migrate-skiasharp.cake

#addin "nuget:?package=NuGet.Common&version=5.11.0"
#addin "nuget:?package=NuGet.Configuration&version=5.11.0"
#addin "nuget:?package=NuGet.Frameworks&version=5.11.0"
#addin "nuget:?package=NuGet.Packaging&version=5.11.0"
#addin "nuget:?package=NuGet.Protocol&version=5.11.0"
#addin "nuget:?package=NuGet.Versioning&version=5.11.0"

using NuGet.Common;
using NuGet.Packaging;
using NuGet.Packaging.Core;
using NuGet.Protocol;
using NuGet.Protocol.Core.Types;
using NuGet.Versioning;

Task("Default").Does(async () =>
{
   var gitSha = EnvironmentVariable("GIT_SHA");
   var destRoot = EnvironmentVariable("System_DefaultWorkingDirectory") ?? ".";
   if (!DirectoryExists(destRoot))
      CreateDirectory(destRoot);

   var OLD_FEED = "https://nugetized.blob.core.windows.net/skiasharp-eap/index.json";
   var NEW_FEED = "https://aka.ms/skiasharp-eap/index.json";

   var oldSource = Repository.Factory.GetCoreV3(OLD_FEED);
   var oldCache = new SourceCacheContext();
   var oldLogger = NullLogger.Instance;
   var oldMetadata = await oldSource.GetResourceAsync<PackageMetadataResource>();

   var newSource = Repository.Factory.GetCoreV3(NEW_FEED);
   var newCache = new SourceCacheContext();
   var newLogger = NullLogger.Instance;
   var newMetadata = await newSource.GetResourceAsync<PackageMetadataResource>();

   var oldPackage = new PackageIdentity("_NativeAssets", NuGetVersion.Parse("0.0.0-commit." + gitSha));

   var newExistingPackage = await newMetadata.GetMetadataAsync(oldPackage, newCache, newLogger, default);
   if (newExistingPackage == null)
   {
      Information("Downloading: " + oldPackage);

      var oldById = await oldSource.GetResourceAsync<FindPackageByIdResource>();
      using (var oldDownloader = await oldById.GetPackageDownloaderAsync(oldPackage, oldCache, oldLogger, default))
      {
         var fileName = oldPackage.ToString() + ".nupkg";
         fileName = System.IO.Path.Combine(destRoot, fileName);

         Information("Saving to: " + fileName);

         await oldDownloader.CopyNupkgFileToAsync(fileName, default);
      }
   }
   else
   {
      Information("Package existed: " + oldPackage);
   }

   Information("Done!");
});

RunTarget("Default");