public async Task <bool> DownloadEngineIfNecessary(
string engineVersion,
Helpers.DownloadProgressCallback?progress = null,
CancellationToken cancel = default)
{
if (_cfg.EngineInstallations.Lookup(engineVersion).HasValue)
{
// Already have the engine version, we're good.
return(false);
}
Log.Information("Installing engine version {version}...", engineVersion);
Log.Debug("Loading manifest from {manifestUrl}...", ConfigConstants.RobustBuildsManifest);
var manifest =
await _http.GetFromJsonAsync <Dictionary <string, VersionInfo> >(
ConfigConstants.RobustBuildsManifest, cancellationToken : cancel);
if (!manifest !.TryGetValue(engineVersion, out var versionInfo))
{
throw new UpdateException("Unable to find engine version in manifest!");
}
if (versionInfo.Insecure)
{
throw new UpdateException("Specified engine version is insecure!");
}
var bestRid = RidUtility.FindBestRid(versionInfo.Platforms.Keys);
if (bestRid == null)
{
throw new UpdateException("No engine version available for our platform!");
}
Log.Debug("Selecting RID {rid}", bestRid);
var buildInfo = versionInfo.Platforms[bestRid];
Helpers.EnsureDirectoryExists(LauncherPaths.DirEngineInstallations);
var downloadTarget = Path.Combine(LauncherPaths.DirEngineInstallations, $"{engineVersion}.zip");
await using var file = File.Create(downloadTarget, 4096, FileOptions.Asynchronous);
try
{
await _http.DownloadToStream(buildInfo.Url, file, progress, cancel : cancel);
}
catch (OperationCanceledException)
{
// Don't leave behind garbage.
await file.DisposeAsync();
File.Delete(downloadTarget);
throw;
}
_cfg.AddEngineInstallation(new InstalledEngineVersion(engineVersion, buildInfo.Signature));
return(true);
}
public void TestFindBestRid(string[] rids, string start, string expected)
{
Assert.That(RidUtility.FindBestRid(rids, start), Is.EqualTo(expected));
}