private static Index DuplicateInstance(Index srcIndex, bool stripInstance)
{
//Debug.Log("DuplicateInstance - Started");
Index dstIndex = null;
if (srcIndex != null)
{
dstIndex = new Index();
dstIndex.m_filename = srcIndex.m_filename;
if (!stripInstance)
{
dstIndex.m_buildTag = srcIndex.m_buildTag;
}
dstIndex.m_assetBundles = new List <AssetBundle>();
dstIndex.m_assetBundles.Clear();
foreach (Index.AssetBundle srcAssetBundle in srcIndex.m_assetBundles)
{
Index.AssetBundle dstAssetBundle = new Index.AssetBundle();
dstAssetBundle.m_filename = srcAssetBundle.m_filename;
dstAssetBundle.m_type = srcAssetBundle.m_type;
dstAssetBundle.m_isCompressed = srcAssetBundle.m_isCompressed;
if (!stripInstance)
{
dstAssetBundle.m_size = srcAssetBundle.m_size;
dstAssetBundle.m_contentHash = srcAssetBundle.m_contentHash;
if (srcAssetBundle.m_urls != null)
{
dstAssetBundle.m_urls = new string[srcAssetBundle.m_urls.Length];
Array.Copy(srcAssetBundle.m_urls, dstAssetBundle.m_urls, srcAssetBundle.m_urls.Length);
}
else
{
dstAssetBundle.m_urls = null;
}
}
dstAssetBundle.m_assets = new List <Index.AssetBundle.Asset>();
dstAssetBundle.m_assets.Clear();
foreach (Index.AssetBundle.Asset srcAsset in srcAssetBundle.m_assets)
{
Index.AssetBundle.Asset dstAsset = new Index.AssetBundle.Asset();
dstAsset.m_filename = srcAsset.m_filename;
dstAsset.m_guid = srcAsset.m_guid;
if (!stripInstance)
{
dstAsset.m_hash = srcAsset.m_hash;
}
dstAssetBundle.m_assets.Add(dstAsset);
}
dstIndex.m_assetBundles.Add(dstAssetBundle);
}
}
//Debug.Log("DuplicateInstance - Finished");
return(dstIndex);
}
// TODO: comment it: computes hash of the asset bundle based on the specified assets
public static string ComputeAssetBundleHashDependingOnProvidedDistribution(Index index, Index.AssetBundle assetBundle)
{
Index.AssetBundle userAssetBundle = assetBundle;
Index.AssetBundle realAssetBundle = null;
foreach (Index.AssetBundle ab in index.m_assetBundles)
{
if (ab.m_filename.Equals(userAssetBundle.m_filename))
{
realAssetBundle = ab;
break;
}
}
Assertion.Check(realAssetBundle != null); // SANITY CHECK
// create a list contained user-defined assets (they could become just references)
List <string> references = new List <string>();
foreach (Index.AssetBundle.Asset asset in userAssetBundle.m_assets)
{
references.Add(asset.m_filename);
}
// now compute hash for the asset bundle
string ret = "";
foreach (Index.AssetBundle.Asset asset in realAssetBundle.m_assets)
{
string hash = File.Exists(asset.m_filename) ? ETUtils.CreateHashForAsset(asset.m_filename) : null; // hash of the content
ret = ETUtils.HashXorHash(ret, hash);
}
foreach (string assetFilepath in references)
{
string hash = ETUtils.CreateHashForString(assetFilepath); // hash of explicit asset name
ret = ETUtils.HashXorHash(ret, hash);
}
return(ret); // return null to compute hashes with base (incorrent) algorithm
}
// TODO: comment it: gets distribution (which assets in which bundles) in reality
public static Index ReorganizeDistribution(Index index)
{
Dictionary <string, Index.AssetBundle> userAssetsToBundles = GetUserDistribution(index);
Dictionary <string, Index.AssetBundle> realAssetsToBundles = GetRealDistribution(userAssetsToBundles);
Dictionary <string, List <string> > dist = new Dictionary <string, List <string> >();
foreach (KeyValuePair <string, Index.AssetBundle> kvp in realAssetsToBundles)
{
if (!dist.ContainsKey(kvp.Value.m_filename))
{
dist.Add(kvp.Value.m_filename, new List <string>());
}
dist[kvp.Value.m_filename].Add(kvp.Key);
}
index = Index.DuplicateInstance(index);
HashSet <Index.AssetBundle> checkedAssetBundles = new HashSet <Index.AssetBundle>();
HashSet <Index.AssetBundle.Asset> checkedAssets = new HashSet <Index.AssetBundle.Asset>();
foreach (KeyValuePair <string, List <string> > kvp in dist)
{
Index.AssetBundle assetBundle = null;
foreach (Index.AssetBundle ab in index.m_assetBundles)
{
if (ab.m_filename.Equals(kvp.Key))
{
assetBundle = ab;
break;
}
}
Assertion.Check(assetBundle != null);
if (assetBundle != null)
{
foreach (string val in kvp.Value)
{
Index.AssetBundle.Asset asset = null;
foreach (Index.AssetBundle.Asset a in assetBundle.m_assets)
{
if (a.m_filename.Equals(val))
{
asset = a;
break;
}
}
if (asset == null)
{
asset = new Index.AssetBundle.Asset();
asset.m_filename = val;
asset.m_guid = AssetDatabase.AssetPathToGUID(asset.m_filename);
assetBundle.m_assets.Add(asset);
}
asset.m_hash = File.Exists(asset.m_filename) ? ETUtils.CreateHashForAsset(asset.m_filename) : null;
checkedAssets.Add(asset);
}
checkedAssetBundles.Add(assetBundle);
}
}
foreach (Index.AssetBundle assetBundle in index.m_assetBundles)
{
if (checkedAssetBundles.Contains(assetBundle))
{
for (int idx = assetBundle.m_assets.Count - 1; idx >= 0; --idx)
{
if (!checkedAssets.Contains(assetBundle.m_assets[idx]))
{
assetBundle.m_assets.RemoveAt(idx);
}
}
}
else
{
assetBundle.m_assets.Clear();
}
}
return(index);
}
// TODO: comment it: computes hash of the asset bundle based on actually included assets only (not references!)
public static string ComputeAssetBundleHashDependingOnRealDistribution(Index index, Index.AssetBundle assetBundle)
{
// reorganize distribution, so hash would be computed as they should,
// i.e. based on real assets (and not their references) in the bundle
Index userIndex = index;
Index realIndex = ReorganizeDistribution(userIndex);
return(ComputeAssetBundleHashDependingOnProvidedDistribution(realIndex, assetBundle));
}