private NETCoreSdkResolver.Result ResolveNETCoreSdkDirectory(SdkResolverContext context, string dotnetExeDir)
{
string globalJsonStartDir = Path.GetDirectoryName(context.SolutionFilePath ?? context.ProjectFilePath);
var result = NETCoreSdkResolver.ResolveSdk(dotnetExeDir, globalJsonStartDir, _vsSettings.DisallowPrerelease());
if (result.ResolvedSdkDirectory != null &&
result.GlobalJsonPath == null &&
context.MSBuildVersion < GetMinimumMSBuildVersion(result.ResolvedSdkDirectory))
{
string mostCompatible = GetMostCompatibleSdk(dotnetExeDir, context.MSBuildVersion);
if (mostCompatible != null)
{
result.ResolvedSdkDirectory = mostCompatible;
}
}
return(result);
}
private CompatibleSdkValue GetMostCompatibleSdks(string dotnetExeDirectory, Version msbuildVersion)
{
return(s_compatibleSdks.GetOrAdd(
new CompatibleSdkKey(dotnetExeDirectory, msbuildVersion),
key =>
{
string mostRecent = null;
string mostRecentNonPreview = null;
string[] availableSdks = NETCoreSdkResolver.GetAvailableSdks(key.DotnetExeDirectory);
for (int i = availableSdks.Length - 1; i >= 0; i--)
{
string netcoreSdkDir = availableSdks[i];
string netcoreSdkVersion = new DirectoryInfo(netcoreSdkDir).Name;
Version minimumMSBuildVersion = GetMinimumMSBuildVersion(netcoreSdkDir);
if (key.MSBuildVersion < minimumMSBuildVersion)
{
continue;
}
if (mostRecent == null)
{
mostRecent = netcoreSdkDir;
}
if (netcoreSdkVersion.IndexOf('-') < 0)
{
mostRecentNonPreview = netcoreSdkDir;
break;
}
}
return new CompatibleSdkValue(mostRecent, mostRecentNonPreview);
}));
}
