}
}
catch { }
// both manifest found?
if (maninew == null)
{
File.Copy(newz, diff, true);
return true;
}
// parse diff assets and bundles
if (maninew != null)
{
var allbundles = maninew.GetAllAssetBundles();
foreach (var bundle in allbundles)
{
var newe = newa.GetEntry(abrootnew + bundle);
if (newe == null)
{
continue;
}
if (maniold != null && maninew.GetAssetBundleHash(bundle) == maniold.GetAssetBundleHash(bundle))
{
if (olda != null)
{
var olde = olda.GetEntry(abrootold + bundle);
if (olde != null)
{
if (olde.Length == newe.Length)
{
// TODO: sometimes the AssetBundleHash may be same (example: we deleted a sprite-atlas).
// we can diff these from: AssetBundle TypeTreeHash. we should load bundle.manifest and parse it use YAML. it's so difficult.
// or we can get the ab file's change time. but this information is not recorded to zip
// or we can get the crc of the entry. but it's private.
// or we can get md5 of the entry. but need full read.
// so we choose use length. In this condition, the ab file length's diff is almost a must.
continue;
}
}
}
}
diffb.Add(bundle);
}
}
// create update zip
if (diffb.Count > 0)
{
try
{
var streama = PlatDependant.OpenWrite(diff);
if (streama != null)
{
lstToDispose.AddFirst(streama);
diffa = new ZipArchive(streama, ZipArchiveMode.Create);
if (diffa != null)
{
lstToDispose.AddFirst(diffa);
// each bundle
foreach (var bundle in diffb)
{
try
{
var ename = abrootnew + bundle;
var entryn = newa.GetEntry(ename);
if (entryn != null)
{
var entryd = diffa.CreateEntry(ename, CompressionLevel.Optimal);
if (entryd != null)
{
using (var streamn = entryn.Open())
{
using (var streamd = entryd.Open())
{
streamn.CopyTo(streamd);
}
}
}
}
}
catch { }
}
// mani / unity manifest / version.txt
string[] rawcopyentries = new[] { mentry, umpathnew, "res/version.txt" };
for (int i = 0; i < rawcopyentries.Length; ++i)
{
var ename = rawcopyentries[i];
try
{
var entrys = newa.GetEntry(ename);
if (entrys != null)
{
var entryd = diffa.CreateEntry(ename, CompressionLevel.Optimal);
if (entryd != null)
{
using (var streams = entrys.Open())
{
using (var streamd = entryd.Open())
{
streams.CopyTo(streamd);
}
}
}
}
}
catch { }
}
}
}
}
catch { }
return true;
}
}
}
catch { }
finally
{
foreach (var dis in lstToDispose)
{
if (dis != null)
{
dis.Dispose();
}
}
}
return false;
}
