public SdkResolutionResult ResolveNETCoreSdkDirectory(string globalJsonStartDir, Version msbuildVersion, bool isRunningInVisualStudio, string dotnetExeDir)
{
var result = NETCoreSdkResolverNativeWrapper.ResolveSdk(dotnetExeDir, globalJsonStartDir, _vsSettings.DisallowPrerelease());
string mostCompatible = result.ResolvedSdkDirectory;
if (result.ResolvedSdkDirectory == null &&
result.GlobalJsonPath != null &&
isRunningInVisualStudio)
{
result.FailedToResolveSDKSpecifiedInGlobalJson = true;
// We need the SDK to be version 5 or higher to ensure that we generate a build error when we fail to resolve the SDK specified by global.json
mostCompatible = GetMostCompatibleSdk(dotnetExeDir, msbuildVersion, 5);
}
else if (result.ResolvedSdkDirectory != null &&
result.GlobalJsonPath == null &&
msbuildVersion < GetMinimumMSBuildVersion(result.ResolvedSdkDirectory))
{
mostCompatible = GetMostCompatibleSdk(dotnetExeDir, msbuildVersion);
}
if (mostCompatible != null)
{
result.ResolvedSdkDirectory = mostCompatible;
}
return(result);
}
private CompatibleSdkValue GetMostCompatibleSdks(string dotnetExeDirectory, Version msbuildVersion, int minimumSdkMajorVersion)
{
return(s_compatibleSdks.GetOrAdd(
new CompatibleSdkKey(dotnetExeDirectory, msbuildVersion),
key =>
{
string mostRecent = null;
string mostRecentNonPreview = null;
string[] availableSdks = NETCoreSdkResolverNativeWrapper.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 (minimumSdkMajorVersion != 0 && Int32.TryParse(netcoreSdkVersion.Split('.')[0], out int sdkMajorVersion) && sdkMajorVersion < minimumSdkMajorVersion)
{
continue;
}
if (mostRecent == null)
{
mostRecent = netcoreSdkDir;
}
if (netcoreSdkVersion.IndexOf('-') < 0)
{
mostRecentNonPreview = netcoreSdkDir;
break;
}
}
return new CompatibleSdkValue(mostRecent, mostRecentNonPreview);
}));
}
