/// <summary>
/// 判断给定的路径是否是个有效的扩展包（每个扩展组是一个独立的扩展包）
/// </summary>
/// <param name="package_path"></param>
/// <returns></returns>
public static bool IsValidExtensionPackage(string package_path)
{
if (!Directory.Exists(package_path))
{
return(false);
}
//检查，扩展包的根目录下会有的几个东西
//FileHash
string hash_path = Path.Combine(package_path, VFSConst.AssetBundleFilesHash_FileName);
if (!File.Exists(hash_path))
{
return(false);
}
//group_option
if (!File.Exists(VFSUtil.Get_GroupOptions_InExtensionPackage(package_path)))
{
return(false);
}
//groupInfo
if (!File.Exists(VFSUtil.GetExtensionGroup_GroupInfo_Path_InGroupPath(package_path)))
{
return(false);
}
//manifest
if (!File.Exists(Path.Combine(package_path, VFSConst.AssetBundleManifestFileName)))
{
return(false);
}
return(true);
}
/// <summary>
/// 获取给定的根目录中（Packages root path），某个AssetBundle的位置
/// </summary>
/// <param name="isExtensionGroup"></param>
/// <param name="packages_root_path"></param>
/// <param name="assetBundleName"></param>
/// <param name="group_name"></param>
/// <returns></returns>
public static string GetAssetBundlePathFromPackages(bool isExtensionGroup, string packages_root_path, string assetBundleName, string group_name = null)
{
if (isExtensionGroup)
{
return(GetAssetBundlePathFromExtensionGroup_InExtensionPackagesRootFolder(GetExtensionPackageRootFolderInPackages(packages_root_path), group_name, assetBundleName));
}
else
{
return(Path.Combine(VFSUtil.GetMainPackageFolderInPackages(packages_root_path), assetBundleName));
}
}
/// <summary>
/// 在给定的目录下，寻找有效可用的扩展组信息，返回组数组
/// </summary>
/// <param name="extensions_root_path">存放扩展组的根目录，该方法只会搜寻它的直接子目录</param>
/// <param name="main_package_version">如果提供Main Package版本信息，将只会返回满足扩展组对MainPackage最低版本限制的扩展组列表</param>
/// <returns>组名 数组</returns>
public static string[] GetValidExtensionGroupNames(string extensions_root_path, long?main_package_version = null)
{
if (!Directory.Exists(extensions_root_path))
{
return(Array.Empty <string>());
}
List <string> groups = new List <string>();
string[] folders = Directory.GetDirectories(extensions_root_path, "*", SearchOption.TopDirectoryOnly);
foreach (var folder in folders)
{
if (VFSUtil.IsValidExtensionPackage(folder))
{
//读取groupName
try
{
string group_info_path = Path.Combine(folder, VFSConst.VFS_ExtensionGroupInfo_FileName);
string group_info_json = File.ReadAllText(group_info_path);
var group_info_obj = JsonUtility.FromJson <ExtensionGroupInfo>(group_info_json);
if (main_package_version != null)
{
//判断版本
if (main_package_version.Value >= group_info_obj.MainPackageVersionLimit)
{
groups.Add(group_info_obj.GroupName);
}
}
else
{
groups.Add(group_info_obj.GroupName);
}
}
catch (Exception e)
{
Debug.LogError("[TinaX.VFS] Exception while load extension package info : " + folder + "\n" + e.Message);
}
}
}
return(groups.ToArray());
}
/// <summary>
/// 在给定的根目录中，获取到某个扩展组的根目录
/// </summary>
/// <param name="packages_root_path"></param>
/// <param name="groupName"></param>
/// <returns></returns>
public static string GetExtensionGroupFolder(string packages_root_path, string groupName)
{
return(Path.Combine(VFSUtil.GetExtensionPackageRootFolderInPackages(packages_root_path), GetExtensionGroupFolderName(groupName)));
}